wrapit.js

var http = require('http');
var request = require('request');
var fs = require('fs');
var util = require('util');

process.on('uncaughtException', function(err) {
  console.log(err);
});

var reportError = function(res, err, statusCode) { 
	console.dir(err);
	try {
		res.statusCode = statusCode || 500;
		res.setHeader('Content-Type', 'application/json');
		var message = util.inspect(err);
		if(message.indexOf("Invalid URI") >= 0) { 
			message += '; Make sure to include http:// in the url'; 
		}
		res.end(message);
	} catch(err2) { 
		console.log(err2);
	}
};

exports.wrapit = function(req, res, query) { 
	var method = req.method.toLowerCase();
	if(method != 'get' && method != 'head') {
		reportError(res, 'method ' + method + ' not supported', 405);
	} else {	 
		request[method](query.url, function(err, remoteRes, body) {	
			try {
				if(err) { 
					reportError(res, err);
				} else {
					// pipe the headers
					console.log(req.url);
					console.dir(remoteRes.headers);
					
					for(var h in remoteRes.headers) {						
						res.setHeader(h, remoteRes.headers[h]);
					}
					
					if(query.type) { 
						res.setHeader(h, query.type);
					}

					if(req.method == 'GET') {					
						// &header= sets the header, e.g., &header=provide('uglify-js', function(require, exports, module) {
						if(query.header) { res.write(query.header + '\r\n'); }
						
						// write the headers & body (which we got from url)
						if(body) { res.write(body); }
						
						// &footer= sets the footer, e.g., &footer=});
						if(query.footer) { res.write('\r\n' + query.footer); }
					}
					
					res.end();
				}
			} catch(err) { 
				reportError(res, err);
			}
		});	
	}
};

exports.handleRequest = function(req, res) { 
	var url = require('url').parse(req.url);	
	var query = require('querystring').parse(url.query);
	query.url = query.url || query.u; // pass ?url= or ?u=
	query.footer = query.footer || query.f; // pass &footer= or &f=
	query.header = query.header || query.h; // pass &header= or &h=
	query.type = query.type || query.t;	// pass &type= or &t=
	if(query.url) { 
		// if ?url is supplied, wrap a url
		console.log(query);	
		exports.wrapit(req, res, query);
	} else {	
		// show markdown		
		fs.readFile(__dirname + '/README.markdown', 'utf8', function(err, data){
			if(err) { 
				reportError(res, err);
			} else {
				res.setHeader('Content-Type', 'text/html');
				var html = require("node-markdown").Markdown(data.toString());
				res.write(html);
				res.end();
			}
		});
	}
};