rust_web_server/server/
mod.rs

1#[cfg(test)]
2pub mod tests;
3#[cfg(test)]
4mod example;
5
6use std::io::prelude::*;
7use std::borrow::Borrow;
8use std::net::{IpAddr, SocketAddr, TcpListener};
9use std::str::FromStr;
10use std::time::Duration;
11
12use crate::request::{METHOD, Request};
13use crate::response::{Response, STATUS_CODE_REASON_PHRASE};
14use crate::app::App;
15use crate::application::Application;
16use crate::core::{New};
17use crate::entry_point::{bootstrap, get_ip_port_thread_count, get_request_allocation_size, set_default_values};
18use crate::header::Header;
19use crate::log::Log;
20use crate::mime_type::MimeType;
21use crate::range::{ContentRange, Range};
22use crate::symbol::SYMBOL;
23use crate::thread_pool::ThreadPool;
24
25pub struct Server {}
26impl Server {
27    pub fn process_request(mut stream: impl Read + Write + Unpin, peer_addr: SocketAddr) -> Vec<u8> {
28        let request_allocation_size = get_request_allocation_size();
29        let mut buffer = vec![0; request_allocation_size as usize];
30        let boxed_read = stream.read(&mut buffer);
31        if boxed_read.is_err() {
32            let message = boxed_read.err().unwrap().to_string();
33            eprintln!("unable to read TCP stream {}", &message);
34
35            let raw_response = Server::bad_request_response(message);
36            let boxed_stream = stream.write(raw_response.borrow());
37            if boxed_stream.is_ok() {
38                stream.flush().unwrap();
39            };
40            return raw_response;
41        }
42
43        boxed_read.unwrap();
44        let request : &[u8] = &buffer;
45
46        // let raw_request = String::from_utf8(Vec::from(request)).unwrap();
47        // println!("\n\n______{}______\n\n", raw_request);
48
49
50        let boxed_request = Request::parse_request(request);
51        if boxed_request.is_err() {
52            let message = boxed_request.err().unwrap();
53            eprintln!("unable to parse request: {}", &message);
54
55            let raw_response = Server::bad_request_response(message);
56            let boxed_stream = stream.write(raw_response.borrow());
57            if boxed_stream.is_ok() {
58                stream.flush().unwrap();
59            };
60            return raw_response;
61        }
62
63
64        let request: Request = boxed_request.unwrap();
65        let (response, request) = App::handle_request(request);
66
67
68        let log_request_response = Log::combined(&request, &response, &peer_addr);
69        println!("{}", log_request_response);
70        let raw_response = Response::generate_response(response, request);
71
72        let boxed_stream = stream.write(raw_response.borrow());
73        if boxed_stream.is_ok() {
74            stream.flush().unwrap();
75        };
76
77        raw_response
78    }
79
80    pub fn bad_request_response(message: String) -> Vec<u8> {
81        let error_request = Request {
82            method: METHOD.get.to_string(),
83            request_uri: "".to_string(),
84            http_version: "".to_string(),
85            headers: vec![],
86            body: vec![],
87        };
88
89        let size = message.chars().count() as u64;
90        let content_range = ContentRange {
91            unit: Range::BYTES.to_string(),
92            range: Range { start: 0, end: size },
93            size: size.to_string(),
94            body: Vec::from(message.as_bytes()),
95            content_type: MimeType::TEXT_PLAIN.to_string(),
96        };
97
98        let header_list = Header::get_header_list(&error_request);
99        let error_response: Response = Response::get_response(
100            STATUS_CODE_REASON_PHRASE.n400_bad_request,
101            Some(header_list),
102            Some(vec![content_range])
103        );
104
105        let response = Response::generate_response(error_response, error_request);
106        return response;
107    }
108
109    pub fn process(mut stream: impl Read + Write + Unpin,
110                   connection: ConnectionInfo,
111                   app: impl Application) -> Result<(), String> {
112        use crate::http::VERSION;
113
114        let request_allocation_size = connection.request_size;
115        let client = connection.client.clone();
116        let client_addr = SocketAddr::new(IpAddr::from_str(client.ip.as_str()).unwrap(), client.port as u16);
117
118        loop {
119            let mut buffer = vec![0; request_allocation_size as usize];
120            let boxed_read = stream.read(&mut buffer);
121            if boxed_read.is_err() {
122                // timeout or client closed — normal end of keep-alive session
123                break;
124            }
125            if boxed_read.unwrap() == 0 {
126                break;
127            }
128
