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pub mod threadpool {
use std::{
thread,
sync::{mpsc, Arc, Mutex},
};
pub struct ThreadPool {
workers: Vec<Worker>,
sender: Option<mpsc::Sender<Job>>,
}
type Job = Box<dyn FnOnce() + Send + 'static>;
impl ThreadPool {
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 {
println!("Worker {id} online");
let thread = thread::spawn(move || loop {
let message = receiver.lock().expect("Lock's been poisoned, another thread panicked").recv();
match message {
Ok(job) => {
job();
}
Err(_) => {
println!("Worker {id} disconnected, shutting down");
break;
}
}
});
Worker {
id,
thread: Some(thread),
}
}
}
}
pub mod websrv {
use std::{
fs,
io::{BufReader,BufRead, Write},
net::{TcpListener, TcpStream},
collections::HashMap,
fmt,
};
use config::Config;
pub struct WebsrvConfig {
pub nbr_of_threads: usize,
pub bind_addr: String,
pub root_folder: String,
}
impl WebsrvConfig {
pub fn from_file(filename: &str) -> WebsrvConfig {
let cfg = Config::builder()
.add_source(config::File::with_name(filename))
.build()
.unwrap();
let cfg = cfg.try_deserialize::<HashMap<String, String>>().expect("Could not deserialize configuration");
let nbr_of_threads: usize = cfg
.get("threads")
.expect("Threads not found in config")
.parse()
.unwrap();
let default_bind_addr = String::from("0.0.0.0:7878");
let bind_addr = cfg
.get("bind_addr")
.unwrap_or(&default_bind_addr)
.to_string();
let default_root_folder = String::from("./html");
let root_folder = cfg
.get("root_folder")
.unwrap_or(&default_root_folder)
.to_string();
let ret_value = WebsrvConfig {
nbr_of_threads: nbr_of_threads,
bind_addr: bind_addr,
root_folder: root_folder,
};
return ret_value;
}
}
impl fmt::Display for WebsrvConfig {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "Number_of_threads : {}, bind_addr : {}, root_folder : {}",
self.nbr_of_threads,
self.bind_addr,
self.root_folder)
}
}
pub fn run_server(cfg: WebsrvConfig) {
println!("==== Squi's Tiny Web Server ====");
println!("Starting with configuration: ");
println!("{}", cfg);
let listener = TcpListener::bind(cfg.bind_addr).unwrap();
let pool = crate::threadpool::ThreadPool::new(cfg.nbr_of_threads);
for stream in listener.incoming() {
let stream = stream.unwrap();
let peer_addr = stream.peer_addr().unwrap();
println!("INFO : Got a connection from {:?}", peer_addr);
let root_f = cfg.root_folder.clone();
pool.execute(move || {
handle_connection(stream, root_f.as_str());
});
}
println!("Shutting down.");
}
fn search_page(page: &String, root_folder: &str) -> Option<Vec<u8>> {
if !page.contains('.') {
let possible_pagenames = vec![format!("{page}.html"), format!("{page}.htm")];
for p in possible_pagenames {
match fs::read(format!("{root_folder}/{p}")) {
Ok(c) => return Some(c),
Err(_) => (),
}
}
return None;
} else {
match fs::read(format!("{root_folder}/{page}")) {
Ok(c) => return Some(c),
Err(_) => return None,
};
}
}
fn analyze_request_line(line: Vec<&str>, root_folder: &str) -> Vec<u8> {
let _req = String::from(line[0]);
let mut page = String::from(line[1]);
let proto = String::from(line[2]);
let mut ret_code = "404 NOT FOUND";
if &page != "/" {
page.remove(0);
} else {
page = String::from("index");
}
let mut content = match search_page(&page, root_folder) {
Some(c) => {
*&mut ret_code = "200 OK";
c
},
None => {
fs::read("./html/err_pages/404.html").unwrap_or(String::from("404 NOT FOUND GET LOST").as_bytes().to_vec())
},
};
let length = content.len();
match String::from_utf8(content.clone()) {
Ok(c) => {
let length = c.len();
let returned_line = format!(
"{proto} {ret_code}\r\nContent-Length: {length}\r\n\r\n{c}"
);
let returned_line = returned_line.as_bytes().to_vec();
return returned_line;
},
Err(_) => (),
};
let img_format = if page.ends_with(".jpg") || page.ends_with(".jpeg") {
"jpg"
} else {
"png"
};
let returned_line = format!(
"{proto} {ret_code}\r\ncontent-type: image/{img_format}\r\ncontent-length: {length}\r\n\r\n"
);
let mut returned_line = returned_line.as_bytes().to_vec();
returned_line.append(&mut content);
return returned_line;
}
fn handle_connection(mut stream: TcpStream, root_folder: &str) {
let buf_reader = BufReader::new(&mut stream);
let mut req_lines = buf_reader.lines();
let request = match req_lines.next() {
Some(c) => c,
None => Ok(String::from("No request")),
};
let request = request.unwrap();
println!("INFO: Received request {:?}", request);
if &request != "No request" {
let request_analyze: Vec<&str> = request.split_whitespace().collect();
let ret_line = analyze_request_line(request_analyze, root_folder);
let payload: &[u8] = &ret_line;
stream.write_all(payload).unwrap();
}
}
}