diff --git a/dist/upyun.common.js b/dist/upyun.common.js
index 0366bb1..bfee622 100644
--- a/dist/upyun.common.js
+++ b/dist/upyun.common.js
@@ -1,5 +1,5 @@
 /**
-  * UPYUN js-sdk 3.3.8
+  * UPYUN js-sdk 3.3.9
   * (c) 2019
   * @license MIT
   */
@@ -8,6 +8,8 @@
 function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
 
 var axios = _interopDefault(require('axios'));
+var isPromise = _interopDefault(require('is-promise'));
+var url = _interopDefault(require('url'));
 var fs = _interopDefault(require('fs'));
 var mime = _interopDefault(require('mime-types'));
 var FormData = _interopDefault(require('form-data'));
@@ -35,19 +37,27 @@ axios.defaults.adapter = function () {
 }();
 
 var createReq = function (endpoint, service, getHeaderSign) {
+  var _ref = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {},
+      proxy = _ref.proxy;
+
   var req = axios.create({
     baseURL: endpoint + '/' + service.serviceName,
-    maxRedirects: 0
+    maxRedirects: 0,
+    proxy: proxy
   });
 
   req.interceptors.request.use(function (config) {
     var method = config.method.toUpperCase();
-    var path = config.url;
-    if (config.url.indexOf(config.baseURL) === 0) {
-      path = config.url.substring(config.baseURL.length);
+    var path = url.resolve('/', config.url || '');
+
+    if (path.indexOf(config.baseURL) === 0) {
+      path = path.substring(config.baseURL.length);
     }
     config.url = encodeURI(config.url);
-    return getHeaderSign(service, method, path, config.headers['Content-MD5']).then(function (headers) {
+    var headerSign = getHeaderSign(service, method, path, config.headers['Content-MD5']);
+    headerSign = isPromise(headerSign) ? headerSign : Promise.resolve(headerSign);
+
+    return headerSign.then(function (headers) {
       config.headers.common = headers;
       return Promise.resolve(config);
     });
@@ -168,7 +178,7 @@ function formUpload(remoteUrl, localFile, _ref) {
 }
 
 var name = "upyun";
-var version = "3.3.8";
+var version = "3.3.9";
 var description = "UPYUN js sdk";
 var main = "dist/upyun.common.js";
 var module$1 = "dist/upyun.esm.js";
@@ -181,8 +191,8 @@ var license = "MIT";
 var bugs = { "url": "https://github.com/upyun/node-sdk/issues" };
 var homepage = "https://github.com/upyun/node-sdk";
 var contributors = [{ "name": "yejingx", "email": "yejingx@gmail.com" }, { "name": "Leigh", "email": "i@zhuli.me" }, { "name": "kaidiren", "email": "kaidiren@gmail.com" }, { "name": "Gaara", "email": "sabakugaara@users.noreply.github.com" }];
-var devDependencies = { "babel-cli": "^6.24.1", "babel-loader": "^7.0.0", "babel-plugin-external-helpers": "^6.22.0", "babel-plugin-transform-runtime": "^6.23.0", "babel-preset-env": "^1.4.0", "babel-register": "^6.24.1", "chai": "^3.5.0", "eslint": "^5.16.0", "istanbul": "^0.4.3", "karma": "^1.7.0", "karma-chrome-launcher": "^2.1.1", "karma-mocha": "^1.3.0", "karma-sourcemap-loader": "^0.3.7", "karma-webpack": "^2.0.3", "mocha": "^3.4.1", "rollup": "^0.41.6", "rollup-plugin-alias": "^1.3.1", "rollup-plugin-babel": "^2.7.1", "rollup-plugin-commonjs": "^8.0.2", "rollup-plugin-json": "^2.1.1", "rollup-plugin-node-resolve": "^3.0.0", "should": "^9.0.2", "uglify-js": "^3.0.11", "webpack": "^2.5.1" };
-var dependencies = { "axios": "^0.16.1", "base-64": "^0.1.0", "form-data": "^2.1.4", "hmacsha1": "^1.0.0", "md5": "^2.2.1", "mime-types": "^2.1.15" };
+var devDependencies = { "babel-cli": "^6.24.1", "babel-loader": "^7.0.0", "babel-plugin-external-helpers": "^6.22.0", "babel-plugin-transform-runtime": "^6.23.0", "babel-preset-env": "^1.4.0", "babel-register": "^6.24.1", "chai": "^3.5.0", "delay": "^4.2.0", "eslint": "^5.16.0", "istanbul": "^0.4.3", "karma": "^1.7.0", "karma-chrome-launcher": "^2.1.1", "karma-mocha": "^1.3.0", "karma-sourcemap-loader": "^0.3.7", "karma-webpack": "^2.0.3", "mocha": "^3.4.1", "rollup": "^0.41.6", "rollup-plugin-alias": "^1.3.1", "rollup-plugin-babel": "^2.7.1", "rollup-plugin-commonjs": "^8.0.2", "rollup-plugin-json": "^2.1.1", "rollup-plugin-node-resolve": "^3.0.0", "should": "^9.0.2", "uglify-js": "^3.0.11", "webpack": "^2.5.1" };
+var dependencies = { "axios": "^0.18.0", "base-64": "^0.1.0", "form-data": "^2.1.4", "hmacsha1": "^1.0.0", "is-promise": "^2.1.0", "md5": "^2.2.1", "mime-types": "^2.1.15" };
 var browser = { "./upyun/utils.js": "./upyun/browser-utils.js", "./upyun/form-upload.js": "./upyun/browser-form-upload.js" };
 var pkg = {
 	name: name,
@@ -271,7 +281,8 @@ function getPolicyAndAuthorization(service, params) {
   var authorization = genSign(service, {
     method: 'POST',
     path: '/' + service.serviceName,
-    policy: policy
+    policy: policy,
+    contentMd5: params['content-md5']
   });
   return {
     policy: policy,
@@ -421,10 +432,14 @@ var Upyun = function () {
     var config = Object.assign({
       domain: 'v0.api.upyun.com',
       protocol: 'https'
+      // proxy: false // 禁用代理 // 参考 axios 配置. 如: {host: '127.0.0.1', post: 1081}
     }, params);
+
     this.endpoint = config.protocol + '://' + config.domain;
+    var proxy = config.proxy;
 
-    this.req = createReq(this.endpoint, service, getHeaderSign$$1 || defaultGetHeaderSign);
+    this.proxy = proxy;
+    this.req = createReq(this.endpoint, service, getHeaderSign$$1 || defaultGetHeaderSign, { proxy: proxy });
     // NOTE this will be removed
     this.bucket = service;
     this.service = service;
@@ -959,7 +974,33 @@ var Upyun = function () {
     value: function formPutFile(remotePath, localFile) {
       var _this4 = this;
 
-      var params = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
+      var orignParams = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
+
+      var params = {};
+      var _iteratorNormalCompletion3 = true;
+      var _didIteratorError3 = false;
+      var _iteratorError3 = undefined;
+
+      try {
+        for (var _iterator3 = Object.keys(orignParams)[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
+          var key = _step3.value;
+
+          params[key.toLowerCase()] = orignParams[key];
+        }
+      } catch (err) {
+        _didIteratorError3 = true;
+        _iteratorError3 = err;
+      } finally {
+        try {
+          if (!_iteratorNormalCompletion3 && _iterator3.return) {
+            _iterator3.return();
+          }
+        } finally {
+          if (_didIteratorError3) {
+            throw _iteratorError3;
+          }
+        }
+      }
 
       if (typeof this.bodySignCallback !== 'function') {
         throw new Error('upyun - must setBodySignCallback first!');
@@ -968,14 +1009,10 @@ var Upyun = function () {
       params['service'] = this.service.serviceName;
       params['save-key'] = remotePath;
       var result = this.bodySignCallback(this.service, params);
-      if (typeof result.then !== 'function') {
-        result = Promise.resolve(result);
-      }
+      result = isPromise(result) ? result : Promise.resolve(result);
 
       return result.then(function (bodySign) {
-        return formUpload(_this4.endpoint + '/' + params['service'], localFile, bodySign).then(function (result) {
-          return Promise.resolve(result);
-        });
+        return formUpload(_this4.endpoint + '/' + params['service'], localFile, bodySign);
       });
     }
   }, {
@@ -986,7 +1023,8 @@ var Upyun = function () {
       }
       var headers = sign.getPurgeHeaderSign(this.service, urls);
       return axios.post('http://purge.upyun.com/purge/', 'purge=' + urls.join('\n'), {
-        headers: headers
+        headers: headers,
+        proxy: this.proxy
       }).then(function (_ref16) {
         var data = _ref16.data;
 
@@ -1008,33 +1046,32 @@ function isMeta(key) {
 }
 
 function defaultGetHeaderSign() {
-  var headers = sign.getHeaderSign.apply(sign, arguments);
-  return Promise.resolve(headers);
+  return sign.getHeaderSign.apply(sign, arguments);
 }
 
 function key2LowerCase(obj) {
   var objLower = {};
-  var _iteratorNormalCompletion3 = true;
-  var _didIteratorError3 = false;
-  var _iteratorError3 = undefined;
+  var _iteratorNormalCompletion4 = true;
+  var _didIteratorError4 = false;
+  var _iteratorError4 = undefined;
 
   try {
-    for (var _iterator3 = Object.keys(obj)[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
-      var key = _step3.value;
+    for (var _iterator4 = Object.keys(obj)[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
+      var key = _step4.value;
 
       objLower[key.toLowerCase()] = obj[key];
     }
   } catch (err) {
-    _didIteratorError3 = true;
-    _iteratorError3 = err;
+    _didIteratorError4 = true;
+    _iteratorError4 = err;
   } finally {
     try {
-      if (!_iteratorNormalCompletion3 && _iterator3.return) {
-        _iterator3.return();
+      if (!_iteratorNormalCompletion4 && _iterator4.return) {
+        _iterator4.return();
       }
     } finally {
-      if (_didIteratorError3) {
-        throw _iteratorError3;
+      if (_didIteratorError4) {
+        throw _iteratorError4;
       }
     }
   }
diff --git a/dist/upyun.esm.js b/dist/upyun.esm.js
index 7069405..5e8a5d2 100644
--- a/dist/upyun.esm.js
+++ b/dist/upyun.esm.js
@@ -1,5 +1,5 @@
 /**
-  * UPYUN js-sdk 3.3.8
+  * UPYUN js-sdk 3.3.9
   * (c) 2019
   * @license MIT
   */
@@ -12,6 +12,1417 @@ var isBrowser = typeof window !== 'undefined' && (typeof process === 'undefined'
 
 var PARTSIZE = 1024 * 1024;
 
