// ==UserScript==
// @name         我的脚本-修改xhr的请求header
// @namespace    http://tampermonkey.net/
// @version      2024-04-09
// @description  纯js修改xhr的请求header
// @author       You
// @match	     *://*/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        none
// @require      https://cdn.bootcss.com/jquery/2.2.1/jquery.js
// @license MIT
// @downloadURL none
// ==/UserScript==

(function () {
    'use strict';
    debugger;
    console.log("我的油猴脚本!");

    // 原生js修改xhr请求header
    var originalOpen = XMLHttpRequest.prototype.open;
    XMLHttpRequest.prototype.open = function (method, url, async, user, password) {
        this._headers = {};
        this.open = originalOpen.bind(this, method, url, async, user, password);

        var setRequestHeader = this.setRequestHeader;
        this.setRequestHeader = function (header, value) {
            this._headers[header.toLowerCase()] = value;
            return setRequestHeader.apply(this, arguments);
        };

        var send = this.send;
        this.send = function (body) {
            // 在这里添加你想要的header
            this.setRequestHeader("accept-language", "en-US");
            return send.apply(this, arguments);
        };

        this.open(method, url, async, user, password);
    };
})();