#646 fixes

proxy/bridge.py

@@ -275,6 +275,9 @@ async def _ws_keepalive(ws, interval: float):
     """
     if interval <= 0:
         return
+    
+    interval = max(1.0, interval)  # reasonable minimum
+
     try:
         while True:
             await asyncio.sleep(interval)
@@ -354,7 +357,7 @@ async def bridge_ws_reencrypt(reader, writer, ws: RawWebSocket, label,
 
     tasks = [asyncio.create_task(tcp_to_ws()),
              asyncio.create_task(ws_to_tcp())]
-    keepalive = asyncio.ensure_future(
+    keepalive = asyncio.create_task(
         _ws_keepalive(ws, proxy_config.ws_keepalive_interval))
     try:
         await asyncio.wait(tasks, return_when=asyncio.FIRST_COMPLETED)