+var isPromise_1 = isPromise;
+
+function isPromise(obj) {
+  return !!obj && (typeof obj === 'object' || typeof obj === 'function') && typeof obj.then === 'function';
+}
+
+var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+
+
+
+
+
+function createCommonjsModule(fn, module) {
+	return module = { exports: {} }, fn(module, module.exports), module.exports;
+}
+
+var punycode = createCommonjsModule(function (module, exports) {
+/*! https://mths.be/punycode v1.3.2 by @mathias */
+(function(root) {
+
+	/** Detect free variables */
+	var freeExports = 'object' == 'object' && exports &&
+		!exports.nodeType && exports;
+	var freeModule = 'object' == 'object' && module &&
+		!module.nodeType && module;
+	var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal;
+	if (
+		freeGlobal.global === freeGlobal ||
+		freeGlobal.window === freeGlobal ||
+		freeGlobal.self === freeGlobal
+	) {
+		root = freeGlobal;
+	}
+
+	/**
+	 * The `punycode` object.
+	 * @name punycode
+	 * @type Object
+	 */
+	var punycode,
+
+	/** Highest positive signed 32-bit float value */
+	maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1
+
+	/** Bootstring parameters */
+	base = 36,
+	tMin = 1,
+	tMax = 26,
+	skew = 38,
+	damp = 700,
+	initialBias = 72,
+	initialN = 128, // 0x80
+	delimiter = '-', // '\x2D'
+
+	/** Regular expressions */
+	regexPunycode = /^xn--/,
+	regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
+	regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators
+
+	/** Error messages */
+	errors = {
+		'overflow': 'Overflow: input needs wider integers to process',
+		'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
+		'invalid-input': 'Invalid input'
+	},
+
+	/** Convenience shortcuts */
+	baseMinusTMin = base - tMin,
+	floor = Math.floor,
+	stringFromCharCode = String.fromCharCode,
+
+	/** Temporary variable */
+	key;
+
+	/*--------------------------------------------------------------------------*/
+
+	/**
+	 * A generic error utility function.
+	 * @private
+	 * @param {String} type The error type.
+	 * @returns {Error} Throws a `RangeError` with the applicable error message.
+	 */
+	function error(type) {
+		throw RangeError(errors[type]);
+	}
+
+	/**
+	 * A generic `Array#map` utility function.
+	 * @private
+	 * @param {Array} array The array to iterate over.
+	 * @param {Function} callback The function that gets called for every array
+	 * item.
+	 * @returns {Array} A new array of values returned by the callback function.
+	 */
+	function map(array, fn) {
+		var length = array.length;
+		var result = [];
+		while (length--) {
+			result[length] = fn(array[length]);
+		}
+		return result;
+	}
+
+	/**
+	 * A simple `Array#map`-like wrapper to work with domain name strings or email
+	 * addresses.
+	 * @private
+	 * @param {String} domain The domain name or email address.
+	 * @param {Function} callback The function that gets called for every
+	 * character.
+	 * @returns {Array} A new string of characters returned by the callback
+	 * function.
+	 */
+	function mapDomain(string, fn) {
+		var parts = string.split('@');
+		var result = '';
+		if (parts.length > 1) {
+			// In email addresses, only the domain name should be punycoded. Leave
+			// the local part (i.e. everything up to `@`) intact.
+			result = parts[0] + '@';
+			string = parts[1];
+		}
+		// Avoid `split(regex)` for IE8 compatibility. See #17.
+		string = string.replace(regexSeparators, '\x2E');
+		var labels = string.split('.');
+		var encoded = map(labels, fn).join('.');
+		return result + encoded;
+	}
+
+	/**
+	 * Creates an array containing the numeric code points of each Unicode
+	 * character in the string. While JavaScript uses UCS-2 internally,
+	 * this function will convert a pair of surrogate halves (each of which
+	 * UCS-2 exposes as separate characters) into a single code point,
+	 * matching UTF-16.
+	 * @see `punycode.ucs2.encode`
+	 * @see <https://mathiasbynens.be/notes/javascript-encoding>
+	 * @memberOf punycode.ucs2
+	 * @name decode
+	 * @param {String} string The Unicode input string (UCS-2).
+	 * @returns {Array} The new array of code points.
+	 */
+	function ucs2decode(string) {
+		var output = [],
+		    counter = 0,
+		    length = string.length,
+		    value,
+		    extra;
+		while (counter < length) {
+			value = string.charCodeAt(counter++);
+			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
+				// high surrogate, and there is a next character
+				extra = string.charCodeAt(counter++);
+				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
+					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
+				} else {
+					// unmatched surrogate; only append this code unit, in case the next
+					// code unit is the high surrogate of a surrogate pair
+					output.push(value);
+					counter--;
+				}
+			} else {
+				output.push(value);
+			}
+		}
+		return output;
+	}
+
+	/**
+	 * Creates a string based on an array of numeric code points.
+	 * @see `punycode.ucs2.decode`
+	 * @memberOf punycode.ucs2
+	 * @name encode
+	 * @param {Array} codePoints The array of numeric code points.
+	 * @returns {String} The new Unicode string (UCS-2).
+	 */
+	function ucs2encode(array) {
+		return map(array, function(value) {
+			var output = '';
+			if (value > 0xFFFF) {
+				value -= 0x10000;
+				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
+				value = 0xDC00 | value & 0x3FF;
+			}
+			output += stringFromCharCode(value);
+			return output;
+		}).join('');
+	}
+
+	/**
+	 * Converts a basic code point into a digit/integer.
+	 * @see `digitToBasic()`
+	 * @private
+	 * @param {Number} codePoint The basic numeric code point value.
+	 * @returns {Number} The numeric value of a basic code point (for use in
+	 * representing integers) in the range `0` to `base - 1`, or `base` if
+	 * the code point does not represent a value.
+	 */
+	function basicToDigit(codePoint) {
+		if (codePoint - 48 < 10) {
+			return codePoint - 22;
+		}
+		if (codePoint - 65 < 26) {
+			return codePoint - 65;
+		}
+		if (codePoint - 97 < 26) {
+			return codePoint - 97;
+		}
+		return base;
+	}
+
+	/**
+	 * Converts a digit/integer into a basic code point.
+	 * @see `basicToDigit()`
+	 * @private
+	 * @param {Number} digit The numeric value of a basic code point.
+	 * @returns {Number} The basic code point whose value (when used for
+	 * representing integers) is `digit`, which needs to be in the range
+	 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
+	 * used; else, the lowercase form is used. The behavior is undefined
+	 * if `flag` is non-zero and `digit` has no uppercase form.
+	 */
+	function digitToBasic(digit, flag) {
+		//  0..25 map to ASCII a..z or A..Z
+		// 26..35 map to ASCII 0..9
+		return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
+	}
+
+	/**
+	 * Bias adaptation function as per section 3.4 of RFC 3492.
+	 * http://tools.ietf.org/html/rfc3492#section-3.4
+	 * @private
+	 */
+	function adapt(delta, numPoints, firstTime) {
+		var k = 0;
+		delta = firstTime ? floor(delta / damp) : delta >> 1;
+		delta += floor(delta / numPoints);
+		for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
+			delta = floor(delta / baseMinusTMin);
+		}
+		return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
+	}
+
+	/**
+	 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
+	 * symbols.
+	 * @memberOf punycode
+	 * @param {String} input The Punycode string of ASCII-only symbols.
+	 * @returns {String} The resulting string of Unicode symbols.
+	 */
+	function decode(input) {
+		// Don't use UCS-2
+		var output = [],
+		    inputLength = input.length,
+		    out,
+		    i = 0,
+		    n = initialN,
+		    bias = initialBias,
+		    basic,
+		    j,
+		    index,
+		    oldi,
+		    w,
+		    k,
+		    digit,
+		    t,
+		    /** Cached calculation results */
+		    baseMinusT;
+
+		// Handle the basic code points: let `basic` be the number of input code
+		// points before the last delimiter, or `0` if there is none, then copy
+		// the first basic code points to the output.
+
+		basic = input.lastIndexOf(delimiter);
+		if (basic < 0) {
+			basic = 0;
+		}
+
+		for (j = 0; j < basic; ++j) {
+			// if it's not a basic code point
+			if (input.charCodeAt(j) >= 0x80) {
+				error('not-basic');
+			}
+			output.push(input.charCodeAt(j));
+		}
+
+		// Main decoding loop: start just after the last delimiter if any basic code
+		// points were copied; start at the beginning otherwise.
+
+		for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {
+
+			// `index` is the index of the next character to be consumed.
+			// Decode a generalized variable-length integer into `delta`,
+			// which gets added to `i`. The overflow checking is easier
+			// if we increase `i` as we go, then subtract off its starting
+			// value at the end to obtain `delta`.
+			for (oldi = i, w = 1, k = base; /* no condition */; k += base) {
+
+				if (index >= inputLength) {
+					error('invalid-input');
+				}
+
+				digit = basicToDigit(input.charCodeAt(index++));
+
+				if (digit >= base || digit > floor((maxInt - i) / w)) {
+					error('overflow');
+				}
+
+				i += digit * w;
+				t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+
+				if (digit < t) {
+					break;
+				}
+
+				baseMinusT = base - t;
+				if (w > floor(maxInt / baseMinusT)) {
+					error('overflow');
+				}
+
+				w *= baseMinusT;
+
+			}
+
+			out = output.length + 1;
+			bias = adapt(i - oldi, out, oldi == 0);
+
+			// `i` was supposed to wrap around from `out` to `0`,
+			// incrementing `n` each time, so we'll fix that now:
+			if (floor(i / out) > maxInt - n) {
+				error('overflow');
+			}
+
+			n += floor(i / out);
+			i %= out;
+
+			// Insert `n` at position `i` of the output
+			output.splice(i++, 0, n);
+
+		}
+
+		return ucs2encode(output);
+	}
+
+	/**
+	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
+	 * Punycode string of ASCII-only symbols.
+	 * @memberOf punycode
+	 * @param {String} input The string of Unicode symbols.
+	 * @returns {String} The resulting Punycode string of ASCII-only symbols.
+	 */
+	function encode(input) {
+		var n,
+		    delta,
+		    handledCPCount,
+		    basicLength,
+		    bias,
+		    j,
+		    m,
+		    q,
+		    k,
+		    t,
+		    currentValue,
+		    output = [],
+		    /** `inputLength` will hold the number of code points in `input`. */
+		    inputLength,
+		    /** Cached calculation results */
+		    handledCPCountPlusOne,
+		    baseMinusT,
+		    qMinusT;
+
+		// Convert the input in UCS-2 to Unicode
+		input = ucs2decode(input);
+
+		// Cache the length
+		inputLength = input.length;
+
+		// Initialize the state
+		n = initialN;
+		delta = 0;
+		bias = initialBias;
+
+		// Handle the basic code points
+		for (j = 0; j < inputLength; ++j) {
+			currentValue = input[j];
+			if (currentValue < 0x80) {
+				output.push(stringFromCharCode(currentValue));
+			}
+		}
+
+		handledCPCount = basicLength = output.length;
+
+		// `handledCPCount` is the number of code points that have been handled;
+		// `basicLength` is the number of basic code points.
+
+		// Finish the basic string - if it is not empty - with a delimiter
+		if (basicLength) {
+			output.push(delimiter);
+		}
+
+		// Main encoding loop:
+		while (handledCPCount < inputLength) {
+
+			// All non-basic code points < n have been handled already. Find the next
+			// larger one:
+			for (m = maxInt, j = 0; j < inputLength; ++j) {
+				currentValue = input[j];
+				if (currentValue >= n && currentValue < m) {
+					m = currentValue;
+				}
+			}
+
+			// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
+			// but guard against overflow
+			handledCPCountPlusOne = handledCPCount + 1;
+			if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
+				error('overflow');
+			}
+
+			delta += (m - n) * handledCPCountPlusOne;
+			n = m;
+
+			for (j = 0; j < inputLength; ++j) {
+				currentValue = input[j];
+
+				if (currentValue < n && ++delta > maxInt) {
+					error('overflow');
+				}
+
+				if (currentValue == n) {
+					// Represent delta as a generalized variable-length integer
+					for (q = delta, k = base; /* no condition */; k += base) {
+						t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+						if (q < t) {
+							break;
+						}
+						qMinusT = q - t;
+						baseMinusT = base - t;
+						output.push(
+							stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
+						);
+						q = floor(qMinusT / baseMinusT);
+					}
+
+					output.push(stringFromCharCode(digitToBasic(q, 0)));
+					bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+					delta = 0;
+					++handledCPCount;
+				}
+			}
+
+			++delta;
+			++n;
+
+		}
+		return output.join('');
+	}
+
+	/**
+	 * Converts a Punycode string representing a domain name or an email address
+	 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
+	 * it doesn't matter if you call it on a string that has already been
+	 * converted to Unicode.
+	 * @memberOf punycode
+	 * @param {String} input The Punycoded domain name or email address to
+	 * convert to Unicode.
+	 * @returns {String} The Unicode representation of the given Punycode
+	 * string.
+	 */
+	function toUnicode(input) {
+		return mapDomain(input, function(string) {
+			return regexPunycode.test(string)
+				? decode(string.slice(4).toLowerCase())
+				: string;
+		});
+	}
+
+	/**
+	 * Converts a Unicode string representing a domain name or an email address to
+	 * Punycode. Only the non-ASCII parts of the domain name will be converted,
+	 * i.e. it doesn't matter if you call it with a domain that's already in
+	 * ASCII.
+	 * @memberOf punycode
+	 * @param {String} input The domain name or email address to convert, as a
+	 * Unicode string.
+	 * @returns {String} The Punycode representation of the given domain name or
+	 * email address.
+	 */
+	function toASCII(input) {
+		return mapDomain(input, function(string) {
+			return regexNonASCII.test(string)
+				? 'xn--' + encode(string)
+				: string;
+		});
+	}
+
+	/*--------------------------------------------------------------------------*/
+
+	/** Define the public API */
+	punycode = {
+		/**
+		 * A string representing the current Punycode.js version number.
+		 * @memberOf punycode
+		 * @type String
+		 */
+		'version': '1.3.2',
+		/**
+		 * An object of methods to convert from JavaScript's internal character
+		 * representation (UCS-2) to Unicode code points, and back.
+		 * @see <https://mathiasbynens.be/notes/javascript-encoding>
+		 * @memberOf punycode
+		 * @type Object
+		 */
+		'ucs2': {
+			'decode': ucs2decode,
+			'encode': ucs2encode
+		},
+		'decode': decode,
+		'encode': encode,
+		'toASCII': toASCII,
+		'toUnicode': toUnicode
+	};
+
+	/** Expose `punycode` */
+	// Some AMD build optimizers, like r.js, check for specific condition patterns
+	// like the following:
+	if (
+		typeof undefined == 'function' &&
+		typeof undefined.amd == 'object' &&
+		undefined.amd
+	) {
+		undefined('punycode', function() {
+			return punycode;
+		});
+	} else if (freeExports && freeModule) {
+		if (module.exports == freeExports) { // in Node.js or RingoJS v0.8.0+
+			freeModule.exports = punycode;
+		} else { // in Narwhal or RingoJS v0.7.0-
+			for (key in punycode) {
+				punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
+			}
+		}
+	} else { // in Rhino or a web browser
+		root.punycode = punycode;
+	}
+
+}(commonjsGlobal));
+});
+
+var util = {
+  isString: function(arg) {
+    return typeof(arg) === 'string';
+  },
+  isObject: function(arg) {
+    return typeof(arg) === 'object' && arg !== null;
+  },
+  isNull: function(arg) {
+    return arg === null;
+  },
+  isNullOrUndefined: function(arg) {
+    return arg == null;
+  }
+};
+
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// If obj.hasOwnProperty has been overridden, then calling
+// obj.hasOwnProperty(prop) will break.
+// See: https://github.com/joyent/node/issues/1707
+function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
+}
+
+var decode = function(qs, sep, eq, options) {
+  sep = sep || '&';
+  eq = eq || '=';
+  var obj = {};
+
+  if (typeof qs !== 'string' || qs.length === 0) {
+    return obj;
+  }
+
+  var regexp = /\+/g;
+  qs = qs.split(sep);
+
+  var maxKeys = 1000;
+  if (options && typeof options.maxKeys === 'number') {
+    maxKeys = options.maxKeys;
+  }
+
+  var len = qs.length;
+  // maxKeys <= 0 means that we should not limit keys count
+  if (maxKeys > 0 && len > maxKeys) {
+    len = maxKeys;
+  }
+
+  for (var i = 0; i < len; ++i) {
+    var x = qs[i].replace(regexp, '%20'),
+        idx = x.indexOf(eq),
+        kstr, vstr, k, v;
+
+    if (idx >= 0) {
+      kstr = x.substr(0, idx);
+      vstr = x.substr(idx + 1);
+    } else {
+      kstr = x;
+      vstr = '';
+    }
+
+    k = decodeURIComponent(kstr);
+    v = decodeURIComponent(vstr);
+
+    if (!hasOwnProperty(obj, k)) {
+      obj[k] = v;
+    } else if (Array.isArray(obj[k])) {
+      obj[k].push(v);
+    } else {
+      obj[k] = [obj[k], v];
+    }
+  }
+
+  return obj;
+};
+
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var stringifyPrimitive = function(v) {
+  switch (typeof v) {
+    case 'string':
+      return v;
+
+    case 'boolean':
+      return v ? 'true' : 'false';
+
+    case 'number':
+      return isFinite(v) ? v : '';
+
+    default:
+      return '';
+  }
+};
+
+var encode = function(obj, sep, eq, name) {
+  sep = sep || '&';
+  eq = eq || '=';
+  if (obj === null) {
+    obj = undefined;
+  }
+
+  if (typeof obj === 'object') {
+    return Object.keys(obj).map(function(k) {
+      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;
+      if (Array.isArray(obj[k])) {
+        return obj[k].map(function(v) {
+          return ks + encodeURIComponent(stringifyPrimitive(v));
+        }).join(sep);
+      } else {
+        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));
+      }
+    }).join(sep);
+
+  }
+
+  if (!name) return '';
+  return encodeURIComponent(stringifyPrimitive(name)) + eq +
+         encodeURIComponent(stringifyPrimitive(obj));
+};
+
+var querystring = createCommonjsModule(function (module, exports) {
+'use strict';
+
+exports.decode = exports.parse = decode;
+exports.encode = exports.stringify = encode;
+});
+
+var parse = urlParse;
+var resolve = urlResolve;
+var resolveObject = urlResolveObject;
+var format = urlFormat;
+
+var Url_1 = Url;
+
+function Url() {
+  this.protocol = null;
+  this.slashes = null;
+  this.auth = null;
+  this.host = null;
+  this.port = null;
+  this.hostname = null;
+  this.hash = null;
+  this.search = null;
+  this.query = null;
+  this.pathname = null;
+  this.path = null;
+  this.href = null;
+}
+
+// Reference: RFC 3986, RFC 1808, RFC 2396
+
+// define these here so at least they only have to be
+// compiled once on the first module load.
+var protocolPattern = /^([a-z0-9.+-]+:)/i;
+var portPattern = /:[0-9]*$/;
+var simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/;
+var delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'];
+var unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims);
+var autoEscape = ['\''].concat(unwise);
+var nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape);
+var hostEndingChars = ['/', '?', '#'];
+var hostnameMaxLen = 255;
+var hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/;
+var hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/;
+var unsafeProtocol = {
+      'javascript': true,
+      'javascript:': true
+    };
+var hostlessProtocol = {
+      'javascript': true,
+      'javascript:': true
+    };
+var slashedProtocol = {
+      'http': true,
+      'https': true,
+      'ftp': true,
+      'gopher': true,
+      'file': true,
+      'http:': true,
+      'https:': true,
+      'ftp:': true,
+      'gopher:': true,
+      'file:': true
+    };
+
+function urlParse(url, parseQueryString, slashesDenoteHost) {
+  if (url && util.isObject(url) && url instanceof Url) return url;
+
+  var u = new Url;
+  u.parse(url, parseQueryString, slashesDenoteHost);
+  return u;
+}
+
+Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
+  if (!util.isString(url)) {
+    throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
+  }
+
+  // Copy chrome, IE, opera backslash-handling behavior.
+  // Back slashes before the query string get converted to forward slashes
+  // See: https://code.google.com/p/chromium/issues/detail?id=25916
+  var queryIndex = url.indexOf('?'),
+      splitter =
+          (queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',
+      uSplit = url.split(splitter),
+      slashRegex = /\\/g;
+  uSplit[0] = uSplit[0].replace(slashRegex, '/');
+  url = uSplit.join(splitter);
+
+  var rest = url;
+
+  // trim before proceeding.
+  // This is to support parse stuff like "  http://foo.com  \n"
+  rest = rest.trim();
+
+  if (!slashesDenoteHost && url.split('#').length === 1) {
+    // Try fast path regexp
+    var simplePath = simplePathPattern.exec(rest);
+    if (simplePath) {
+      this.path = rest;
+      this.href = rest;
+      this.pathname = simplePath[1];
+      if (simplePath[2]) {
+        this.search = simplePath[2];
+        if (parseQueryString) {
+          this.query = querystring.parse(this.search.substr(1));
+        } else {
+          this.query = this.search.substr(1);
+        }
+      } else if (parseQueryString) {
+        this.search = '';
+        this.query = {};
+      }
+      return this;
+    }
+  }
+
+  var proto = protocolPattern.exec(rest);
+  if (proto) {
+    proto = proto[0];
+    var lowerProto = proto.toLowerCase();
+    this.protocol = lowerProto;
+    rest = rest.substr(proto.length);
+  }
+
+  // figure out if it's got a host
+  // user@server is *always* interpreted as a hostname, and url
+  // resolution will treat //foo/bar as host=foo,path=bar because that's
+  // how the browser resolves relative URLs.
+  if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
+    var slashes = rest.substr(0, 2) === '//';
+    if (slashes && !(proto && hostlessProtocol[proto])) {
+      rest = rest.substr(2);
+      this.slashes = true;
+    }
+  }
+
+  if (!hostlessProtocol[proto] &&
+      (slashes || (proto && !slashedProtocol[proto]))) {
+
+    // there's a hostname.
+    // the first instance of /, ?, ;, or # ends the host.
+    //
+    // If there is an @ in the hostname, then non-host chars *are* allowed
+    // to the left of the last @ sign, unless some host-ending character
+    // comes *before* the @-sign.
+    // URLs are obnoxious.
+    //
+    // ex:
+    // http://a@b@c/ => user:a@b host:c
+    // http://a@b?@c => user:a host:c path:/?@c
+
+    // v0.12 TODO(isaacs): This is not quite how Chrome does things.
+    // Review our test case against browsers more comprehensively.
+
+    // find the first instance of any hostEndingChars
+    var hostEnd = -1;
+    for (var i = 0; i < hostEndingChars.length; i++) {
+      var hec = rest.indexOf(hostEndingChars[i]);
+      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
+        hostEnd = hec;
+    }
+
+    // at this point, either we have an explicit point where the
+    // auth portion cannot go past, or the last @ char is the decider.
+    var auth, atSign;
+    if (hostEnd === -1) {
+      // atSign can be anywhere.
+      atSign = rest.lastIndexOf('@');
+    } else {
+      // atSign must be in auth portion.
+      // http://a@b/c@d => host:b auth:a path:/c@d
+      atSign = rest.lastIndexOf('@', hostEnd);
+    }
+
+    // Now we have a portion which is definitely the auth.
+    // Pull that off.
+    if (atSign !== -1) {
+      auth = rest.slice(0, atSign);
+      rest = rest.slice(atSign + 1);
+      this.auth = decodeURIComponent(auth);
+    }
+
+    // the host is the remaining to the left of the first non-host char
+    hostEnd = -1;
+    for (var i = 0; i < nonHostChars.length; i++) {
+      var hec = rest.indexOf(nonHostChars[i]);
+      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
+        hostEnd = hec;
+    }
+    // if we still have not hit it, then the entire thing is a host.
+    if (hostEnd === -1)
+      hostEnd = rest.length;
+
+    this.host = rest.slice(0, hostEnd);
+    rest = rest.slice(hostEnd);
+
+    // pull out port.
+    this.parseHost();
+
+    // we've indicated that there is a hostname,
+    // so even if it's empty, it has to be present.
+    this.hostname = this.hostname || '';
+
+    // if hostname begins with [ and ends with ]
+    // assume that it's an IPv6 address.
+    var ipv6Hostname = this.hostname[0] === '[' &&
+        this.hostname[this.hostname.length - 1] === ']';
+
+    // validate a little.
+    if (!ipv6Hostname) {
+      var hostparts = this.hostname.split(/\./);
+      for (var i = 0, l = hostparts.length; i < l; i++) {
+        var part = hostparts[i];
+        if (!part) continue;
+        if (!part.match(hostnamePartPattern)) {
+          var newpart = '';
+          for (var j = 0, k = part.length; j < k; j++) {
+            if (part.charCodeAt(j) > 127) {
+              // we replace non-ASCII char with a temporary placeholder
+              // we need this to make sure size of hostname is not
+              // broken by replacing non-ASCII by nothing
+              newpart += 'x';
+            } else {
+              newpart += part[j];
+            }
+          }
+          // we test again with ASCII char only
+          if (!newpart.match(hostnamePartPattern)) {
+            var validParts = hostparts.slice(0, i);
+            var notHost = hostparts.slice(i + 1);
+            var bit = part.match(hostnamePartStart);
+            if (bit) {
+              validParts.push(bit[1]);
+              notHost.unshift(bit[2]);
+            }
+            if (notHost.length) {
+              rest = '/' + notHost.join('.') + rest;
+            }
+            this.hostname = validParts.join('.');
+            break;
+          }
+        }
+      }
+    }
+
+    if (this.hostname.length > hostnameMaxLen) {
+      this.hostname = '';
+    } else {
+      // hostnames are always lower case.
+      this.hostname = this.hostname.toLowerCase();
+    }
+
+    if (!ipv6Hostname) {
+      // IDNA Support: Returns a punycoded representation of "domain".
+      // It only converts parts of the domain name that
+      // have non-ASCII characters, i.e. it doesn't matter if
+      // you call it with a domain that already is ASCII-only.
+      this.hostname = punycode.toASCII(this.hostname);
+    }
+
+    var p = this.port ? ':' + this.port : '';
+    var h = this.hostname || '';
+    this.host = h + p;
+    this.href += this.host;
+
+    // strip [ and ] from the hostname
+    // the host field still retains them, though
+    if (ipv6Hostname) {
+      this.hostname = this.hostname.substr(1, this.hostname.length - 2);
+      if (rest[0] !== '/') {
+        rest = '/' + rest;
+      }
+    }
+  }
+
+  // now rest is set to the post-host stuff.
+  // chop off any delim chars.
+  if (!unsafeProtocol[lowerProto]) {
+
+    // First, make 100% sure that any "autoEscape" chars get
+    // escaped, even if encodeURIComponent doesn't think they
+    // need to be.
+    for (var i = 0, l = autoEscape.length; i < l; i++) {
+      var ae = autoEscape[i];
+      if (rest.indexOf(ae) === -1)
+        continue;
+      var esc = encodeURIComponent(ae);
+      if (esc === ae) {
+        esc = escape(ae);
+      }
+      rest = rest.split(ae).join(esc);
+    }
+  }
+
+
+  // chop off from the tail first.
+  var hash = rest.indexOf('#');
+  if (hash !== -1) {
+    // got a fragment string.
+    this.hash = rest.substr(hash);
+    rest = rest.slice(0, hash);
+  }
+  var qm = rest.indexOf('?');
+  if (qm !== -1) {
+    this.search = rest.substr(qm);
+    this.query = rest.substr(qm + 1);
+    if (parseQueryString) {
+      this.query = querystring.parse(this.query);
+    }
+    rest = rest.slice(0, qm);
+  } else if (parseQueryString) {
+    // no query string, but parseQueryString still requested
+    this.search = '';
+    this.query = {};
+  }
+  if (rest) this.pathname = rest;
+  if (slashedProtocol[lowerProto] &&
+      this.hostname && !this.pathname) {
+    this.pathname = '/';
+  }
+
+  //to support http.request
+  if (this.pathname || this.search) {
+    var p = this.pathname || '';
+    var s = this.search || '';
+    this.path = p + s;
+  }
+
+  // finally, reconstruct the href based on what has been validated.
+  this.href = this.format();
+  return this;
+};
+
+// format a parsed object into a url string
+function urlFormat(obj) {
+  // ensure it's an object, and not a string url.
+  // If it's an obj, this is a no-op.
+  // this way, you can call url_format() on strings
+  // to clean up potentially wonky urls.
+  if (util.isString(obj)) obj = urlParse(obj);
+  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
+  return obj.format();
+}
+
+Url.prototype.format = function() {
+  var auth = this.auth || '';
+  if (auth) {
+    auth = encodeURIComponent(auth);
+    auth = auth.replace(/%3A/i, ':');
+    auth += '@';
+  }
+
+  var protocol = this.protocol || '',
+      pathname = this.pathname || '',
+      hash = this.hash || '',
+      host = false,
+      query = '';
+
+  if (this.host) {
+    host = auth + this.host;
+  } else if (this.hostname) {
+    host = auth + (this.hostname.indexOf(':') === -1 ?
+        this.hostname :
+        '[' + this.hostname + ']');
+    if (this.port) {
+      host += ':' + this.port;
+    }
+  }
+
+  if (this.query &&
+      util.isObject(this.query) &&
+      Object.keys(this.query).length) {
+    query = querystring.stringify(this.query);
+  }
+
+  var search = this.search || (query && ('?' + query)) || '';
+
+  if (protocol && protocol.substr(-1) !== ':') protocol += ':';
+
+  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.
+  // unless they had them to begin with.
+  if (this.slashes ||
+      (!protocol || slashedProtocol[protocol]) && host !== false) {
+    host = '//' + (host || '');
+    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;
+  } else if (!host) {
+    host = '';
+  }
+
+  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;
+  if (search && search.charAt(0) !== '?') search = '?' + search;
+
+  pathname = pathname.replace(/[?#]/g, function(match) {
+    return encodeURIComponent(match);
+  });
+  search = search.replace('#', '%23');
+
+  return protocol + host + pathname + search + hash;
+};
+
+function urlResolve(source, relative) {
+  return urlParse(source, false, true).resolve(relative);
+}
+
+Url.prototype.resolve = function(relative) {
+  return this.resolveObject(urlParse(relative, false, true)).format();
+};
+
+function urlResolveObject(source, relative) {
+  if (!source) return relative;
+  return urlParse(source, false, true).resolveObject(relative);
+}
+
+Url.prototype.resolveObject = function(relative) {
+  if (util.isString(relative)) {
+    var rel = new Url();
+    rel.parse(relative, false, true);
+    relative = rel;
+  }
+
+  var result = new Url();
+  var tkeys = Object.keys(this);
+  for (var tk = 0; tk < tkeys.length; tk++) {
+    var tkey = tkeys[tk];
+    result[tkey] = this[tkey];
+  }
+
+  // hash is always overridden, no matter what.
+  // even href="" will remove it.
+  result.hash = relative.hash;
+
+  // if the relative url is empty, then there's nothing left to do here.
+  if (relative.href === '') {
+    result.href = result.format();
+    return result;
+  }
+
+  // hrefs like //foo/bar always cut to the protocol.
+  if (relative.slashes && !relative.protocol) {
+    // take everything except the protocol from relative
+    var rkeys = Object.keys(relative);
+    for (var rk = 0; rk < rkeys.length; rk++) {
+      var rkey = rkeys[rk];
+      if (rkey !== 'protocol')
+        result[rkey] = relative[rkey];
+    }
+
+    //urlParse appends trailing / to urls like http://www.example.com
+    if (slashedProtocol[result.protocol] &&
+        result.hostname && !result.pathname) {
+      result.path = result.pathname = '/';
+    }
+
+    result.href = result.format();
+    return result;
+  }
+
+  if (relative.protocol && relative.protocol !== result.protocol) {
+    // if it's a known url protocol, then changing
+    // the protocol does weird things
+    // first, if it's not file:, then we MUST have a host,
+    // and if there was a path
+    // to begin with, then we MUST have a path.
+    // if it is file:, then the host is dropped,
+    // because that's known to be hostless.
+    // anything else is assumed to be absolute.
+    if (!slashedProtocol[relative.protocol]) {
+      var keys = Object.keys(relative);
+      for (var v = 0; v < keys.length; v++) {
+        var k = keys[v];
+        result[k] = relative[k];
+      }
+      result.href = result.format();
+      return result;
+    }
+
+    result.protocol = relative.protocol;
+    if (!relative.host && !hostlessProtocol[relative.protocol]) {
+      var relPath = (relative.pathname || '').split('/');
+      while (relPath.length && !(relative.host = relPath.shift()));
+      if (!relative.host) relative.host = '';
+      if (!relative.hostname) relative.hostname = '';
+      if (relPath[0] !== '') relPath.unshift('');
+      if (relPath.length < 2) relPath.unshift('');
+      result.pathname = relPath.join('/');
+    } else {
+      result.pathname = relative.pathname;
+    }
+    result.search = relative.search;
+    result.query = relative.query;
+    result.host = relative.host || '';
+    result.auth = relative.auth;
+    result.hostname = relative.hostname || relative.host;
+    result.port = relative.port;
+    // to support http.request
+    if (result.pathname || result.search) {
+      var p = result.pathname || '';
+      var s = result.search || '';
+      result.path = p + s;
+    }
+    result.slashes = result.slashes || relative.slashes;
+    result.href = result.format();
+    return result;
+  }
+
+  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),
+      isRelAbs = (
+          relative.host ||
+          relative.pathname && relative.pathname.charAt(0) === '/'
+      ),
+      mustEndAbs = (isRelAbs || isSourceAbs ||
+                    (result.host && relative.pathname)),
+      removeAllDots = mustEndAbs,
+      srcPath = result.pathname && result.pathname.split('/') || [],
+      relPath = relative.pathname && relative.pathname.split('/') || [],
+      psychotic = result.protocol && !slashedProtocol[result.protocol];
+
+  // if the url is a non-slashed url, then relative
+  // links like ../.. should be able
+  // to crawl up to the hostname, as well.  This is strange.
+  // result.protocol has already been set by now.
+  // Later on, put the first path part into the host field.
+  if (psychotic) {
+    result.hostname = '';
+    result.port = null;
+    if (result.host) {
+      if (srcPath[0] === '') srcPath[0] = result.host;
+      else srcPath.unshift(result.host);
+    }
+    result.host = '';
+    if (relative.protocol) {
+      relative.hostname = null;
+      relative.port = null;
+      if (relative.host) {
+        if (relPath[0] === '') relPath[0] = relative.host;
+        else relPath.unshift(relative.host);
+      }
+      relative.host = null;
+    }
+    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
+  }
+
+  if (isRelAbs) {
+    // it's absolute.
+    result.host = (relative.host || relative.host === '') ?
+                  relative.host : result.host;
+    result.hostname = (relative.hostname || relative.hostname === '') ?
+                      relative.hostname : result.hostname;
+    result.search = relative.search;
+    result.query = relative.query;
+    srcPath = relPath;
+    // fall through to the dot-handling below.
+  } else if (relPath.length) {
+    // it's relative
+    // throw away the existing file, and take the new path instead.
+    if (!srcPath) srcPath = [];
+    srcPath.pop();
+    srcPath = srcPath.concat(relPath);
+    result.search = relative.search;
+    result.query = relative.query;
+  } else if (!util.isNullOrUndefined(relative.search)) {
+    // just pull out the search.
+    // like href='?foo'.
+    // Put this after the other two cases because it simplifies the booleans
+    if (psychotic) {
+      result.hostname = result.host = srcPath.shift();
+      //occationaly the auth can get stuck only in host
+      //this especially happens in cases like
+      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
+      var authInHost = result.host && result.host.indexOf('@') > 0 ?
+                       result.host.split('@') : false;
+      if (authInHost) {
+        result.auth = authInHost.shift();
+        result.host = result.hostname = authInHost.shift();
+      }
+    }
+    result.search = relative.search;
+    result.query = relative.query;
+    //to support http.request
+    if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
+      result.path = (result.pathname ? result.pathname : '') +
+                    (result.search ? result.search : '');
+    }
+    result.href = result.format();
+    return result;
+  }
+
+  if (!srcPath.length) {
+    // no path at all.  easy.
+    // we've already handled the other stuff above.
+    result.pathname = null;
+    //to support http.request
+    if (result.search) {
+      result.path = '/' + result.search;
+    } else {
+      result.path = null;
+    }
+    result.href = result.format();
+    return result;
+  }
+
+  // if a url ENDs in . or .., then it must get a trailing slash.
+  // however, if it ends in anything else non-slashy,
+  // then it must NOT get a trailing slash.
+  var last = srcPath.slice(-1)[0];
+  var hasTrailingSlash = (
+      (result.host || relative.host || srcPath.length > 1) &&
+      (last === '.' || last === '..') || last === '');
+
+  // strip single dots, resolve double dots to parent dir
+  // if the path tries to go above the root, `up` ends up > 0
+  var up = 0;
+  for (var i = srcPath.length; i >= 0; i--) {
+    last = srcPath[i];
+    if (last === '.') {
+      srcPath.splice(i, 1);
+    } else if (last === '..') {
+      srcPath.splice(i, 1);
+      up++;
+    } else if (up) {
+      srcPath.splice(i, 1);
+      up--;
+    }
+  }
+
+  // if the path is allowed to go above the root, restore leading ..s
+  if (!mustEndAbs && !removeAllDots) {
+    for (; up--; up) {
+      srcPath.unshift('..');
+    }
+  }
+
+  if (mustEndAbs && srcPath[0] !== '' &&
+      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
+    srcPath.unshift('');
+  }
+
+  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {
+    srcPath.push('');
+  }
+
+  var isAbsolute = srcPath[0] === '' ||
+      (srcPath[0] && srcPath[0].charAt(0) === '/');
+
+  // put the host back
+  if (psychotic) {
+    result.hostname = result.host = isAbsolute ? '' :
+                                    srcPath.length ? srcPath.shift() : '';
+    //occationaly the auth can get stuck only in host
+    //this especially happens in cases like
+    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
+    var authInHost = result.host && result.host.indexOf('@') > 0 ?
+                     result.host.split('@') : false;
+    if (authInHost) {
+      result.auth = authInHost.shift();
+      result.host = result.hostname = authInHost.shift();
+    }
+  }
+
+  mustEndAbs = mustEndAbs || (result.host && srcPath.length);
+
+  if (mustEndAbs && !isAbsolute) {
+    srcPath.unshift('');
+  }
+
+  if (!srcPath.length) {
+    result.pathname = null;
+    result.path = null;
+  } else {
+    result.pathname = srcPath.join('/');
+  }
+
+  //to support request.http
+  if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
+    result.path = (result.pathname ? result.pathname : '') +
+                  (result.search ? result.search : '');
+  }
+  result.auth = relative.auth || result.auth;
+  result.slashes = result.slashes || relative.slashes;
+  result.href = result.format();
+  return result;
+};
+
+Url.prototype.parseHost = function() {
+  var host = this.host;
+  var port = portPattern.exec(host);
+  if (port) {
+    port = port[0];
+    if (port !== ':') {
+      this.port = port.substr(1);
+    }
+    host = host.substr(0, host.length - port.length);
+  }
+  if (host) this.hostname = host;
+};
+
+var url = {
+	parse: parse,
+	resolve: resolve,
+	resolveObject: resolveObject,
+	format: format,
+	Url: Url_1
+};
+
 var adapter = axios.defaults.adapter;
 
