Soup is a SOAP (Simple Object Access Protocol) implementation in C. 

It provides an queued asynchronous callback-based mechanism for sending and
servicing SOAP requests, and a WSDL (Web Service Definition Language) to C
compiler which generates client stubs and server skeletons for easily calling
and implementing SOAP methods.

It uses the Glib main loop and is designed to work well with GTK
applications.  This enables GNOME applications to access SOAP servers
on the network in a completely asynchronous fashion, very similar to the
Gtk+ programming model (a synchronous operation mode is also supported
for those who want it).

The WSDL compiler will help you make your applications interoperate
with services that expose their descriptions through WSDL.

Features:
  * Completely Asynchronous
  * Connection cache
  * HTTP chunked transfer support
  * HTTP, SOCKS4, and SOCKS5 authenticated proxy support
  * SSL Support using OpenSSL or Mozilla NSS
  * Apache module server support
  * Client support for Digest, NTLM, and Basic authentication
  * Standalone SOAP server support

Planned Features:
  * Server digest authentication
  * Gconf configuration and proxy integration
  * UDDI Support
  * Disco support
  * GTK or Bonobo object generation

To subscribe to the Soup discussion list, send mail with the word "Subscribe" in
the message body to soup-list-request@ximian.com.

Licensing:
  * The Soup runtime is licensed LGPL, see COPYING.LIB for more details.
  * The WSDL compiler is licensed GPL, see COPYING for more details.
  * The soup-ssl-proxy application is licensed GPL, see COPYING for more
    details. This is in order to comply with the licensing restrictions
    imposed by the SSL libraries used by Soup, while allowing the Soup
    application libraries and runtime to remain LGPL.