65 lines
2.0 KiB
JavaScript
65 lines
2.0 KiB
JavaScript
/**
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* Grok2API Cloudflare Worker Proxy
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*
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* 功能：
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* 1. 代理请求到后端 grok2api 实例
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* 2. 处理 CORS 跨域请求
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* 3. 支持 Server-Sent Events (SSE) 流式返回
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*/
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const BACKEND_URL = "https://your-grok2api-instance.com"; // 替换为你的后端地址
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const API_KEY = ""; // 可选：如果后端开启了认证，可以在这里硬编码或通过 KV/环境变量传入
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export default {
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async fetch(request, env, ctx) {
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const url = new URL(request.url);
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const targetUrl = new URL(url.pathname + url.search, BACKEND_URL);
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// 处理 OPTIONS 预检请求
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if (request.method === "OPTIONS") {
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return handleOptions(request);
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}
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const newRequest = new Request(targetUrl, {
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method: request.method,
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headers: new Headers(request.headers),
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body: request.body,
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redirect: "follow",
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});
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// 如果后端需要 API Key，可以在这里注入
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// if (API_KEY) {
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// newRequest.headers.set("Authorization", `Bearer ${API_KEY}`);
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// }
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try {
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const response = await fetch(newRequest);
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// 克隆响应以修改头部（例如 CORS）
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const newResponse = new Response(response.body, response);
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newResponse.headers.set("Access-Control-Allow-Origin", "*");
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newResponse.headers.set("Access-Control-Allow-Methods", "GET, POST, OPTIONS, DELETE, PUT");
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newResponse.headers.set("Access-Control-Allow-Headers", "*");
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return newResponse;
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} catch (e) {
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return new Response(JSON.stringify({ error: "Proxy connection failed", detail: e.message }), {
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status: 502,
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headers: { "Content-Type": "application/json", "Access-Control-Allow-Origin": "*" },
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});
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}
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},
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};
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function handleOptions(request) {
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return new Response(null, {
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status: 204,
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headers: {
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"Access-Control-Allow-Origin": "*",
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"Access-Control-Allow-Methods": "GET, POST, OPTIONS, DELETE, PUT",
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"Access-Control-Allow-Headers": "*",
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"Access-Control-Max-Age": "86400",
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},
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});
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}
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