 axios.defaults.adapter = function () {
@@ -25,19 +1436,27 @@ axios.defaults.adapter = function () {
 }();
 
 var createReq = function (endpoint, service, getHeaderSign) {
+  var _ref = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {},
+      proxy = _ref.proxy;
+
   var req = axios.create({
     baseURL: endpoint + '/' + service.serviceName,
-    maxRedirects: 0
+    maxRedirects: 0,
+    proxy: proxy
   });
 
   req.interceptors.request.use(function (config) {
     var method = config.method.toUpperCase();
-    var path = config.url;
-    if (config.url.indexOf(config.baseURL) === 0) {
-      path = config.url.substring(config.baseURL.length);
+    var path = url.resolve('/', config.url || '');
+
+    if (path.indexOf(config.baseURL) === 0) {
+      path = path.substring(config.baseURL.length);
     }
     config.url = encodeURI(config.url);
-    return getHeaderSign(service, method, path, config.headers['Content-MD5']).then(function (headers) {
+    var headerSign = getHeaderSign(service, method, path, config.headers['Content-MD5']);
+    headerSign = isPromise_1(headerSign) ? headerSign : Promise.resolve(headerSign);
+
+    return headerSign.then(function (headers) {
       config.headers.common = headers;
       return Promise.resolve(config);
     });
@@ -149,16 +1568,6 @@ function b64_hmac_sha1(k,d,_p,_z){
 }
 var hmacsha1 = b64_hmac_sha1;
 
-var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
-
-
-
-
-
-function createCommonjsModule(fn, module) {
-	return module = { exports: {} }, fn(module, module.exports), module.exports;
-}
-
 var base64 = createCommonjsModule(function (module, exports) {
 /*! http://mths.be/base64 v0.1.0 by @mathias | MIT license */
 (function(root) {
@@ -328,7 +1737,7 @@ var base64 = createCommonjsModule(function (module, exports) {
 });
 
 var name = "upyun";
-var version = "3.3.8";
+var version = "3.3.9";
 var description = "UPYUN js sdk";
 var main = "dist/upyun.common.js";
 var module$1 = "dist/upyun.esm.js";
@@ -341,8 +1750,8 @@ var license = "MIT";
 var bugs = { "url": "https://github.com/upyun/node-sdk/issues" };
 var homepage = "https://github.com/upyun/node-sdk";
 var contributors = [{ "name": "yejingx", "email": "yejingx@gmail.com" }, { "name": "Leigh", "email": "i@zhuli.me" }, { "name": "kaidiren", "email": "kaidiren@gmail.com" }, { "name": "Gaara", "email": "sabakugaara@users.noreply.github.com" }];
-var devDependencies = { "babel-cli": "^6.24.1", "babel-loader": "^7.0.0", "babel-plugin-external-helpers": "^6.22.0", "babel-plugin-transform-runtime": "^6.23.0", "babel-preset-env": "^1.4.0", "babel-register": "^6.24.1", "chai": "^3.5.0", "eslint": "^5.16.0", "istanbul": "^0.4.3", "karma": "^1.7.0", "karma-chrome-launcher": "^2.1.1", "karma-mocha": "^1.3.0", "karma-sourcemap-loader": "^0.3.7", "karma-webpack": "^2.0.3", "mocha": "^3.4.1", "rollup": "^0.41.6", "rollup-plugin-alias": "^1.3.1", "rollup-plugin-babel": "^2.7.1", "rollup-plugin-commonjs": "^8.0.2", "rollup-plugin-json": "^2.1.1", "rollup-plugin-node-resolve": "^3.0.0", "should": "^9.0.2", "uglify-js": "^3.0.11", "webpack": "^2.5.1" };
-var dependencies = { "axios": "^0.16.1", "base-64": "^0.1.0", "form-data": "^2.1.4", "hmacsha1": "^1.0.0", "md5": "^2.2.1", "mime-types": "^2.1.15" };
+var devDependencies = { "babel-cli": "^6.24.1", "babel-loader": "^7.0.0", "babel-plugin-external-helpers": "^6.22.0", "babel-plugin-transform-runtime": "^6.23.0", "babel-preset-env": "^1.4.0", "babel-register": "^6.24.1", "chai": "^3.5.0", "delay": "^4.2.0", "eslint": "^5.16.0", "istanbul": "^0.4.3", "karma": "^1.7.0", "karma-chrome-launcher": "^2.1.1", "karma-mocha": "^1.3.0", "karma-sourcemap-loader": "^0.3.7", "karma-webpack": "^2.0.3", "mocha": "^3.4.1", "rollup": "^0.41.6", "rollup-plugin-alias": "^1.3.1", "rollup-plugin-babel": "^2.7.1", "rollup-plugin-commonjs": "^8.0.2", "rollup-plugin-json": "^2.1.1", "rollup-plugin-node-resolve": "^3.0.0", "should": "^9.0.2", "uglify-js": "^3.0.11", "webpack": "^2.5.1" };
+var dependencies = { "axios": "^0.18.0", "base-64": "^0.1.0", "form-data": "^2.1.4", "hmacsha1": "^1.0.0", "is-promise": "^2.1.0", "md5": "^2.2.1", "mime-types": "^2.1.15" };
 var browser = { "./upyun/utils.js": "./upyun/browser-utils.js", "./upyun/form-upload.js": "./upyun/browser-form-upload.js" };
 var pkg = {
 	name: name,
@@ -749,7 +2158,8 @@ function getPolicyAndAuthorization(service, params) {
   var authorization = genSign(service, {
     method: 'POST',
     path: '/' + service.serviceName,
-    policy: policy
+    policy: policy,
+    contentMd5: params['content-md5']
   });
   return {
     policy: policy,
@@ -899,10 +2309,14 @@ var Upyun = function () {
     var config = Object.assign({
       domain: 'v0.api.upyun.com',
       protocol: 'https'
+      // proxy: false // 禁用代理 // 参考 axios 配置. 如: {host: '127.0.0.1', post: 1081}
     }, params);
+
     this.endpoint = config.protocol + '://' + config.domain;
+    var proxy = config.proxy;
 
-    this.req = createReq(this.endpoint, service, getHeaderSign$$1 || defaultGetHeaderSign);
+    this.proxy = proxy;
+    this.req = createReq(this.endpoint, service, getHeaderSign$$1 || defaultGetHeaderSign, { proxy: proxy });
     // NOTE this will be removed
     this.bucket = service;
     this.service = service;
@@ -1437,7 +2851,33 @@ var Upyun = function () {
     value: function formPutFile(remotePath, localFile) {
       var _this4 = this;
 
-      var params = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
+      var orignParams = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
+
+      var params = {};
+      var _iteratorNormalCompletion3 = true;
+      var _didIteratorError3 = false;
+      var _iteratorError3 = undefined;
+
+      try {
+        for (var _iterator3 = Object.keys(orignParams)[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
+          var key = _step3.value;
+
+          params[key.toLowerCase()] = orignParams[key];
+        }
+      } catch (err) {
+        _didIteratorError3 = true;
+        _iteratorError3 = err;
+      } finally {
+        try {
+          if (!_iteratorNormalCompletion3 && _iterator3.return) {
+            _iterator3.return();
+          }
+        } finally {
+          if (_didIteratorError3) {
+            throw _iteratorError3;
+          }
+        }
+      }
 
       if (typeof this.bodySignCallback !== 'function') {
         throw new Error('upyun - must setBodySignCallback first!');
@@ -1446,14 +2886,10 @@ var Upyun = function () {
       params['service'] = this.service.serviceName;
       params['save-key'] = remotePath;
       var result = this.bodySignCallback(this.service, params);
-      if (typeof result.then !== 'function') {
-        result = Promise.resolve(result);
-      }
+      result = isPromise_1(result) ? result : Promise.resolve(result);
 
       return result.then(function (bodySign) {
-        return formUpload(_this4.endpoint + '/' + params['service'], localFile, bodySign).then(function (result) {
-          return Promise.resolve(result);
-        });
+        return formUpload(_this4.endpoint + '/' + params['service'], localFile, bodySign);
       });
     }
   }, {
@@ -1464,7 +2900,8 @@ var Upyun = function () {
       }
       var headers = sign.getPurgeHeaderSign(this.service, urls);
       return axios.post('http://purge.upyun.com/purge/', 'purge=' + urls.join('\n'), {
-        headers: headers
+        headers: headers,
+        proxy: this.proxy
       }).then(function (_ref16) {
         var data = _ref16.data;
 
@@ -1486,33 +2923,32 @@ function isMeta(key) {
 }
 
 function defaultGetHeaderSign() {
-  var headers = sign.getHeaderSign.apply(sign, arguments);
-  return Promise.resolve(headers);
+  return sign.getHeaderSign.apply(sign, arguments);
 }
 
 function key2LowerCase(obj) {
   var objLower = {};
-  var _iteratorNormalCompletion3 = true;
-  var _didIteratorError3 = false;
-  var _iteratorError3 = undefined;
+  var _iteratorNormalCompletion4 = true;
+  var _didIteratorError4 = false;
+  var _iteratorError4 = undefined;
 
   try {
-    for (var _iterator3 = Object.keys(obj)[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
-      var key = _step3.value;
+    for (var _iterator4 = Object.keys(obj)[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
+      var key = _step4.value;
 
       objLower[key.toLowerCase()] = obj[key];
     }
   } catch (err) {
-    _didIteratorError3 = true;
-    _iteratorError3 = err;
+    _didIteratorError4 = true;
+    _iteratorError4 = err;
   } finally {
     try {
-      if (!_iteratorNormalCompletion3 && _iterator3.return) {
-        _iterator3.return();
+      if (!_iteratorNormalCompletion4 && _iterator4.return) {
+        _iterator4.return();
       }
     } finally {
-      if (_didIteratorError3) {
-        throw _iteratorError3;
+      if (_didIteratorError4) {
+        throw _iteratorError4;
       }
     }
   }
diff --git a/dist/upyun.js b/dist/upyun.js
index f554aba..7120e0b 100644
--- a/dist/upyun.js
+++ b/dist/upyun.js
@@ -1,5 +1,5 @@
 /**
-  * UPYUN js-sdk 3.3.8
+  * UPYUN js-sdk 3.3.9
   * (c) 2019
   * @license MIT
   */
@@ -18,6 +18,1417 @@ var isBrowser = typeof window !== 'undefined' && (typeof process === 'undefined'
 
 var PARTSIZE = 1024 * 1024;
 
