Fast http on Deno

serve.ts

async function serve() {
    const addr = Deno.args[0] || "127.0.0.1:4500";
    const [hostname, port] = addr.split(":");
    const listener = Deno.listen({ hostname, port: Number(port) });
    const response = new TextEncoder().encode(
        "HTTP/1.1 200 OK\r\nContent-Length: 12\r\n\r\nHello World\n",
    );

    const decoder = new TextDecoder();

    async function handle(conn: Deno.Conn): Promise<void> {
        if(!conn) return ;

        let buffer = new Uint8Array(1024);
        try {
            while (true) {
                const r = await conn.read(buffer);
                if (r === null) {
                    break;
                }

                // const text = decoder.decode(buffer);
                // buffer = new Uint8Array(1024);
                // console.log(text)
                await conn.write(response);
            }
        } finally {
            conn.close();
        }
    }

    for await (const conn of listener) {
        handle(conn);
    }
}