代码实现高性能服务器

Rust 代码实现高性能服务器

网络模块

处理网络通信和连接管理。

// 网络模块

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

pub struct Server {
    address: String,
}

impl Server {
    pub fn new(address: &str) -> Self {
        Server {
            address: address.to_string(),
        }
    }

    pub fn start(&self) {
        let listener = TcpListener::bind(&self.address).expect("Failed to bind address");

        println!("Server listening on {}", self.address);

        for stream in listener.incoming() {
            match stream {
                Ok(stream) => {
                    thread::spawn(move || {
                        handle_connection(stream);
                    });
                }
                Err(e) => {
                    eprintln!("Error accepting connection: {}", e);
                }
            }
        }
    }
}

fn handle_connection(mut stream: TcpStream) {
    let mut buffer = [0; 1024];
    stream.read(&mut buffer).expect("Failed to read data from stream");

    let response = "HTTP/1.1 200 OK\r\n\r\nHello, world!";
    stream.write(response.as_bytes()).expect("Failed to write response to stream");
    stream.flush().expect("Failed to flush stream");
}

请求处理模块

处理客户端请求并生成响应。

// 请求处理模块

pub struct RequestHandler;

impl RequestHandler {
    pub fn handle_request(request: &[u8]) -> String {
        // 在这里处理请求并生成响应
        // 这里只是一个简单的示例，实际实现会更复杂
        "HTTP/1.1 200 OK\r\n\r\nHello, world!".to_string()
    }
}

在这个模块中，我们定义了一个 RequestHandler 结构体，其中有一个 handle_request 方法，用于处理客户端请求并生成响应。在这个示例中，我们只是返回了一个简单的 HTTP 响应。

线程池模块

管理线程池，用于处理请求。

// 线程池模块

use std::sync::{Arc, Mutex};
use std::thread;
use std::sync::mpsc;

pub struct ThreadPool {
    workers: Vec<Worker>,
    sender: mpsc::Sender<Job>,
}

type Job = Box<dyn FnOnce() + Send + 'static>;

impl ThreadPool {
    pub fn new(size: usize) -> Self {
        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 }
    }

    pub fn execute<F>(&self, f: F)
    where
        F: FnOnce() + Send + 'static,
    {
        let job = Box::new(f);
        self.sender.send(job).expect("Failed to send job to worker");
    }
}

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

impl Worker {
    fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Self {
        let thread = thread::spawn(move || {
            loop {
                let job = receiver.lock().unwrap().recv().unwrap();
                println!("Worker {} got a job; executing.", id);
                job();
            }
        });

        Worker {
            id,
            thread: Some(thread),
        }
    }
}

impl Drop for ThreadPool {
    fn drop(&mut self) {
        for worker in &mut self.workers {
            if let Some(thread) = worker.thread.take() {
                thread.join().unwrap();
            }
        }
    }
}

在这个模块中，我们定义了一个 ThreadPool 结构体，用于管理线程池。我们还定义了一个 Worker 结构体，用于实际处理任务的工作线程。在 ThreadPool 的 execute 方法中，我们将任务发送到线程池中的一个工作线程来执行。

服务器模块

在服务器模块中，我们定义了一个 Server 结构体，负责创建服务器并监听客户端连接。在 run 方法中，我们使用线程池来处理每个连接。当有新的连接到来时，我们将其交给线程池中的一个工作线程来处理。处理连接的方法在 handle_connection 中实现，其中会调用请求处理模块来处理客户端请求并返回响应。

// 服务器模块

use std::net::{TcpListener, TcpStream};
use std::io::{Read, Write};
use std::sync::Arc;
use crate::thread_pool::ThreadPool;

mod request_handler;
mod thread_pool;

pub struct Server {
    listener: TcpListener,
    pool: ThreadPool,
}

impl Server {
    pub fn new(addr: &str, pool_size: usize) -> Self {
        let listener = TcpListener::bind(addr).expect("Failed to bind to address");
        let pool = ThreadPool::new(pool_size);
        Server { listener, pool }
    }

    pub fn run(&self) {
        println!("Server running on {}", self.listener.local_addr().unwrap());

        for stream in self.listener.incoming() {
            let stream = stream.expect("Failed to establish connection");
            let pool = Arc::clone(&self.pool);

            pool.execute(move || {
                Self::handle_connection(stream);
            });
        }
    }

    fn handle_connection(mut stream: TcpStream) {
        let mut buffer = [0; 1024];
        stream.read(&mut buffer).expect("Failed to read from stream");
        let response = request_handler::RequestHandler::handle_request(&buffer);
        stream.write_all(response.as_bytes()).expect("Failed to write to stream");
        stream.flush().expect("Failed to flush stream");
    }
}

fn main() {
    let server = Server::new("127.0.0.1:8080", 4);
    server.run();
}