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SocketWriteMessage—Wolfram Documentation

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SocketWriteMessage[socket,ba]

writes byte array ba to the specified socket.

SocketWriteMessage[socket,string]

writes string to the specified socket.

SocketWriteMessage[socket,assoc]

writes messages specified by assoc to the specified socket.

Details and Options
Details and Options Details and Options
Examples  
Basic Examples  
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SocketWriteMessage

SocketWriteMessage[socket,ba]

writes byte array ba to the specified socket.

SocketWriteMessage[socket,string]

writes string to the specified socket.

SocketWriteMessage[socket,assoc]

writes messages specified by assoc to the specified socket.

Details and Options

  • SocketWriteMessage is supported for web sockets only. This means that the SocketObject should have a protocol of "WS" or "WSS".
  • SocketWriteMessage sends messages to an active web socket server.
  • Message data in the web socket protocol can be be either binary or text, but not both at the same time.
  • Message data is sent as text by default, but can be sent as binary by using an assoc.
  • Supported keys for assoc include:
  • "DataByteArray"data specified as a byte array
    "Type"type of the data,either "Text" or "Binary"
    "MultipartComplete"whether the message is complete
  • If the value for "MultipartComplete" is False, the message must be completed in a future call to SocketWriteMessage.

Examples

Basic Examples  (1)

Connect to a reference web socket server that echoes the messages it receives:

Wolfram Language code: socket = SocketConnect["wss://echo.websocket.org"]

Read the initial response from the server:

Wolfram Language code: SocketReadMessage[socket]

Send a short message:

Wolfram Language code: SocketWriteMessage[socket, StringToByteArray["hello"]]

Read the response message:

Wolfram Language code: out = SocketReadMessage[socket]

Convert the byte array to a human-readable string:

Wolfram Language code: ByteArrayToString[out["DataByteArray"]]
Wolfram Research (2026), SocketWriteMessage, Wolfram Language function, https://reference.wolfram.com/language/ref/SocketWriteMessage.html.

Text

Wolfram Research (2026), SocketWriteMessage, Wolfram Language function, https://reference.wolfram.com/language/ref/SocketWriteMessage.html.

CMS

Wolfram Language. 2026. "SocketWriteMessage." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/SocketWriteMessage.html.

APA

Wolfram Language. (2026). SocketWriteMessage. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/SocketWriteMessage.html

BibTeX

@misc{reference.wolfram_2026_socketwritemessage, author="Wolfram Research", title="{SocketWriteMessage}", year="2026", howpublished="\url{https://reference.wolfram.com/language/ref/SocketWriteMessage.html}", note=[Accessed: 14-November-2026]}

BibLaTeX

@online{reference.wolfram_2026_socketwritemessage, organization={Wolfram Research}, title={SocketWriteMessage}, year={2026}, url={https://reference.wolfram.com/language/ref/SocketWriteMessage.html}, note=[Accessed: 14-November-2026]}