🐛 Fix graceful shutdown of relay and server in end_to_end test

Cargo.toml

@@ -29,5 +29,8 @@ rmp-serde = "0.14.4"
 serde = {version = "1.0.117", features = ["derive"]}
 structopt = "0.3.20"
 tokio = { version = "0.2.22", features = ["full"] }
+tracing = "0.1.21"
+tracing-futures = "0.2.4"
+tracing-subscriber = "0.2.15"
 toml = "0.5.7"
 ulid = "0.4.1"

src/bin/ptth_relay.rs

@@ -16,13 +16,13 @@ async fn main () -> Result <(), Box <dyn Error>> {
 	let config_file = {
 		let config_file_path = "config/ptth_relay.toml";
 		
-		let mut f = File::open (config_file_path).expect (&format! ("Can't open {:?}", config_file_path));
+		let mut f = File::open (config_file_path).unwrap_or_else (|_| panic! ("Can't open {:?}", config_file_path));
 		let mut buffer = vec! [0u8; 4096];
-		let bytes_read = f.read (&mut buffer).expect (&format! ("Can't read {:?}", config_file_path));
+		let bytes_read = f.read (&mut buffer).unwrap_or_else (|_| panic! ("Can't read {:?}", config_file_path));
 		buffer.truncate (bytes_read);
 		
-		let config_s = String::from_utf8 (buffer).expect (&format! ("Can't parse {:?} as UTF-8", config_file_path));
-		toml::from_str (&config_s).expect (&format! ("Can't parse {:?} as TOML", config_file_path))
+		let config_s = String::from_utf8 (buffer).unwrap_or_else (|_| panic! ("Can't parse {:?} as UTF-8", config_file_path));
+		toml::from_str (&config_s).unwrap_or_else (|_| panic! ("Can't parse {:?} as TOML", config_file_path))
 	};
 	
 	eprintln! ("ptth_relay Git version: {:?}", ptth::git_version::GIT_VERSION);

src/bin/ptth_server.rs

@@ -18,14 +18,14 @@ async fn main () -> Result <(), Box <dyn Error>> {
 	let config_file = {
 		let config_file_path = "config/ptth_server.toml";
 		
-		let mut f = std::fs::File::open (config_file_path).expect (&format! ("Can't open {:?}", config_file_path));
+		let mut f = std::fs::File::open (config_file_path).unwrap_or_else (|_| panic! ("Can't open {:?}", config_file_path));
 		let mut buffer = vec! [0u8; 4096];
-		let bytes_read = f.read (&mut buffer).expect (&format! ("Can't read {:?}", config_file_path));
+		let bytes_read = f.read (&mut buffer).unwrap_or_else (|_| panic! ("Can't read {:?}", config_file_path));
 		buffer.truncate (bytes_read);
 		
-		let config_s = String::from_utf8 (buffer).expect (&format! ("Can't parse {:?} as UTF-8", config_file_path));
-		toml::from_str (&config_s).expect (&format! ("Can't parse {:?} as TOML", config_file_path))
+		let config_s = String::from_utf8 (buffer).unwrap_or_else (|_| panic! ("Can't parse {:?} as UTF-8", config_file_path));
+		toml::from_str (&config_s).unwrap_or_else (|_| panic! ("Can't parse {:?} as TOML", config_file_path))
 	};
 	
-	ptth::server::main (config_file).await
+	ptth::server::main (config_file, None).await
 }

src/lib.rs

@@ -41,12 +41,21 @@ pub fn password_is_bad (mut password: String) -> bool {
 #[cfg (test)]
 mod tests {
 	use std::{
-		sync::Arc,
+		sync::{
+			Arc,
+			atomic::{
+				AtomicBool,
+				Ordering,
+			},
+		},
+		time::Duration,
 	};
 	
 	use tokio::{
 		runtime::Runtime,
 		spawn,
+		sync::oneshot,
+		time::delay_for,
 	};
 	
 	use super::{
@@ -58,7 +67,7 @@ mod tests {
 	fn check_bad_passwords () {
 		use crate::password_is_bad;
 		