+var isPromise_1 = isPromise;
+
+function isPromise(obj) {
+  return !!obj && (typeof obj === 'object' || typeof obj === 'function') && typeof obj.then === 'function';
+}
+
+var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
+
+
+
+
+
+function createCommonjsModule(fn, module) {
+	return module = { exports: {} }, fn(module, module.exports), module.exports;
+}
+
+var punycode = createCommonjsModule(function (module, exports) {
+/*! https://mths.be/punycode v1.3.2 by @mathias */
+(function(root) {
+
+	/** Detect free variables */
+	var freeExports = 'object' == 'object' && exports &&
+		!exports.nodeType && exports;
+	var freeModule = 'object' == 'object' && module &&
+		!module.nodeType && module;
+	var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal;
+	if (
+		freeGlobal.global === freeGlobal ||
+		freeGlobal.window === freeGlobal ||
+		freeGlobal.self === freeGlobal
+	) {
+		root = freeGlobal;
+	}
+
+	/**
+	 * The `punycode` object.
+	 * @name punycode
+	 * @type Object
+	 */
+	var punycode,
+
+	/** Highest positive signed 32-bit float value */
+	maxInt = 2147483647, // aka. 0x7FFFFFFF or 2^31-1
+
+	/** Bootstring parameters */
+	base = 36,
+	tMin = 1,
+	tMax = 26,
+	skew = 38,
+	damp = 700,
+	initialBias = 72,
+	initialN = 128, // 0x80
+	delimiter = '-', // '\x2D'
+
+	/** Regular expressions */
+	regexPunycode = /^xn--/,
+	regexNonASCII = /[^\x20-\x7E]/, // unprintable ASCII chars + non-ASCII chars
+	regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g, // RFC 3490 separators
+
+	/** Error messages */
+	errors = {
+		'overflow': 'Overflow: input needs wider integers to process',
+		'not-basic': 'Illegal input >= 0x80 (not a basic code point)',
+		'invalid-input': 'Invalid input'
+	},
+
+	/** Convenience shortcuts */
+	baseMinusTMin = base - tMin,
+	floor = Math.floor,
+	stringFromCharCode = String.fromCharCode,
+
+	/** Temporary variable */
+	key;
+
+	/*--------------------------------------------------------------------------*/
+
+	/**
+	 * A generic error utility function.
+	 * @private
+	 * @param {String} type The error type.
+	 * @returns {Error} Throws a `RangeError` with the applicable error message.
+	 */
+	function error(type) {
+		throw RangeError(errors[type]);
+	}
+
+	/**
+	 * A generic `Array#map` utility function.
+	 * @private
+	 * @param {Array} array The array to iterate over.
+	 * @param {Function} callback The function that gets called for every array
+	 * item.
+	 * @returns {Array} A new array of values returned by the callback function.
+	 */
+	function map(array, fn) {
+		var length = array.length;
+		var result = [];
+		while (length--) {
+			result[length] = fn(array[length]);
+		}
+		return result;
+	}
+
+	/**
+	 * A simple `Array#map`-like wrapper to work with domain name strings or email
+	 * addresses.
+	 * @private
+	 * @param {String} domain The domain name or email address.
+	 * @param {Function} callback The function that gets called for every
+	 * character.
+	 * @returns {Array} A new string of characters returned by the callback
+	 * function.
+	 */
+	function mapDomain(string, fn) {
+		var parts = string.split('@');
+		var result = '';
+		if (parts.length > 1) {
+			// In email addresses, only the domain name should be punycoded. Leave
+			// the local part (i.e. everything up to `@`) intact.
+			result = parts[0] + '@';
+			string = parts[1];
+		}
+		// Avoid `split(regex)` for IE8 compatibility. See #17.
+		string = string.replace(regexSeparators, '\x2E');
+		var labels = string.split('.');
+		var encoded = map(labels, fn).join('.');
+		return result + encoded;
+	}
+
+	/**
+	 * Creates an array containing the numeric code points of each Unicode
+	 * character in the string. While JavaScript uses UCS-2 internally,
+	 * this function will convert a pair of surrogate halves (each of which
+	 * UCS-2 exposes as separate characters) into a single code point,
+	 * matching UTF-16.
+	 * @see `punycode.ucs2.encode`
+	 * @see <https://mathiasbynens.be/notes/javascript-encoding>
+	 * @memberOf punycode.ucs2
+	 * @name decode
+	 * @param {String} string The Unicode input string (UCS-2).
+	 * @returns {Array} The new array of code points.
+	 */
+	function ucs2decode(string) {
+		var output = [],
+		    counter = 0,
+		    length = string.length,
+		    value,
+		    extra;
+		while (counter < length) {
+			value = string.charCodeAt(counter++);
+			if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
+				// high surrogate, and there is a next character
+				extra = string.charCodeAt(counter++);
+				if ((extra & 0xFC00) == 0xDC00) { // low surrogate
+					output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
+				} else {
+					// unmatched surrogate; only append this code unit, in case the next
+					// code unit is the high surrogate of a surrogate pair
+					output.push(value);
+					counter--;
+				}
+			} else {
+				output.push(value);
+			}
+		}
+		return output;
+	}
+
+	/**
+	 * Creates a string based on an array of numeric code points.
+	 * @see `punycode.ucs2.decode`
+	 * @memberOf punycode.ucs2
+	 * @name encode
+	 * @param {Array} codePoints The array of numeric code points.
+	 * @returns {String} The new Unicode string (UCS-2).
+	 */
+	function ucs2encode(array) {
+		return map(array, function(value) {
+			var output = '';
+			if (value > 0xFFFF) {
+				value -= 0x10000;
+				output += stringFromCharCode(value >>> 10 & 0x3FF | 0xD800);
+				value = 0xDC00 | value & 0x3FF;
+			}
+			output += stringFromCharCode(value);
+			return output;
+		}).join('');
+	}
+
+	/**
+	 * Converts a basic code point into a digit/integer.
+	 * @see `digitToBasic()`
+	 * @private
+	 * @param {Number} codePoint The basic numeric code point value.
+	 * @returns {Number} The numeric value of a basic code point (for use in
+	 * representing integers) in the range `0` to `base - 1`, or `base` if
+	 * the code point does not represent a value.
+	 */
+	function basicToDigit(codePoint) {
+		if (codePoint - 48 < 10) {
+			return codePoint - 22;
+		}
+		if (codePoint - 65 < 26) {
+			return codePoint - 65;
+		}
+		if (codePoint - 97 < 26) {
+			return codePoint - 97;
+		}
+		return base;
+	}
+
+	/**
+	 * Converts a digit/integer into a basic code point.
+	 * @see `basicToDigit()`
+	 * @private
+	 * @param {Number} digit The numeric value of a basic code point.
+	 * @returns {Number} The basic code point whose value (when used for
+	 * representing integers) is `digit`, which needs to be in the range
+	 * `0` to `base - 1`. If `flag` is non-zero, the uppercase form is
+	 * used; else, the lowercase form is used. The behavior is undefined
+	 * if `flag` is non-zero and `digit` has no uppercase form.
+	 */
+	function digitToBasic(digit, flag) {
+		//  0..25 map to ASCII a..z or A..Z
+		// 26..35 map to ASCII 0..9
+		return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
+	}
+
+	/**
+	 * Bias adaptation function as per section 3.4 of RFC 3492.
+	 * http://tools.ietf.org/html/rfc3492#section-3.4
+	 * @private
+	 */
+	function adapt(delta, numPoints, firstTime) {
+		var k = 0;
+		delta = firstTime ? floor(delta / damp) : delta >> 1;
+		delta += floor(delta / numPoints);
+		for (/* no initialization */; delta > baseMinusTMin * tMax >> 1; k += base) {
+			delta = floor(delta / baseMinusTMin);
+		}
+		return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
+	}
+
+	/**
+	 * Converts a Punycode string of ASCII-only symbols to a string of Unicode
+	 * symbols.
+	 * @memberOf punycode
+	 * @param {String} input The Punycode string of ASCII-only symbols.
+	 * @returns {String} The resulting string of Unicode symbols.
+	 */
+	function decode(input) {
+		// Don't use UCS-2
+		var output = [],
+		    inputLength = input.length,
+		    out,
+		    i = 0,
+		    n = initialN,
+		    bias = initialBias,
+		    basic,
+		    j,
+		    index,
+		    oldi,
+		    w,
+		    k,
+		    digit,
+		    t,
+		    /** Cached calculation results */
+		    baseMinusT;
+
+		// Handle the basic code points: let `basic` be the number of input code
+		// points before the last delimiter, or `0` if there is none, then copy
+		// the first basic code points to the output.
+
+		basic = input.lastIndexOf(delimiter);
+		if (basic < 0) {
+			basic = 0;
+		}
+
+		for (j = 0; j < basic; ++j) {
+			// if it's not a basic code point
+			if (input.charCodeAt(j) >= 0x80) {
+				error('not-basic');
+			}
+			output.push(input.charCodeAt(j));
+		}
+
+		// Main decoding loop: start just after the last delimiter if any basic code
+		// points were copied; start at the beginning otherwise.
+
+		for (index = basic > 0 ? basic + 1 : 0; index < inputLength; /* no final expression */) {
+
+			// `index` is the index of the next character to be consumed.
+			// Decode a generalized variable-length integer into `delta`,
+			// which gets added to `i`. The overflow checking is easier
+			// if we increase `i` as we go, then subtract off its starting
+			// value at the end to obtain `delta`.
+			for (oldi = i, w = 1, k = base; /* no condition */; k += base) {
+
+				if (index >= inputLength) {
+					error('invalid-input');
+				}
+
+				digit = basicToDigit(input.charCodeAt(index++));
+
+				if (digit >= base || digit > floor((maxInt - i) / w)) {
+					error('overflow');
+				}
+
+				i += digit * w;
+				t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+
+				if (digit < t) {
+					break;
+				}
+
+				baseMinusT = base - t;
+				if (w > floor(maxInt / baseMinusT)) {
+					error('overflow');
+				}
+
+				w *= baseMinusT;
+
+			}
+
+			out = output.length + 1;
+			bias = adapt(i - oldi, out, oldi == 0);
+
+			// `i` was supposed to wrap around from `out` to `0`,
+			// incrementing `n` each time, so we'll fix that now:
+			if (floor(i / out) > maxInt - n) {
+				error('overflow');
+			}
+
+			n += floor(i / out);
+			i %= out;
+
+			// Insert `n` at position `i` of the output
+			output.splice(i++, 0, n);
+
+		}
+
+		return ucs2encode(output);
+	}
+
+	/**
+	 * Converts a string of Unicode symbols (e.g. a domain name label) to a
+	 * Punycode string of ASCII-only symbols.
+	 * @memberOf punycode
+	 * @param {String} input The string of Unicode symbols.
+	 * @returns {String} The resulting Punycode string of ASCII-only symbols.
+	 */
+	function encode(input) {
+		var n,
+		    delta,
+		    handledCPCount,
+		    basicLength,
+		    bias,
+		    j,
+		    m,
+		    q,
+		    k,
+		    t,
+		    currentValue,
+		    output = [],
+		    /** `inputLength` will hold the number of code points in `input`. */
+		    inputLength,
+		    /** Cached calculation results */
+		    handledCPCountPlusOne,
+		    baseMinusT,
+		    qMinusT;
+
+		// Convert the input in UCS-2 to Unicode
+		input = ucs2decode(input);
+
+		// Cache the length
+		inputLength = input.length;
+
+		// Initialize the state
+		n = initialN;
+		delta = 0;
+		bias = initialBias;
+
+		// Handle the basic code points
+		for (j = 0; j < inputLength; ++j) {
+			currentValue = input[j];
+			if (currentValue < 0x80) {
+				output.push(stringFromCharCode(currentValue));
+			}
+		}
+
+		handledCPCount = basicLength = output.length;
+
+		// `handledCPCount` is the number of code points that have been handled;
+		// `basicLength` is the number of basic code points.
+
+		// Finish the basic string - if it is not empty - with a delimiter
+		if (basicLength) {
+			output.push(delimiter);
+		}
+
+		// Main encoding loop:
+		while (handledCPCount < inputLength) {
+
+			// All non-basic code points < n have been handled already. Find the next
+			// larger one:
+			for (m = maxInt, j = 0; j < inputLength; ++j) {
+				currentValue = input[j];
+				if (currentValue >= n && currentValue < m) {
+					m = currentValue;
+				}
+			}
+
+			// Increase `delta` enough to advance the decoder's <n,i> state to <m,0>,
+			// but guard against overflow
+			handledCPCountPlusOne = handledCPCount + 1;
+			if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
+				error('overflow');
+			}
+
+			delta += (m - n) * handledCPCountPlusOne;
+			n = m;
+
+			for (j = 0; j < inputLength; ++j) {
+				currentValue = input[j];
+
+				if (currentValue < n && ++delta > maxInt) {
+					error('overflow');
+				}
+
+				if (currentValue == n) {
+					// Represent delta as a generalized variable-length integer
+					for (q = delta, k = base; /* no condition */; k += base) {
+						t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+						if (q < t) {
+							break;
+						}
+						qMinusT = q - t;
+						baseMinusT = base - t;
+						output.push(
+							stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0))
+						);
+						q = floor(qMinusT / baseMinusT);
+					}
+
+					output.push(stringFromCharCode(digitToBasic(q, 0)));
+					bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+					delta = 0;
+					++handledCPCount;
+				}
+			}
+
+			++delta;
+			++n;
+
+		}
+		return output.join('');
+	}
+
+	/**
+	 * Converts a Punycode string representing a domain name or an email address
+	 * to Unicode. Only the Punycoded parts of the input will be converted, i.e.
+	 * it doesn't matter if you call it on a string that has already been
+	 * converted to Unicode.
+	 * @memberOf punycode
+	 * @param {String} input The Punycoded domain name or email address to
+	 * convert to Unicode.
+	 * @returns {String} The Unicode representation of the given Punycode
+	 * string.
+	 */
+	function toUnicode(input) {
+		return mapDomain(input, function(string) {
+			return regexPunycode.test(string)
+				? decode(string.slice(4).toLowerCase())
+				: string;
+		});
+	}
+
+	/**
+	 * Converts a Unicode string representing a domain name or an email address to
+	 * Punycode. Only the non-ASCII parts of the domain name will be converted,
+	 * i.e. it doesn't matter if you call it with a domain that's already in
+	 * ASCII.
+	 * @memberOf punycode
+	 * @param {String} input The domain name or email address to convert, as a
+	 * Unicode string.
+	 * @returns {String} The Punycode representation of the given domain name or
+	 * email address.
+	 */
+	function toASCII(input) {
+		return mapDomain(input, function(string) {
+			return regexNonASCII.test(string)
+				? 'xn--' + encode(string)
+				: string;
+		});
+	}
+
+	/*--------------------------------------------------------------------------*/
+
+	/** Define the public API */
+	punycode = {
+		/**
+		 * A string representing the current Punycode.js version number.
+		 * @memberOf punycode
+		 * @type String
+		 */
+		'version': '1.3.2',
+		/**
+		 * An object of methods to convert from JavaScript's internal character
+		 * representation (UCS-2) to Unicode code points, and back.
+		 * @see <https://mathiasbynens.be/notes/javascript-encoding>
+		 * @memberOf punycode
+		 * @type Object
+		 */
+		'ucs2': {
+			'decode': ucs2decode,
+			'encode': ucs2encode
+		},
+		'decode': decode,
+		'encode': encode,
+		'toASCII': toASCII,
+		'toUnicode': toUnicode
+	};
+
+	/** Expose `punycode` */
+	// Some AMD build optimizers, like r.js, check for specific condition patterns
+	// like the following:
+	if (
+		typeof undefined == 'function' &&
+		typeof undefined.amd == 'object' &&
+		undefined.amd
+	) {
+		undefined('punycode', function() {
+			return punycode;
+		});
+	} else if (freeExports && freeModule) {
+		if (module.exports == freeExports) { // in Node.js or RingoJS v0.8.0+
+			freeModule.exports = punycode;
+		} else { // in Narwhal or RingoJS v0.7.0-
+			for (key in punycode) {
+				punycode.hasOwnProperty(key) && (freeExports[key] = punycode[key]);
+			}
+		}
+	} else { // in Rhino or a web browser
+		root.punycode = punycode;
+	}
+
+}(commonjsGlobal));
+});
+
+var util = {
+  isString: function(arg) {
+    return typeof(arg) === 'string';
+  },
+  isObject: function(arg) {
+    return typeof(arg) === 'object' && arg !== null;
+  },
+  isNull: function(arg) {
+    return arg === null;
+  },
+  isNullOrUndefined: function(arg) {
+    return arg == null;
+  }
+};
+
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// If obj.hasOwnProperty has been overridden, then calling
+// obj.hasOwnProperty(prop) will break.
+// See: https://github.com/joyent/node/issues/1707
+function hasOwnProperty(obj, prop) {
+  return Object.prototype.hasOwnProperty.call(obj, prop);
+}
+
+var decode = function(qs, sep, eq, options) {
+  sep = sep || '&';
+  eq = eq || '=';
+  var obj = {};
+
+  if (typeof qs !== 'string' || qs.length === 0) {
+    return obj;
+  }
+
+  var regexp = /\+/g;
+  qs = qs.split(sep);
+
+  var maxKeys = 1000;
+  if (options && typeof options.maxKeys === 'number') {
+    maxKeys = options.maxKeys;
+  }
+
+  var len = qs.length;
+  // maxKeys <= 0 means that we should not limit keys count
+  if (maxKeys > 0 && len > maxKeys) {
+    len = maxKeys;
+  }
+
+  for (var i = 0; i < len; ++i) {
+    var x = qs[i].replace(regexp, '%20'),
+        idx = x.indexOf(eq),
+        kstr, vstr, k, v;
+
+    if (idx >= 0) {
+      kstr = x.substr(0, idx);
+      vstr = x.substr(idx + 1);
+    } else {
+      kstr = x;
+      vstr = '';
+    }
+
+    k = decodeURIComponent(kstr);
+    v = decodeURIComponent(vstr);
+
+    if (!hasOwnProperty(obj, k)) {
+      obj[k] = v;
+    } else if (Array.isArray(obj[k])) {
+      obj[k].push(v);
+    } else {
+      obj[k] = [obj[k], v];
+    }
+  }
+
+  return obj;
+};
+
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var stringifyPrimitive = function(v) {
+  switch (typeof v) {
+    case 'string':
+      return v;
+
+    case 'boolean':
+      return v ? 'true' : 'false';
+
+    case 'number':
+      return isFinite(v) ? v : '';
+
+    default:
+      return '';
+  }
+};
+
+var encode = function(obj, sep, eq, name) {
+  sep = sep || '&';
+  eq = eq || '=';
+  if (obj === null) {
+    obj = undefined;
+  }
+
+  if (typeof obj === 'object') {
+    return Object.keys(obj).map(function(k) {
+      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;
+      if (Array.isArray(obj[k])) {
+        return obj[k].map(function(v) {
+          return ks + encodeURIComponent(stringifyPrimitive(v));
+        }).join(sep);
+      } else {
+        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));
+      }
+    }).join(sep);
+
+  }
+
+  if (!name) return '';
+  return encodeURIComponent(stringifyPrimitive(name)) + eq +
+         encodeURIComponent(stringifyPrimitive(obj));
+};
+
+var querystring = createCommonjsModule(function (module, exports) {
+'use strict';
+
+exports.decode = exports.parse = decode;
+exports.encode = exports.stringify = encode;
+});
+
+var parse = urlParse;
+var resolve = urlResolve;
+var resolveObject = urlResolveObject;
+var format = urlFormat;
+
+var Url_1 = Url;
+
+function Url() {
+  this.protocol = null;
+  this.slashes = null;
+  this.auth = null;
+  this.host = null;
+  this.port = null;
+  this.hostname = null;
+  this.hash = null;
+  this.search = null;
+  this.query = null;
+  this.pathname = null;
+  this.path = null;
+  this.href = null;
+}
+
+// Reference: RFC 3986, RFC 1808, RFC 2396
+
+// define these here so at least they only have to be
+// compiled once on the first module load.
+var protocolPattern = /^([a-z0-9.+-]+:)/i;
+var portPattern = /:[0-9]*$/;
+var simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/;
+var delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'];
+var unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims);
+var autoEscape = ['\''].concat(unwise);
+var nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape);
+var hostEndingChars = ['/', '?', '#'];
+var hostnameMaxLen = 255;
+var hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/;
+var hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/;
+var unsafeProtocol = {
+      'javascript': true,
+      'javascript:': true
+    };
+var hostlessProtocol = {
+      'javascript': true,
+      'javascript:': true
+    };
+var slashedProtocol = {
+      'http': true,
+      'https': true,
+      'ftp': true,
+      'gopher': true,
+      'file': true,
+      'http:': true,
+      'https:': true,
+      'ftp:': true,
+      'gopher:': true,
+      'file:': true
+    };
+
+function urlParse(url, parseQueryString, slashesDenoteHost) {
+  if (url && util.isObject(url) && url instanceof Url) return url;
+
+  var u = new Url;
+  u.parse(url, parseQueryString, slashesDenoteHost);
+  return u;
+}
+
+Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
+  if (!util.isString(url)) {
+    throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
+  }
+
+  // Copy chrome, IE, opera backslash-handling behavior.
+  // Back slashes before the query string get converted to forward slashes
+  // See: https://code.google.com/p/chromium/issues/detail?id=25916
+  var queryIndex = url.indexOf('?'),
+      splitter =
+          (queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',
+      uSplit = url.split(splitter),
+      slashRegex = /\\/g;
+  uSplit[0] = uSplit[0].replace(slashRegex, '/');
+  url = uSplit.join(splitter);
+
+  var rest = url;
+
+  // trim before proceeding.
+  // This is to support parse stuff like "  http://foo.com  \n"
+  rest = rest.trim();
+
+  if (!slashesDenoteHost && url.split('#').length === 1) {
+    // Try fast path regexp
+    var simplePath = simplePathPattern.exec(rest);
+    if (simplePath) {
+      this.path = rest;
+      this.href = rest;
+      this.pathname = simplePath[1];
+      if (simplePath[2]) {
+        this.search = simplePath[2];
+        if (parseQueryString) {
+          this.query = querystring.parse(this.search.substr(1));
+        } else {
+          this.query = this.search.substr(1);
+        }
+      } else if (parseQueryString) {
+        this.search = '';
+        this.query = {};
+      }
+      return this;
+    }
+  }
+
+  var proto = protocolPattern.exec(rest);
+  if (proto) {
+    proto = proto[0];
+    var lowerProto = proto.toLowerCase();
+    this.protocol = lowerProto;
+    rest = rest.substr(proto.length);
+  }
+
+  // figure out if it's got a host
+  // user@server is *always* interpreted as a hostname, and url
+  // resolution will treat //foo/bar as host=foo,path=bar because that's
+  // how the browser resolves relative URLs.
+  if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
+    var slashes = rest.substr(0, 2) === '//';
+    if (slashes && !(proto && hostlessProtocol[proto])) {
+      rest = rest.substr(2);
+      this.slashes = true;
+    }
+  }
+
+  if (!hostlessProtocol[proto] &&
+      (slashes || (proto && !slashedProtocol[proto]))) {
+
+    // there's a hostname.
+    // the first instance of /, ?, ;, or # ends the host.
+    //
+    // If there is an @ in the hostname, then non-host chars *are* allowed
+    // to the left of the last @ sign, unless some host-ending character
+    // comes *before* the @-sign.
+    // URLs are obnoxious.
+    //
+    // ex:
+    // http://a@b@c/ => user:a@b host:c
+    // http://a@b?@c => user:a host:c path:/?@c
+
+    // v0.12 TODO(isaacs): This is not quite how Chrome does things.
+    // Review our test case against browsers more comprehensively.
+
+    // find the first instance of any hostEndingChars
+    var hostEnd = -1;
+    for (var i = 0; i < hostEndingChars.length; i++) {
+      var hec = rest.indexOf(hostEndingChars[i]);
+      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
+        hostEnd = hec;
+    }
+
+    // at this point, either we have an explicit point where the
+    // auth portion cannot go past, or the last @ char is the decider.
+    var auth, atSign;
+    if (hostEnd === -1) {
+      // atSign can be anywhere.
+      atSign = rest.lastIndexOf('@');
+    } else {
+      // atSign must be in auth portion.
+      // http://a@b/c@d => host:b auth:a path:/c@d
+      atSign = rest.lastIndexOf('@', hostEnd);
+    }
+
+    // Now we have a portion which is definitely the auth.
+    // Pull that off.
+    if (atSign !== -1) {
+      auth = rest.slice(0, atSign);
+      rest = rest.slice(atSign + 1);
+      this.auth = decodeURIComponent(auth);
+    }
+
+    // the host is the remaining to the left of the first non-host char
+    hostEnd = -1;
+    for (var i = 0; i < nonHostChars.length; i++) {
+      var hec = rest.indexOf(nonHostChars[i]);
+      if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
+        hostEnd = hec;
+    }
+    // if we still have not hit it, then the entire thing is a host.
+    if (hostEnd === -1)
+      hostEnd = rest.length;
+
+    this.host = rest.slice(0, hostEnd);
+    rest = rest.slice(hostEnd);
+
+    // pull out port.
+    this.parseHost();
+
+    // we've indicated that there is a hostname,
+    // so even if it's empty, it has to be present.
+    this.hostname = this.hostname || '';
+
+    // if hostname begins with [ and ends with ]
+    // assume that it's an IPv6 address.
+    var ipv6Hostname = this.hostname[0] === '[' &&
+        this.hostname[this.hostname.length - 1] === ']';
+
+    // validate a little.
+    if (!ipv6Hostname) {
+      var hostparts = this.hostname.split(/\./);
+      for (var i = 0, l = hostparts.length; i < l; i++) {
+        var part = hostparts[i];
+        if (!part) continue;
+        if (!part.match(hostnamePartPattern)) {
+          var newpart = '';
+          for (var j = 0, k = part.length; j < k; j++) {
+            if (part.charCodeAt(j) > 127) {
+              // we replace non-ASCII char with a temporary placeholder
+              // we need this to make sure size of hostname is not
+              // broken by replacing non-ASCII by nothing
+              newpart += 'x';
+            } else {
+              newpart += part[j];
+            }
+          }
+          // we test again with ASCII char only
+          if (!newpart.match(hostnamePartPattern)) {
+            var validParts = hostparts.slice(0, i);
+            var notHost = hostparts.slice(i + 1);
+            var bit = part.match(hostnamePartStart);
+            if (bit) {
+              validParts.push(bit[1]);
+              notHost.unshift(bit[2]);
+            }
+            if (notHost.length) {
+              rest = '/' + notHost.join('.') + rest;
+            }
+            this.hostname = validParts.join('.');
+            break;
+          }
+        }
+      }
+    }
+
+    if (this.hostname.length > hostnameMaxLen) {
+      this.hostname = '';
+    } else {
+      // hostnames are always lower case.
+      this.hostname = this.hostname.toLowerCase();
+    }
+
+    if (!ipv6Hostname) {
+      // IDNA Support: Returns a punycoded representation of "domain".
+      // It only converts parts of the domain name that
+      // have non-ASCII characters, i.e. it doesn't matter if
+      // you call it with a domain that already is ASCII-only.
+      this.hostname = punycode.toASCII(this.hostname);
+    }
+
+    var p = this.port ? ':' + this.port : '';
+    var h = this.hostname || '';
+    this.host = h + p;
+    this.href += this.host;
+
+    // strip [ and ] from the hostname
+    // the host field still retains them, though
+    if (ipv6Hostname) {
+      this.hostname = this.hostname.substr(1, this.hostname.length - 2);
+      if (rest[0] !== '/') {
+        rest = '/' + rest;
+      }
+    }
+  }
+
+  // now rest is set to the post-host stuff.
+  // chop off any delim chars.
+  if (!unsafeProtocol[lowerProto]) {
+
+    // First, make 100% sure that any "autoEscape" chars get
+    // escaped, even if encodeURIComponent doesn't think they
+    // need to be.
+    for (var i = 0, l = autoEscape.length; i < l; i++) {
+      var ae = autoEscape[i];
+      if (rest.indexOf(ae) === -1)
+        continue;
+      var esc = encodeURIComponent(ae);
+      if (esc === ae) {
+        esc = escape(ae);
+      }
+      rest = rest.split(ae).join(esc);
+    }
+  }
+
+
+  // chop off from the tail first.
+  var hash = rest.indexOf('#');
+  if (hash !== -1) {
+    // got a fragment string.
+    this.hash = rest.substr(hash);
+    rest = rest.slice(0, hash);
+  }
+  var qm = rest.indexOf('?');
+  if (qm !== -1) {
+    this.search = rest.substr(qm);
+    this.query = rest.substr(qm + 1);
+    if (parseQueryString) {
+      this.query = querystring.parse(this.query);
+    }
+    rest = rest.slice(0, qm);
+  } else if (parseQueryString) {
+    // no query string, but parseQueryString still requested
+    this.search = '';
+    this.query = {};
+  }
+  if (rest) this.pathname = rest;
+  if (slashedProtocol[lowerProto] &&
+      this.hostname && !this.pathname) {
+    this.pathname = '/';
+  }
+
+  //to support http.request
+  if (this.pathname || this.search) {
+    var p = this.pathname || '';
+    var s = this.search || '';
+    this.path = p + s;
+  }
+
+  // finally, reconstruct the href based on what has been validated.
+  this.href = this.format();
+  return this;
+};
+
+// format a parsed object into a url string
+function urlFormat(obj) {
+  // ensure it's an object, and not a string url.
+  // If it's an obj, this is a no-op.
+  // this way, you can call url_format() on strings
+  // to clean up potentially wonky urls.
+  if (util.isString(obj)) obj = urlParse(obj);
+  if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
+  return obj.format();
+}
+
+Url.prototype.format = function() {
+  var auth = this.auth || '';
+  if (auth) {
+    auth = encodeURIComponent(auth);
+    auth = auth.replace(/%3A/i, ':');
+    auth += '@';
+  }
+
+  var protocol = this.protocol || '',
+      pathname = this.pathname || '',
+      hash = this.hash || '',
+      host = false,
+      query = '';
+
+  if (this.host) {
+    host = auth + this.host;
+  } else if (this.hostname) {
+    host = auth + (this.hostname.indexOf(':') === -1 ?
+        this.hostname :
+        '[' + this.hostname + ']');
+    if (this.port) {
+      host += ':' + this.port;
+    }
+  }
+
+  if (this.query &&
+      util.isObject(this.query) &&
+      Object.keys(this.query).length) {
+    query = querystring.stringify(this.query);
+  }
+
+  var search = this.search || (query && ('?' + query)) || '';
+
+  if (protocol && protocol.substr(-1) !== ':') protocol += ':';
+
+  // only the slashedProtocols get the //.  Not mailto:, xmpp:, etc.
+  // unless they had them to begin with.
+  if (this.slashes ||
+      (!protocol || slashedProtocol[protocol]) && host !== false) {
+    host = '//' + (host || '');
+    if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;
+  } else if (!host) {
+    host = '';
+  }
+
+  if (hash && hash.charAt(0) !== '#') hash = '#' + hash;
+  if (search && search.charAt(0) !== '?') search = '?' + search;
+
+  pathname = pathname.replace(/[?#]/g, function(match) {
+    return encodeURIComponent(match);
+  });
+  search = search.replace('#', '%23');
+
+  return protocol + host + pathname + search + hash;
+};
+
+function urlResolve(source, relative) {
+  return urlParse(source, false, true).resolve(relative);
+}
+
+Url.prototype.resolve = function(relative) {
+  return this.resolveObject(urlParse(relative, false, true)).format();
+};
+
+function urlResolveObject(source, relative) {
+  if (!source) return relative;
+  return urlParse(source, false, true).resolveObject(relative);
+}
+
+Url.prototype.resolveObject = function(relative) {
+  if (util.isString(relative)) {
+    var rel = new Url();
+    rel.parse(relative, false, true);
+    relative = rel;
+  }
+
+  var result = new Url();
+  var tkeys = Object.keys(this);
+  for (var tk = 0; tk < tkeys.length; tk++) {
+    var tkey = tkeys[tk];
+    result[tkey] = this[tkey];
+  }
+
+  // hash is always overridden, no matter what.
+  // even href="" will remove it.
+  result.hash = relative.hash;
+
+  // if the relative url is empty, then there's nothing left to do here.
+  if (relative.href === '') {
+    result.href = result.format();
+    return result;
+  }
+
+  // hrefs like //foo/bar always cut to the protocol.
+  if (relative.slashes && !relative.protocol) {
+    // take everything except the protocol from relative
+    var rkeys = Object.keys(relative);
+    for (var rk = 0; rk < rkeys.length; rk++) {
+      var rkey = rkeys[rk];
+      if (rkey !== 'protocol')
+        result[rkey] = relative[rkey];
+    }
+
+    //urlParse appends trailing / to urls like http://www.example.com
+    if (slashedProtocol[result.protocol] &&
+        result.hostname && !result.pathname) {
+      result.path = result.pathname = '/';
+    }
+
+    result.href = result.format();
+    return result;
+  }
+
+  if (relative.protocol && relative.protocol !== result.protocol) {
+    // if it's a known url protocol, then changing
+    // the protocol does weird things
+    // first, if it's not file:, then we MUST have a host,
+    // and if there was a path
+    // to begin with, then we MUST have a path.
+    // if it is file:, then the host is dropped,
+    // because that's known to be hostless.
+    // anything else is assumed to be absolute.
+    if (!slashedProtocol[relative.protocol]) {
+      var keys = Object.keys(relative);
+      for (var v = 0; v < keys.length; v++) {
+        var k = keys[v];
+        result[k] = relative[k];
+      }
+      result.href = result.format();
+      return result;
+    }
+
+    result.protocol = relative.protocol;
+    if (!relative.host && !hostlessProtocol[relative.protocol]) {
+      var relPath = (relative.pathname || '').split('/');
+      while (relPath.length && !(relative.host = relPath.shift()));
+      if (!relative.host) relative.host = '';
+      if (!relative.hostname) relative.hostname = '';
+      if (relPath[0] !== '') relPath.unshift('');
+      if (relPath.length < 2) relPath.unshift('');
+      result.pathname = relPath.join('/');
+    } else {
+      result.pathname = relative.pathname;
+    }
+    result.search = relative.search;
+    result.query = relative.query;
+    result.host = relative.host || '';
+    result.auth = relative.auth;
+    result.hostname = relative.hostname || relative.host;
+    result.port = relative.port;
+    // to support http.request
+    if (result.pathname || result.search) {
+      var p = result.pathname || '';
+      var s = result.search || '';
+      result.path = p + s;
+    }
+    result.slashes = result.slashes || relative.slashes;
+    result.href = result.format();
+    return result;
+  }
+
+  var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),
+      isRelAbs = (
+          relative.host ||
+          relative.pathname && relative.pathname.charAt(0) === '/'
+      ),
+      mustEndAbs = (isRelAbs || isSourceAbs ||
+                    (result.host && relative.pathname)),
+      removeAllDots = mustEndAbs,
+      srcPath = result.pathname && result.pathname.split('/') || [],
+      relPath = relative.pathname && relative.pathname.split('/') || [],
+      psychotic = result.protocol && !slashedProtocol[result.protocol];
+
+  // if the url is a non-slashed url, then relative
+  // links like ../.. should be able
+  // to crawl up to the hostname, as well.  This is strange.
+  // result.protocol has already been set by now.
+  // Later on, put the first path part into the host field.
+  if (psychotic) {
+    result.hostname = '';
+    result.port = null;
+    if (result.host) {
+      if (srcPath[0] === '') srcPath[0] = result.host;
+      else srcPath.unshift(result.host);
+    }
+    result.host = '';
+    if (relative.protocol) {
+      relative.hostname = null;
+      relative.port = null;
+      if (relative.host) {
+        if (relPath[0] === '') relPath[0] = relative.host;
+        else relPath.unshift(relative.host);
+      }
+      relative.host = null;
+    }
+    mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
+  }
+
+  if (isRelAbs) {
+    // it's absolute.
+    result.host = (relative.host || relative.host === '') ?
+                  relative.host : result.host;
+    result.hostname = (relative.hostname || relative.hostname === '') ?
+                      relative.hostname : result.hostname;
+    result.search = relative.search;
+    result.query = relative.query;
+    srcPath = relPath;
+    // fall through to the dot-handling below.
+  } else if (relPath.length) {
+    // it's relative
+    // throw away the existing file, and take the new path instead.
+    if (!srcPath) srcPath = [];
+    srcPath.pop();
+    srcPath = srcPath.concat(relPath);
+    result.search = relative.search;
+    result.query = relative.query;
+  } else if (!util.isNullOrUndefined(relative.search)) {
+    // just pull out the search.
+    // like href='?foo'.
+    // Put this after the other two cases because it simplifies the booleans
+    if (psychotic) {
+      result.hostname = result.host = srcPath.shift();
+      //occationaly the auth can get stuck only in host
+      //this especially happens in cases like
+      //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
+      var authInHost = result.host && result.host.indexOf('@') > 0 ?
+                       result.host.split('@') : false;
+      if (authInHost) {
+        result.auth = authInHost.shift();
+        result.host = result.hostname = authInHost.shift();
+      }
+    }
+    result.search = relative.search;
+    result.query = relative.query;
+    //to support http.request
+    if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
+      result.path = (result.pathname ? result.pathname : '') +
+                    (result.search ? result.search : '');
+    }
+    result.href = result.format();
+    return result;
+  }
+
+  if (!srcPath.length) {
+    // no path at all.  easy.
+    // we've already handled the other stuff above.
+    result.pathname = null;
+    //to support http.request
+    if (result.search) {
+      result.path = '/' + result.search;
+    } else {
+      result.path = null;
+    }
+    result.href = result.format();
+    return result;
+  }
+
+  // if a url ENDs in . or .., then it must get a trailing slash.
+  // however, if it ends in anything else non-slashy,
+  // then it must NOT get a trailing slash.
+  var last = srcPath.slice(-1)[0];
+  var hasTrailingSlash = (
+      (result.host || relative.host || srcPath.length > 1) &&
+      (last === '.' || last === '..') || last === '');
+
+  // strip single dots, resolve double dots to parent dir
+  // if the path tries to go above the root, `up` ends up > 0
+  var up = 0;
+  for (var i = srcPath.length; i >= 0; i--) {
+    last = srcPath[i];
+    if (last === '.') {
+      srcPath.splice(i, 1);
+    } else if (last === '..') {
+      srcPath.splice(i, 1);
+      up++;
+    } else if (up) {
+      srcPath.splice(i, 1);
+      up--;
+    }
+  }
+
+  // if the path is allowed to go above the root, restore leading ..s
+  if (!mustEndAbs && !removeAllDots) {
+    for (; up--; up) {
+      srcPath.unshift('..');
+    }
+  }
+
+  if (mustEndAbs && srcPath[0] !== '' &&
+      (!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
+    srcPath.unshift('');
+  }
+
+  if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {
+    srcPath.push('');
+  }
+
+  var isAbsolute = srcPath[0] === '' ||
+      (srcPath[0] && srcPath[0].charAt(0) === '/');
+
+  // put the host back
+  if (psychotic) {
+    result.hostname = result.host = isAbsolute ? '' :
+                                    srcPath.length ? srcPath.shift() : '';
+    //occationaly the auth can get stuck only in host
+    //this especially happens in cases like
+    //url.resolveObject('mailto:local1@domain1', 'local2@domain2')
+    var authInHost = result.host && result.host.indexOf('@') > 0 ?
+                     result.host.split('@') : false;
+    if (authInHost) {
+      result.auth = authInHost.shift();
+      result.host = result.hostname = authInHost.shift();
+    }
+  }
+
+  mustEndAbs = mustEndAbs || (result.host && srcPath.length);
+
+  if (mustEndAbs && !isAbsolute) {
+    srcPath.unshift('');
+  }
+
+  if (!srcPath.length) {
+    result.pathname = null;
+    result.path = null;
+  } else {
+    result.pathname = srcPath.join('/');
+  }
+
+  //to support request.http
+  if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
+    result.path = (result.pathname ? result.pathname : '') +
+                  (result.search ? result.search : '');
+  }
+  result.auth = relative.auth || result.auth;
+  result.slashes = result.slashes || relative.slashes;
+  result.href = result.format();
+  return result;
+};
+
+Url.prototype.parseHost = function() {
+  var host = this.host;
+  var port = portPattern.exec(host);
+  if (port) {
+    port = port[0];
+    if (port !== ':') {
+      this.port = port.substr(1);
+    }
+    host = host.substr(0, host.length - port.length);
+  }
+  if (host) this.hostname = host;
+};
+
+var url = {
+	parse: parse,
+	resolve: resolve,
+	resolveObject: resolveObject,
+	format: format,
+	Url: Url_1
+};
+
 var adapter = axios.defaults.adapter;
 
