src/main.rs

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

use itertools::Itertools;

fn main() {
    let listener = TcpListener::bind("127.0.0.1:4221").unwrap();

    for stream in listener.incoming() {
        match stream {
            Ok(mut _stream) => {
                println!("accepted new connection");

                let mut request: Vec<Vec<char>> = vec![vec![]];
                let mut part: usize = 0;

                loop {
                    let mut buf: [u8; 1] = [0; 1];
                    _stream.read_exact(&mut buf).unwrap();

                    if buf[0] == b' ' {
                        part += 1;
                        request.push(vec![]);
                    } else {
                        request[part].push(buf[0].into());
                    }

                    if part == 2 {
                        break;
                    }
                }

                let unparsed_path = request[1].iter().collect::<String>();
                let mut path = unparsed_path.split("/");

                let response_status: String;
                let mut response_headers: Vec<String> = vec![];
                let response_body: String;

                // println!("{:?}", path);

                // println!("{:?}", path);

                path.next().unwrap();

                match path.next().unwrap() {
                    "" => {
                        response_status = "200 OK".to_owned();
                        response_body = "".to_owned();
                    },
                    "echo" => {
                        response_status = "200 OK".to_owned();
                        response_body = path.join("/");
                        response_headers.push("Content-Type: text/plain".to_owned());
                        response_headers.push(format!("Content-Length: {}", response_body.len()));
                    },
                    _ => {
                        response_status = "404 Not Found".to_owned();
                        response_body = "".to_owned();
                    }
                }

                _stream.write(format!("HTTP/1.1 {response_status}\r\n{}\r\n\r\n{response_body}\r\n", response_headers.join("\r\n")).as_bytes()).unwrap();
            }
            Err(e) => {
                println!("error: {}", e);
            }
        }
    }
}