-		for pw in vec! [
+		for pw in &[
 			"password",
 			"pAsSwOrD",
 			"secret",
@@ -80,6 +89,9 @@ mod tests {
 	fn end_to_end () {
 		use maplit::*;
 		use reqwest::Client;
+		use tracing::{info};
+		
+		tracing_subscriber::fmt::init ();
 		
 		let mut rt = Runtime::new ().unwrap ();
 		
@@ -99,8 +111,9 @@ mod tests {
 			let relay_state = Arc::new (relay::RelayState::from (&config_file));
 			
 			let relay_state_2 = relay_state.clone ();
-			spawn (async move {
-				relay::run_relay (relay_state_2, None).await.unwrap ();
+			let (stop_relay_tx, stop_relay_rx) = oneshot::channel ();
+			let task_relay = spawn (async move {
+				relay::run_relay (relay_state_2, Some (stop_relay_rx)).await.unwrap ();
 			});
 			
 			assert! (relay_state.list_servers ().await.is_empty ());
@@ -113,18 +126,22 @@ mod tests {
 				relay_url: "http://127.0.0.1:4000/7ZSFUKGV".into (),
 				file_server_root: None,
 			};
+			let stop_server_atomic = Arc::new (AtomicBool::from (false));
+			let task_server = {
+				let stop_server_atomic = stop_server_atomic.clone ();
 				spawn (async move {
-				server::main (config_file).await.unwrap ();
-			});
+					server::main (config_file, Some (stop_server_atomic)).await.unwrap ();
+				})
+			};
 			
-			tokio::time::delay_for (std::time::Duration::from_millis (500)).await;
+			delay_for (Duration::from_millis (500)).await;
 			
 			assert_eq! (relay_state.list_servers ().await, vec! [
 				server_name.to_string (),
 			]);
 			
 			let client = Client::builder ()
-			.timeout (std::time::Duration::from_secs (2))
+			.timeout (Duration::from_secs (2))
 			.build ().unwrap ();
 			
 			let resp = client.get (&format! ("{}/frontend/relay_up_check", relay_url))
@@ -156,6 +173,19 @@ mod tests {
 			.send ().await.unwrap ();
 			
 			assert_eq! (resp.status (), reqwest::StatusCode::NOT_FOUND);
+			
+			info! ("Shutting down end-to-end test");
+			
+			stop_server_atomic.store (true, Ordering::Relaxed);
+			stop_relay_tx.send (()).unwrap ();
+			
+			info! ("Sent stop messages");
+			
+			task_relay.await.unwrap ();
+			info! ("Relay stopped");
+			
+			task_server.await.unwrap ();
+			info! ("Server stopped");
 		});
 	}
 }

src/relay/mod.rs

@@ -10,7 +10,6 @@ use std::{
 };
 
 use dashmap::DashMap;
-use futures::channel::oneshot;
 use handlebars::Handlebars;
 use hyper::{
 	Body, 
@@ -26,7 +25,10 @@ use serde::{
 	Serialize,
 };
 use tokio::{
-	sync::Mutex,
+	sync::{
+		Mutex,
+		oneshot,
+	},
 };
 
 use crate::{
@@ -183,17 +185,23 @@ async fn handle_http_listen (
 		
 		if let Some (ParkedClients (v)) = request_rendezvous.remove (&watcher_code) 
 		{
+			// 1 or more clients were parked - Make the server
+			// handle them immediately
+			
 			return status_reply (StatusCode::OK, rmp_serde::to_vec (&v).unwrap ());
 		}
 		
 		request_rendezvous.insert (watcher_code, ParkedServer (tx));
 	}
 	
-	let one_req = vec! [
-		rx.await.unwrap (),
-	];
+	// No clients were parked - make the server long-poll
 	
-	return status_reply (StatusCode::OK, rmp_serde::to_vec (&one_req).unwrap ());
+	let one_req = match rx.await {
+		Ok (r) => r,
+		Err (_) => return status_reply (StatusCode::SERVICE_UNAVAILABLE, "Server is shutting down, try again soon"),
+	};
+	
+	status_reply (StatusCode::OK, rmp_serde::to_vec (&vec! [one_req]).unwrap ())
 }
 
 async fn handle_http_response (
@@ -385,11 +393,13 @@ pub fn load_templates ()
 	Ok (handlebars)
 }
 