 axios.defaults.adapter = function () {
@@ -31,19 +1442,27 @@ axios.defaults.adapter = function () {
 }();
 
 var createReq = function (endpoint, service, getHeaderSign) {
+  var _ref = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : {},
+      proxy = _ref.proxy;
+
   var req = axios.create({
     baseURL: endpoint + '/' + service.serviceName,
-    maxRedirects: 0
+    maxRedirects: 0,
+    proxy: proxy
   });
 
   req.interceptors.request.use(function (config) {
     var method = config.method.toUpperCase();
-    var path = config.url;
-    if (config.url.indexOf(config.baseURL) === 0) {
-      path = config.url.substring(config.baseURL.length);
+    var path = url.resolve('/', config.url || '');
+
+    if (path.indexOf(config.baseURL) === 0) {
+      path = path.substring(config.baseURL.length);
     }
     config.url = encodeURI(config.url);
-    return getHeaderSign(service, method, path, config.headers['Content-MD5']).then(function (headers) {
+    var headerSign = getHeaderSign(service, method, path, config.headers['Content-MD5']);
+    headerSign = isPromise_1(headerSign) ? headerSign : Promise.resolve(headerSign);
+
+    return headerSign.then(function (headers) {
       config.headers.common = headers;
       return Promise.resolve(config);
     });
@@ -155,16 +1574,6 @@ function b64_hmac_sha1(k,d,_p,_z){
 }
 var hmacsha1 = b64_hmac_sha1;
 
-var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
-
-
-
-
-
-function createCommonjsModule(fn, module) {
-	return module = { exports: {} }, fn(module, module.exports), module.exports;
-}
-
 var base64 = createCommonjsModule(function (module, exports) {
 /*! http://mths.be/base64 v0.1.0 by @mathias | MIT license */
 (function(root) {
@@ -334,7 +1743,7 @@ var base64 = createCommonjsModule(function (module, exports) {
 });
 
 var name = "upyun";
-var version = "3.3.8";
+var version = "3.3.9";
 var description = "UPYUN js sdk";
 var main = "dist/upyun.common.js";
 var module$1 = "dist/upyun.esm.js";
@@ -347,8 +1756,8 @@ var license = "MIT";
 var bugs = { "url": "https://github.com/upyun/node-sdk/issues" };
 var homepage = "https://github.com/upyun/node-sdk";
 var contributors = [{ "name": "yejingx", "email": "yejingx@gmail.com" }, { "name": "Leigh", "email": "i@zhuli.me" }, { "name": "kaidiren", "email": "kaidiren@gmail.com" }, { "name": "Gaara", "email": "sabakugaara@users.noreply.github.com" }];
-var devDependencies = { "babel-cli": "^6.24.1", "babel-loader": "^7.0.0", "babel-plugin-external-helpers": "^6.22.0", "babel-plugin-transform-runtime": "^6.23.0", "babel-preset-env": "^1.4.0", "babel-register": "^6.24.1", "chai": "^3.5.0", "eslint": "^5.16.0", "istanbul": "^0.4.3", "karma": "^1.7.0", "karma-chrome-launcher": "^2.1.1", "karma-mocha": "^1.3.0", "karma-sourcemap-loader": "^0.3.7", "karma-webpack": "^2.0.3", "mocha": "^3.4.1", "rollup": "^0.41.6", "rollup-plugin-alias": "^1.3.1", "rollup-plugin-babel": "^2.7.1", "rollup-plugin-commonjs": "^8.0.2", "rollup-plugin-json": "^2.1.1", "rollup-plugin-node-resolve": "^3.0.0", "should": "^9.0.2", "uglify-js": "^3.0.11", "webpack": "^2.5.1" };
-var dependencies = { "axios": "^0.16.1", "base-64": "^0.1.0", "form-data": "^2.1.4", "hmacsha1": "^1.0.0", "md5": "^2.2.1", "mime-types": "^2.1.15" };
+var devDependencies = { "babel-cli": "^6.24.1", "babel-loader": "^7.0.0", "babel-plugin-external-helpers": "^6.22.0", "babel-plugin-transform-runtime": "^6.23.0", "babel-preset-env": "^1.4.0", "babel-register": "^6.24.1", "chai": "^3.5.0", "delay": "^4.2.0", "eslint": "^5.16.0", "istanbul": "^0.4.3", "karma": "^1.7.0", "karma-chrome-launcher": "^2.1.1", "karma-mocha": "^1.3.0", "karma-sourcemap-loader": "^0.3.7", "karma-webpack": "^2.0.3", "mocha": "^3.4.1", "rollup": "^0.41.6", "rollup-plugin-alias": "^1.3.1", "rollup-plugin-babel": "^2.7.1", "rollup-plugin-commonjs": "^8.0.2", "rollup-plugin-json": "^2.1.1", "rollup-plugin-node-resolve": "^3.0.0", "should": "^9.0.2", "uglify-js": "^3.0.11", "webpack": "^2.5.1" };
+var dependencies = { "axios": "^0.18.0", "base-64": "^0.1.0", "form-data": "^2.1.4", "hmacsha1": "^1.0.0", "is-promise": "^2.1.0", "md5": "^2.2.1", "mime-types": "^2.1.15" };
 var browser = { "./upyun/utils.js": "./upyun/browser-utils.js", "./upyun/form-upload.js": "./upyun/browser-form-upload.js" };
 var pkg = {
 	name: name,
@@ -755,7 +2164,8 @@ function getPolicyAndAuthorization(service, params) {
   var authorization = genSign(service, {
     method: 'POST',
     path: '/' + service.serviceName,
-    policy: policy
+    policy: policy,
+    contentMd5: params['content-md5']
   });
   return {
     policy: policy,
@@ -905,10 +2315,14 @@ var Upyun = function () {
     var config = Object.assign({
       domain: 'v0.api.upyun.com',
       protocol: 'https'
+      // proxy: false // 禁用代理 // 参考 axios 配置. 如: {host: '127.0.0.1', post: 1081}
     }, params);
+
     this.endpoint = config.protocol + '://' + config.domain;
+    var proxy = config.proxy;
 
-    this.req = createReq(this.endpoint, service, getHeaderSign$$1 || defaultGetHeaderSign);
+    this.proxy = proxy;
+    this.req = createReq(this.endpoint, service, getHeaderSign$$1 || defaultGetHeaderSign, { proxy: proxy });
     // NOTE this will be removed
     this.bucket = service;
     this.service = service;
@@ -1443,7 +2857,33 @@ var Upyun = function () {
     value: function formPutFile(remotePath, localFile) {
       var _this4 = this;
 
-      var params = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
+      var orignParams = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
+
+      var params = {};
+      var _iteratorNormalCompletion3 = true;
+      var _didIteratorError3 = false;
+      var _iteratorError3 = undefined;
+
+      try {
+        for (var _iterator3 = Object.keys(orignParams)[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
+          var key = _step3.value;
+
+          params[key.toLowerCase()] = orignParams[key];
+        }
+      } catch (err) {
+        _didIteratorError3 = true;
+        _iteratorError3 = err;
+      } finally {
+        try {
+          if (!_iteratorNormalCompletion3 && _iterator3.return) {
+            _iterator3.return();
+          }
+        } finally {
+          if (_didIteratorError3) {
+            throw _iteratorError3;
+          }
+        }
+      }
 
       if (typeof this.bodySignCallback !== 'function') {
         throw new Error('upyun - must setBodySignCallback first!');
@@ -1452,14 +2892,10 @@ var Upyun = function () {
       params['service'] = this.service.serviceName;
       params['save-key'] = remotePath;
       var result = this.bodySignCallback(this.service, params);
-      if (typeof result.then !== 'function') {
-        result = Promise.resolve(result);
-      }
+      result = isPromise_1(result) ? result : Promise.resolve(result);
 
       return result.then(function (bodySign) {
-        return formUpload(_this4.endpoint + '/' + params['service'], localFile, bodySign).then(function (result) {
-          return Promise.resolve(result);
-        });
+        return formUpload(_this4.endpoint + '/' + params['service'], localFile, bodySign);
       });
     }
   }, {
@@ -1470,7 +2906,8 @@ var Upyun = function () {
       }
       var headers = sign.getPurgeHeaderSign(this.service, urls);
       return axios.post('http://purge.upyun.com/purge/', 'purge=' + urls.join('\n'), {
-        headers: headers
+        headers: headers,
+        proxy: this.proxy
       }).then(function (_ref16) {
         var data = _ref16.data;
 
@@ -1492,33 +2929,32 @@ function isMeta(key) {
 }
 
 function defaultGetHeaderSign() {
-  var headers = sign.getHeaderSign.apply(sign, arguments);
-  return Promise.resolve(headers);
+  return sign.getHeaderSign.apply(sign, arguments);
 }
 
 function key2LowerCase(obj) {
   var objLower = {};
-  var _iteratorNormalCompletion3 = true;
-  var _didIteratorError3 = false;
-  var _iteratorError3 = undefined;
+  var _iteratorNormalCompletion4 = true;
+  var _didIteratorError4 = false;
+  var _iteratorError4 = undefined;
 
   try {
-    for (var _iterator3 = Object.keys(obj)[Symbol.iterator](), _step3; !(_iteratorNormalCompletion3 = (_step3 = _iterator3.next()).done); _iteratorNormalCompletion3 = true) {
-      var key = _step3.value;
+    for (var _iterator4 = Object.keys(obj)[Symbol.iterator](), _step4; !(_iteratorNormalCompletion4 = (_step4 = _iterator4.next()).done); _iteratorNormalCompletion4 = true) {
+      var key = _step4.value;
 
