Common HTTP server usage

This code starts an HTTP server listening on port 3000. It demonstrates basic routing with common responses and handles POST data from standard forms or as JSON. See Bun.serve for details.

server.ts

const server = Bun.serve({
  async fetch(req) {
    const path = new URL(req.url).pathname;

    // respond with text/plain
    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.path));

    // 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}`);