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GitHub Images Accept-Language Modifier

修改发送给 GitHub 图片服务器的 Accept-Language 请求头，避免中文用户遇到 429 错误

当前为 2025-04-29 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         GitHub Images Accept-Language Modifier
  3. // @namespace    http://tampermonkey.net/
  4. // @version      1.0
  5. // @description  修改发送给 GitHub 图片服务器的 Accept-Language 请求头，避免中文用户遇到 429 错误
  6. // @author       Codming
  7. // @match        *://*.github.com/*
  8. // @grant        GM_xmlhttpRequest
  9. // @run-at       document-start
  10. // @connect      camo.githubusercontent.com
  11. // @connect      avatars.githubusercontent.com
  12. // ==/UserScript==
  13.  
  14. (function() {
  15.     'use strict';
  16.     
  17.     // 拦截 XMLHttpRequest
  18.     const originalXhrOpen = XMLHttpRequest.prototype.open;
  19.     const originalXhrSetRequestHeader = XMLHttpRequest.prototype.setRequestHeader;
  20.     
  21.     XMLHttpRequest.prototype.open = function(method, url) {
  22.         this._url = url;
  23.         return originalXhrOpen.apply(this, arguments);
  24.     };
  25.     
  26.     XMLHttpRequest.prototype.setRequestHeader = function(header, value) {
  27.         // 检查 URL 是否匹配目标域名
  28.         if (this._url && 
  29.             (this._url.includes('camo.githubusercontent.com') || 
  30.              this._url.includes('avatars.githubusercontent.com'))) {
  31.             
  32.             // 如果是 Accept-Language 头，修改值
  33.             if (header.toLowerCase() === 'accept-language') {
  34.                 value = value.replace('zh-CN', 'en-US').replace('zh;', 'en;');
  35.                 console.log('Modified Accept-Language for:', this._url, 'New value:', value);
  36.             }
  37.         }
  38.         
  39.         return originalXhrSetRequestHeader.call(this, header, value);
  40.     };
  41.     
  42.     // 拦截 fetch 请求
  43.     const originalFetch = window.fetch;
  44.     window.fetch = function(resource, init) {
  45.         const url = resource instanceof Request ? resource.url : resource;
  46.         
  47.         if (url && 
  48.             (url.includes('camo.githubusercontent.com') || 
  49.              url.includes('avatars.githubusercontent.com'))) {
  50.             
  51.             init = init || {};
  52.             init.headers = init.headers || {};
  53.             
  54.             // 创建修改后的 headers
  55.             const newHeaders = new Headers(init.headers);
  56.             
  57.             if (newHeaders.has('accept-language')) {
  58.                 const langValue = newHeaders.get('accept-language');
  59.                 const newLangValue = langValue.replace('zh-CN', 'en-US').replace('zh;', 'en;');
  60.                 newHeaders.set('accept-language', newLangValue);
  61.                 console.log('Modified fetch Accept-Language for:', url, 'New value:', newLangValue);
  62.             }
  63.             
  64.             // 如果 resource 是 Request 对象
  65.             if (resource instanceof Request) {
  66.                 const newRequest = new Request(resource, {
  67.                     headers: newHeaders
  68.                 });
  69.                 return originalFetch.call(this, newRequest, init);
  70.             } else {
  71.                 // 如果是 URL 字符串
  72.                 init.headers = newHeaders;
  73.                 return originalFetch.call(this, resource, init);
  74.             }
  75.         }
  76.         
  77.         return originalFetch.apply(this, arguments);
  78.     };
  79. })();