       objLower[key.toLowerCase()] = obj[key];
     }
   } catch (err) {
-    _didIteratorError3 = true;
-    _iteratorError3 = err;
+    _didIteratorError4 = true;
+    _iteratorError4 = err;
   } finally {
     try {
-      if (!_iteratorNormalCompletion3 && _iterator3.return) {
-        _iterator3.return();
+      if (!_iteratorNormalCompletion4 && _iterator4.return) {
+        _iterator4.return();
       }
     } finally {
-      if (_didIteratorError3) {
-        throw _iteratorError3;
+      if (_didIteratorError4) {
+        throw _iteratorError4;
       }
     }
   }
diff --git a/dist/upyun.min.js b/dist/upyun.min.js
index 380da6c..26344b1 100644
--- a/dist/upyun.min.js
+++ b/dist/upyun.min.js
@@ -1,6 +1,6 @@
 /**
-  * UPYUN js-sdk 3.3.8
+  * UPYUN js-sdk 3.3.9
   * (c) 2019
   * @license MIT
   */
-!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t(require("axios")):"function"==typeof define&&define.amd?define(["axios"],t):e.upyun=t(e.axios)}(this,function(u){"use strict";u="default"in u?u.default:u;var a="undefined"!=typeof window&&("undefined"==typeof process||"browser"===process.title),s=1048576,e=u.defaults.adapter;u.defaults.adapter=a?e:require("axios/lib/adapters/http");var h={readBlockAsync:function(n,o,i){return new Promise(function(e,t){var r=n.slice||n.mozSlice||n.webkitSlice;return r?e(r.call(n,o,i)):t(new Error("not support File type!"))})}};var l=function(e,t,i,a){function w(e,t){var r=(65535&e)+(65535&t);return(e>>16)+(t>>16)+(r>>16)<<16|65535&r}function k(e,t){return e<<t|e>>>32-t}function s(e,t){e[t>>5]|=128<<24-t%32,e[15+(t+64>>9<<4)]=t;for(var r,n,o,i,u,a=[80],s=1732584193,l=-271733879,c=-1732584194,f=271733878,h=-1009589776,d=0;d<e.length;d+=16){for(var v=s,p=l,y=c,g=f,m=h,b=0;b<80;b++){a[b]=b<16?e[d+b]:k(a[b-3]^a[b-8]^a[b-14]^a[b-16],1);var x=w(w(k(s,5),(o=l,i=c,u=f,(n=b)<20?o&i|~o&u:n<40?o^i^u:n<60?o&i|o&u|i&u:o^i^u)),w(w(h,a[b]),(r=b)<20?1518500249:r<40?1859775393:r<60?-1894007588:-899497514));h=f,f=c,c=k(l,30),l=s,s=x}s=w(s,v),l=w(l,p),c=w(c,y),f=w(f,g),h=w(h,m)}return[s,l,c,f,h]}function l(e){for(var t=[],r=(1<<a)-1,n=0;n<e.length*a;n+=a)t[n>>5]|=(e.charCodeAt(n/8)&r)<<32-a-n%32;return t}return i||(i="="),a||(a=8),function(e){for(var t="",r=0;r<4*e.length;r+=3)for(var n=(e[r>>2]>>8*(3-r%4)&255)<<16|(e[r+1>>2]>>8*(3-(r+1)%4)&255)<<8|e[r+2>>2]>>8*(3-(r+2)%4)&255,o=0;o<4;o++)8*r+6*o>32*e.length?t+=i:t+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".charAt(n>>6*(3-o)&63);return t}(function(e,t){var r=l(e);16<r.length&&(r=s(r,e.length*a));for(var n=[16],o=[16],i=0;i<16;i++)n[i]=909522486^r[i],o[i]=1549556828^r[i];var u=s(n.concat(l(t)),512+t.length*a);return s(o.concat(u),672)}(e,t))},d="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:{};function t(e,t){return e(t={exports:{}},t.exports),t.exports}function r(e){return null!=e&&(v(e)||function(e){return"function"==typeof e.readFloatLE&&"function"==typeof e.slice&&v(e.slice(0,0))}(e)||!!e._isBuffer)}var n=t(function(s,f){!function(e){var t=f,r=s&&s.exports==t&&s,n="object"==typeof d&&d;n.global!==n&&n.window!==n||(e=n);function o(e){this.message=e}(o.prototype=new Error).name="InvalidCharacterError";function l(e){throw new o(e)}var c="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",a=/[\t\n\f\r ]/g,i={encode:function(e){e=String(e),/[^\0-\xFF]/.test(e)&&l("The string to be encoded contains characters outside of the Latin1 range.");for(var t,r,n,o,i=e.length%3,u="",a=-1,s=e.length-i;++a<s;)t=e.charCodeAt(a)<<16,r=e.charCodeAt(++a)<<8,n=e.charCodeAt(++a),u+=c.charAt((o=t+r+n)>>18&63)+c.charAt(o>>12&63)+c.charAt(o>>6&63)+c.charAt(63&o);return 2==i?(t=e.charCodeAt(a)<<8,r=e.charCodeAt(++a),u+=c.charAt((o=t+r)>>10)+c.charAt(o>>4&63)+c.charAt(o<<2&63)+"="):1==i&&(o=e.charCodeAt(a),u+=c.charAt(o>>2)+c.charAt(o<<4&63)+"=="),u},decode:function(e){var t=(e=String(e).replace(a,"")).length;t%4==0&&(t=(e=e.replace(/==?$/,"")).length),t%4!=1&&!/[^+a-zA-Z0-9/]/.test(e)||l("Invalid character: the string to be decoded is not correctly encoded.");for(var r,n,o=0,i="",u=-1;++u<t;)n=c.indexOf(e.charAt(u)),r=o%4?64*r+n:n,o++%4&&(i+=String.fromCharCode(255&r>>(-2*o&6)));return i},version:"0.1.0"};if(t&&!t.nodeType)if(r)r.exports=i;else for(var u in i)i.hasOwnProperty(u)&&(t[u]=i[u]);else e.base64=i}(d)}),i="3.3.8",o=t(function(e){var i,r;i="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",r={rotl:function(e,t){return e<<t|e>>>32-t},rotr:function(e,t){return e<<32-t|e>>>t},endian:function(e){if(e.constructor==Number)return 16711935&r.rotl(e,8)|4278255360&r.rotl(e,24);for(var t=0;t<e.length;t++)e[t]=r.endian(e[t]);return e},randomBytes:function(e){for(var t=[];0<e;e--)t.push(Math.floor(256*Math.random()));return t},bytesToWords:function(e){for(var t=[],r=0,n=0;r<e.length;r++,n+=8)t[n>>>5]|=e[r]<<24-n%32;return t},wordsToBytes:function(e){for(var t=[],r=0;r<32*e.length;r+=8)t.push(e[r>>>5]>>>24-r%32&255);return t},bytesToHex:function(e){for(var t=[],r=0;r<e.length;r++)t.push((e[r]>>>4).toString(16)),t.push((15&e[r]).toString(16));return t.join("")},hexToBytes:function(e){for(var t=[],r=0;r<e.length;r+=2)t.push(parseInt(e.substr(r,2),16));return t},bytesToBase64:function(e){for(var t=[],r=0;r<e.length;r+=3)for(var n=e[r]<<16|e[r+1]<<8|e[r+2],o=0;o<4;o++)8*r+6*o<=8*e.length?t.push(i.charAt(n>>>6*(3-o)&63)):t.push("=");return t.join("")},base64ToBytes:function(e){e=e.replace(/[^A-Z0-9+\/]/gi,"");for(var t=[],r=0,n=0;r<e.length;n=++r%4)0!=n&&t.push((i.indexOf(e.charAt(r-1))&Math.pow(2,-2*n+8)-1)<<2*n|i.indexOf(e.charAt(r))>>>6-2*n);return t}},e.exports=r}),c={utf8:{stringToBytes:function(e){return c.bin.stringToBytes(unescape(encodeURIComponent(e)))},bytesToString:function(e){return decodeURIComponent(escape(c.bin.bytesToString(e)))}},bin:{stringToBytes:function(e){for(var t=[],r=0;r<e.length;r++)t.push(255&e.charCodeAt(r));return t},bytesToString:function(e){for(var t=[],r=0;r<e.length;r++)t.push(String.fromCharCode(e[r]));return t.join("")}}},f=c;function v(e){return!!e.constructor&&"function"==typeof e.constructor.isBuffer&&e.constructor.isBuffer(e)}var p=t(function(e){var g,m,b,x,w;g=o,m=f.utf8,b=r,x=f.bin,(w=function(e,t){e.constructor==String?e=t&&"binary"===t.encoding?x.stringToBytes(e):m.stringToBytes(e):b(e)?e=Array.prototype.slice.call(e,0):Array.isArray(e)||(e=e.toString());for(var r=g.bytesToWords(e),n=8*e.length,o=1732584193,i=-271733879,u=-1732584194,a=271733878,s=0;s<r.length;s++)r[s]=16711935&(r[s]<<8|r[s]>>>24)|4278255360&(r[s]<<24|r[s]>>>8);r[n>>>5]|=128<<n%32,r[14+(64+n>>>9<<4)]=n;var l=w._ff,c=w._gg,f=w._hh,h=w._ii;for(s=0;s<r.length;s+=16){var d=o,v=i,p=u,y=a;i=h(i=h(i=h(i=h(i=f(i=f(i=f(i=f(i=c(i=c(i=c(i=c(i=l(i=l(i=l(i=l(i,u=l(u,a=l(a,o=l(o,i,u,a,r[s+0],7,-680876936),i,u,r[s+1],12,-389564586),o,i,r[s+2],17,606105819),a,o,r[s+3],22,-1044525330),u=l(u,a=l(a,o=l(o,i,u,a,r[s+4],7,-176418897),i,u,r[s+5],12,1200080426),o,i,r[s+6],17,-1473231341),a,o,r[s+7],22,-45705983),u=l(u,a=l(a,o=l(o,i,u,a,r[s+8],7,1770035416),i,u,r[s+9],12,-1958414417),o,i,r[s+10],17,-42063),a,o,r[s+11],22,-1990404162),u=l(u,a=l(a,o=l(o,i,u,a,r[s+12],7,1804603682),i,u,r[s+13],12,-40341101),o,i,r[s+14],17,-1502002290),a,o,r[s+15],22,1236535329),u=c(u,a=c(a,o=c(o,i,u,a,r[s+1],5,-165796510),i,u,r[s+6],9,-1069501632),o,i,r[s+11],14,643717713),a,o,r[s+0],20,-373897302),u=c(u,a=c(a,o=c(o,i,u,a,r[s+5],5,-701558691),i,u,r[s+10],9,38016083),o,i,r[s+15],14,-660478335),a,o,r[s+4],20,-405537848),u=c(u,a=c(a,o=c(o,i,u,a,r[s+9],5,568446438),i,u,r[s+14],9,-1019803690),o,i,r[s+3],14,-187363961),a,o,r[s+8],20,1163531501),u=c(u,a=c(a,o=c(o,i,u,a,r[s+13],5,-1444681467),i,u,r[s+2],9,-51403784),o,i,r[s+7],14,1735328473),a,o,r[s+12],20,-1926607734),u=f(u,a=f(a,o=f(o,i,u,a,r[s+5],4,-378558),i,u,r[s+8],11,-2022574463),o,i,r[s+11],16,1839030562),a,o,r[s+14],23,-35309556),u=f(u,a=f(a,o=f(o,i,u,a,r[s+1],4,-1530992060),i,u,r[s+4],11,1272893353),o,i,r[s+7],16,-155497632),a,o,r[s+10],23,-1094730640),u=f(u,a=f(a,o=f(o,i,u,a,r[s+13],4,681279174),i,u,r[s+0],11,-358537222),o,i,r[s+3],16,-722521979),a,o,r[s+6],23,76029189),u=f(u,a=f(a,o=f(o,i,u,a,r[s+9],4,-640364487),i,u,r[s+12],11,-421815835),o,i,r[s+15],16,530742520),a,o,r[s+2],23,-995338651),u=h(u,a=h(a,o=h(o,i,u,a,r[s+0],6,-198630844),i,u,r[s+7],10,1126891415),o,i,r[s+14],15,-1416354905),a,o,r[s+5],21,-57434055),u=h(u,a=h(a,o=h(o,i,u,a,r[s+12],6,1700485571),i,u,r[s+3],10,-1894986606),o,i,r[s+10],15,-1051523),a,o,r[s+1],21,-2054922799),u=h(u,a=h(a,o=h(o,i,u,a,r[s+8],6,1873313359),i,u,r[s+15],10,-30611744),o,i,r[s+6],15,-1560198380),a,o,r[s+13],21,1309151649),u=h(u,a=h(a,o=h(o,i,u,a,r[s+4],6,-145523070),i,u,r[s+11],10,-1120210379),o,i,r[s+2],15,718787259),a,o,r[s+9],21,-343485551),o=o+d>>>0,i=i+v>>>0,u=u+p>>>0,a=a+y>>>0}return g.endian([o,i,u,a])})._ff=function(e,t,r,n,o,i,u){var a=e+(t&r|~t&n)+(o>>>0)+u;return(a<<i|a>>>32-i)+t},w._gg=function(e,t,r,n,o,i,u){var a=e+(t&n|r&~n)+(o>>>0)+u;return(a<<i|a>>>32-i)+t},w._hh=function(e,t,r,n,o,i,u){var a=e+(t^r^n)+(o>>>0)+u;return(a<<i|a>>>32-i)+t},w._ii=function(e,t,r,n,o,i,u){var a=e+(r^(t|~n))+(o>>>0)+u;return(a<<i|a>>>32-i)+t},w._blocksize=16,w._digestsize=16,e.exports=function(e,t){if(null==e)throw new Error("Illegal argument "+e);var r=g.wordsToBytes(w(e,t));return t&&t.asBytes?r:t&&t.asString?x.bytesToString(r):g.bytesToHex(r)}});function y(e,t){var r=t.method,n=t.path,o=[r,encodeURI(n)];["date","policy","contentMd5"].forEach(function(e){t[e]&&o.push(t[e])});var i=l(e.password,o.join("&"));return"UPYUN "+e.operatorName+":"+i}function g(e,t){if(!(e instanceof t))throw new TypeError("Cannot call a class as a function")}var m={genSign:y,getHeaderSign:function(e,t,r){var n=3<arguments.length&&void 0!==arguments[3]?arguments[3]:null,o=(new Date).toGMTString();return{Authorization:y(e,{method:t,path:r="/"+e.serviceName+r,date:o,contentMd5:n}),"X-Date":o}},getPolicyAndAuthorization:function(e,t){if(t.service=e.serviceName,void 0===t["save-key"])throw new Error("upyun - calclate body sign need save-key");void 0===t.expiration&&(t.expiration=parseInt(new Date/1e3+1800,10));var r=n.encode(JSON.stringify(t));return{policy:r,authorization:y(e,{method:"POST",path:"/"+e.serviceName,policy:r})}},getPurgeHeaderSign:function(e,t){var r=(new Date).toGMTString(),n=t.join("\n"),o=p(n+"&"+e.serviceName+"&"+r+"&"+e.password);return{Authorization:"UpYun "+e.serviceName+":"+e.operatorName+":"+o,Date:r,"User-Agent":"Js-Sdk/"+i}}};function b(e,t){for(var r=0;r<t.length;r++){var n=t[r];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(e,n.key,n)}}var x=function(e,t){if(Array.isArray(e))return e;if(Symbol.iterator in Object(e))return function(e,t){var r=[],n=!0,o=!1,i=void 0;try{for(var u,a=e[Symbol.iterator]();!(n=(u=a.next()).done)&&(r.push(u.value),!t||r.length!==t);n=!0);}catch(e){o=!0,i=e}finally{try{!n&&a.return&&a.return()}finally{if(o)throw i}}return r}(e,t);throw new TypeError("Invalid attempt to destructure non-iterable instance")};function w(e){var t=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{},r=2<arguments.length&&void 0!==arguments[2]?arguments[2]:null;if(g(this,w),void 0===e.serviceName)throw new Error("upyun - must config serviceName");if("function"==typeof t&&(r=t,t={}),"function"!=typeof r&&a)throw new Error("upyun - must config a callback function getHeaderSign in client side");if(!a&&(void 0===e.operatorName||void 0===e.password))throw new Error("upyun - must config operateName and password in server side");var n=Object.assign({domain:"v0.api.upyun.com",protocol:"https"},t);this.endpoint=n.protocol+"://"+n.domain,this.req=function(e,n,o){var t=u.create({baseURL:e+"/"+n.serviceName,maxRedirects:0});return t.interceptors.request.use(function(t){var e=t.method.toUpperCase(),r=t.url;return 0===t.url.indexOf(t.baseURL)&&(r=t.url.substring(t.baseURL.length)),t.url=encodeURI(t.url),o(n,e,r,t.headers["Content-MD5"]).then(function(e){return t.headers.common=e,Promise.resolve(t)})},function(e){throw new Error("upyun - request failed: "+e.message)}),t.interceptors.response.use(function(e){return e},function(e){var t=e.response;if(void 0===t)throw e;if(404!==t.status)throw new Error("upyun - response error: "+e.message);return t}),t}(this.endpoint,e,r||S),this.bucket=e,this.service=e,a||this.setBodySignCallback(m.getPolicyAndAuthorization)}function k(e){return 0===e.indexOf("x-upyun-meta-")}function S(){var e=m.getHeaderSign.apply(m,arguments);return Promise.resolve(e)}function A(e){var t=1<arguments.length&&void 0!==arguments[1]?arguments[1]:"",r=2<arguments.length&&void 0!==arguments[2]?arguments[2]:"";g(this,A),this.bucketName=e,this.serviceName=this.bucketName,this.operatorName=t,this.password=p(r)}return{Client:(function(e,t,r){return t&&b(e.prototype,t),r&&b(e,r),e}(w,[{key:"setService",value:function(e){this.service=e,this.req.defaults.baseURL=this.endpoint+"/"+e.serviceName}},{key:"setBucket",value:function(e){return this.setService(e)}},{key:"setBodySignCallback",value:function(e){if("function"!=typeof e)throw new Error("upyun - getBodySign should be a function");this.bodySignCallback=e}},{key:"usage",value:function(){var e=0<arguments.length&&void 0!==arguments[0]?arguments[0]:"/";return this.req.get(e+"?usage").then(function(e){var t=e.data;return Promise.resolve(t)})}},{key:"listDir",value:function(){var e=0<arguments.length&&void 0!==arguments[0]?arguments[0]:"/",t=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{},r=t.limit,n=void 0===r?100:r,o=t.order,i=void 0===o?"asc":o,u=t.iter,a=void 0===u?"":u,s={};return 100!==n&&(s["x-list-limit"]=n),"asc"!==i&&(s["x-list-order"]=i),a&&(s["x-list-iter"]=a),this.req.get(e,{headers:s}).then(function(e){var t=e.data,r=e.headers;if(404===e.status)return!1;var n=r["x-upyun-list-iter"];if(!t)return Promise.resolve({files:[],next:n});var o=t.split("\n").map(function(e){var t=e.split("\t"),r=x(t,4),n=r[0],o=r[1],i=r[2],u=r[3];return{name:n,type:o,size:parseInt(i),time:parseInt(u)}});return Promise.resolve({files:o,next:n})})}},{key:"putFile",value:function(e,t){var r=2<arguments.length&&void 0!==arguments[2]?arguments[2]:{},n=["Content-MD5","Content-Length","Content-Type","Content-Secret","x-gmkerl-thumb"],o={},i={},u=!0,a=!1,s=void 0;try{for(var l,c=Object.keys(r)[Symbol.iterator]();!(u=(l=c.next()).done);u=!0){var f=l.value;i[f.toLowerCase()]=r[f]}}catch(e){a=!0,s=e}finally{try{!u&&c.return&&c.return()}finally{if(a)throw s}}var h=!0,d=!1,v=void 0;try{for(var p,y=Object.keys(i)[Symbol.iterator]();!(h=(p=y.next()).done);h=!0){var g=p.value;k(g)&&i[g]?o[g]=i[g]:n.forEach(function(e){var t=e.toLowerCase(),r=i[t];r&&(o[e]=r)})}}catch(e){d=!0,v=e}finally{try{!h&&y.return&&y.return()}finally{if(d)throw v}}return this.req.put(e,t,{headers:o}).then(function(e){var r=e.headers;if(200!==e.status)return Promise.resolve(!1);var n={};return["x-upyun-width","x-upyun-height","x-upyun-file-type","x-upyun-frames"].forEach(function(e){var t=e.split("x-upyun-")[1];r[e]&&(n[t]=r[e],"file-type"!==t&&(n[t]=parseInt(n[t],10)))}),Promise.resolve(!(0<Object.keys(n).length)||n)})}},{key:"initMultipartUpload",value:function(e,t){var r=this,n=void 0,o=function(e){var t={},r=!0,n=!1,o=void 0;try{for(var i,u=Object.keys(e)[Symbol.iterator]();!(r=(i=u.next()).done);r=!0){var a=i.value;t[a.toLowerCase()]=e[a]}}catch(e){n=!0,o=e}finally{try{!r&&u.return&&u.return()}finally{if(n)throw o}}return t}(2<arguments.length&&void 0!==arguments[2]?arguments[2]:{}),i=o["x-upyun-multi-type"];return i=a?(n=Promise.resolve(t.size),i||t.type):(n=h.getFileSizeAsync(t),i||h.getContentType(t)),n.then(function(n){return Object.assign(o,{"x-upyun-multi-disorder":!0,"x-upyun-multi-stage":"initiate","x-upyun-multi-length":n,"x-upyun-multi-type":i}),r.req.put(e,null,{headers:o}).then(function(e){var t=e.headers;if(204!==e.status)return Promise.resolve(!1);var r=t["x-upyun-multi-uuid"];return Promise.resolve({fileSize:n,partCount:Math.ceil(n/s),uuid:r})})})}},{key:"multipartUpload",value:function(t,r,n,o){var i=this,u=o*s;return(a?Promise.resolve(r.size):h.getFileSizeAsync(r)).then(function(e){var t=Math.min(u+s,e);return h.readBlockAsync(r,u,t)}).then(function(e){return i.req.put(t,e,{headers:{"x-upyun-multi-stage":"upload","x-upyun-multi-uuid":n,"x-upyun-part-id":o}}).then(function(e){var t=e.status;return Promise.resolve(204===t)})})}},{key:"completeMultipartUpload",value:function(e,t){return this.req.put(e,null,{headers:{"x-upyun-multi-stage":"complete","x-upyun-multi-uuid":t}}).then(function(e){var t=e.status;return Promise.resolve(204===t||201===t)})}},{key:"makeDir",value:function(e){return this.req.post(e,null,{headers:{folder:"true"}}).then(function(e){var t=e.status;return Promise.resolve(200===t)})}},{key:"headFile",value:function(e){return this.req.head(e).then(function(e){var r=e.headers;if(404===e.status)return Promise.resolve(!1);var n={"Content-Md5":r["content-md5"]||""};return["x-upyun-file-type","x-upyun-file-size","x-upyun-file-date"].forEach(function(e){var t=e.split("x-upyun-file-")[1];r[e]&&(n[t]=r[e],"size"!==t&&"date"!==t||(n[t]=parseInt(n[t],10)))}),Promise.resolve(n)})}},{key:"deleteFile",value:function(e){var t={};return 1<arguments.length&&void 0!==arguments[1]&&arguments[1]&&(t["x-upyun-async"]=!0),this.req.delete(e,{headers:t}).then(function(e){var t=e.status;return Promise.resolve(200===t)})}},{key:"deleteDir",value:function(){for(var e=arguments.length,t=Array(e),r=0;r<e;r++)t[r]=arguments[r];return this.deleteFile.apply(this,t)}},{key:"getFile",value:function(e){var t=1<arguments.length&&void 0!