diff --git a/examples/contrib/har_dump.py b/examples/contrib/har_dump.py
index e5f2714ce9..01a485d605 100644
--- a/examples/contrib/har_dump.py
+++ b/examples/contrib/har_dump.py
@@ -3,6 +3,7 @@
 import typing
 import tempfile
 
+
 from datetime import datetime
 from datetime import timezone
 import dateutil.parser
@@ -40,6 +41,7 @@ class HarCaptureTypes(Enum):
     RESPONSE_COOKIES = auto()
     RESPONSE_CONTENT = auto()
     RESPONSE_BINARY_CONTENT = auto()
+    WEBSOCKET_MESSAGES = auto()
 
     REQUEST_CAPTURE_TYPES = {
         REQUEST_HEADERS,
@@ -543,7 +545,7 @@ def save_har(self, har):
     def get_full_url(self, request):
         host_port = request.host
         if request.method == 'CONNECT':
-            if request.port is not 443:
+            if request.port != 443:
                 host_port = host_port + ':' + str(request.port)
             host_port = 'https://' + host_port
         else:
@@ -638,6 +640,32 @@ def capture_request_content(self, flow):
             "params": params
         }
 
+    def capture_websocket_message(self, flow):
+        har_entry = self.get_har_entry(flow.handshake_flow)
+        msg = flow.messages[-1]
+        har_entry.setdefault("_webSocketMessages", []).append({
+            "type": 'send' if msg.from_client else 'receive',
+            "opcode": msg.type.value,
+            "data": msg.content,
+            "time": msg.timestamp
+            })
+
+    # Capture errors as messages like Chrome har export does
+    def capture_websocket_error(self, flow):
+        har_entry = self.get_har_entry(flow.handshake_flow)
+        har_entry.setdefault("_webSocketMessages", []).append({
+            "type": 'error',
+            "time": flow.error.timestamp,
+            "opcode": -1,
+            "data": flow.error.msg
+        })
+
+    def websocket_message(self, flow):
+        self.capture_websocket_message(flow)
+
+    def websocket_error(self, flow):
+        self.capture_websocket_error(flow)
+
     def response(self, flow):
         har_entry = self.get_har_entry(flow)