websock secure server - Case 6.2.4 : Pass - 2 ms @ 2026-01-07T13:35:37.641Z
Case Description
Send a valid UTF-8 text message in fragments of 1 octet, resulting in frames ending on positions which are not code point ends.
MESSAGE:
κόσμε
cebae1bdb9cf83cebcceb5
Case Expectation
The message is echo'ed back to us.
Case Outcome
Actual events match at least one expected.
Expected:
{'OK': [('message', u'\u03ba\u1f79\u03c3\u03bc\u03b5', False)]}
Observed:
[('message', u'\u03ba\u1f79\u03c3\u03bc\u03b5', False)]
Case Closing Behavior
The spec requires the connection to be failed cleanly here (UNCLEAN)
GET /wss HTTP/1.1 User-Agent: AutobahnTestSuite/25.10.1-0.10.9 Host: 127.0.0.1:8889 Upgrade: WebSocket Connection: Upgrade Pragma: no-cache Cache-Control: no-cache Sec-WebSocket-Key: R5cs4WZOrWEihqhuEIGAjA== Sec-WebSocket-Version: 13
HTTP/1.1 101 Switching Protocols Date: Wed, 07 Jan 2026 13:35:37 GMT Connection: Upgrade Upgrade: websocket Sec-Websocket-Accept: 528KhPst2t2hCuoYg9/auVIwb2A=
| 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 |
| 13 | 1 | 13 |
| 166 | 1 | 166 |
| Total | 2 | 179 |
| Chop Size | Count | Octets |
| 6 | 1 | 6 |
| 7 | 11 | 77 |
| 8 | 1 | 8 |
| 245 | 1 | 245 |
| Total | 14 | 336 |
| Opcode | Count |
| 1 | 1 |
| Total | 1 |
| Opcode | Count |
| 0 | 11 |
| 1 | 1 |
| 8 | 1 |
| Total | 13 |
000 TX OCTETS: 474554202f77737320485454502f312e310d0a557365722d4167656e743a204175746f6261686e5465737453756974652f32
352e31302e312d302e31302e390d ...
001 RX OCTETS: 485454502f312e312031303120537769746368696e672050726f746f636f6c730d0a446174653a205765642c203037204a61
6e20323032362031333a33353a33 ...
002 TX FRAME : OPCODE=1, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=69c04918, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xce
003 TX OCTETS: 018169c04918a7
004 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=8dd9214f, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xba
005 TX OCTETS: 00818dd9214f37
006 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=b82fe5cc, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xe1
007 TX OCTETS: 0081b82fe5cc59
008 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=2b278a61, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xbd
009 TX OCTETS: 00812b278a6196
010 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=e9c8a4b4, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xb9
011 TX OCTETS: 0081e9c8a4b450
012 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=47ea1bab, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xcf
013 TX OCTETS: 008147ea1bab88
014 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=7212f494, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0x83
015 TX OCTETS: 00817212f494f1
016 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=02ac613f, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xce
017 TX OCTETS: 008102ac613fcc
018 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=4b87ca20, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xbc
019 TX OCTETS: 00814b87ca20f7
020 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=9efe9efa, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xce
021 TX OCTETS: 00819efe9efa50
022 TX FRAME : OPCODE=0, FIN=False, RSV=0, PAYLOAD-LEN=1, MASK=7475cf90, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0xb5
023 TX OCTETS: 00817475cf90c1
024 TX FRAME : OPCODE=0, FIN=True, RSV=0, PAYLOAD-LEN=0, MASK=ba36b036, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
025 TX OCTETS: 8080ba36b036
026 CLOSE CONNECTION AFTER 1.000000 sec
027 RX OCTETS: 810bcebae1bdb9cf83cebcceb5
028 RX FRAME : OPCODE=1, FIN=True, RSV=0, PAYLOAD-LEN=11, MASKED=False, MASK=None
κόσμε
029 TX FRAME : OPCODE=8, FIN=True, RSV=0, PAYLOAD-LEN=2, MASK=d38c5c3d, PAYLOAD-REPEAT-LEN=None, CHOPSIZE=None, SYNC=False
0x03e8
030 TX OCTETS: 8882d38c5c3dd064
031 TCP DROPPED BY PEER