==arguments[1]?arguments[1]:null;if(t&&a)throw new Error("upyun - save as stream are only available on the server side.");return this.req({method:"GET",url:e,responseType:t?"stream":null}).then(function(e){if(404===e.status)return Promise.resolve(!1);if(!t)return Promise.resolve(e.data);var r=e.data.pipe(t);return new Promise(function(e,t){r.on("finish",function(){return e(r)}),r.on("error",t)})})}},{key:"updateMetadata",value:function(e,t){var r=2<arguments.length&&void 0!==arguments[2]?arguments[2]:"merge",n={};for(var o in t)k(o)?n[o]=t:n["x-upyun-meta-"+o]=t[o];return this.req.patch(e+"?metadata="+r,null,{headers:n}).then(function(e){var t=e.status;return Promise.resolve(200===t)})}},{key:"getMetadata",value:function(e){return this.req.get(e).then(function(e){var t=e.headers;if(200!==e.status)return Promise.resolve(!1);var r={};for(var n in t)k(n)&&(r[n]=t[n]);return Promise.resolve(r)})}},{key:"blockUpload",value:function(l,c){var f=this,e=2<arguments.length&&void 0!==arguments[2]?arguments[2]:{},t=void 0,r=void 0;return r=a?(t=Promise.resolve(c.size),c.type):(t=h.getFileSizeAsync(c),h.getContentType(c)),t.then(function(u){Object.assign(e,{"x-upyun-multi-stage":"initiate","x-upyun-multi-length":u,"x-upyun-multi-type":r});var a=1048576,s=Math.ceil(u/a);return f.req.put(l,null,{headers:e}).then(function(e){for(var t=e.headers,n=t["x-upyun-multi-uuid"],r=t["x-upyun-next-part-id"],o=Promise.resolve(r),i=0;i<s;i++)o=o.then(function(r){var e=r*a,t=Math.min(e+a,u);return h.readBlockAsync(c,e,t).then(function(e){return f.req.put(l,e,{headers:{"x-upyun-multi-stage":"upload","x-upyun-multi-uuid":n,"x-upyun-part-id":r}}).then(function(e){var t=e.headers;return r=t["x-upyun-next-part-id"],Promise.resolve(r)})})});return o.then(function(){return f.req.put(l,null,{headers:{"x-upyun-multi-stage":"complete","x-upyun-multi-uuid":n}}).then(function(e){var t=e.status;return Promise.resolve(204===t||201===t)})})})})}},{key:"formPutFile",value:function(e,t){var r=this,n=2<arguments.length&&void 0!==arguments[2]?arguments[2]:{};if("function"!=typeof this.bodySignCallback)throw new Error("upyun - must setBodySignCallback first!");n.service=this.service.serviceName,n["save-key"]=e;var o=this.bodySignCallback(this.service,n);return"function"!=typeof o.then&&(o=Promise.resolve(o)),o.then(function(e){return function(e,t,r){var n=r.authorization,o=r.policy,i=new FormData;return i.append("authorization",n),i.append("policy",o),"string"==typeof t&&(t=new Blob([t],{type:"text/plain"})),i.append("file",t),u.post(e,i).then(function(e){var t=e.status,r=e.data;return 200===t&&Promise.resolve(r)})}(r.endpoint+"/"+n.service,t,e).then(function(e){return Promise.resolve(e)})})}},{key:"purge",value:function(e){"string"==typeof e&&(e=[e]);var t=m.getPurgeHeaderSign(this.service,e);return u.post("http://purge.upyun.com/purge/","purge="+e.join("\n"),{headers:t}).then(function(e){var t=e.data;if(0===Object.keys(t.invalid_domain_of_url).length)return!0;throw new Error("some url purge failed "+t.invalid_domain_of_url.join(" "))},function(e){throw new Error("upyun - request failed: "+e.message)})}}]),w),sign:m,Bucket:A,Service:A}});
\ No newline at end of file
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e(require("axios")):"function"==typeof define&&define.amd?define(["axios"],e):t.upyun=e(t.axios)}(this,function(f){"use strict";f="default"in f?f.default:f;var s="undefined"!=typeof window&&("undefined"==typeof process||"browser"===process.title),u=1048576,p=function(t){return!!t&&("object"==typeof t||"function"==typeof t)&&"function"==typeof t.then};var E="undefined"!=typeof window?window:"undefined"!=typeof global?global:"undefined"!=typeof self?self:{};function t(t,e){return t(e={exports:{}},e.exports),e.exports}var N=t(function(T,U){!function(t){var e=U&&!U.nodeType&&U,r=T&&!T.nodeType&&T,n="object"==typeof E&&E;n.global!==n&&n.window!==n&&n.self!==n||(t=n);var o,i,m=2147483647,g=36,b=1,x=26,a=38,s=700,w=72,A=128,C="-",u=/^xn--/,h=/[^\x20-\x7E]/,l=/[\x2E\u3002\uFF0E\uFF61]/g,c={overflow:"Overflow: input needs wider integers to process","not-basic":"Illegal input >= 0x80 (not a basic code point)","invalid-input":"Invalid input"},f=g-b,k=Math.floor,S=String.fromCharCode;function j(t){throw RangeError(c[t])}function p(t,e){for(var r=t.length,n=[];r--;)n[r]=e(t[r]);return n}function v(t,e){var r=t.split("@"),n="";return 1<r.length&&(n=r[0]+"@",t=r[1]),n+p((t=t.replace(l,".")).split("."),e).join(".")}function O(t){for(var e,r,n=[],o=0,i=t.length;o<i;)55296<=(e=t.charCodeAt(o++))&&e<=56319&&o<i?56320==(64512&(r=t.charCodeAt(o++)))?n.push(((1023&e)<<10)+(1023&r)+65536):(n.push(e),o--):n.push(e);return n}function P(t){return p(t,function(t){var e="";return 65535<t&&(e+=S((t-=65536)>>>10&1023|55296),t=56320|1023&t),e+=S(t)}).join("")}function q(t,e){return t+22+75*(t<26)-((0!=e)<<5)}function I(t,e,r){var n=0;for(t=r?k(t/s):t>>1,t+=k(t/e);f*x>>1<t;n+=g)t=k(t/f);return k(n+(f+1)*t/(t+a))}function d(t){var e,r,n,o,i,a,s,u,h,l,c,f=[],p=t.length,v=0,d=A,y=w;for((r=t.lastIndexOf(C))<0&&(r=0),n=0;n<r;++n)128<=t.charCodeAt(n)&&j("not-basic"),f.push(t.charCodeAt(n));for(o=0<r?r+1:0;o<p;){for(i=v,a=1,s=g;p<=o&&j("invalid-input"),c=t.charCodeAt(o++),(g<=(u=c-48<10?c-22:c-65<26?c-65:c-97<26?c-97:g)||u>k((m-v)/a))&&j("overflow"),v+=u*a,!(u<(h=s<=y?b:y+x<=s?x:s-y));s+=g)a>k(m/(l=g-h))&&j("overflow"),a*=l;y=I(v-i,e=f.length+1,0==i),k(v/e)>m-d&&j("overflow"),d+=k(v/e),v%=e,f.splice(v++,0,d)}return P(f)}function y(t){var e,r,n,o,i,a,s,u,h,l,c,f,p,v,d,y=[];for(f=(t=O(t)).length,e=A,i=w,a=r=0;a<f;++a)(c=t[a])<128&&y.push(S(c));for(n=o=y.length,o&&y.push(C);n<f;){for(s=m,a=0;a<f;++a)e<=(c=t[a])&&c<s&&(s=c);for(s-e>k((m-r)/(p=n+1))&&j("overflow"),r+=(s-e)*p,e=s,a=0;a<f;++a)if((c=t[a])<e&&++r>m&&j("overflow"),c==e){for(u=r,h=g;!(u<(l=h<=i?b:i+x<=h?x:h-i));h+=g)d=u-l,v=g-l,y.push(S(q(l+d%v,0))),u=k(d/v);y.push(S(q(u,0))),i=I(r,p,n==o),r=0,++n}++r,++e}return y.join("")}if(o={version:"1.3.2",ucs2:{decode:O,encode:P},decode:d,encode:y,toASCII:function(t){return v(t,function(t){return h.test(t)?"xn--"+y(t):t})},toUnicode:function(t){return v(t,function(t){return u.test(t)?d(t.slice(4).toLowerCase()):t})}},e&&r)if(T.exports==e)r.exports=o;else for(i in o)o.hasOwnProperty(i)&&(e[i]=o[i]);else t.punycode=o}(E)}),B={isString:function(t){return"string"==typeof t},isObject:function(t){return"object"==typeof t&&null!==t},isNull:function(t){return null===t},isNullOrUndefined:function(t){return null==t}};function r(t,e,r,n){e=e||"&",r=r||"=";var o={};if("string"!=typeof t||0===t.length)return o;var i=/\+/g;t=t.split(e);var a=1e3;n&&"number"==typeof n.maxKeys&&(a=n.maxKeys);var s,u,h=t.length;0<a&&a<h&&(h=a);for(var l=0;l<h;++l){var c,f,p,v,d=t[l].replace(i,"%20"),y=d.indexOf(r);f=0<=y?(c=d.substr(0,y),d.substr(y+1)):(c=d,""),p=decodeURIComponent(c),v=decodeURIComponent(f),s=o,u=p,Object.prototype.hasOwnProperty.call(s,u)?Array.isArray(o[p])?o[p].push(v):o[p]=[o[p],v]:o[p]=v}return o}function i(t){switch(typeof t){case"string":return t;case"boolean":return t?"true":"false";case"number":return isFinite(t)?t:"";default:return""}}function n(r,n,o,t){return n=n||"&",o=o||"=",null===r&&(r=void 0),"object"==typeof r?Object.keys(r).map(function(t){var e=encodeURIComponent(i(t))+o;return Array.isArray(r[t])?r[t].map(function(t){return e+encodeURIComponent(i(t))}).join(n):e+encodeURIComponent(i(r[t]))}).join(n):t?encodeURIComponent(i(t))+o+encodeURIComponent(i(r)):""}function e(t,e){return d(t,!1,!0).resolve(e)}function o(t,e){return t?d(t,!1,!0).resolveObject(e):e}function a(t){return B.isString(t)&&(t=d(t)),t instanceof O?t.format():O.prototype.format.call(t)}var z=t(function(t,e){e.decode=e.parse=r,e.encode=e.stringify=n}),h=d,l=O;function O(){this.protocol=null,this.slashes=null,this.auth=null,this.host=null,this.port=null,this.hostname=null,this.hash=null,this.search=null,this.query=null,this.pathname=null,this.path=null,this.href=null}var R=/^([a-z0-9.+-]+:)/i,c=/:[0-9]*$/,M=/^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,v=["{","}","|","\\","^","`"].concat(["<",">",'"',"`"," ","\r","\n","\t"]),F=["'"].concat(v),_=["%","/","?",";","#"].concat(F),L=["/","?","#"],D=/^[+a-z0-9A-Z_-]{0,63}$/,H=/^([+a-z0-9A-Z_-]{0,63})(.*)$/,Z={javascript:!0,"javascript:":!0},G={javascript:!0,"javascript:":!0},J={http:!0,https:!0,ftp:!0,gopher:!0,file:!0,"http:":!0,"https:":!0,"ftp:":!0,"gopher:":!0,"file:":!0};function d(t,e,r){if(t&&B.isObject(t)&&t instanceof O)return t;var n=new O;return n.parse(t,e,r),n}O.prototype.parse=function(t,e,r){if(!B.isString(t))throw new TypeError("Parameter 'url' must be a string, not "+typeof t);var n=t.indexOf("?"),o=-1!==n&&n<t.indexOf("#")?"?":"#",i=t.split(o);i[0]=i[0].replace(/\\/g,"/");var a=t=i.join(o);if(a=a.trim(),!r&&1===t.split("#").length){var s=M.exec(a);if(s)return this.path=a,this.href=a,this.pathname=s[1],s[2]?(this.search=s[2],this.query=e?z.parse(this.search.substr(1)):this.search.substr(1)):e&&(this.search="",this.query={}),this}var u=R.exec(a);if(u){var h=(u=u[0]).toLowerCase();this.protocol=h,a=a.substr(u.length)}if(r||u||a.match(/^\/\/[^@\/]+@[^@\/]+/)){var l="//"===a.substr(0,2);!l||u&&G[u]||(a=a.substr(2),this.slashes=!0)}if(!G[u]&&(l||u&&!J[u])){for(var c,f,p=-1,v=0;v<L.length;v++){-1!==(d=a.indexOf(L[v]))&&(-1===p||d<p)&&(p=d)}-1!==(f=-1===p?a.lastIndexOf("@"):a.lastIndexOf("@",p))&&(c=a.slice(0,f),a=a.slice(f+1),this.auth=decodeURIComponent(c)),p=-1;for(v=0;v<_.length;v++){var d;-1!==(d=a.indexOf(_[v]))&&(-1===p||d<p)&&(p=d)}-1===p&&(p=a.length),this.host=a.slice(0,p),a=a.slice(p),this.parseHost(),this.hostname=this.hostname||"";var y="["===this.hostname[0]&&"]"===this.hostname[this.hostname.length-1];if(!y)for(var m=this.hostname.split(/\./),g=(v=0,m.length);v<g;v++){var b=m[v];if(b&&!b.match(D)){for(var x="",w=0,A=b.length;w<A;w++)127<b.charCodeAt(w)?x+="x":x+=b[w];if(!x.match(D)){var C=m.slice(0,v),k=m.slice(v+1),S=b.match(H);S&&(C.push(S[1]),k.unshift(S[2])),k.length&&(a="/"+k.join(".")+a),this.hostname=C.join(".");break}}}255<this.hostname.length?this.hostname="":this.hostname=this.hostname.toLowerCase(),y||(this.hostname=N.toASCII(this.hostname));var j=this.port?":"+this.port:"",O=this.hostname||"";this.host=O+j,this.href+=this.host,y&&(this.hostname=this.hostname.substr(1,this.hostname.length-2),"/"!==a[0]&&(a="/"+a))}if(!Z[h])for(v=0,g=F.length;v<g;v++){var P=F[v];if(-1!==a.indexOf(P)){var q=encodeURIComponent(P);q===P&&(q=escape(P)),a=a.split(P).join(q)}}var I=a.indexOf("#");-1!==I&&(this.hash=a.substr(I),a=a.slice(0,I));var T=a.indexOf("?");if(-1!==T?(this.search=a.substr(T),this.query=a.substr(T+1),e&&(this.query=z.parse(this.query)),a=a.slice(0,T)):e&&(this.search="",this.query={}),a&&(this.pathname=a),J[h]&&this.hostname&&!this.pathname&&(this.pathname="/"),this.pathname||this.search){j=this.pathname||"";var U=this.search||"";this.path=j+U}return this.href=this.format(),this},O.prototype.format=function(){var t=this.auth||"";t&&(t=(t=encodeURIComponent(t)).replace(/%3A/i,":"),t+="@");var e=this.protocol||"",r=this.pathname||"",n=this.hash||"",o=!1,i="";this.host?o=t+this.host:this.hostname&&(o=t+(-1===this.hostname.indexOf(":")?this.hostname:"["+this.hostname+"]"),this.port&&(o+=":"+this.port)),this.query&&B.isObject(this.query)&&Object.keys(this.query).length&&(i=z.stringify(this.query));var a=this.search||i&&"?"+i||"";return e&&":"!==e.substr(-1)&&(e+=":"),this.slashes||(!e||J[e])&&!1!==o?(o="//"+(o||""),r&&"/"!==r.charAt(0)&&(r="/"+r)):o||(o=""),n&&"#"!==n.charAt(0)&&(n="#"+n),a&&"?"!==a.charAt(0)&&(a="?"+a),e+o+(r=r.replace(/[?#]/g,function(t){return encodeURIComponent(t)}))+(a=a.replace("#","%23"))+n},O.prototype.resolve=function(t){return this.resolveObject(d(t,!1,!0)).format()},O.prototype.resolveObject=function(t){if(B.isString(t)){var e=new O;e.parse(t,!1,!0),t=e}for(var r=new O,n=Object.keys(this),o=0;o<n.length;o++){var i=n[o];r[i]=this[i]}if(r.hash=t.hash,""===t.href)return r.href=r.format(),r;if(t.slashes&&!t.protocol){for(var a=Object.keys(t),s=0;s<a.length;s++){var u=a[s];"protocol"!==u&&(r[u]=t[u])}return J[r.protocol]&&r.hostname&&!r.pathname&&(r.path=r.pathname="/"),r.href=r.format(),r}if(t.protocol&&t.protocol!==r.protocol){if(!J[t.protocol]){for(var h=Object.keys(t),l=0;l<h.length;l++){var c=h[l];r[c]=t[c]}return r.href=r.format(),r}if(r.protocol=t.protocol,t.host||G[t.protocol])r.pathname=t.pathname;else{for(var f=(t.pathname||"").split("/");f.length&&!(t.host=f.shift()););t.host||(t.host=""),t.hostname||(t.hostname=""),""!==f[0]&&f.unshift(""),f.length<2&&f.unshift(""),r.pathname=f.join("/")}if(r.search=t.search,r.query=t.query,r.host=t.host||"",r.auth=t.auth,r.hostname=t.hostname||t.host,r.port=t.port,r.pathname||r.search){var p=r.pathname||"",v=r.search||"";r.path=p+v}return r.slashes=r.slashes||t.slashes,r.href=r.format(),r}var d=r.pathname&&"/"===r.pathname.charAt(0),y=t.host||t.pathname&&"/"===t.pathname.charAt(0),m=y||d||r.host&&t.pathname,g=m,b=r.pathname&&r.pathname.split("/")||[],x=(f=t.pathname&&t.pathname.split("/")||[],r.protocol&&!J[r.protocol]);if(x&&(r.hostname="",r.port=null,r.host&&(""===b[0]?b[0]=r.host:b.unshift(r.host)),r.host="",t.protocol&&(t.hostname=null,t.port=null,t.host&&(""===f[0]?f[0]=t.host:f.unshift(t.host)),t.host=null),m=m&&(""===f[0]||""===b[0])),y)r.host=t.host||""===t.host?t.host:r.host,r.hostname=t.hostname||""===t.hostname?t.hostname:r.hostname,r.search=t.search,r.query=t.query,b=f;else if(f.length)b||(b=[]),b.pop(),b=b.concat(f),r.search=t.search,r.query=t.query;else if(!B.isNullOrUndefined(t.search)){if(x)r.hostname=r.host=b.shift(),(S=!!(r.host&&0<r.host.indexOf("@"))&&r.host.split("@"))&&(r.auth=S.shift(),r.host=r.hostname=S.shift());return r.search=t.search,r.query=t.query,B.isNull(r.pathname)&&B.isNull(r.search)||(r.path=(r.pathname?r.pathname:"")+(r.search?r.search:"")),r.href=r.format(),r}if(!b.length)return r.pathname=null,r.search?r.path="/"+r.search:r.path=null,r.href=r.format(),r;for(var w=b.slice(-1)[0],A=(r.host||t.host||1<b.length)&&("."===w||".."===w)||""===w,C=0,k=b.length;0<=k;k--)"."===(w=b[k])?b.splice(k,1):".."===w?(b.splice(k,1),C++):C&&(b.splice(k,1),C--);if(!m&&!g)for(;C--;C)b.unshift("..");!m||""===b[0]||b[0]&&"/"===b[0].charAt(0)||b.unshift(""),A&&"/"!==b.join("/").substr(-1)&&b.push("");var S,j=""===b[0]||b[0]&&"/"===b[0].charAt(0);x&&(r.hostname=r.host=j?"":b.length?b.shift():"",(S=!!(r.host&&0<r.host.indexOf("@"))&&r.host.split("@"))&&(r.auth=S.shift(),r.host=r.hostname=S.shift()));return(m=m||r.host&&b.length)&&!j&&b.unshift(""),b.length?r.pathname=b.join("/"):(r.pathname=null,r.path=null),B.isNull(r.pathname)&&B.isNull(r.search)||(r.path=(r.pathname?r.pathname:"")+(r.search?r.search:"")),r.auth=t.auth||r.auth,r.slashes=r.slashes||t.slashes,r.href=r.format(),r},O.prototype.parseHost=function(){var t=this.host,e=c.exec(t);e&&(":"!==(e=e[0])&&(this.port=e.substr(1)),t=t.substr(0,t.length-e.length)),t&&(this.hostname=t)};var y={parse:h,resolve:e,resolveObject:o,format:a,Url:l},m=f.defaults.adapter;f.defaults.adapter=s?m:require("axios/lib/adapters/http");var g={readBlockAsync:function(n,o,i){return new Promise(function(t,e){var r=n.slice||n.mozSlice||n.webkitSlice;return r?t(r.call(n,o,i)):e(new Error("not support File type!"))})}};function A(t){return null!=t&&(j(t)||function(t){return"function"==typeof t.readFloatLE&&"function"==typeof t.slice&&j(t.slice(0,0))}(t)||!!t._isBuffer)}var b=function(t,e,i,s){function w(t,e){var r=(65535&t)+(65535&e);return(t>>16)+(e>>16)+(r>>16)<<16|65535&r}function A(t,e){return t<<e|t>>>32-e}function u(t,e){t[e>>5]|=128<<24-e%32,t[15+(e+64>>9<<4)]=e;for(var r,n,o,i,a,s=[80],u=1732584193,h=-271733879,l=-1732584194,c=271733878,f=-1009589776,p=0;p<t.length;p+=16){for(var v=u,d=h,y=l,m=c,g=f,b=0;b<80;b++){s[b]=b<16?t[p+b]:A(s[b-3]^s[b-8]^s[b-14]^s[b-16],1);var x=w(w(A(u,5),(o=h,i=l,a=c,(n=b)<20?o&i|~o&a:n<40?o^i^a:n<60?o&i|o&a|i&a:o^i^a)),w(w(f,s[b]),(r=b)<20?1518500249:r<40?1859775393:r<60?-1894007588:-899497514));f=c,c=l,l=A(h,30),h=u,u=x}u=w(u,v),h=w(h,d),l=w(l,y),c=w(c,m),f=w(f,g)}return[u,h,l,c,f]}function h(t){for(var e=[],r=(1<<s)-1,n=0;n<t.length*s;n+=s)e[n>>5]|=(t.charCodeAt(n/8)&r)<<32-s-n%32;return e}return i||(i="="),s||(s=8),function(t){for(var e="",r=0;r<4*t.length;r+=3)for(var n=(t[r>>2]>>8*(3-r%4)&255)<<16|(t[r+1>>2]>>8*(3-(r+1)%4)&255)<<8|t[r+2>>2]>>8*(3-(r+2)%4)&255,o=0;o<4;o++)8*r+6*o>32*t.length?e+=i:e+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".charAt(n>>6*(3-o)&63);return e}(function(t,e){var r=h(t);16<r.length&&(r=u(r,t.length*s));for(var n=[16],o=[16],i=0;i<16;i++)n[i]=909522486^r[i],o[i]=1549556828^r[i];var a=u(n.concat(h(e)),512+e.length*s);return u(o.concat(a),672)}(t,e))},x=t(function(u,c){!function(t){var e=c,r=u&&u.exports==e&&u,n="object"==typeof E&&E;n.global!==n&&n.window!==n||(t=n);function o(t){this.message=t}(o.prototype=new Error).name="InvalidCharacterError";function h(t){throw new o(t)}var l="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",s=/[\t\n\f\r ]/g,i={encode:function(t){t=String(t),/[^\0-\xFF]/.test(t)&&h("The string to be encoded contains characters outside of the Latin1 range.");for(var e,r,n,o,i=t.length%3,a="",s=-1,u=t.length-i;++s<u;)e=t.charCodeAt(s)<<16,r=t.charCodeAt(++s)<<8,n=t.charCodeAt(++s),a+=l.charAt((o=e+r+n)>>18&63)+l.charAt(o>>12&63)+l.charAt(o>>6&63)+l.charAt(63&o);return 2==i?(e=t.charCodeAt(s)<<8,r=t.charCodeAt(++s),a+=l.charAt((o=e+r)>>10)+l.charAt(o>>4&63)+l.charAt(o<<2&63)+"="):1==i&&(o=t.charCodeAt(s),a+=l.charAt(o>>2)+l.charAt(o<<4&63)+"=="),a},decode:function(t){var e=(t=String(t).replace(s,"")).length;e%4==0&&(e=(t=t.replace(/==?