On Tue, Nov 25, 2003 at 03:42:42PM -0500, Neil Schemenauer wrote:
> On Tue, Nov 25, 2003 at 12:33:36PM -0800, Dave Kuhlman wrote:
> >   File "/usr/local/lib/python2.3/site-packages/scgi/scgi_server.py", line
29, in ns_read_size
> >     return long(size)
> > ValueError: invalid literal for long(): GET /qotd HTTP/1.1
> > User-Agent
>
> Something very strange is going on.  I would suggest some low-level
> debugging.  As root:
>
>     tcpdump -i lo -s 1500 -w  port 3001
>
> Try loading a page again.  Interrupt the tcpdump process and run (as
> a normal user):
>
>     ethereal -r 
>
> Select the TCP packet with SYN flag set and use the "follow TCP
> stream" command to find out what is being sent to the SCGI server.
> It seems like mod_scgi is violating the protocol.  That's weird and
> something else must be going on.

My, that was fun.  Some of this stuff was not on my Linux system.
So, here's what I did:

    built libpcap-0.7.2,
    built tcpdump-3.7.2, and
    built ethereal-0.9.16.

Then, ran tcpdump.  Then ran ethereal.

I selected one of the lines that says SYN, and when I do "Follow
TCP stream", here is what I see:

    GET /qotd HTTP/1.1.
    Host: localhost:3001.
    User-Agent: Mozilla/5.0 (X11; U; Linux i686;
    Debian/1.3.3.20030330-0.libranet.2) Gecko/20030316 Galeon/1.3.3.
    Accept:
    text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=
0.8,video/x-mng,image/png,image/jpeg,image/gif;q=0.2,*/*;q=0.1.
    Accept-Encoding: gzip, deflate, compress;q=0.9.
    Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7.
    Keep-Alive: 300.
    Connection: keep-alive.
    .

And, when I use Opera as my Web browser to make the request, I get:

    GET /qotd HTTP/1.1.
    User-Agent: Opera/7.23 (X11; Linux i686; U)  [en].
    Host: localhost:3001.
    Accept: text/html, application/xml;q=0.9,
    application/xhtml+xml;q=0.9, image/png, image/jpeg, image/gif,
    image/x-xbitmap, */*;q=0.1.
    Accept-Charset: iso-8859-1, utf-8, utf-16, *;q=0.1.
    Accept-Encoding: deflate, gzip, x-gzip, identity, *;q=0.
    Connection: Keep-Alive, TE.
    TE: deflate, gzip, chunked, identity, trailers.
    .

Is that what I should be looking at?

I'm  guessing that looks OK.  Yes?  Or, is there supposed to be
something in front of the "GET /qotd HTTP/1.1."?

I'll try to look into it more in the morning when I'm brighter.  But,
configuring mod_scgi seems pretty simple.  Maybe with the light of
day, I'll see something ...

Dave


--
Dave Kuhlman
dkuhlman@rexx.com
http://www.rexx.com/~dkuhlman