更好访问gcc

一点小小hook
当前为 2025-07-31 提交的版本，查看最新版本。
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// ==UserScript==
// @name         更好访问gcc
// @namespace    http://tampermonkey.net/
// @version      1.9
// @description  一点小小hook
// @author       LinXingJun
// @match        *://*.gcc.edu.cn/*
// @grant        none
// @license MIT
// ==/UserScript==

(function () {
    'use strict';

    // 配置重定向规则
    const redirect_url = {
        'nc.gcc.edu.cn': 'nic.gcc.edu.cn',
        'www-cnki-net.vpn.gcc.edu.cn': 'www-cnki-net-s.vpn.gcc.edu.cn',
        'navi-cnki-net-s.vpn.gcc.edu.cn:8118': 'navi.cnki.net'
    };

    const blockblackkeyword = ["vpn","mail"];

    if (window.location.protocol === 'https:') {
        redirect_url['http:'] = 'https:';
    }

    // 当前页面URL替换与跳转
    function handlePageRedirect() {
        let newUrl = location.href;
        for (const [oldKey, newKey] of Object.entries(redirect_url)) {
            if (newUrl.includes(oldKey)) {
                newUrl = newUrl.replace(oldKey, newKey);
                location.replace(newUrl);
                break;
            }
        }
    }

    // 替换页面资源引用
    function replaceResourceUrls() {
        // 需要处理的标签属性
        const targets = [
            { selector: 'a', attr: 'href' },
            { selector: 'img', attr: 'src' },
            { selector: 'script', attr: 'src' },
            { selector: 'link', attr: 'href' }
        ];

        targets.forEach(target => {
            document.querySelectorAll(target.selector).forEach(el => {
                const attrValue = el.getAttribute(target.attr);
                if (attrValue) {
                    for (const [oldKey, newKey] of Object.entries(redirect_url)) {
                        if (attrValue.includes(oldKey)) {
                            el.setAttribute(
                                target.attr,
                                attrValue.replace(oldKey, newKey)
                            );
                            break;
                        }
                    }
                }
            });
        });
    }

    // 屏蔽原生跳转（通过代理 a 标签点击事件）
    function blockNativeRedirects() {
        document.addEventListener('click', (e) => {
            if (e.target.tagName === 'A') {
                const href = e.target.getAttribute('href');
                if (href && !href.startsWith('#')) {
                    e.preventDefault();
                    // 手动处理跳转
                    window.location.href = href;
                }
            }
        });
    }


    //vpn 503的时候重新刷新
    if (document.body.innerText.includes("Server is unable to process client's requests temporarily due to overload or system maintenance")) {
        location.reload();
    }

    if (!blockblackkeyword.some(keyword => location.href.includes(keyword))) {
        // 执行主流程
        handlePageRedirect();
        replaceResourceUrls();
        blockNativeRedirects();

        // 监听DOM变化处理动态内容
        const observer = new MutationObserver(() => {
            replaceResourceUrls();
        });

        observer.observe(document.body, {
            childList: true,
            subtree: true
        });
    }

})();
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