cf反代跳出cf加速域名

dachun 大佬有话说 :

cf反代跳出cf加速域名

aDomain.com通过cfworkers反代 bDomain.com，当我访问aDomain.com首页是正常的，但是点击网页的内容就跳出了aDomain.com到 bDomain.com
即:无法访问此网站，bDomain.com 的响应时间过长。

突发奇想头一回搞这个，求mjj指点一下:)

// 替换成你想镜像的站点
const upstream = ‘www.google.com’

// 如果那个站点有专门的移动适配站点，否则保持和上面一致
const upstream_mobile = ‘www.google.com’

// 你希望禁止哪些国家访问
const blocked_region = [‘RU’]

// 禁止自访问
const blocked_ip_address = [‘0.0.0.0’, ‘127.0.0.1’]

// 替换成你想镜像的站点
const replace_dict = {
    ‘$upstream’: ‘$custom_domain’,
    ‘//www.google.com’: ”
}

//以下内容都不用动
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_host = url.host;

    if (url.protocol == ‘http:’) {
      url.protocol = ‘https:’
      response = Response.redirect(url.href);
      return response;
    }

    if (await device_status(user_agent)) {
      upstream_domain = upstream
    } else {
      upstream_domain = upstream_mobile
    }

    url.host = upstream_domain;

    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.href);

      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;

      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’);

      const content_type = new_response_headers.get(‘content-type’);
      if (content_type.includes(‘text/html’) && content_type.includes(‘UTF-8’)) {
            original_text = await replace_response_text(original_response_clone, upstream_domain, url_host);
      } 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
      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) > 0) {
            flag = false;
            break;
      }
    }
    return flag;
}

1NIAN 大佬有话说 :

问问chatgpt