tutorials/rust-book
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Add final book project

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This commit is contained in:
Timothy Warren 2019-02-11 13:00:41 -05:00
parent 12b2de3d68
commit c5a08e2226
8 changed files with 279 additions and 123 deletions
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1
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@ -43,6 +43,7 @@
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5
.idea/rust.iml generated
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@ -173,6 +173,10 @@
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@ -191,6 +195,7 @@
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204
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@ -14,51 +14,24 @@
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@ -92,12 +65,6 @@
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@ -143,6 +110,12 @@
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@ -243,6 +209,12 @@
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@ -255,7 +227,7 @@
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@ -284,16 +256,6 @@
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<option name="command" value="run --package advanced_traits --bin advanced_traits" /> <option name="command" value="run --package advanced_traits --bin advanced_traits" />
@ -314,6 +276,16 @@
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@ -333,11 +305,11 @@
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11
hello/404.html Normal file
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@ -0,0 +1,11 @@
<!DOCTYPE html>
<html lang="en">
<head>
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<h1>Oops!</h1>
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7
hello/Cargo.toml Normal file
View File

@ -0,0 +1,7 @@
[package]
name = "hello"
version = "0.1.0"
authors = ["Timothy Warren <twarren@nabancard.com>"]
edition = "2018"
[dependencies]

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<!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>

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use std::fs;
use std::io::prelude::*;
use std::net::TcpStream;
use std::net::TcpListener;
use std::thread;
use std::time::Duration;
use hello::ThreadPool;
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; 512];
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\r\n\r\n", "hello.html")
} else if buffer.starts_with(sleep) {
thread::sleep(Duration::from_secs(5));
("HTTP/1.1 200 OK\r\n\r\n", "hello.html")
} else {
("HTTP/1.1 404 NOT FOUND\r\n\r\n", "404.html")
};
let contents = fs::read_to_string(filename).unwrap();
let response = format!("{}{}", status_line, contents);
stream.write(response.as_bytes()).unwrap();
stream.flush().unwrap();
}

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use std::sync::Arc;
use std::sync::Mutex;
use std::sync::mpsc;
use std::thread;
enum Message {
NewJob(Job),
Terminate,
}
trait FnBox {
fn call_box(self: Box<Self>);
}
impl<F: FnOnce()> FnBox for F {
fn call_box(self: Box<F>) {
(*self)()
}
}
pub struct ThreadPool {
workers: Vec<Worker>,
sender: mpsc::Sender<Message>,
}
type Job = Box<FnBox + 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,
}
}
pub fn execute<F>(&self, f: F)
where
F: FnOnce() + Send + 'static
{
let job = Box::new(f);
self.sender.send(Message::NewJob(job)).unwrap();
}
}
impl Drop for ThreadPool {
fn drop(&mut self) {
println!("Sending terminate message to all workers.");
for _ in &mut self.workers {
self.sender.send(Message::Terminate).unwrap();
}
println!("Shutting down all workers");
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<Message>>>) -> Worker {
let thread = thread::spawn(move|| {
loop {
let message = receiver.lock().unwrap().recv().unwrap();
match message {
Message::NewJob(job) => {
println!("Worker {} got a job; executing.", id);
job.call_box();
},
Message::Terminate => {
println!("Worker {} was told to terminate", id);
break;
},
}
}
});
Worker {
id,
thread: Some(thread),
}
}
}