這會啟動一個在埠 3000 上監聽的 HTTP 伺服器。它展示了使用許多常見回應的基本路由，並處理來自標準表單或 JSON 的 POST 資料。
請參閱 Bun.serve 以取得詳細資料。
const server = Bun.serve({
async fetch (req) {
const path = new URL(req.url).pathname;
// respond with text/html
if (path === "/") return new Response("Welcome to Bun!");
// redirect
if (path === "/abc") return Response.redirect("/source", 301);
// send back a file (in this case, *this* file)
if (path === "/source") return new Response(Bun.file(import.meta.file));
// respond with JSON
if (path === "/api") return Response.json({ some: "buns", for: "you" });
// receive JSON data to a POST request
if (req.method === "POST" && path === "/api/post") {
const data = await req.json();
console.log("Received JSON:", data);
return Response.json({ success: true, data });
}
// receive POST data from a form
if (req.method === "POST" && path === "/form") {
const data = await req.formData();
console.log(data.get("someField"));
return new Response("Success");
}
// 404s
return new Response("Page not found", { status: 404 });
}
})
console.log(`Listening on ${server.url}`);