Coming to Rust from C

A Practical Guide

Core
2026-04-17T12:05:42+00:00
Build a basic single-threaded Rust web server using TcpListener and TcpStream to handle HTTP requests.

Use TcpListener::bind to listen on a port and TcpStream to handle incoming connections in a loop.

use std::net::{TcpListener, TcpStream};
use std::io::{BufReader, prelude::*};

fn main() {
    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();

    for stream in listener.incoming() {
        let stream = stream.unwrap();
        handle_connection(stream);
    }
}

fn handle_connection(mut stream: TcpStream) {
    let buf_reader = BufReader::new(&stream);
    let http_request: Vec<_> = buf_reader
        .lines()
        .map(|result| result.unwrap())
        .take_while(|line| !line.is_empty())
        .collect();

    let response = "HTTP/1.1 200 OK\r\n\r\n";
    stream.write_all(response.as_bytes()).unwrap();
}