update websocket examples

draft_code/modwebsocket_test.py

@@ -9,8 +9,8 @@ host = 'ws.postman-echo.com'
 port = 443
 handshake_path = '/raw'
 # Option: echo.websocket.events (unreliable)
-# host = 'echo.websocket.events'
-# handshake_path = '/'
+#host = 'echo.websocket.events'
+#handshake_path = '/'
 
 try:
     addr_info = socket.getaddrinfo(host, port)[0][-1]

internal_filesystem/apps/com.example.btcticker/assets/echo.py

@@ -15,7 +15,8 @@ import asyncio
 try:
     URL = sys.argv[1]  # expects a websocket echo server
 except Exception:
-    URL = "ws://echo.websocket.events"
+    # URL = "ws://echo.websocket.events" # also works
+    URL = "wss://echo.websocket.events"
 
 
 sslctx = False
@@ -24,6 +25,7 @@ if URL.startswith("wss:"):
     try:
         sslctx = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
         sslctx.verify_mode = ssl.CERT_NONE
+        #sslctx.verify_mode = ssl.CERT_REQUIRED # doesn't work because OSError: (-30336, 'MBEDTLS_ERR_SSL_CA_CHAIN_REQUIRED') 
     except Exception:
         pass