介绍
随着Chatgpt的爆火，openai的域名遭到了gfw的重点照顾，中国大陆/香港的IP均无法访问openai api接口。相应的，部分对中国大陆网络友好的服务器也被openai屏蔽。截止今日，腾讯香港，Netcup德国，Kurun洛杉矶均无法正常访问api接口。所以创建反代势在必行。鉴于大多数人不会想去花钱专门买个Openai友好的服务器做反代，所以本文介绍一种白嫖的方法，即使用Cloudflare Worker。
部署流程
1.创建一个Cloudflare Worker
登陆Cloudflare控制面板
点击右侧菜单栏，选择Workers-概述
点击右上角-创建服务
选择启动器-Http处理程序
2.复制代码，反代Api
删除Worker所有自带代码，将下文复制进去
如果文章排版出现问题可以直接访问GITHUB查看源文件
https://gist.github.com/kaze-kaze/bce718399c22424b41f58813c61320af
// Website you intended to retrieve for users.
const upstream = 'api.openai.com'
// Custom pathname for the upstream website.
const upstream_path = '/'
// Website you intended to retrieve for users using mobile devices.
const upstream_mobile = upstream
// Countries and regions where you wish to suspend your service.
const blocked_region = []
// 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,
body: request.body
})
connection_upgrade = new_request_headers.get("Upgrade");
if (connection_upgrade && connection_upgrade.toLowerCase() == "websocket") {
return original_response;
}
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;
}
点击Save and Deploy即可
3.绑定自己的域名
CLoudflare Worker的域名也是被墙照顾的，境外服务器还好，国内的话有可能被DNS污染，所以建议绑定自己的域名进行使用。
前提：域名已经托管在CF处
在 Cloudflare Workers 的管理界面中，点击 “Triggers” 选项卡，然后点击 “Custom Domians” 中的 “Add Custom Domain” 按钮以绑定域名
目前只支持 NS 托管在 Cloudflare 上的域名。
至此大功告成。
附
关于这个Chatgpt我已经水了无数文章了，最后还是推荐使用API配合本站公益站点使用
https://chatgpt.nadph.net
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