diff options
Diffstat (limited to 'src/doc/book/listings/ch20-web-server/no-listing-07-final-code')
6 files changed, 177 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/404.html b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/404.html new file mode 100644 index 000000000..88d8e9152 --- /dev/null +++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/404.html @@ -0,0 +1,11 @@ +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <title>Hello!</title> + </head> + <body> + <h1>Oops!</h1> + <p>Sorry, I don't know what you're asking for.</p> + </body> +</html> diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.lock b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.lock new file mode 100644 index 000000000..f2d069f46 --- /dev/null +++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.lock @@ -0,0 +1,6 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "hello" +version = "0.1.0" + diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.toml b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.toml new file mode 100644 index 000000000..fe619478a --- /dev/null +++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "hello" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/hello.html b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/hello.html new file mode 100644 index 000000000..fe442d6b9 --- /dev/null +++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/hello.html @@ -0,0 +1,11 @@ +<!DOCTYPE html> +<html lang="en"> + <head> + <meta charset="utf-8"> + <title>Hello!</title> + </head> + <body> + <h1>Hello!</h1> + <p>Hi from Rust</p> + </body> +</html> diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/lib.rs b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/lib.rs new file mode 100644 index 000000000..54c0489ab --- /dev/null +++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/lib.rs @@ -0,0 +1,92 @@ +use std::{ + sync::{mpsc, Arc, Mutex}, + thread, +}; + +pub struct ThreadPool { + workers: Vec<Worker>, + sender: Option<mpsc::Sender<Job>>, +} + +type Job = Box<dyn FnOnce() + Send + 'static>; + +impl ThreadPool { + /// Create a new ThreadPool. + /// + /// The size is the number of threads in the pool. + /// + /// # Panics + /// + /// The `new` function will panic if the size is zero. + pub 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: Some(sender), + } + } + + pub fn execute<F>(&self, f: F) + where + F: FnOnce() + Send + 'static, + { + let job = Box::new(f); + + self.sender.as_ref().unwrap().send(job).unwrap(); + } +} + +impl Drop for ThreadPool { + fn drop(&mut self) { + drop(self.sender.take()); + + for worker in &mut self.workers { + println!("Shutting down worker {}", worker.id); + + if let Some(thread) = worker.thread.take() { + thread.join().unwrap(); + } + } + } +} + +struct Worker { + id: usize, + thread: Option<thread::JoinHandle<()>>, +} + +impl Worker { + fn new(id: usize, receiver: Arc<Mutex<mpsc::Receiver<Job>>>) -> Worker { + let thread = thread::spawn(move || loop { + let message = receiver.lock().unwrap().recv(); + + match message { + Ok(job) => { + println!("Worker {id} got a job; executing."); + + job(); + } + Err(_) => { + println!("Worker {id} disconnected; shutting down."); + break; + } + } + }); + + Worker { + id, + thread: Some(thread), + } + } +} diff --git a/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/main.rs b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/main.rs new file mode 100644 index 000000000..3161c2ee5 --- /dev/null +++ b/src/doc/book/listings/ch20-web-server/no-listing-07-final-code/src/main.rs @@ -0,0 +1,51 @@ +use hello::ThreadPool; +use std::fs; +use std::io::prelude::*; +use std::net::TcpListener; +use std::net::TcpStream; +use std::thread; +use std::time::Duration; + +fn main() { + let listener = TcpListener::bind("127.0.0.1:7878").unwrap(); + let pool = ThreadPool::new(4); + + for stream in listener.incoming().take(2) { + let stream = stream.unwrap(); + + pool.execute(|| { + handle_connection(stream); + }); + } + + println!("Shutting down."); +} + +fn handle_connection(mut stream: TcpStream) { + let mut buffer = [0; 1024]; + stream.read(&mut buffer).unwrap(); + + let get = b"GET / HTTP/1.1\r\n"; + let sleep = b"GET /sleep HTTP/1.1\r\n"; + + let (status_line, filename) = if buffer.starts_with(get) { + ("HTTP/1.1 200 OK", "hello.html") + } else if buffer.starts_with(sleep) { + thread::sleep(Duration::from_secs(5)); + ("HTTP/1.1 200 OK", "hello.html") + } else { + ("HTTP/1.1 404 NOT FOUND", "404.html") + }; + + let contents = fs::read_to_string(filename).unwrap(); + + let response = format!( + "{}\r\nContent-Length: {}\r\n\r\n{}", + status_line, + contents.len(), + contents + ); + + stream.write_all(response.as_bytes()).unwrap(); + stream.flush().unwrap(); +} |