$/,"")).length),e%4!=1&&!/[^+a-zA-Z0-9/]/.test(t)||h("Invalid character: the string to be decoded is not correctly encoded.");for(var r,n,o=0,i="",a=-1;++a<e;)n=l.indexOf(t.charAt(a)),r=o%4?64*r+n:n,o++%4&&(i+=String.fromCharCode(255&r>>(-2*o&6)));return i},version:"0.1.0"};if(e&&!e.nodeType)if(r)r.exports=i;else for(var a in i)i.hasOwnProperty(a)&&(e[a]=i[a]);else t.base64=i}(E)}),w="3.3.9",C=t(function(t){var i,r;i="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",r={rotl:function(t,e){return t<<e|t>>>32-e},rotr:function(t,e){return t<<32-e|t>>>e},endian:function(t){if(t.constructor==Number)return 16711935&r.rotl(t,8)|4278255360&r.rotl(t,24);for(var e=0;e<t.length;e++)t[e]=r.endian(t[e]);return t},randomBytes:function(t){for(var e=[];0<t;t--)e.push(Math.floor(256*Math.random()));return e},bytesToWords:function(t){for(var e=[],r=0,n=0;r<t.length;r++,n+=8)e[n>>>5]|=t[r]<<24-n%32;return e},wordsToBytes:function(t){for(var e=[],r=0;r<32*t.length;r+=8)e.push(t[r>>>5]>>>24-r%32&255);return e},bytesToHex:function(t){for(var e=[],r=0;r<t.length;r++)e.push((t[r]>>>4).toString(16)),e.push((15&t[r]).toString(16));return e.join("")},hexToBytes:function(t){for(var e=[],r=0;r<t.length;r+=2)e.push(parseInt(t.substr(r,2),16));return e},bytesToBase64:function(t){for(var e=[],r=0;r<t.length;r+=3)for(var n=t[r]<<16|t[r+1]<<8|t[r+2],o=0;o<4;o++)8*r+6*o<=8*t.length?e.push(i.charAt(n>>>6*(3-o)&63)):e.push("=");return e.join("")},base64ToBytes:function(t){t=t.replace(/[^A-Z0-9+\/]/gi,"");for(var e=[],r=0,n=0;r<t.length;n=++r%4)0!=n&&e.push((i.indexOf(t.charAt(r-1))&Math.pow(2,-2*n+8)-1)<<2*n|i.indexOf(t.charAt(r))>>>6-2*n);return e}},t.exports=r}),k={utf8:{stringToBytes:function(t){return k.bin.stringToBytes(unescape(encodeURIComponent(t)))},bytesToString:function(t){return decodeURIComponent(escape(k.bin.bytesToString(t)))}},bin:{stringToBytes:function(t){for(var e=[],r=0;r<t.length;r++)e.push(255&t.charCodeAt(r));return e},bytesToString:function(t){for(var e=[],r=0;r<t.length;r++)e.push(String.fromCharCode(t[r]));return e.join("")}}},S=k;function j(t){return!!t.constructor&&"function"==typeof t.constructor.isBuffer&&t.constructor.isBuffer(t)}var P=t(function(t){var m,g,b,x,w;m=C,g=S.utf8,b=A,x=S.bin,(w=function(t,e){t.constructor==String?t=e&&"binary"===e.encoding?x.stringToBytes(t):g.stringToBytes(t):b(t)?t=Array.prototype.slice.call(t,0):Array.isArray(t)||(t=t.toString());for(var r=m.bytesToWords(t),n=8*t.length,o=1732584193,i=-271733879,a=-1732584194,s=271733878,u=0;u<r.length;u++)r[u]=16711935&(r[u]<<8|r[u]>>>24)|4278255360&(r[u]<<24|r[u]>>>8);r[n>>>5]|=128<<n%32,r[14+(64+n>>>9<<4)]=n;var h=w._ff,l=w._gg,c=w._hh,f=w._ii;for(u=0;u<r.length;u+=16){var p=o,v=i,d=a,y=s;i=f(i=f(i=f(i=f(i=c(i=c(i=c(i=c(i=l(i=l(i=l(i=l(i=h(i=h(i=h(i=h(i,a=h(a,s=h(s,o=h(o,i,a,s,r[u+0],7,-680876936),i,a,r[u+1],12,-389564586),o,i,r[u+2],17,606105819),s,o,r[u+3],22,-1044525330),a=h(a,s=h(s,o=h(o,i,a,s,r[u+4],7,-176418897),i,a,r[u+5],12,1200080426),o,i,r[u+6],17,-1473231341),s,o,r[u+7],22,-45705983),a=h(a,s=h(s,o=h(o,i,a,s,r[u+8],7,1770035416),i,a,r[u+9],12,-1958414417),o,i,r[u+10],17,-42063),s,o,r[u+11],22,-1990404162),a=h(a,s=h(s,o=h(o,i,a,s,r[u+12],7,1804603682),i,a,r[u+13],12,-40341101),o,i,r[u+14],17,-1502002290),s,o,r[u+15],22,1236535329),a=l(a,s=l(s,o=l(o,i,a,s,r[u+1],5,-165796510),i,a,r[u+6],9,-1069501632),o,i,r[u+11],14,643717713),s,o,r[u+0],20,-373897302),a=l(a,s=l(s,o=l(o,i,a,s,r[u+5],5,-701558691),i,a,r[u+10],9,38016083),o,i,r[u+15],14,-660478335),s,o,r[u+4],20,-405537848),a=l(a,s=l(s,o=l(o,i,a,s,r[u+9],5,568446438),i,a,r[u+14],9,-1019803690),o,i,r[u+3],14,-187363961),s,o,r[u+8],20,1163531501),a=l(a,s=l(s,o=l(o,i,a,s,r[u+13],5,-1444681467),i,a,r[u+2],9,-51403784),o,i,r[u+7],14,1735328473),s,o,r[u+12],20,-1926607734),a=c(a,s=c(s,o=c(o,i,a,s,r[u+5],4,-378558),i,a,r[u+8],11,-2022574463),o,i,r[u+11],16,1839030562),s,o,r[u+14],23,-35309556),a=c(a,s=c(s,o=c(o,i,a,s,r[u+1],4,-1530992060),i,a,r[u+4],11,1272893353),o,i,r[u+7],16,-155497632),s,o,r[u+10],23,-1094730640),a=c(a,s=c(s,o=c(o,i,a,s,r[u+13],4,681279174),i,a,r[u+0],11,-358537222),o,i,r[u+3],16,-722521979),s,o,r[u+6],23,76029189),a=c(a,s=c(s,o=c(o,i,a,s,r[u+9],4,-640364487),i,a,r[u+12],11,-421815835),o,i,r[u+15],16,530742520),s,o,r[u+2],23,-995338651),a=f(a,s=f(s,o=f(o,i,a,s,r[u+0],6,-198630844),i,a,r[u+7],10,1126891415),o,i,r[u+14],15,-1416354905),s,o,r[u+5],21,-57434055),a=f(a,s=f(s,o=f(o,i,a,s,r[u+12],6,1700485571),i,a,r[u+3],10,-1894986606),o,i,r[u+10],15,-1051523),s,o,r[u+1],21,-2054922799),a=f(a,s=f(s,o=f(o,i,a,s,r[u+8],6,1873313359),i,a,r[u+15],10,-30611744),o,i,r[u+6],15,-1560198380),s,o,r[u+13],21,1309151649),a=f(a,s=f(s,o=f(o,i,a,s,r[u+4],6,-145523070),i,a,r[u+11],10,-1120210379),o,i,r[u+2],15,718787259),s,o,r[u+9],21,-343485551),o=o+p>>>0,i=i+v>>>0,a=a+d>>>0,s=s+y>>>0}return m.endian([o,i,a,s])})._ff=function(t,e,r,n,o,i,a){var s=t+(e&r|~e&n)+(o>>>0)+a;return(s<<i|s>>>32-i)+e},w._gg=function(t,e,r,n,o,i,a){var s=t+(e&n|r&~n)+(o>>>0)+a;return(s<<i|s>>>32-i)+e},w._hh=function(t,e,r,n,o,i,a){var s=t+(e^r^n)+(o>>>0)+a;return(s<<i|s>>>32-i)+e},w._ii=function(t,e,r,n,o,i,a){var s=t+(r^(e|~n))+(o>>>0)+a;return(s<<i|s>>>32-i)+e},w._blocksize=16,w._digestsize=16,t.exports=function(t,e){if(null==t)throw new Error("Illegal argument "+t);var r=m.wordsToBytes(w(t,e));return e&&e.asBytes?r:e&&e.asString?x.bytesToString(r):m.bytesToHex(r)}});function q(t,e){var r=e.method,n=e.path,o=[r,encodeURI(n)];["date","policy","contentMd5"].forEach(function(t){e[t]&&o.push(e[t])});var i=b(t.password,o.join("&"));return"UPYUN "+t.operatorName+":"+i}function I(t,e){if(!(t instanceof e))throw new TypeError("Cannot call a class as a function")}var T={genSign:q,getHeaderSign:function(t,e,r){var n=3<arguments.length&&void 0!==arguments[3]?arguments[3]:null,o=(new Date).toGMTString();return{Authorization:q(t,{method:e,path:r="/"+t.serviceName+r,date:o,contentMd5:n}),"X-Date":o}},getPolicyAndAuthorization:function(t,e){if(e.service=t.serviceName,void 0===e["save-key"])throw new Error("upyun - calclate body sign need save-key");void 0===e.expiration&&(e.expiration=parseInt(new Date/1e3+1800,10));var r=x.encode(JSON.stringify(e));return{policy:r,authorization:q(t,{method:"POST",path:"/"+t.serviceName,policy:r,contentMd5:e["content-md5"]})}},getPurgeHeaderSign:function(t,e){var r=(new Date).toGMTString(),n=e.join("\n"),o=P(n+"&"+t.serviceName+"&"+r+"&"+t.password);return{Authorization:"UpYun "+t.serviceName+":"+t.operatorName+":"+o,Date:r,"User-Agent":"Js-Sdk/"+w}}};function U(t,e){for(var r=0;r<e.length;r++){var n=e[r];n.enumerable=n.enumerable||!1,n.configurable=!0,"value"in n&&(n.writable=!0),Object.defineProperty(t,n.key,n)}}var K=function(t,e){if(Array.isArray(t))return t;if(Symbol.iterator in Object(t))return function(t,e){var r=[],n=!0,o=!1,i=void 0;try{for(var a,s=t[Symbol.iterator]();!(n=(a=s.next()).done)&&(r.push(a.value),!e||r.length!==e);n=!0);}catch(t){o=!0,i=t}finally{try{!n&&s.return&&s.return()}finally{if(o)throw i}}return r}(t,e);throw new TypeError("Invalid attempt to destructure non-iterable instance")};function W(t){var e=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{},r=2<arguments.length&&void 0!==arguments[2]?arguments[2]:null;if(I(this,W),void 0===t.serviceName)throw new Error("upyun - must config serviceName");if("function"==typeof e&&(r=e,e={}),"function"!=typeof r&&s)throw new Error("upyun - must config a callback function getHeaderSign in client side");if(!s&&(void 0===t.operatorName||void 0===t.password))throw new Error("upyun - must config operateName and password in server side");var n=Object.assign({domain:"v0.api.upyun.com",protocol:"https"},e);this.endpoint=n.protocol+"://"+n.domain;var o=n.proxy;this.proxy=o,this.req=function(t,o,i){var e=(3<arguments.length&&void 0!==arguments[3]?arguments[3]:{}).proxy,r=f.create({baseURL:t+"/"+o.serviceName,maxRedirects:0,proxy:e});return r.interceptors.request.use(function(e){var t=e.method.toUpperCase(),r=y.resolve("/",e.url||"");0===r.indexOf(e.baseURL)&&(r=r.substring(e.baseURL.length)),e.url=encodeURI(e.url);var n=i(o,t,r,e.headers["Content-MD5"]);return(n=p(n)?n:Promise.resolve(n)).then(function(t){return e.headers.common=t,Promise.resolve(e)})},function(t){throw new Error("upyun - request failed: "+t.message)}),r.interceptors.response.use(function(t){return t},function(t){var e=t.response;if(void 0===e)throw t;if(404!==e.status)throw new Error("upyun - response error: "+t.message);return e}),r}(this.endpoint,t,r||$,{proxy:o}),this.bucket=t,this.service=t,s||this.setBodySignCallback(T.getPolicyAndAuthorization)}function Y(t){return 0===t.indexOf("x-upyun-meta-")}function $(){return T.getHeaderSign.apply(T,arguments)}function X(t){var e=1<arguments.length&&void 0!==arguments[1]?arguments[1]:"",r=2<arguments.length&&void 0!==arguments[2]?arguments[2]:"";I(this,X),this.bucketName=t,this.serviceName=this.bucketName,this.operatorName=e,this.password=P(r)}return{Client:(function(t,e,r){return e&&U(t.prototype,e),r&&U(t,r),t}(W,[{key:"setService",value:function(t){this.service=t,this.req.defaults.baseURL=this.endpoint+"/"+t.serviceName}},{key:"setBucket",value:function(t){return this.setService(t)}},{key:"setBodySignCallback",value:function(t){if("function"!=typeof t)throw new Error("upyun - getBodySign should be a function");this.bodySignCallback=t}},{key:"usage",value:function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:"/";return this.req.get(t+"?usage").then(function(t){var e=t.data;return Promise.resolve(e)})}},{key:"listDir",value:function(){var t=0<arguments.length&&void 0!==arguments[0]?arguments[0]:"/",e=1<arguments.length&&void 0!==arguments[1]?arguments[1]:{},r=e.limit,n=void 0===r?100:r,o=e.order,i=void 0===o?"asc":o,a=e.iter,s=void 0===a?"":a,u={};return 100!==n&&(u["x-list-limit"]=n),"asc"!==i&&(u["x-list-order"]=i),s&&(u["x-list-iter"]=s),this.req.get(t,{headers:u}).then(function(t){var e=t.data,r=t.headers;if(404===t.status)return!1;var n=r["x-upyun-list-iter"];if(!e)return Promise.resolve({files:[],next:n});var o=e.split("\n").map(function(t){var e=t.split("\t"),r=K(e,4),n=r[0],o=r[1],i=r[2],a=r[3];return{name:n,type:o,size:parseInt(i),time:parseInt(a)}});return Promise.resolve({files:o,next:n})})}},{key:"putFile",value:function(t,e){var r=2<arguments.length&&void 0!==arguments[2]?arguments[2]:{},n=["Content-MD5","Content-Length","Content-Type","Content-Secret","x-gmkerl-thumb"],o={},i={},a=!0,s=!1,u=void 0;try{for(var h,l=Object.keys(r)[Symbol.iterator]();!(a=(h=l.next()).done);a=!0){var c=h.value;i[c.toLowerCase()]=r[c]}}catch(t){s=!0,u=t}finally{try{!a&&l.return&&l.return()}finally{if(s)throw u}}var f=!0,p=!1,v=void 0;try{for(var d,y=Object.keys(i)[Symbol.iterator]();!(f=(d=y.next()).done);f=!0){var m=d.value;Y(m)&&i[m]?o[m]=i[m]:n.forEach(function(t){var e=t.toLowerCase(),r=i[e];r&&(o[t]=r)})}}catch(t){p=!0,v=t}finally{try{!f&&y.return&&y.return()}finally{if(p)throw v}}return this.req.put(t,e,{headers:o}).then(function(t){var r=t.headers;if(200!==t.status)return Promise.resolve(!1);var n={};return["x-upyun-width","x-upyun-height","x-upyun-file-type","x-upyun-frames"].forEach(function(t){var e=t.split("x-upyun-")[1];r[t]&&(n[e]=r[t],"file-type"!==e&&(n[e]=parseInt(n[e],10)))}),Promise.resolve(!(0<Object.keys(n).length)||n)})}},{key:"initMultipartUpload",value:function(t,e){var r=this,n=void 0,o=function(t){var e={},r=!0,n=!1,o=void 0;try{for(var i,a=Object.keys(t)[Symbol.iterator]();!(r=(i=a.next()).done);r=!0){var s=i.value;e[s.toLowerCase()]=t[s]}}catch(t){n=!0,o=t}finally{try{!r&&a.return&&a.return()}finally{if(n)throw o}}return e}(2<arguments.length&&void 0!==arguments[2]?arguments[2]:{}),i=o["x-upyun-multi-type"];return i=s?(n=Promise.resolve(e.size),i||e.type):(n=g.getFileSizeAsync(e),i||g.getContentType(e)),n.then(function(n){return Object.assign(o,{"x-upyun-multi-disorder":!0,"x-upyun-multi-stage":"initiate","x-upyun-multi-length":n,"x-upyun-multi-type":i}),r.req.put(t,null,{headers:o}).then(function(t){var e=t.headers;if(204!==t.status)return Promise.resolve(!1);var r=e["x-upyun-multi-uuid"];return Promise.resolve({fileSize:n,partCount:Math.ceil(n/u),uuid:r})})})}},{key:"multipartUpload",value:function(e,r,n,o){var i=this,a=o*u;return(s?Promise.resolve(r.size):g.getFileSizeAsync(r)).then(function(t){var e=Math.min(a+u,t);return g.readBlockAsync(r,a,e)}).then(function(t){return i.req.put(e,t,{headers:{"x-upyun-multi-stage":"upload","x-upyun-multi-uuid":n,"x-upyun-part-id":o}}).then(function(t){var e=t.status;return Promise.resolve(204===e)})})}},{key:"completeMultipartUpload",value:function(t,e){return this.req.put(t,null,{headers:{"x-upyun-multi-stage":"complete","x-upyun-multi-uuid":e}}).then(function(t){var e=t.status;return Promise.resolve(204===e||201===e)})}},{key:"makeDir",value:function(t){return this.req.post(t,null,{headers:{folder:"true"}}).then(function(t){var e=t.status;return Promise.resolve(200===e)})}},{key:"headFile",value:function(t){return this.req.head(t).then(function(t){var r=t.headers;if(404===t.status)return Promise.resolve(!1);var n={"Content-Md5":r["content-md5"]||""};return["x-upyun-file-type","x-upyun-file-size","x-upyun-file-date"].forEach(function(t){var e=t.split("x-upyun-file-")[1];r[t]&&(n[e]=r[t],"size"!==e&&"date"!==e||(n[e]=parseInt(n[e],10)))}),Promise.resolve(n)})}},{key:"deleteFile",value:function(t){var e={};return 1<arguments.length&&void 0!==arguments[1]&&arguments[1]&&(e["x-upyun-async"]=!0),this.req.delete(t,{headers:e}).then(function(t){var e=t.status;return Promise.resolve(200===e)})}},{key:"deleteDir",value:function(){for(var t=arguments.length,e=Array(t),r=0;r<t;r++)e[r]=arguments[r];return this.deleteFile.apply(this,e)}},{key:"getFile",value:function(t){var e=1<arguments.length&&void 0!==arguments[1]?arguments[1]:null;if(e&&s)throw new Error("upyun - save as stream are only available on the server side.");return this.req({method:"GET",url:t,responseType:e?"stream":null}).then(function(t){if(404===t.status)return Promise.resolve(!1);if(!e)return Promise.resolve(t.data);var r=t.data.pipe(e);return new Promise(function(t,e){r.on("finish",function(){return t(r)}),r.on("error",e)})})}},{key:"updateMetadata",value:function(t,e){var r=2<arguments.length&&void 0!==arguments[2]?arguments[2]:"merge",n={};for(var o in e)Y(o)?n[o]=e:n["x-upyun-meta-"+o]=e[o];return this.req.patch(t+"?metadata="+r,null,{headers:n}).then(function(t){var e=t.status;return Promise.resolve(200===e)})}},{key:"getMetadata",value:function(t){return this.req.get(t).then(function(t){var e=t.headers;if(200!==t.status)return Promise.resolve(!1);var r={};for(var n in e)Y(n)&&(r[n]=e[n]);return Promise.resolve(r)})}},{key:"blockUpload",value:function(h,l){var c=this,t=2<arguments.length&&void 0!==arguments[2]?arguments[2]:{},e=void 0,r=void 0;return r=s?(e=Promise.resolve(l.size),l.type):(e=g.getFileSizeAsync(l),g.getContentType(l)),e.then(function(a){Object.assign(t,{"x-upyun-multi-stage":"initiate","x-upyun-multi-length":a,"x-upyun-multi-type":r});var s=1048576,u=Math.ceil(a/s);return c.req.put(h,null,{headers:t}).then(function(t){for(var e=t.headers,n=e["x-upyun-multi-uuid"],r=e["x-upyun-next-part-id"],o=Promise.resolve(r),i=0;i<u;i++)o=o.then(function(r){var t=r*s,e=Math.min(t+s,a);return g.readBlockAsync(l,t,e).then(function(t){return c.req.put(h,t,{headers:{"x-upyun-multi-stage":"upload","x-upyun-multi-uuid":n,"x-upyun-part-id":r}}).then(function(t){var e=t.headers;return r=e["x-upyun-next-part-id"],Promise.resolve(r)})})});return o.then(function(){return c.req.put(h,null,{headers:{"x-upyun-multi-stage":"complete","x-upyun-multi-uuid":n}}).then(function(t){var e=t.status;return Promise.resolve(204===e||201===e)})})})})}},{key:"formPutFile",value:function(t,e){var r=this,n=2<arguments.length&&void 0!==arguments[2]?arguments[2]:{},o={},i=!0,a=!1,s=void 0;try{for(var u,h=Object.keys(n)[Symbol.iterator]();!(i=(u=h.next()).done);i=!0){var l=u.value;o[l.toLowerCase()]=n[l]}}catch(t){a=!0,s=t}finally{try{!i&&h.return&&h.return()}finally{if(a)throw s}}if("function"!=typeof this.bodySignCallback)throw new Error("upyun - must setBodySignCallback first!");o.service=this.service.serviceName,o["save-key"]=t;var c=this.bodySignCallback(this.service,o);return(c=p(c)?c:Promise.resolve(c)).then(function(t){return function(t,e,r){var n=r.authorization,o=r.policy,i=new FormData;return i.append("authorization",n),i.append("policy",o),"string"==typeof e&&(e=new Blob([e],{type:"text/plain"})),i.append("file",e),f.post(t,i).then(function(t){var e=t.status,r=t.data;return 200===e&&Promise.resolve(r)})}(r.endpoint+"/"+o.service,e,t)})}},{key:"purge",value:function(t){"string"==typeof t&&(t=[t]);var e=T.getPurgeHeaderSign(this.service,t);return f.post("http://purge.upyun.com/purge/","purge="+t.join("\n"),{headers:e,proxy:this.proxy}).then(function(t){var e=t.data;if(0===Object.keys(e.invalid_domain_of_url).length)return!0;throw new Error("some url purge failed "+e.invalid_domain_of_url.join(" "))},function(t){throw new Error("upyun - request failed: "+t.message)})}}]),W),sign:T,Bucket:X,Service:X}});
\ No newline at end of file
diff --git a/package.json b/package.json
index 9244792..2746284 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "upyun",
-  "version": "3.3.8",
+  "version": "3.3.9",
   "description": "UPYUN js sdk",
   "main": "dist/upyun.common.js",
   "module": "dist/upyun.esm.js",