How to Build a Simple HTTP Server Without a Framework in Rust

You build a simple HTTP server in Rust by creating a TCP listener, accepting connections in a loop, and writing a response to the socket stream. This approach uses only the standard library without external frameworks.

use std::net::{TcpListener, TcpStream};
use std::io::Write;

fn main() {
    let listener = TcpListener::bind("127.0.0.1:7878").unwrap();
    for stream in listener.incoming() {
        let mut stream = stream.unwrap();
        let response = "HTTP/1.1 200 OK\r\n\r\nHello, world!";
        write!(stream, "{}", response).unwrap();
    }
}

Building a simple HTTP server without a framework in Rust creates a basic program that waits for web requests on a specific port and sends back a plain text message. It works like a receptionist standing at a door, greeting every visitor who knocks with the same standard reply. You use this when you need to understand how web servers work under the hood or want a lightweight solution without heavy dependencies.