A tool for mirroring HTTP stream

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I'm looking for a tool (for debug purposes) which can "look" in a HTTP
I mean : client A is doing a HTTP connection on server B. Is there any
tool existing that could be on a Client B to monitor what is doing the
client A ?
If possible, a graphical tool which would show on the C screen what's
happening on the browser of A ?
I don't want to use VNC, because my point is to debug what's going on
between A and B, and why some "dialog" fails...
Thanks in advance.

Re: A tool for mirroring HTTP stream

On Tue, 23 Oct 2007, in the Usenet newsgroup comp.security.misc, in article

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Use any packet sniffer -  the HTTP commands are in plain text. See

1945 Hypertext Transfer Protocol -- HTTP/1.0. T. Berners-Lee, R.
     Fielding, H. Frystyk. May 1996. (Format: TXT=137582 bytes) (Status:

2616 Hypertext Transfer Protocol -- HTTP/1.1. R. Fielding, J. Gettys,
     J. Mogul, H. Frystyk, L. Masinter, P. Leach, T. Berners-Lee. June
     1999. (Format: TXT=422317, PS=5529857, PDF=550558 bytes) (Obsoletes
     RFC2068) (Updated by RFC2817) (Status: DRAFT STANDARD)

You can use any search engine to find copies of those RFCs.

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Read the commands and data.  It's in text, not pictures.

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Read the commands and see what is being requested, what is the response,
and what the web page is trying to display.  If you don't understand
this, you are going to have a very hard time debugging the connection.

        Old guy

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