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Sets the data available handler for this socket.

Component Version macOS Windows Linux Server iOS SDK
Socket 3.1 ✅ Yes ✅ Yes ✅ Yes ❌ No ✅ Yes
MBS( "Socket.SetDataAvailableHandler"; SocketID; FileName; ScriptName )   More


Parameter Description Example
SocketID The socket ID received by Socket.Connect function. $sock
FileName The name of the FileMaker File that contains the script "MyDatabase.fp7"
ScriptName The name of the script to run "DataAvailable"


Returns OK or error message.


Sets the data available handler for this socket.
When new data arrives, this script is called, so you can call Socket.Read function.
Be aware that script may be called when just a few bytes are in the read buffer. So the data message you wait for may only be available partly. In that case, please read available bytes, check if whole packet/message arrived and if not, store read data for later and wait for next script call.

The script parameter is the ID of the socket. You can associate additional values with Socket.SetTag function to the socket and use them in the script triggered.

With plugin version 6.0 or newer the script name can be a script ID number. In that case the plugin queries the script name for the given script ID. This allows to call scripts by ID and avoid problems if scripts are later renamed.

Notice: FileMaker 19.2 adds a fmplugin extended privileges. If you have such an extended privileges to allow the plugin to trigger scripts, you need to grant permissions for it. If such a privilege is not defined, the plugin is allowed to trigger scripts. See FileMaker product documentation for details.


Set script to be triggered if data is available:

Set Variable [$r; Value:MBS("Socket.SetDataAvailableHandler"; $$sock; Get(FileName); "ReadMessage")]

See also

Example Databases

This function checks for a license.

Created 18th August 2014, last changed 27th March 2019

Socket.SetDataAvailableEvaluate - Socket.SetDataAvailableURL