Added async WebSocket example

Author: w-henderson

.github/workflows/examples.yml

@@ -25,6 +25,12 @@ jobs:
           toolchain: stable
           override: true
 
+      - name: Check async WebSocket example
+        uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --manifest-path examples/async-websocket/Cargo.toml
+
       - name: Check auth example
         uses: actions-rs/cargo@v1
         with:

examples/async-websocket/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "async_websocket"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+humphrey_ws = { path = "../../humphrey-ws" }
+
+[workspace]

examples/async-websocket/src/main.rs

@@ -0,0 +1,42 @@
+use humphrey_ws::async_app::{AsyncSender, AsyncStream, AsyncWebsocketApp};
+use humphrey_ws::message::Message;
+
+use std::io::BufRead;
+use std::sync::Arc;
+use std::thread::spawn;
+
+fn main() {
+    // Create a new async WebSocket app with no state, and register some handlers.
+    let websocket_app: AsyncWebsocketApp<()> = AsyncWebsocketApp::new()
+        .with_connect_handler(connect_handler)
+        .with_message_handler(message_handler);
+
+    // Get a sender from the app so we can send messages without waiting for events.
+    // Start a thread to listen for user input.
+    let sender = websocket_app.sender();
+    spawn(move || user_input(sender));
+
+    // Run the app.
+    websocket_app.run();
+}
+
+/// Listen for user input and broadcast it line by line to all connected clients.
+fn user_input(sender: AsyncSender) {
+    let stdin = std::io::stdin();
+    let handle = stdin.lock();
+
+    for line in handle.lines().flatten() {
+        sender.broadcast(Message::new(line));
+    }
+}
+
+/// Handle connections by broadcasting their arrival.
+fn connect_handler(stream: AsyncStream, _: Arc<()>) {
+    let message = Message::new(format!("Welcome, {}!", stream.peer_addr()));
+    stream.broadcast(message);
+}
+
+/// Echo messages back to the client that sent them.
+fn message_handler(stream: AsyncStream, message: Message, _: Arc<()>) {
+    stream.send(message);
+}