+use tracing::info;
+
 pub async fn run_relay (
 	state: Arc <RelayState>,
-	shutdown_oneshot: Option <tokio::sync::oneshot::Receiver <()>>
+	shutdown_oneshot: Option <oneshot::Receiver <()>>
 ) 
-	-> Result <(), Box <dyn Error>> 
+-> Result <(), Box <dyn Error>> 
 {
 	let addr = SocketAddr::from ((
 		[0, 0, 0, 0],
@@ -406,7 +416,7 @@ pub async fn run_relay (
 		}
 	}
 	
-	eprintln! ("Loaded {} server tripcodes", state.config.server_tripcodes.len ());
+	info! ("Loaded {} server tripcodes", state.config.server_tripcodes.len ());
 	
 	let make_svc = make_service_fn (|_conn| {
 		let state = state.clone ();
@@ -424,16 +434,52 @@ pub async fn run_relay (
 	.serve (make_svc);
 	
 	match shutdown_oneshot {
-		Some (rx) => server.with_graceful_shutdown (async {
+		Some (rx) => {
+			info! ("Configured for graceful shutdown");
+			server.with_graceful_shutdown (async {
 				rx.await.ok ();
-		}).await?,
+				
+				state.response_rendezvous.clear ();
+				
+				let mut request_rendezvoux = state.request_rendezvous.lock ().await;
+				request_rendezvoux.clear ();
+				
+				info! ("Received graceful shutdown");
+			}).await?
+		},
 		None => server.await?,
 	};
 	
+	info! ("Exiting");
 	Ok (())
 }
 
 #[cfg (test)]
 mod tests {
+	use std::time::Duration;
 	
+	use tokio::{
+		runtime::Runtime,
+		spawn,
+		sync::oneshot,
+		time::delay_for,
+	};
+	
+	#[test]
+	fn so_crazy_it_might_work () {
+		let mut rt = Runtime::new ().unwrap ();
+		
+		rt.block_on (async {
+			let (tx, rx) = oneshot::channel ();
+			
+			let task_1 = spawn (async move {
+				delay_for (Duration::from_secs (1)).await;
+				tx.send (()).unwrap ();
+			});
+			
+			rx.await.unwrap ();
+			
+			task_1.await.unwrap ();
+		});
+	}
 }

src/server/mod.rs

@@ -117,7 +117,17 @@ pub struct Config {
 	pub file_server_root: Option <PathBuf>,
 }
 
-pub async fn main (config_file: ConfigFile) 
+use std::sync::atomic::{
+	AtomicBool,
+	Ordering,
+};
+
+use tracing::info;
+
+pub async fn main (
+	config_file: ConfigFile,
+	shutdown_atomic: Option <Arc <AtomicBool>>
+)
 -> Result <(), Box <dyn Error>> 
 {
 	use std::convert::TryInto;
@@ -135,6 +145,7 @@ pub async fn main (config_file: ConfigFile)
 	
 	let client = Client::builder ()
 	.default_headers (headers)
+	.timeout (Duration::from_secs (30))
 	.build ().unwrap ();
 	let handlebars = file_server::load_templates ()?;
 	
@@ -150,10 +161,24 @@ pub async fn main (config_file: ConfigFile)
 	let mut backoff_delay = 0;
 	
 	loop {
+		if let Some (a) = &shutdown_atomic {
+			if a.load (Ordering::Relaxed) {
+				break;
+			}
+		}
+		
 		if backoff_delay > 0 {
 			delay_for (Duration::from_millis (backoff_delay)).await;
 		}
 		
+		if let Some (a) = &shutdown_atomic {
+			if a.load (Ordering::Relaxed) {
+				break;
+			}
+		}
+		
+		info! ("http_listen");
+		
 		let req_req = state.client.get (&format! ("{}/http_listen/{}", state.config.relay_url, config_file.name));
 		
 		let err_backoff_delay = std::cmp::min (30_000, backoff_delay * 2 + 500);
@@ -186,4 +211,8 @@ pub async fn main (config_file: ConfigFile)
 			handle_req_resp (state, req_resp).await;
 		});
 	}
+	
+	info! ("Exiting");
+	
+	Ok (())
 }