使用Cloudflare Workers反代国外网站
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众所周知,Cloudflare是一个好东西,其免费的CDN加速和Workers功能,令许多事方便了。

这里,我们将使用Cloudflare Workers,反向代理部分国外网站,实现加速或免FQ访问。Cloudflare Workers简介

Cloudflare Workers是一种可以运行JavaScript脚本的边缘节点,可以实现无服务器直接运行JavaScript代码。

    步骤

    1.登录你的Cloudflare账号,并进入到Workers界面(若从未使用过Workers,则需要先设置自定义workers域名,这里略去,格式为xxx.yourname.workers.dev):

    2.新建一个Worker,修改此Worker名称,并将下列JavaScript代码粘贴到代码框中,并保存。

    // Website you intended to retrieve for users.
    const upstream = 'example.com'
     
    // Custom pathname for the upstream website.
    const upstream_path = '/'
     
    // Website you intended to retrieve for users using mobile devices.
    const upstream_mobile = 'example.com'
     
    // Countries and regions where you wish to suspend your service.
    const blocked_region = ['KP', 'SY', 'PK', 'CU']
     
    // IP addresses which you wish to block from using your service.
    const blocked_ip_address = ['0.0.0.0', '127.0.0.1']
     
    // Whether to use HTTPS protocol for upstream address.
    const https = true
     
    // Whether to disable cache.
    const disable_cache = false
     
    // Replace texts.
    const replace_dict = {
        '$upstream': '$custom_domain'
    }
     
    addEventListener('fetch', event => {
        event.respondWith(fetchAndApply(event.request));
    })
     
    async function fetchAndApply(request) {
     
        const region = request.headers.get('cf-ipcountry').toUpperCase();
        const ip_address = request.headers.get('cf-connecting-ip');
        const user_agent = request.headers.get('user-agent');
     
        let response = null;
        let url = new URL(request.url);
        let url_hostname = url.hostname;
     
        if (https == true) {
            url.protocol = 'https:';
        } else {
            url.protocol = 'http:';
        }
     
        if (await device_status(user_agent)) {
            var upstream_domain = upstream;
        } else {
            var upstream_domain = upstream_mobile;
        }
     
        url.host = upstream_domain;
        if (url.pathname == '/') {
            url.pathname = upstream_path;
        } else {
            url.pathname = upstream_path + url.pathname;
        }
     
        if (blocked_region.includes(region)) {
            response = new Response('Access denied: WorkersProxy is not available in your region yet.', {
                status: 403
            });
        } else if (blocked_ip_address.includes(ip_address)) {
            response = new Response('Access denied: Your IP address is blocked by WorkersProxy.', {
                status: 403
            });
        } else {
            let method = request.method;
            let request_headers = request.headers;
            let new_request_headers = new Headers(request_headers);
     
            new_request_headers.set('Host', upstream_domain);
            new_request_headers.set('Referer', url.protocol + '//' + url_hostname);
     
            let original_response = await fetch(url.href, {
                method: method,
                headers: new_request_headers
            })
     
            let original_response_clone = original_response.clone();
            let original_text = null;
            let response_headers = original_response.headers;
            let new_response_headers = new Headers(response_headers);
            let status = original_response.status;
            
            if (disable_cache) {
                new_response_headers.set('Cache-Control', 'no-store');
            }
     
            new_response_headers.set('access-control-allow-origin', '*');
            new_response_headers.set('access-control-allow-credentials', true);
            new_response_headers.delete('content-security-policy');
            new_response_headers.delete('content-security-policy-report-only');
            new_response_headers.delete('clear-site-data');
            
            if(new_response_headers.get("x-pjax-url")) {
                new_response_headers.set("x-pjax-url", response_headers.get("x-pjax-url").replace("//" + upstream_domain, "//" + url_hostname));
            }
            
            const content_type = new_response_headers.get('content-type');
            if (content_type != null && content_type.includes('text/html') && content_type.includes('UTF-8')) {
                original_text = await replace_response_text(original_response_clone, upstream_domain, url_hostname);
            } else {
                original_text = original_response_clone.body
            }
            
            response = new Response(original_text, {
                status,
                headers: new_response_headers
            })
        }
        return response;
    }
     
    async function replace_response_text(response, upstream_domain, host_name) {
        let text = await response.text()
     
        var i, j;
        for (i in replace_dict) {
            j = replace_dict[i]
            if (i == '$upstream') {
                i = upstream_domain
            } else if (i == '$custom_domain') {
                i = host_name
            }
     
            if (j == '$upstream') {
                j = upstream_domain
            } else if (j == '$custom_domain') {
                j = host_name
            }
     
            let re = new RegExp(i, 'g')
            text = text.replace(re, j);
        }
        return text;
    }
     
     
    async function device_status(user_agent_info) {
        var agents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];
        var flag = true;
        for (var v = 0; v < agents.length; v++) {
            if (user_agent_info.indexOf(agents[v]) > 0) {
                flag = false;
                break;
            }
        }
        return flag;
    }
    注意:你需要将upstreamupstream_mobile修改为你需要反代的网站域名。

    3.最后,在浏览器中通过你所设置的Workers链接访问

    例如:修改后的Workers名称为test,访问链接为test.yourname.workers.dev

    友巷技术分享建立的反代链接,点这里也行Proxy

    使用Cloudflare Workers反代国外网站 – 友巷技术分享 (hundun.live)

    评论

    1. 神秘人
      Windows Edge 113.0.1774.50
      1 年前
      2023-5-23 16:42:40

      我的评价是不想被墙就单独搞个vps弄这些

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