129            let request = match Request::parse(&buffer) {
130                Ok(r) => r,
131                Err(message) => {
132                    let raw_response = Server::bad_request_response(message.clone());
133                    let boxed_stream = stream.write(raw_response.borrow());
134                    if boxed_stream.is_ok() { stream.flush().unwrap(); }
135                    return Err(message);
136                }
137            };
138
139            let keep_alive = {
140                let conn_hdr = request.get_header(Header::_CONNECTION.to_string());
141                match conn_hdr {
142                    Some(h) => h.value.to_lowercase() != "close",
143                    None => request.http_version == VERSION.http_1_1,
144                }
145            };
146
147            let mut response = match app.execute(&request, &connection) {
148                Ok(r) => r,
149                Err(message) => {
150                    let raw_response = Server::bad_request_response(message.clone());
151                    let boxed_stream = stream.write(raw_response.borrow());
152                    if boxed_stream.is_ok() { stream.flush().unwrap(); }
153                    return Err(message);
154                }
155            };
156
157            crate::compression::apply_gzip(&request, &mut response);
158
159            response.headers.push(Header {
160                name: Header::_CONNECTION.to_string(),
161                value: if keep_alive { "keep-alive".to_string() } else { "close".to_string() },
162            });
163
164            let log = Log::combined(&request, &response, &client_addr);
165            println!("{}", log);
166
167            if let Some(ref filepath) = response.stream_file.clone() {
168                if let Err(e) = Server::write_chunked_file(&mut stream, response, request, filepath) {
169                    return Err(e);
170                }
171            } else {
172                let raw_response = Response::generate_response(response, request);
173                if let Err(e) = stream.write(raw_response.borrow()) {
174                    return Err(e.to_string());
175                }
176                stream.flush().unwrap();
177            }
178
179            if !keep_alive { break; }
180        }
181
182        Ok(())
183    }
184
185    /// Streams a file to `stream` using HTTP/1.1 chunked transfer encoding.
186    /// The response headers are written first, then the file is read and written in 64 KB chunks.
187    fn write_chunked_file(
188        stream: &mut impl Write,
189        mut response: Response,
190        request: Request,
191        filepath: &str,
192    ) -> Result<(), String> {
193        use std::fs::File;
194        use std::io::Read as _;
195
196        response.headers.push(Header {
197            name: Header::_TRANSFER_ENCODING.to_string(),
198            value: "chunked".to_string(),
199        });
200
201        // build status line + headers (no body)
202        let status = [
203            response.http_version.clone(),
204            response.status_code.to_string(),
205            response.reason_phrase.clone(),
206        ].join(SYMBOL.whitespace);
207
208        let mut headers_str = SYMBOL.new_line_carriage_return.to_string();
209        for header in &response.headers {
210            headers_str.push_str(&header.name);
211            headers_str.push_str(Header::NAME_VALUE_SEPARATOR);
212            headers_str.push_str(&header.value);
213            headers_str.push_str(SYMBOL.new_line_carriage_return);
214        }
215        let head = format!("{}{}{}", status, headers_str, SYMBOL.new_line_carriage_return);
216
217        stream.write_all(head.as_bytes()).map_err(|e| e.to_string())?;
218
219        if request.method != METHOD.head && request.method != METHOD.options {
220            let mut file = File::open(filepath).map_err(|e| e.to_string())?;
221            let mut buf = vec![0u8; 65536];
222            loop {
223                let n = file.read(&mut buf).map_err(|e| e.to_string())?;
224                if n == 0 { break; }
225                // chunk header: hex size + CRLF
226                stream.write_all(format!("{:x}\r\n", n).as_bytes()).map_err(|e| e.to_string())?;
227                stream.write_all(&buf[..n]).map_err(|e| e.to_string())?;
228                stream.write_all(b"\r\n").map_err(|e| e.to_string())?;
229            }
230            // terminal chunk
231            stream.write_all(b"0\r\n\r\n").map_err(|e| e.to_string())?;
232        }
233
234        stream.flush().map_err(|e| e.to_string())
235    }
236
237    /// Reads configuration (IP, port, thread count, TLS paths) from the layered config system
238    /// and returns a bound `TcpListener` and a sized `ThreadPool`. Call once at startup.
