Add Python WebSocket client that prints headers

README.md

@@ -11,6 +11,11 @@ In another terminal, run the WebSocket server (listens on 8078):
 bun server.js
 ```
 
+Alternative server with Python:
+```sh
+uv run server.py
+```
+
 Then, open your browser and navigate to `http://localhost:5173` and open the developer console to see how it doesn't work.
 
 In development console you can directly connect to the WebSocket server using:

server.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env uv run
+# /// script
+# requires-python = ">=3.13"
+# dependencies = [
+#     "websockets",
+# ]
+# ///
+import asyncio
+import websockets
+from websockets.http import Headers
+
+async def handler(ws):
+    while True:
+        msg = await ws.recv()
+        print(msg)
+        await ws.send(f"echo {msg}")
+
+async def headers_printer(path, req):
+    for hdr, value in req.headers.items():
+        hdr += ":"
+        print(f"{hdr:30}{value}")
+
+async def main():
+    async with websockets.serve(handler, '0.0.0.0', 8078, process_request=headers_printer):
+        await asyncio.Future()
+
+asyncio.run(main())