119 lines
4.9 KiB
Markdown
119 lines
4.9 KiB
Markdown
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---
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title: 搭建自己的openai api高速反向代理
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tags:
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- AI
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- proxy
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categories:
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- AI
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index_img: /img/2024/1/25/openai.jpg
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banner_img: /img/2024/1/25/openai.jpg
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permalink: /2024/01/25/202401250927/index.html
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date: 2024-01-25 09:27:45
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---
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在去年(2023年),我看到了极客湾的这个视频:[我们做了个能对话的AI派蒙，免费给大家玩!](https://b23.tv/Ap27xLS)
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觉得很有意思,但是由于没有显卡且不敢翻墙,一直没有机会尝试,但最近搞来了一块RTX A2000(目前这卡性价比很低,不推荐),便想着折腾一下
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由于不敢翻墙，只能使用反向代理的方式来访问openai api
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## 准备
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你需要:
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* 一个Cloudflare账户
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* Cloudflare账户中有未被墙的有效域名(若有下一项,则为可选项)
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* 一台高速的非中国大陆服务器(配置不用太高,可选)(若无此项,则上一项为必选)
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* 一个好用的脑子
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## Cloudflare worker
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创建一个Cloudflare worker，并把一下代码塞入其中(代码来自[这里](https://gitee.com/GoGPTAI/ChatGPT-Proxy))
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```
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const TELEGRAPH_URL = 'https://api.openai.com';
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addEventListener('fetch', event => {
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event.respondWith(handleRequest(event.request))
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})
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async function handleRequest(request) {
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const url = new URL(request.url);
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url.host = TELEGRAPH_URL.replace(/^https?:\/\//, '');
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const modifiedRequest = new Request(url.toString(), {
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headers: request.headers,
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method: request.method,
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body: request.body,
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redirect: 'follow'
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});
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const response = await fetch(modifiedRequest);
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const modifiedResponse = new Response(response.body, response);
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// 添加允许跨域访问的响应头
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modifiedResponse.headers.set('Access-Control-Allow-Origin', '*');
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return modifiedResponse;
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}
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```
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使用Cloudflare理论上可以降低被封的概率
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由于workers.dev被墙了,所以需要在“触发器”中换用你的域名(如果有非中国大陆服务器则可以跳过这一步)
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如果你没有非中国大陆服务器,那么这篇文章就结束了
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## 反向代理加速
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众所周知,cloudflare在中国大陆的访问速度极慢,所以可以使用自己的服务器套一层加速
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我这里使用一台香港CN2GIA线路的服务器和nginx做演示
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(或许你可以去导航栏的推广页看看,那里获取会有这种服务器,如果那个页面在你看到的时候还在)
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```nginx
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location ^~ / {
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proxy_pass https://xxx.xxx.workers.dev;
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proxy_set_header Host xxx.xxx.workers.dev;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header REMOTE-HOST $remote_addr;
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proxy_set_header Upgrade $http_upgrade;
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proxy_set_header Connection "upgrade";
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proxy_set_header X-Forwarded-Proto $scheme;
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proxy_http_version 1.1;
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add_header X-Cache $upstream_cache_status;
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add_header Strict-Transport-Security "max-age=31536000";
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add_header Cache-Control no-cache;
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}
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```
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使用面板创建的反向代理是这样的,但是你会发现这是访问显示502
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这是因为Nginx在建立SSL/TLS连接时没有发送服务名到后端服务器，导致导致后端服务器使用错误的证书或拒绝连接，所以需要做以下修改:
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```nginx
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location ^~ / {
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proxy_pass https://xxx.xxx.workers.dev;
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proxy_set_header Host xxx.xxx.workers.dev;
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proxy_set_header X-Real-IP $remote_addr;
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proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
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proxy_set_header REMOTE-HOST $remote_addr;
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proxy_set_header Upgrade $http_upgrade;
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proxy_set_header Connection "upgrade";
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proxy_set_header X-Forwarded-Proto $scheme;
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proxy_http_version 1.1;
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proxy_ssl_server_name on; # 使Nginx在建立SSL/TLS连接时发送服务名到后端服务器
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proxy_ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # 指定Nginx应该使用的SSL/TLS协议版本
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add_header X-Cache $upstream_cache_status;
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add_header Strict-Transport-Security "max-age=31536000";
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add_header Cache-Control no-cache;
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}
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```
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添加了以下两行配置
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```
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proxy_ssl_server_name on; # 使Nginx在建立SSL/TLS连接时发送服务名到后端服务器
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proxy_ssl_protocols TLSv1 TLSv1.1 TLSv1.2; # 指定Nginx应该使用的SSL/TLS协议版本
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```
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访问`://YOURHOSTNAME/v1/chat/completions`
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若出现以下回复就配置成功了
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```json
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{
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"error": {
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"message": "You didn't provide an API key. You need to provide your API key in an Authorization header using Bearer auth (i.e. Authorization: Bearer YOUR_KEY), or as the password field (with blank username) if you're accessing the API from your browser and are prompted for a username and password. You can obtain an API key from https://platform.openai.com/account/api-keys.",
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"type": "invalid_request_error",
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"param": null,
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"code": null
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}
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}
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```
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### 参考文章
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[最新宝塔反代openai官方API开发接口详细搭建教程，解决502 Bad Gateway问题](https://blog.csdn.net/weixin_43227851/article/details/134404942)
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[ChatGPT-Proxy](https://gitee.com/GoGPTAI/ChatGPT-Proxy)
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