239    pub fn setup() -> Result<(TcpListener, ThreadPool), String> {
240        let info = Log::info("Rust Web Server");
241        println!("{}", info);
242
243        let usage_info = Log::usage_information();
244        println!("{}", usage_info);
245
246
247        println!("RWS Configuration Start: \n");
248
249        set_default_values();
250        bootstrap();
251
252        println!("\nRWS Configuration End\n\n");
253
254
255        let (ip, port, thread_count) = get_ip_port_thread_count();
256
257
258        let mut ip_readable = ip.to_string();
259
260        if ip.contains(":") {
261            ip_readable = [SYMBOL.opening_square_bracket, &ip, SYMBOL.closing_square_bracket].join("");
262        }
263
264        let bind_addr = [ip_readable, SYMBOL.colon.to_string(), port.to_string()].join(SYMBOL.empty_string);
265
266        #[cfg(feature = "http2")]
267        let protocol = {
268            let cert = std::env::var(crate::entry_point::Config::RWS_CONFIG_TLS_CERT_FILE).unwrap_or_default();
269            if cert.is_empty() { "http" } else { "https" }
270        };
271        #[cfg(not(feature = "http2"))]
272        let protocol = "http";
273
274        println!("Setting up {}://{}...", protocol, &bind_addr);
275
276        let boxed_listener = TcpListener::bind(&bind_addr);
277        if boxed_listener.is_err() {
278            let message = format!("unable to set up TCP listener: {}", boxed_listener.err().unwrap());
279            return Err(message);
280        }
281
282        let listener = boxed_listener.unwrap();
283        let pool = ThreadPool::new(thread_count as usize);
284
285
286        let server_url_thread_count = Log::server_url_thread_count(protocol, &bind_addr, thread_count);
287        println!("{}", server_url_thread_count);
288
289        Ok((listener, pool))
290    }
291
292    /// Accepts TCP connections in a loop and dispatches each to the thread pool.
293    /// Blocks forever (plain HTTP/1.1). For TLS/HTTP2/HTTP3 use [`Server::run_tls`].
294    pub fn run(listener : TcpListener,
295               pool: ThreadPool,
296               app: impl Application + New + Send + 'static + Copy) {
297        for boxed_stream in listener.incoming() {
298            if boxed_stream.is_err() {
299                eprintln!("unable to get TCP stream: {}", boxed_stream.err().unwrap());
300                return;
301            }
302
303            let stream = boxed_stream.unwrap();
304
305            print!("Connection established, ");
306
307            let boxed_local_addr = stream.local_addr();
308            if boxed_local_addr.is_ok() {
309                print!("local addr: {}", boxed_local_addr.unwrap())
310            } else {
311                eprintln!("\nunable to read local addr");
312                return;
313            }
314
315            let boxed_peer_addr = stream.peer_addr();
316            if boxed_peer_addr.is_err() {
317                eprintln!("\nunable to read peer addr");
318                return;
319            }
320            let peer_addr = boxed_peer_addr.unwrap();
321            print!(", peer addr: {}\n", peer_addr.to_string());
322
323            let (server_ip, server_port, _thread_count) = get_ip_port_thread_count();
324            let client_ip = peer_addr.ip().to_string();
325            let client_port = peer_addr.port() as i32;
326            let request_allocation_size = get_request_allocation_size();
327
328            let connection = ConnectionInfo {
329                client: Address {
330                    ip: client_ip.to_string(),
331                    port: client_port
332                },
333                server: Address {
334                    ip: server_ip,
335                    port: server_port
336                },
337                request_size: request_allocation_size,
338            };
339
340
341
342            if let Err(e) = stream.set_read_timeout(Some(Duration::from_secs(30))) {
343                eprintln!("failed to set read timeout: {}", e);
344            }
345
346            pool.execute(move || {
347                let boxed_process = Server::process(stream, connection, app);
348                if boxed_process.is_err() {
349                    let message = boxed_process.err().unwrap();
350                    eprintln!("{}", message);
351                }
352            });
353
354        }
355
356
357    }
358
359}
360
361/// Network context for the current connection, passed into every [`Controller`](crate::controller::Controller).
