websockets work now

draft_code/modwebsocket_test.py

@@ -3,6 +3,13 @@ import ssl
 import ubinascii
 from websocket import websocket
 import time
+import select
+import gc
+
+# Log memory usage
+def log_memory():
+    gc.collect()
+    print('Free memory:', gc.mem_free())
 
 # Connect to Wi-Fi (disabled as per your code)
 if False:
@@ -14,14 +21,13 @@ if False:
     print('Connected:', wlan.ifconfig())
 
 # Resolve hostname
-# Option 1: echo.websocket.events (unreliable)
-host = 'echo.websocket.events'
+# Option 1: ws.postman-echo.com (recommended for reliable echo)
+host = 'ws.postman-echo.com'
 port = 443
-handshake_path = '/'
-# Option 2: ws.postman-echo.com (recommended for testing)
-# host = 'ws.postman-echo.com'
-# port = 443
-# handshake_path = '/raw'
+handshake_path = '/raw'
+# Option 2: echo.websocket.events (unreliable)
+# host = 'echo.websocket.events'
+# handshake_path = '/'
 
 try:
     addr_info = socket.getaddrinfo(host, port)[0][-1]
@@ -44,10 +50,12 @@ except Exception as e:
 try:
     ssl_sock = ssl.wrap_socket(sock, server_hostname=host)
     print('SSL connection established')
+    print('SSL cipher:', ssl_sock.cipher())
 except Exception as e:
     print('SSL wrap failed:', e)
     sock.close()
     raise
+log_memory()
 
 # Set socket to non-blocking
 ssl_sock.setblocking(False)
@@ -74,15 +82,29 @@ except Exception as e:
     print('Failed to send handshake:', e)
     ssl_sock.close()
     raise
+log_memory()
 
-# Read HTTP response until \r\n\r\n (minimize reading)
+# Read HTTP response until \r\n\r\n
 response_bytes = bytearray()
 max_read = 1024
-read_timeout = 2
+read_timeout = 5  # Increased to 5s for server response
 start_time = time.time()
+poller = select.poll()
+poller.register(ssl_sock, select.POLLIN)
 while len(response_bytes) < max_read:
+    events = poller.poll(100)  # Wait 100ms
+    print('Poll events:', events)
+    if not events:
+        if time.time() - start_time > read_timeout:
+            print('Read timeout reached')
+            break
+        continue
     try:
         chunk = ssl_sock.read(128)
+        print('Read attempt, chunk:', chunk)
+        if chunk is None:
+            print('Read returned None, continuing to poll')
+            continue
         if not chunk:
             print('No more data received (EOF)')
             break
@@ -91,7 +113,6 @@ while len(response_bytes) < max_read:
         print('Total bytes received:', len(response_bytes))
         if b'\r\n\r\n' in response_bytes:
             print('End of HTTP headers detected')
-            # Decode and verify HTTP response immediately
             http_end = response_bytes.find(b'\r\n\r\n') + 4
             if http_end < 4:
                 ssl_sock.close()
@@ -110,15 +131,12 @@ while len(response_bytes) < max_read:
                 print('Handshake response:', response)
                 ssl_sock.close()
                 raise Exception('Handshake failed')
-            # Stop reading to leave WebSocket frame in socket buffer
             print('Stopping read to preserve WebSocket frame')
             break
     except Exception as e:
         print('Error reading chunk:', e)
         break
-    if time.time() - start_time > read_timeout:
-        print('Read timeout reached')
-        break
+log_memory()
 
 # Create WebSocket object
 try:
@@ -128,8 +146,9 @@ except Exception as e:
     print('Failed to create WebSocket object:', e)
     ssl_sock.close()
     raise
+log_memory()
 
-# Send and receive data with retries
+# Send and receive data with polling
 try:
     bytes_written = ws.write('Hello, Secure WebSocket!')
     print('Sent message, bytes written:', bytes_written)
@@ -138,23 +157,29 @@ except Exception as e:
     ws.close()
     raise
 
-# Try reading multiple times to catch initial message or echo
-max_attempts = 5
-read_timeout = 1  # Short timeout per read
+# Poll for data with retries
+max_attempts = 10  # Increased retries
+poll_timeout = 100  # 100ms per poll
+start_time = time.time()
 for attempt in range(max_attempts):
+    events = poller.poll(poll_timeout)
+    print('Read poll attempt', attempt + 1, 'events:', events)
+    if not events:
+        print('Read attempt', attempt + 1, 'no data available')
+        if time.time() - start_time > 2:  # 2s total timeout
+            print('Read timeout reached')
+            break
+        continue
     try:
         data = ws.read(1024)
         print('Read attempt', attempt + 1, 'received:', data)
         if data:
             break
-        time.sleep(0.5)  # Wait briefly before retrying
     except Exception as e:
         print('Read attempt', attempt + 1, 'error:', e)
-        time.sleep(0.5)
-    if time.time() - start_time > read_timeout:
-        print('Read timeout reached')
-        break
+    time.sleep(0.1)
 
 # Close connection
 ws.close()
 print('Connection closed')
+log_memory()