CloudFlare是国外一家知名的cdn服务商，Workers-Proxy是基于Cloudflare Workers的轻量级Javascript 反向代理。 用户可以在Cloudflare的全球网络上部署反向代理，而无需设置虚拟专用服务器和配置Nginx或Apache。
通过配置地区和 IP 过滤器，你可以根据法律规定在部分国家和地区停用反向代理服务。借助移动端跳转工具，你可以根据用户的设备来分发不同的网站。
使用CloudFlare Workers反代网站教程
Workers特点：
1、建立镜像网站
2、利用Cloudflare的全球网络提高加载速度
3、提高安全性（隐藏网站的IP地址）阻止特定区域或IP地址
4、将移动用户重定向到其他网页
创建就很简单了，就不介绍了，这里分享2个版本的Workers反代代码。
第一个：
// 替换成你想镜像的站点
const upstream = 'url'
// 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 = 'url'
// 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',
'//url': ''
}
//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[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;
}第二个：
// 替换成你想镜像的站点
const upstream = '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 = 'm.google.com'
// 密码访问
const openAuth = false
const username = 'username'
const password = 'password'
// 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',
'//google.com': ''
}
function unauthorized() {
return new Response('Unauthorized', {
headers: {
'WWW-Authenticate': 'Basic realm="goindex"',
'Access-Control-Allow-Origin': '*'
},
status: 401
});
}
function parseBasicAuth(auth) {
try {
return atob(auth.split(' ').pop()).split(':');
} catch (e) {
return [];
}
}
function doBasicAuth(request) {
const auth = request.headers.get('Authorization');
if (!auth || !/^Basic [A-Za-z0-9._~+/-]+=*$/i.test(auth)) {
return false;
}
const [user, pass] = parseBasicAuth(auth);
return user === username && pass === password;
}
async function fetchAndApply(request) {
if (request.method === 'OPTIONS') // allow preflight request
return new Response('', {
status: 200,
headers: {
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Headers': '*',
'Access-Control-Allow-Methods': 'GET, POST, PUT, HEAD, OPTIONS'
}
});
if (openAuth && !doBasicAuth(request)) {
return unauthorized();
}
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;
}
addEventListener('fetch', event => {
event.respondWith(fetchAndApply(event.request).catch(err => {
console.error(err);
new Response(JSON.stringify(err.stack), {
status: 500,
headers: {
'Content-Type': 'application/json'
}
});
}));
})
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;
}
