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Yes, that is how it works. The HTTP callback for outgoing messages is triggered immediately after the connector receives the message. For the SMPP Connector this is when the SMPP sm_submit packet is received. The script can then change the parameters of the message before sending it to the message queue or block the message so that the SMPP Connector sends an error message back to the SMPP client.

You can enable or disable HTTP callbacks for every gateway and connector individually.

Diafaan SMS Server sends only one HTTP callback request per messages. But you can of course do multiple things in the script, for instance do some accounting and block or change phishing messages. As long as the script can do this fast enough not to slow down message processing too much.

Regards, Henk

Hello Udo,

The basic- and full editions of Diafaan SMS Server have a feature called HTTP callbacks that can be used to block or change all of the messages in Diafaan SMS Server. When this option is enabled it sends an HTTP request to a script on a web server (or directly to a locally installed PHP program) that can process the information of the message, change it or block it completely.

Implementing a reliable system using the HTTP callbacks is not easy, the script must be very fast and reliable, otherwise the processing of messages in Diafaan SMS Server will slow down considerably, a script on a locally installed PHP instance will work best but calling an HTTP server can also be a good option if it runs on the local network. On the download page you can find a file with a number of example PHP scripts for the HTTP callback option.

Regards, Henk