xml using sax

[郭志伟]

hi all
I meet a problem . when i parse data from socket using sax, i want to get a segment of it. eg:

............
<heartbeat id='1111122222'/>[/COLOR]
<message>
<login username ='1111' pwd='2222'/>
</message>
<heartbeat id='1111122222'/>
..............
.............

how can i get the message segment