ssl websocket debugging

draft_code/modwebsocket_test.py

@@ -3,7 +3,7 @@ import ssl
 import ubinascii
 from websocket import websocket
 
-# Connect to Wi-Fi
+# Connect to Wi-Fi (disabled as per your code)
 if False:
     wlan = network.WLAN(network.STA_IF)
     wlan.active(True)
@@ -11,7 +11,7 @@ if False:
     while not wlan.isconnected():
         pass
     print('Connected:', wlan.ifconfig())
-    
+
 # Resolve hostname
 host = 'echo.websocket.events'  # Replace with your WSS server
 port = 443
@@ -52,11 +52,71 @@ handshake = (
     'Sec-WebSocket-Version: 13\r\n'
     '\r\n'
 ).format(host, key.decode())
-ssl_sock.write(handshake.encode())
-response = ssl_sock.read(1024).decode()
-if '101 Switching Protocols' not in response:
+
+# Send handshake request
+try:
+    bytes_written = ssl_sock.write(handshake.encode())
+    print('Handshake sent, bytes written:', bytes_written)
+    print('Handshake request:', handshake)
+except Exception as e:
+    print('Failed to send handshake:', e)
     ssl_sock.close()
-    raise Exception('Handshake failed: ' + response)
+    raise
+
+# Read response in chunks with debugging
+response_bytes = bytearray()
+max_read = 1024  # Maximum bytes to read
+read_timeout = 10  # Timeout in seconds (adjust as needed)
+import time
+
+start_time = time.time()
+while len(response_bytes) < max_read:
+    try:
+        # Read a small chunk to avoid blocking too long
+        chunk = ssl_sock.read(128)
+        if not chunk:  # EOF or connection closed
+            print('No more data received (EOF)')
+            break
+        print('Received chunk, length:', len(chunk), 'bytes:', chunk)
+        response_bytes.extend(chunk)
+        print('Total bytes received:', len(response_bytes))
+    except Exception as e:
+        print('Error reading chunk:', e)
+        break
+    if time.time() - start_time > read_timeout:
+        print('Read timeout reached')
+        break
+
+# Inspect raw bytes
+print('Raw response bytes:', response_bytes)
+print('Raw response hex:', response_bytes.hex())
+
+# Attempt to decode response
+try:
+    response = response_bytes.decode('utf-8')
+    print('Decoded response:', response)
+except UnicodeError as e:
+    print('UnicodeError during decode:', e)
+    # Try decoding with 'ignore' to see partial response
+    response = response_bytes.decode('utf-8', errors='ignore')
+    print('Decoded with errors ignored:', response)
+    # Try alternative encoding (e.g., latin-1)
+    try:
+        response = response_bytes.decode('latin-1')
+        print('Decoded as latin-1:', response)
+    except Exception as e:
+        print('Latin-1 decode failed:', e)
+    # Dump printable characters
+    printable = ''.join(c if 32 <= ord(c) < 127 else '.' for c in response_bytes.decode('latin-1'))
+    print('Printable characters:', printable)
+    ssl_sock.close()
+    raise Exception('Failed to decode response')
+
+# Check for valid WebSocket handshake
+if '101 Switching Protocols' not in response:
+    print('Handshake response:', response)
+    ssl_sock.close()
+    raise Exception('Handshake failed')
 
 # Create WebSocket object
 ws = websocket(ssl_sock, True)