WebSocket DAT


The WebSocket DAT receives and parses WebSocket messages. WebSockets are fast an efficient two way communication protocol used by web servers and clients. Each message is parsed and appended as a row in the DAT's table. The table is FIFO "first-in first-out" and limited to parameter-set number of lines. An optional script may be run for each packet received. Secure (tls) websocket servers are also supported. Connections to different WebSocket sites are supported without requiring manual header setup.

The WebSocket DAT prints status and error messages to the TouchDesigner text console. The text console can be enabled by setting the environment variable TOUCH_TEXT_CONSOLE=1 (see: The text console will open the next time TouchDesigner is launched.

For SocketIO support see the SocketIO DAT.

See also: TCP/IP DAT

Example project: chat with WebSockets


Parameters - Connect Page

Active active - While on, the DAT receives information sent to the network port. While Off, no updating occurs. Data sent to the port is lost.

Network Address netaddress - The network address of the server computer. This address is a standard WWW address, such as foo or You can put an IP address (e.g. If you put localhost, it means the other end of the connection is on the same computer.

Network Port port - The port in which the DAT will accept messages. Port 443 implies a secure connection. If attempting a secure connection not using port 443 then a "wss://" prefix is required on the Network Address parameter.

Connection Timeout timeout - Time in milliseconds the WebSocket DAT will wait to connect to the server.

Parameters - Received Messages Page

Callbacks DAT callbacks - The Callbacks DAT will execute once for each message coming in.

Execute from executeloc - - Determines the location the script is run from.

  • Current Node current - The script is executed from the current node location.
  • Callbacks DAT callbacks - The script is executed from the location of the DAT specified in the Callbacks DAT parameter.
  • Specified Operator op - The script is executed from the operator specified in the From Operator parameter below.

From Operator fromop - The operator whose state change will trigger the DAT to execute its script when Execute from is set to Specified Operator. This operator is also the path that the script will be executed from if the Execute from parameter is set to Specified Operator.

Clamp Output clamp - The DAT is limited to 100 messages by default but with Clamp Output, this can be set to anything including unlimited.

Maximum Lines maxlines - Limits the number of messages, older messages are removed from the list first.

Clear Output clear - Deletes all lines except the heading. To clear with a python script op("opname").par.clear.pulse()

Bytes Column bytes - Outputs the raw bytes of the message in a separate column.

Parameters - Common Page

Language language - - Select how the DAT decides which script language to operate on.

  • Input input - The DAT uses the inputs script language.
  • Node node - The DAT uses it's own script language.

Edit/View Extension extension - - Select the file extension this DAT should expose to external editors.

  • dat dat - various common file extensions.
  • From Language language - pick extension from DATs script language.
  • Custom Extension custom - Specify a custom extension.

Custom Extension customext - Specifiy the custom extension.

Word Wrap wordwrap - - Enable Word Wrap for Node Display.

  • Input input - The DAT uses the inputs setting.
  • On on - Turn on Word Wrap.
  • Off off - Turn off Word Wrap.

Operator Inputs

  • Input 0: -

Info CHOP Channels

Extra Information for the WebSocket DAT can be accessed via an Info CHOP.

Common DAT Info Channels

  • num_rows - Number of rows in this DAT.
  • num_cols - Number of columns in this DAT.

Common Operator Info Channels

  • total_cooks - Number of times the operator has cooked since the process started.
  • cook_time - Duration of the last cook in milliseconds.
  • cook_frame - Frame number when this operator was last cooked relative to the component timeline.
  • cook_abs_frame - Frame number when this operator was last cooked relative to the absolute time.
  • cook_start_time - Time in milliseconds at which the operator started cooking in the frame it was cooked.
  • cook_end_time - Time in milliseconds at which the operator finished cooking in the frame it was cooked.
  • cooked_this_frame - 1 if operator was cooked this frame.
  • warnings - Number of warnings in this operator if any.
  • errors - Number of errors in this operator if any.

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