├── LICENSE ├── README.md └── cloudflare-worker.js /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2023 Barret李靖 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # cloudflare-proxy 2 | 3 | > 好多调用 ChatGPT 的客户端都是直接使用的 api.openai.com，这个接口很显然是访问不通的，好在有些良心作者还提供了一个自定义 API 域名的入口，在 Cloudflare Worker 上写了一个简单的代理，用起来顺手多了，省得我一直在本机挂全局代理。—— [Barret李靖](https://twitter.com/Barret_China/status/1642725620798087168) 4 | 5 | 6 | 7 | 8 | 代理请求到 ChatGPT API，代码部署步骤： 9 | 10 | 1. 注册并登录到 Cloudflare 账户 11 | 2. 创建一个新的 Cloudflare Worker 12 | 3. 将 [cloudflare-worker.js](./cloudflare-worker.js) 复制并粘贴到 Cloudflare Worker 编辑器中 13 | 4. 保存并部署 Cloudflare Worker 14 | 5. 在 Worker 详情页 -> Trigger -> Custom Domains 中为这个 Worker 添加一个自定义域名 15 | 16 | 为啥需要第五步？因为直接使用 Cloudflare 的域名，依然无法访问。 17 | 18 | 19 | 20 | ### 使用说明 21 | 22 | ChatGPT 的 API 默认是非流式输出的，如果想让他变成流式输出，需要将 `payload.stream` 设置为 true，大部分的客户端都已经加上了这个参数。 23 | 24 | https://github.com/barretlee/cloudflare-proxy/blob/a7cf8ecfd3eed5c4d76f82f4f4387ed4ef39c6f3/cloudflare-worker.js#L36-L50 25 | 26 | ### License 27 | 28 | [MIT](./LICENSE) 29 | -------------------------------------------------------------------------------- /cloudflare-worker.js: -------------------------------------------------------------------------------- 1 | addEventListener("fetch", (event) => { 2 | event.respondWith(handleRequest(event.request)); 3 | }); 4 | 5 | async function handleRequest(request) { 6 | const url = new URL(request.url); 7 | const fetchAPI = request.url.replace(url.host, 'api.openai.com'); 8 | 9 | // 部分代理工具，请求由浏览器发起，跨域请求时会先发送一个 preflight 进行检查，也就是 OPTIONS 请求 10 | // 需要响应该请求，否则后续的 POST 会失败 11 | const corsHeaders = { 12 | 'Access-Control-Allow-Origin': '*', 13 | 'Access-Control-Allow-Methods': 'OPTIONS', 14 | 'Access-Control-Allow-Headers': '*', 15 | }; 16 | if (request.method === 'OPTIONS') return new Response(null, { headers: corsHeaders }); 17 | 18 | const authKey = request.headers.get('Authorization'); 19 | if (!authKey) return new Response("Not allowed", { status: 403 }); 20 | 21 | let contentType = request.headers.get('Content-Type') 22 | if (contentType && contentType.startsWith("multipart/form-data")) { 23 | let newRequest = new Request(fetchAPI, request); 24 | return await fetch(newRequest); 25 | } 26 | 27 | let body; 28 | if (request.method === 'POST') body = await request.json(); 29 | 30 | const payload = { 31 | method: request.method, 32 | headers: { 33 | "Content-Type": "application/json", 34 | Authorization: authKey, 35 | }, 36 | body: typeof body === 'object' ? JSON.stringify(body) : '{}', 37 | }; 38 | // 在 Cloudflare 中，HEAD 和 GET 请求带 body 会报错 39 | if (['HEAD', 'GET'].includes(request.method)) delete payload.body; 40 | 41 | // 入参中如果包含了 stream=true，则表现形式为流式输出 42 | const response = await fetch(fetchAPI, payload); 43 | if (body && body.stream !== true) { 44 | const results = await response.json(); 45 | return new Response(JSON.stringify(results), { 46 | status: response.status, 47 | headers: { 48 | "Content-Type": "application/json", 49 | }, 50 | }); 51 | } else { 52 | return new Response(response.body, { 53 | status: response.status, 54 | statusText: response.statusText, 55 | headers: response.headers, 56 | }); 57 | } 58 | } 59 | --------------------------------------------------------------------------------