Differential D7693 Diff 27016 services/tunnelbroker/src/websockets/mod.rs

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services/tunnelbroker/src/websockets/mod.rs

use futures::future;		use futures::future;
		use futures_util::stream::SplitSink;
		use futures_util::SinkExt;
use futures_util::{StreamExt, TryStreamExt};		use futures_util::{StreamExt, TryStreamExt};
use std::net::SocketAddr;		use std::net::SocketAddr;
use std::{env, io::Error};		use std::{env, io::Error};
use tokio::net::{TcpListener, TcpStream};		use tokio::net::{TcpListener, TcpStream};
use tokio::sync::mpsc;		use tokio::sync::mpsc;
use tokio_tungstenite::tungstenite::Message;		use tokio_tungstenite::tungstenite::Message;
		use tokio_tungstenite::WebSocketStream;
use tracing::{debug, error, info};		use tracing::{debug, error, info};
use tunnelbroker_messages::messages::Messages;		use tunnelbroker_messages::messages::Messages;

use crate::ACTIVE_CONNECTIONS;		use crate::ACTIVE_CONNECTIONS;

pub async fn run_server() -> Result<(), Error> {		pub async fn run_server() -> Result<(), Error> {
let addr = env::var("COMM_TUNNELBROKER_WEBSOCKET_ADDR")		let addr = env::var("COMM_TUNNELBROKER_WEBSOCKET_ADDR")
.unwrap_or_else(\|_\| "127.0.0.1:51001".to_string());		.unwrap_or_else(\|_\| "127.0.0.1:51001".to_string());
Show All 18 Lines	Err(e) => {
info!(		info!(
"Failed to establish connection with {}. Reason: {}",		"Failed to establish connection with {}. Reason: {}",
addr, e		addr, e
);		);
return;		return;
}		}
};		};

let (_outgoing, incoming) = ws_stream.split();		let (mut outgoing, incoming) = ws_stream.split();
		// Create channel for messages to be passed to this connection
		let (tx, mut rx) = mpsc::unbounded_channel::<String>();

let handle_incoming = incoming.try_for_each(\|msg\| {		let handle_incoming = incoming.try_for_each(\|msg\| {
debug!("Received message from {}", addr);		debug!("Received message from {}", addr);
match msg {		match msg {
Message::Text(text) => {		Message::Text(text) => {
match handle_message(&text) {		match handle_message_from_device(&text, &tx) {
Ok(_) => {		Ok(_) => {
debug!("Successfully handled message: {}", text)		debug!("Successfully handled message: {}", text)
}		}
Err(e) => {		Err(e) => {
error!("Failed to process message: {}", e);		error!("Failed to process message: {}", e);
}		}
};		};
}		}
_ => {		_ => {
error!("Invalid message was received");		error!("Invalid message was received");
}		}
}		}

future::ok(())		future::ok(())
});		});

// Create channel for messages to be passed to this connection
let (tx, mut rx) = mpsc::unbounded_channel::<Messages>();
// TODO: Use device's public key, once we support the SessionRequest message
ACTIVE_CONNECTIONS.insert("test".to_string(), tx.clone());

debug!("Polling for messages from: {}", addr);		debug!("Polling for messages from: {}", addr);
		// Poll for messages either being sent to the device (rx)
		// or messages being received from the device (handle_incoming)
tokio::select! {		tokio::select! {
Some(_) = rx.recv() => { debug!("Received message from channel") },		Some(message) = rx.recv() => { handle_message_from_service(message, &mut outgoing).await; },
Ok(_) = handle_incoming => { debug!("Received message from websocket") },		Ok(_) = handle_incoming => { debug!("Received message from websocket") },
else => {		else => {
info!("Connection with {} closed.", addr);		info!("Connection with {} closed.", addr);
ACTIVE_CONNECTIONS.remove("test");		ACTIVE_CONNECTIONS.remove("test");
}		}
}		}
}		}

fn handle_message(message: &str) -> Result<(), serde_json::Error> {		fn handle_message_from_device(
serde_json::from_str::<Messages>(message)?;		message: &str,
		tx: &tokio::sync::mpsc::UnboundedSender<std::string::String>,
		) -> Result<(), serde_json::Error> {
		match serde_json::from_str::<Messages>(message)? {
		Messages::SessionRequest(session_info) => {
		ACTIVE_CONNECTIONS.insert(session_info.device_id, tx.clone());
		}
		_ => {
		debug!("Received invalid request");
		}
		}

Ok(())		Ok(())
}		}

		async fn handle_message_from_service(
		incoming_payload: String,
		outgoing: &mut SplitSink<WebSocketStream<tokio::net::TcpStream>, Message>,
		) {
		if let Err(e) = outgoing.send(Message::Text(incoming_payload)).await {
		error!("Failed to send message to device: {}", e);
		}
		}