websock server - Case 7.1.6 : Informational - 13 ms @ 2025-11-26T12:31:55.196Z
Case Description
Send 256K message followed by close then a ping
Case Expectation
Case outcome depends on implementation defined close behavior. Message and close frame are sent back to back. If the close frame is processed before the text message write is complete (as can happen in asynchronous processing models) the close frame is processed first and the text message may not be received or may only be partially received.
Case Outcome
Actual events differ from any expected.
Expected:
{'OK': [('message', u'Hello World!', False)], 'NON-STRICT': []}
Observed:
[('message', u'BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd ...', False), ('message', u'Hello World!', False)]
Case Closing Behavior
The spec requires the connection to be failed cleanly here (INFORMATIONAL)
GET /ws HTTP/1.1 User-Agent: AutobahnTestSuite/25.10.1-0.10.9 Host: 127.0.0.1:8888 Upgrade: WebSocket Connection: Upgrade Pragma: no-cache Cache-Control: no-cache Sec-WebSocket-Key: zuG9soW6V/hRr78dXuFEaQ== Sec-WebSocket-Version: 13
HTTP/1.1 101 Switching Protocols Date: Wed, 26 Nov 2025 12:31:55 GMT Upgrade: websocket Connection: Upgrade Sec-Websocket-Accept: wA4rNCBmZ1T1txp4iYAo3EhRyOQ=
| Key | Value | Description |
| isServer | False | True, iff I (the fuzzer) am a server, and the peer is a client. |
| closedByMe | True | True, iff I have initiated closing handshake (that is, did send close first). |
| failedByMe | False | True, iff I have failed the WS connection (i.e. due to protocol error). Failing can be either by initiating closing handshake or brutal drop TCP. |
| droppedByMe | False | True, iff I dropped the TCP connection. |
| wasClean | False | True, iff full WebSocket closing handshake was performed (close frame sent and received) _and_ the server dropped the TCP (which is its responsibility). |
| wasNotCleanReason | peer dropped the TCP connection without previous WebSocket closing handshake | When wasClean == False, the reason what happened. |
| wasServerConnectionDropTimeout | False | When we are a client, and we expected the server to drop the TCP, but that didn't happen in time, this gets True. |
| wasOpenHandshakeTimeout | False | When performing the opening handshake, but the peer did not finish in time, this gets True. |
| wasCloseHandshakeTimeout | False | When we initiated a closing handshake, but the peer did not respond in time, this gets True. |
| localCloseCode | 1000 | The close code I sent in close frame (if any). |
| localCloseReason | None | The close reason I sent in close frame (if any). |
| remoteCloseCode | None | The close code the peer sent me in close frame (if any). |
| remoteCloseReason | None | The close reason the peer sent me in close frame (if any). |
| Chop Size | Count | Octets |
| 24 | 1 | 24 |
| 166 | 1 | 166 |
| 65536 | 4 | 262144 |
| Total | 6 | 262334 |
| Chop Size | Count | Octets |
| 6 | 1 | 6 |
| 8 | 1 | 8 |
| 18 | 1 | 18 |
| 244 | 1 | 244 |
| 262158 | 1 | 262158 |
| Total | 5 | 262434 |
| Opcode | Count |
| 1 | 2 |
| Total | 2 |
| Opcode | Count |
| 1 | 2 |
| 8 | 1 |
| 9 | 1 |
| Total | 4 |
000 TX OCTETS: 474554202f777320485454502f312e310d0a557365722d4167656e743a204175746f6261686e5465737453756974652f3235
2e31302e312d302e31302e390d0a ...
001 RX OCTETS: 485454502f312e312031303120537769746368696e672050726f746f636f6c730d0a446174653a205765642c203236204e6f
7620323032352031323a33313a35 ...
002 TX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=10, MASK=4a12ff15, PAYLOAD-REPEAT-LEN=262144, CHOPSIZE=None, SYNC=False
BAsd7&jh23
003 TX OCTETS: 81ff00000000000400004a12ff1508538c717d34957d7821bd543976c833207acd2608538c717d34957d7821bd543976c833
207acd2608538c717d34957d7821 ...
004 TX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=12, MASK=ec475856, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
Hello World!
005 TX OCTETS: 818cec475856a422343a83670f399e2b3c77
006 TX FRAME : OPCODE=8, FIN=True, RSV=0, PAYLOAD-LEN=2, MASK=9832a21d, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0x03e8
007 TX OCTETS: 88829832a21d9bda
008 TX FRAME : OPCODE=9, FIN=True, RSV=0, PAYLOAD-LEN=0, MASK=9dcb12d2, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
009 TX OCTETS: 89809dcb12d2
010 FAIL CONNECTION AFTER 1.000000 sec
011 RX OCTETS: 817f00000000000400004241736437266a6832334241736437266a6832334241736437266a6832334241736437266a683233
4241736437266a68323342417364 ...
012 RX OCTETS: 6a6832334241736437266a6832334241736437266a6832334241736437266a6832334241736437266a683233424173643726
6a6832334241736437266a683233 ...
013 RX OCTETS: 736437266a6832334241736437266a6832334241736437266a6832334241736437266a6832334241736437266a6832334241
736437266a683233424173643726 ...
014 RX OCTETS: 32334241736437266a6832334241736437266a6832334241736437266a6832334241736437266a6832334241736437266a68
32334241736437266a6832334241 ...
015 RX OCTETS: 37266a68323342417364810c48656c6c6f20576f726c6421
016 RX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=262144, MASKED=False, MASK=None
BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd7&jh23BAsd ...
017 RX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=12, MASKED=False, MASK=None
Hello World!
018 TCP DROPPED BY PEER