Bun Http Server

Bun HTTP Server

Bun has a built-in high-performance HTTP server via Bun.serve().

Quick Start

const server = Bun.serve({
  port: 3000,
  fetch(req) {
    return new Response("Hello World!");
  },
});

console.log(`Server running at http://localhost:${server.port}`);

Request Handling

Bun.serve({
  fetch(req) {
    const url = new URL(req.url);

    // Method
    console.log(req.method); // GET, POST, etc.

    // Path
    console.log(url.pathname); // /api/users

    // Query params
    console.log(url.searchParams.get("id")); // ?id=123

    // Headers
    console.log(req.headers.get("Content-Type"));

    return new Response("OK");
  },
});

Body Parsing

Bun.serve({
  async fetch(req) {
    // JSON
    const json = await req.json();

    // Form data
    const form = await req.formData();

    // Text
    const text = await req.text();

    // ArrayBuffer
    const buffer = await req.arrayBuffer();

    // Blob
    const blob = await req.blob();

    return new Response("Received");
  },
});

Response Types

Bun.serve({
  fetch(req) {
    const url = new URL(req.url);