Initial commit

worker.js

@@ -0,0 +1,66 @@
+async function handleRequest(request) {
+  const url = new URL(request.url);
+  const target = url.searchParams.get("url");
+
+  if (!target) {
+    return new Response("Missing `url` parameter", { status: 400 });
+  }
+
+  try {
+    const method = request.method;
+    const headers = new Headers(request.headers);
+
+    // Nếu là JSON mà thiếu charset thì thêm vào để tránh lỗi emoji
+    const contentType = headers.get("Content-Type");
+    if (contentType && contentType.startsWith("application/json") && !contentType.includes("charset")) {
+      headers.set("Content-Type", "application/json; charset=UTF-8");
+    }
+
+    const init = {
+      method,
+      headers,
+      redirect: "follow",
+    };
+
+    if (method !== "GET" && method !== "HEAD") {
+      init.body = request.body;
+    }
+
+    const proxyReq = new Request(target, init);
+    const proxiedRes = await fetch(proxyReq);
+
+    const res = new Response(proxiedRes.body, proxiedRes); // Stream lại y chang
+    const reqAllowHeaders = request.headers.get('Access-Control-Request-Headers');
+    const allowHeaders = reqAllowHeaders ? reqAllowHeaders : 'Content-Type';
+
+    res.headers.set("Access-Control-Allow-Origin", "*");
+    res.headers.set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS, HEAD");
+    res.headers.set("Access-Control-Allow-Headers", allowHeaders);
+
+    return res;
+  } catch (err) {
+    return new Response(`Proxy error: ${err.message}`, { status: 500 });
+  }
+}
+
+function handleOptions(request) {
+  const reqAllowHeaders = request.headers.get("Access-Control-Request-Headers");
+  const allowHeaders = reqAllowHeaders ? reqAllowHeaders : "Content-Type";
+
+  const headers = {
+    "Access-Control-Allow-Origin": "*",
+    "Access-Control-Allow-Methods": "GET, POST, PUT, DELETE, OPTIONS, HEAD",
+    "Access-Control-Allow-Headers": allowHeaders,
+    "Access-Control-Max-Age": "86400",
+  };
+
+  return new Response(null, { status: 204, headers });
+}
+
+addEventListener("fetch", event => {
+  if (event.request.method === "OPTIONS") {
+    event.respondWith(handleOptions(event.request));
+  } else {
+    event.respondWith(handleRequest(event.request));
+  }
+});