POST /RPC2 HTTP/1.0
Host: localhost
Content-Type: text/xml
Content-length: 209

<?xml version="1.0"?>
<methodCall>
<methodName>sum</methodName>
<params>
<param>
  <value><double>1.12</double></value>
</param>
<param>
  <value><double>4.12</double></value>
</param>
</params>
</methodCall>
waiting for response
HTTP/1.1 200 OK
Date: Mon, 15 Dec 2008 16:17:46 GMT
Server: libwww-perl-daemon/5.818
Content-Length: 128
Content-Type: text/xml

<?xml version="1.0"?>
<methodResponse>
<params>
<param><value><double>5.24</double></value></param>
</params>
</methodResponse>