# perldoc > SOAP::Transport::LOOPBACK

## NAME
    [SOAP::Transport::LOOPBACK](https://www.chedong.com/phpMan.php/perldoc/SOAP%3A%3ATransport%3A%3ALOOPBACK/markdown) - Test loopback transport backend (Client only)

## DESCRIPTION
    [SOAP::Transport::LOOPBACK](https://www.chedong.com/phpMan.php/perldoc/SOAP%3A%3ATransport%3A%3ALOOPBACK/markdown) is a test transport backend for [SOAP::Lite](https://www.chedong.com/phpMan.php/perldoc/SOAP%3A%3ALite/markdown).

    It just returns the XML request as response, thus allowing to test the complete application
    stack of client applications from the front end down to the transport layer without actually
    sending data over the wire.

    Using this transport backend is triggered by setting a loopback:// URL.

    Sending requests through this transport backend alway succeeds with the following states:

     status: 200 OK
     code: 200
     message: OK

## COPYRIGHT
    Copyright (C) 2007 Martin Kutter. All rights reserved.

    This file is part of SOAP-Lite, Copyright (C) 2000-2001 Paul Kulchenko.

    This library is free software; you can redistribute it and/or modify it under the same terms as
    Perl itself.

## AUTHOR
    Martin Kutter <martin.kutter fen-net.de>