enable ssl

server/json_websockets.py

@@ -59,10 +59,11 @@ class JsonWebsocketConnection(object):
 
 
 class JsonWebsocketServer(object):
-    def __init__(self, handler_class: JsonWebsocketConnection, host:str = 'localhost', port:int = 8765):
+    def __init__(self, handler_class: JsonWebsocketConnection, host:str = 'localhost', port:int = 8765, ssl_context = None):
         self._host = host
         self._port = port
         self._handler_class = handler_class
+        self._ssl_context = ssl_context
 
     def run(self):
         async def main(websocket: websockets.WebSocketServerProtocol,
@@ -72,6 +73,9 @@ class JsonWebsocketServer(object):
 
             await connection.run()
 
+        if (self._ssl_context is not None):
+            start_server = websockets.serve(main, self._host, self._port, ssl=self._ssl_context)
+        else:
             start_server = websockets.serve(main, self._host, self._port)
 
         asyncio.get_event_loop().run_until_complete(start_server)

server/main.py

@@ -1,7 +1,22 @@
+import ssl
+import logging
 from . import json_websockets
 from . import crossword_connection
 
+try:
+    cert_file = "fullchain.pem"
+    key_file = "privkey.pem"
+
+    ssl_context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER)
+    ssl_context.load_cert_chain(cert_file, keyfile=key_file)
+except Exception as e:
+    logging.error("no ssl context available")
+    ssl_context = None
+
+
 server = json_websockets.JsonWebsocketServer(
-    crossword_connection.CrosswordConnection
+    crossword_connection.CrosswordConnection, ssl_context=ssl_context
 )
+
+
 server.run()