362#[derive(Clone)]
363pub struct ConnectionInfo {
364    /// Client (peer) address.
365    pub client: Address,
366    /// Server (local) address.
367    pub server: Address,
368    /// Bytes allocated for reading the request.
369    pub request_size: i64
370}
371
372/// IP address and port pair.
373#[derive(Clone)]
374pub struct Address {
375    pub ip: String,
376    pub port: i32
377}
378
379#[cfg(feature = "http2")]
380impl Server {
381    pub async fn run_tls(
382        listener: TcpListener,
383        pool: ThreadPool,
384        app: impl Application + New + Send + 'static + Copy,
385    ) {
386        use crate::tls::create_tls_acceptor;
387        use crate::h2_handler;
388
389        let cert_path = std::env::var(crate::entry_point::Config::RWS_CONFIG_TLS_CERT_FILE)
390            .unwrap_or_default();
391        let key_path = std::env::var(crate::entry_point::Config::RWS_CONFIG_TLS_KEY_FILE)
392            .unwrap_or_default();
393
394        if cert_path.is_empty() || key_path.is_empty() {
395            println!("No TLS certificate configured — serving plain HTTP/1.1.");
396            tokio::task::block_in_place(|| Server::run(listener, pool, app));
397            return;
398        }
399
400        let tls_acceptor = match create_tls_acceptor(&cert_path, &key_path) {
401            Ok(a) => a,
402            Err(e) => {
403                eprintln!("TLS setup failed: {}", e);
404                return;
405            }
406        };
407
408        listener
409            .set_nonblocking(true)
410            .expect("failed to set TCP listener to non-blocking");
411        let tokio_listener = tokio::net::TcpListener::from_std(listener)
412            .expect("failed to convert TCP listener to tokio");
413
414        println!("Listening for TLS connections (HTTP/1.1 + HTTP/2)...");
415
416        loop {
417            tokio::select! {
418                result = tokio_listener.accept() => {
419                    match result {
420                        Ok((tcp_stream, peer_addr)) => {
421                            let acceptor = tls_acceptor.clone();
422                            tokio::spawn(async move {
423                                match acceptor.accept(tcp_stream).await {
424                                    Ok(tls_stream) => {
425                                        let protocol = tls_stream
426                                            .get_ref()
427                                            .1
428                                            .alpn_protocol()
429                                            .map(|p| p.to_vec());
430
431                                        match protocol.as_deref() {
432                                            Some(b"h2") => {
433                                                if let Err(e) =
434                                                    h2_handler::handle_connection(tls_stream, peer_addr, app)
435                                                        .await
436                                                {
437                                                    eprintln!("H2 connection error: {}", e);
438                                                }
439                                            }
440                                            _ => {
441                                                if let Err(e) =
442                                                    Server::process_h1_tls(tls_stream, peer_addr, app).await
443                                                {
444                                                    eprintln!("H1 TLS error: {}", e);
445                                                }
446                                            }
447                                        }
448                                    }
449                                    Err(e) => eprintln!("TLS handshake failed: {}", e),
450                                }
451                            });
452                        }
453                        Err(e) => eprintln!("TCP accept error: {}", e),
454                    }
455                }
456                _ = tokio::signal::ctrl_c() => {
457                    println!("\nShutting down gracefully.");
458                    break;
459                }
460            }
461        }
462    }
463
464    /// Binds a plain-HTTP listener on the port in `RWS_CONFIG_HTTP_REDIRECT_PORT` and sends
465    /// `301 Moved Permanently` to the HTTPS equivalent of every incoming URL.
466    /// Returns immediately if TLS is not configured or the redirect port is not set.
