[fix] XML/HTML document response of XHR

[optimize] update Upstream packages

package.json

@@ -1,6 +1,6 @@
 {
     "name": "koajax",
-    "version": "3.1.0",
+    "version": "3.1.1",
     "license": "LGPL-3.0",
     "author": "[email protected]",
     "description": "HTTP Client based on Koa-like middlewares",
@@ -50,11 +50,11 @@
         "lint-staged": "^15.2.10",
         "open-cli": "^8.0.0",
         "parcel": "~2.13.2",
-        "prettier": "^3.4.1",
+        "prettier": "^3.4.2",
         "ts-jest": "^29.2.5",
         "ts-node": "^10.9.2",
-        "typedoc": "^0.27.2",
-        "typedoc-plugin-mdn-links": "^4.0.2",
+        "typedoc": "^0.27.4",
+        "typedoc-plugin-mdn-links": "^4.0.4",
         "typescript": "~5.7.2"
     },
     "prettier": {

source/HTTPRequest.ts

@@ -102,12 +102,7 @@ export function requestXHR<B>({
     ...rest
 }: Request): RequestResult<B> {
     const request = new XMLHttpRequest();
-    const header_list =
-        headers instanceof Array
-            ? headers
-            : headers?.[Symbol.iterator] instanceof Function
-              ? [...(headers as Iterable<string[]>)]
-              : Object.entries(headers);
+    const header = new Headers(headers);
     const bodyPromise =
         body instanceof globalThis.ReadableStream
             ? Array.fromAsync(body as ReadableStream).then(
@@ -136,10 +131,18 @@ export function requestXHR<B>({
         };
         request.onerror = request.ontimeout = reject;
 
+        const [MIMEType] = header.get('Accept')?.split(',') || [
+            rest.responseType === 'document'
+                ? 'application/xhtml+xml'
+                : rest.responseType === 'json'
+                  ? 'application/json'
+                  : ''
+        ];
+        if (MIMEType) request.overrideMimeType(MIMEType);
+
         request.open(method, path + '');
 
-        for (const [key, value] of header_list)
-            request.setRequestHeader(key, value);
+        for (const [key, value] of header) request.setRequestHeader(key, value);
 
         Object.assign(request, rest);
 

test/XMLHttpRequest.ts

@@ -21,6 +21,8 @@ export class XMLHttpRequest extends EventTarget {
         this.onreadystatechange?.();
     }
 
+    overrideMimeType(type: string) {}
+
     open(method: Request['method'], URI: string) {
         this.responseURL = URI;