rust 多线程web server

 

use std::iter::StepBy;
use std::thread;
use std::net::{TcpStream,TcpListener};
use std::fs;
use std::io::{BufReader, BufRead, Write};
use std::io::prelude;
use std::sync::mpsc;
use std::sync::Arc;
use std::sync::Mutex;
use std::time::Duration;

type Jobs = Box;

struct ThreadPool {
    workers: Vec,
    sender: mpsc::Sender
}

impl ThreadPool {
    fn new(size: usize) -> ThreadPool {
        assert!(size > 0);
        let (sender,receiver) = mpsc::channel();
        let receiver = Arc::new(Mutex::new(receiver));
        let mut workers = Vec::with_capacity(size);

        for id in 0..size {
            workers.push(Worker::new(id,Arc::clone(&receiver)));
        }
        
        ThreadPool { workers, sender }
    }

    fn exectue(&self,f: F)
    where F: FnOnce() + Send + 'static,
    {
        let job = Box::new(f);
        self.sender.send(job).unwrap();
    }
}


struct Worker {
    id: usize,
    thread: thread::JoinHandle<()>
}

impl Worker {
    fn new(id: usize, receiver: Arc>>) -> Worker {
        let thread = thread::spawn(move||loop {
            let job = receiver.lock().unwrap().recv().unwrap();
            println!("✅ Thread id: {id} Executing ");
            job();
        });
        
        Worker { id , thread }
    }
}

fn main() {
    let listener = TcpListener::bind("127.0.0.1:4399").unwrap();
    let number = 86;
    let pool = ThreadPool::new(number);

    println!(": Total number of threads: {number}");
    for stream in listener.incoming() {
        let stream = stream.unwrap();
        pool.exectue(|| {
            connection(stream);
        });
    }
}

fn connection(mut stream: TcpStream) {
    let buf_reader = BufReader::new(&mut stream);
    let buf_request = buf_reader.lines().next().unwrap().unwrap();
    let (status_line,filename) = match &buf_request[..] {
        "GET / HTTP/1.1" => ("HTTP/1.1 200 Ok","index.html"),
        "GET /fs HTTP/1.1" => {
            thread::sleep(Duration::from_secs(3));
            ("HTTP/1.1 200 Ok","index.html")
        },
        _ => ("HTTP/1.1 404 not found","404.html")
    };

    let SourceCode = fs::read_to_string(filename).unwrap();
    let size = SourceCode.len();
    let respond = format!("{status_line}\r\nContent-Length: {size}\r\n\r\n{SourceCode}");
    stream.write_all(respond.as_bytes()).unwrap();
}

项目结构

project

├── 404.html

├── Cargo.toml

├── index.html

└── src

    └── main.rs

运行效果