467    pub async fn run_redirect() {
468        use std::env;
469        use tokio::io::{AsyncReadExt, AsyncWriteExt};
470        use tokio::net::TcpListener as TokioListener;
471
472        let cert_path = env::var(crate::entry_point::Config::RWS_CONFIG_TLS_CERT_FILE)
473            .unwrap_or_default();
474        if cert_path.is_empty() {
475            return;
476        }
477
478        let redirect_port_str = env::var(crate::entry_point::Config::RWS_CONFIG_HTTP_REDIRECT_PORT)
479            .unwrap_or_default();
480        if redirect_port_str.is_empty() {
481            return;
482        }
483
484        let redirect_port: u16 = match redirect_port_str.parse() {
485            Ok(p) => p,
486            Err(_) => {
487                eprintln!("Invalid RWS_CONFIG_HTTP_REDIRECT_PORT: {}", redirect_port_str);
488                return;
489            }
490        };
491
492        let (server_ip, server_port, _) = get_ip_port_thread_count();
493        let bind_addr = format!("{}:{}", server_ip, redirect_port);
494
495        let listener = match TokioListener::bind(&bind_addr).await {
496            Ok(l) => l,
497            Err(e) => {
498                eprintln!("HTTP redirect listener error on {}: {}", bind_addr, e);
499                return;
500            }
501        };
502
503        println!("HTTP→HTTPS redirect listening on http://{}:{}", server_ip, redirect_port);
504
505        loop {
506            tokio::select! {
507                result = listener.accept() => {
508                    match result {
509                        Ok((mut stream, _peer)) => {
510                            let https_port = server_port;
511                            tokio::spawn(async move {
512                                let mut buf = vec![0u8; 4096];
513                                let n = match stream.read(&mut buf).await {
514                                    Ok(n) => n,
515                                    Err(_) => return,
516                                };
517                                let text = String::from_utf8_lossy(&buf[..n]);
518
519                                let uri = text.lines()
520                                    .next()
521                                    .and_then(|line| line.split_whitespace().nth(1))
522                                    .unwrap_or("/")
523                                    .to_string();
524
525                                let host_header = text.lines()
526                                    .find(|l| l.to_lowercase().starts_with("host:"))
527                                    .map(|l| l[5..].trim().to_string());
528
529                                let location = match host_header {
530                                    Some(h) => {
531                                        // strip existing port from Host header
532                                        let h_no_port = if h.starts_with('[') {
533                                            // IPv6: [::1] or [::1]:port
534                                            h.find(']')
535                                                .map(|i| h[..=i].to_string())
536                                                .unwrap_or(h.clone())
537                                        } else {
538                                            h.rfind(':')
539                                                .map(|i| h[..i].to_string())
540                                                .unwrap_or(h.clone())
541                                        };
542                                        if https_port == 443 {
543                                            format!("https://{}{}", h_no_port, uri)
544                                        } else {
545                                            format!("https://{}:{}{}", h_no_port, https_port, uri)
546                                        }
547                                    }
548                                    None => format!("https://localhost:{}{}", https_port, uri),
549                                };
550
551                                let response = format!(
552                                    "HTTP/1.1 301 Moved Permanently\r\nLocation: {}\r\nContent-Length: 0\r\nConnection: close\r\n\r\n",
553                                    location
554                                );
555                                let _ = stream.write_all(response.as_bytes()).await;
556                            });
557                        }
558                        Err(e) => eprintln!("HTTP redirect accept error: {}", e),
559                    }
560                }
561                _ = tokio::signal::ctrl_c() => {
562                    println!("\nShutting down HTTP redirect listener.");
563                    break;
564                }
565            }
566        }
567    }
568
569    async fn process_h1_tls(
570        mut stream: tokio_rustls::server::TlsStream<tokio::net::TcpStream>,
571        peer_addr: std::net::SocketAddr,
572        app: impl Application,
573    ) -> Result<(), String> {
574        use tokio::io::{AsyncReadExt, AsyncWriteExt};
575
576        let (server_ip, server_port, _) = get_ip_port_thread_count();
577        let request_allocation_size = get_request_allocation_size();
