Event Socket Library

The FreeSWITCH Event Socket Library (ESL) is a set of standard APIs made available as loadable modules for various programming languages. Generally speaking, the APIs, when loaded into a programming language of your choice, provide native function calls for accessing FreeSWITCH event functionality—without the need to set up a TCP or network socket or otherwise concern yourself with how FreeSWITCH is reached.

Supported libraries

FreeSWITCH utilizes SWIG (www.swig.org) to create a standardized set of APIs. SWIG takes a defined list of variable and function calls and automatically creates libraries that link the core FreeSWITCH code to the programming language's native loadable module interfaces. The following languages are supported by default:

• Perl

• PHP

• LUA

• Python

• Ruby

• C

• TCL

• .NET

The following objects and methods apply to any language that can build ESL extensions. Once you have loaded the corresponding module for your particular programming language, you can utilize any of the...