Cloudflare Worker + 域名：零成本搭建私人爬蟲代理池

const UA = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.0.0 Safari/537.36";
const PRESETS = {
 wechat: {
 Referer: "https://mp.weixin.qq.com",
 },
};
const CORS_HEADERS = {
 "Access-Control-Allow-Origin": "*",
 "Access-Control-Allow-Methods": "GET, POST, OPTIONS",
 "Access-Control-Allow-Headers": "Content-Type",
 "Access-Control-Max-Age": "86400",
};
function error(msg, status = 400) {
 return new Response(msg, { status, headers: CORS_HEADERS });
}
function checkToken(req, env) {
 if (!env.TOKEN) return;
 const authHeader = req.headers.get("Authorization") || "";
 const token = authHeader.startsWith("Bearer ")
 ? authHeader.slice(7)
 : new URL(req.url).searchParams.get("token");
 if (token !== env.TOKEN) throw new Error("Unauthorized");
}
async function parseRequest(req) {
 const origin = req.headers.get("origin") || "*";
 let targetURL = "";
 let targetMethod = "GET";
 let targetBody = "";
 let targetHeaders = {};
 let preset = "";
 const method = req.method.toLowerCase();
 if (method === "get") {
 const { searchParams } = new URL(req.url);
 targetURL = searchParams.get("url") || "";
 if (searchParams.has("method")) targetMethod = searchParams.get("method").toUpperCase();
 targetBody = searchParams.get("body") || "";
 if (searchParams.has("headers")) {
 try {
 targetHeaders = JSON.parse(searchParams.get("headers"));
 } catch (_) {
 throw new Error("headers not valid");
 }
 }
 preset = searchParams.get("platform") || searchParams.get("preset") || "";
 } else if (method === "post") {
 const payload = await req.json();
 if (payload.url) targetURL = payload.url;
 if (payload.method) targetMethod = payload.method.toUpperCase();
 if (payload.body) targetBody = payload.body;
 if (payload.headers) targetHeaders = payload.headers;
 preset = payload.platform || payload.preset || "";
 } else {
 throw new Error("Method not implemented");
 }
 if (!targetURL) throw new Error("URL not found");
 if (!/^https?:\/\//.test(targetURL)) throw new Error("URL not valid");
 if (targetMethod === "GET" && targetBody) throw new Error("GET method can't have body");
 if (Object.prototype.toString.call(targetHeaders) !== "[object Object]") {
 throw new Error("Headers not valid");
 }
 if (!targetHeaders["User-Agent"]) targetHeaders["User-Agent"] = UA;
 if (preset in PRESETS) Object.assign(targetHeaders, PRESETS[preset]);
 return { origin, targetURL, targetMethod, targetBody, targetHeaders };
}
export default {
 async fetch(request, env) {
 if (request.method === "OPTIONS") {
 return new Response(null, { status: 204, headers: CORS_HEADERS });
 }
 try {
 checkToken(request, env);
 const { origin, targetURL, targetMethod, targetBody, targetHeaders } = await parseRequest(request);
 const response = await fetch(targetURL, {
 method: targetMethod,
 body: targetBody || undefined,
 headers: targetHeaders,
 });
 return new Response(response.body, {
 status: response.status,
 headers: {
 ...CORS_HEADERS,
 "Access-Control-Allow-Origin": origin,
 "Content-Type": response.headers.get("Content-Type"),
 },
 });
 } catch (err) {
 const status = err.message === "Unauthorized" ? 401 : 400;
 return error(err.message, status);
 }
 },
};

https://proxy.yourdomain.com/?url=https://目標網站.com/路徑

https://proxy.yourdomain.com/?url=https://mp.weixin.qq.com/s/xxxxxx&platform=wechat