578
579        let mut buffer = vec![0u8; request_allocation_size as usize];
580        if let Err(e) = stream.read(&mut buffer).await {
581            let raw = Server::bad_request_response(e.to_string());
582            let _ = stream.write_all(&raw).await;
583            return Ok(());
584        }
585
586        let request = match Request::parse(&buffer) {
587            Ok(r) => r,
588            Err(message) => {
589                let raw = Server::bad_request_response(message);
590                let _ = stream.write_all(&raw).await;
591                return Ok(());
592            }
593        };
594
595        let connection = ConnectionInfo {
596            client: Address {
597                ip: peer_addr.ip().to_string(),
598                port: peer_addr.port() as i32,
599            },
600            server: Address {
601                ip: server_ip,
602                port: server_port,
603            },
604            request_size: request_allocation_size,
605        };
606
607        let mut response = match app.execute(&request, &connection) {
608            Ok(r) => r,
609            Err(message) => {
610                let raw = Server::bad_request_response(message);
611                let _ = stream.write_all(&raw).await;
612                return Ok(());
613            }
614        };
615
616        crate::compression::apply_gzip(&request, &mut response);
617        response.headers.push(Header::get_hsts_header());
618
619        #[cfg(feature = "http3")]
620        response.headers.push(Header {
621            name: Header::_ALT_SVC.to_string(),
622            value: format!("h3=\":{}\"", server_port),
623        });
624        #[cfg(not(feature = "http3"))]
625        response.headers.push(Header {
626            name: Header::_ALT_SVC.to_string(),
627            value: format!("h2=\":{}\"", server_port),
628        });
629
630        let log = Log::combined(&request, &response, &peer_addr);
631        println!("{}", log);
632
633        let raw = Response::generate_response(response, request);
634        stream
635            .write_all(&raw)
636            .await
637            .map_err(|e| e.to_string())?;
638        stream.flush().await.map_err(|e| e.to_string())?;
639
640        Ok(())
641    }
642}
643
644#[cfg(feature = "http3")]
645impl Server {
646    pub async fn run_quic(
647        app: impl Application + New + Send + 'static + Copy,
648    ) {
649        use crate::tls::create_quinn_server_config;
650        use crate::h3_handler;
651
652        let cert_path = std::env::var(crate::entry_point::Config::RWS_CONFIG_TLS_CERT_FILE)
653            .unwrap_or_default();
654        let key_path = std::env::var(crate::entry_point::Config::RWS_CONFIG_TLS_KEY_FILE)
655            .unwrap_or_default();
656
657        if cert_path.is_empty() || key_path.is_empty() {
658            return;
659        }
660
661        let server_config = match create_quinn_server_config(&cert_path, &key_path) {
662            Ok(c) => c,
663            Err(e) => {
664                eprintln!("QUIC TLS setup failed: {}", e);
665                return;
666            }
667        };
668
669        let (server_ip, server_port, _) = get_ip_port_thread_count();
670        let bind_addr = format!("{}:{}", server_ip, server_port);
671        let addr: std::net::SocketAddr = match bind_addr.parse() {
672            Ok(a) => a,
673            Err(e) => {
674                eprintln!("Invalid QUIC bind address '{}': {}", bind_addr, e);
675                return;
676            }
677        };
678
679        let endpoint = match quinn::Endpoint::server(server_config, addr) {
680            Ok(e) => e,
681            Err(e) => {
682                eprintln!("QUIC endpoint error: {}", e);
683                return;
684            }
685        };
686
687        println!("Listening for QUIC/HTTP3 on UDP {}:{}", server_ip, server_port);
688
689        loop {
690            tokio::select! {
691                maybe = endpoint.accept() => {
692                    match maybe {
693                        Some(incoming) => {
694                            tokio::spawn(async move {
695                                match incoming.await {
696                                    Ok(conn) => {
697                                        let peer_addr = conn.remote_address();
698                                        if let Err(e) = h3_handler::handle_connection(conn, peer_addr, app).await {
699                                            eprintln!("H3 connection error: {}", e);
700                                        }
701                                    }
702                                    Err(e) => eprintln!("QUIC connection error: {}", e),
703                                }
704                            });
705                        }
706                        None => break,
707                    }
708                }
709                _ = tokio::signal::ctrl_c() => {
710                    println!("\nShutting down QUIC.");
711                    endpoint.close(0u32.into(), b"shutdown");
712                    break;
713                }
714            }
715        }
716    }
717}
718
719
rust_web_server/server/mod.rs

rust_web_server/server/
mod.rs
