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From Craig Sebenik <cr...@netapp.com>
Subject Re: problem with filters and dynamic content
Date Sun, 30 Jun 2002 00:06:30 GMT
More details:

using apache 2.0.39 on solaris 2.7

built with the following options:


_CONFIG_OPTS=" --prefix=$_INST_DIR
               --with-layout=Apache
               --enable-proxy
               --enable-proxy-http
               --enable-expires
               --enable-headers
               --enable-usertrack
               --enable-unique-id
               --enable-info
               --enable-cgi
               --enable-cgid
               --enable-vhost-alias
               --enable-speling
               --enable-rewrite
               --enable-ext-filter
             "


Quoting Craig Sebenik (craig@netapp.com):
> Quoting Ryan Bloom (rbb@covalent.net):
> > There isn't enough information here to actually answer your question.
> 
> My apologies.. some times things seem SOO obvious to you you forget that 
> not everyone has been staring at the same code for the past week. :)
> 
> 
> > There is no reason that the filter wouldn't work from the face of it, so
> > at this point it depends on configuration and on the way the filter is
> > written.  The first thing to try is to make sure that the filter is
> > actually added to the proxy for the CGI request
> 
> The filter is not applied to the CGI output, but is applied to static. I
> forgot to mention that it is an "external filter", which I do realize is
> "experimental". It is working for 90% of the site, it just isn't working
> for the proxied content. (I do have other, less desirable, options
> available and I do have a couple of days... so no pressure and no "big"
> hurry. :> )
> 
> 
> > What does the filter actually do?
> 
> The filter parses XML data and applies a "look and feel". Kind of
> templating solution. (I do realize that there are a TON of other options
> availble.) I have removed almost all of the code to boil things down to
> the basics.
> 
> 
> > Can you send me the code so that I
> > can vet the filter quickly?
> 
> The filter code (test-out.pl)
> 
> #!/tool/http/bin/perl -I/tool/http/lib/perl
> print "<!-- the test filter is applied .... -->\n";
> undef $/;
> print <STDIN>;
> # End of file.
> 
> The apache config opts:
> 
> ExtFilterDefine test-out mode=output intype=text/html outtype=text/html \
> cmd="/path/to/filter/test-out.pl"   
> 
> <location /EXIT/>
>     ProxyPass        http://exit.hq.netapp.com/
>     ProxyPassReverse http://exit.hq.netapp.com/
>     SetOutputFilter test-out
>     ExtFilterOptions DebugLevel=1
> </location>
> 
> 
> The first couple lines of output follow. Obvisouly, "dy.cgi" is a CGI, 
> while "st.html" is a normal static html file. (The headers remain more or 
> less the same as what I had in the original message.)
> 
> 
> exit:~> GET craig-devel/EXIT/t/dy.cgi | head -3
> <!DOCTYPE html
>         PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
>         "DTD/xhtml1-transitional.dtd">
> 
> 
> exit:~> GET craig-devel/EXIT/t/st.html | head -3
> <!-- the test filter is applied .... -->
> <na:param pdf-link='file.pdf' size='987M'/>
> <na:header
> 
> 
> My apologies (in advance) is there something obviously wrong or you still 
> do not have enough data...
> 
> Just let me know what else you need.
> 
> (Thanx for the quick response. :> )
> 
> 
> Craig.
> 
> 
> 
> 
> 
> 
> > 
> > Ryan
> > 
> > ----------------------------------------------
> > Ryan Bloom                  rbb@covalent.net
> > 645 Howard St.              rbb@apache.org
> > San Francisco, CA 
> > 
> > > -----Original Message-----
> > > From: Craig Sebenik [mailto:craig@netapp.com]
> > > Sent: Friday, June 28, 2002 5:00 PM
> > > To: users@httpd.apache.org
> > > Subject: problem with filters and dynamic content
> > > 
> > > I am having a problem using an output filter with "dynamic" data
> > returned
> > > from a proxy.
> > > 
> > > The relevant pieces of the config;
> > > 
> > > <location /SERVER/>
> > >     ProxyPass        http://some-server/
> > >     ProxyPassReverse http://some-server/
> > >     SetOutputFilter filter-out
> > >     ExtFilterOptions DebugLevel=9
> > > </location>
> > > 
> > > I have a static file and a CGI. The CGI does not return the same
> > headers
> > > as the static file:
> > > 
> > > 
> > > static file:
> > > 
> > > 200 OK
> > > Connection: close
> > > Date: Fri, 28 Jun 2002 23:38:59 GMT
> > > Accept-Ranges: bytes
> > > Server: Apache/1.3.22 (Unix) AxKit/1.5 mod_perl/1.26 mod_ssl/2.8.5
> > > OpenSSL/0.9.6a
> > > Content-Length: 9451
> > > Content-Type: text/html; charset=ISO-8859-1
> > > ETag: "b547-22f-3d1cf32c"
> > > Last-Modified: Fri, 28 Jun 2002 23:37:16 GMT
> > > Client-Date: Fri, 28 Jun 2002 23:38:30 GMT
> > > Client-Peer: 10.10.20.140:80
> > > 
> > > 
> > > CGI:
> > > 
> > > 200 OK
> > > Connection: close
> > > Date: Fri, 28 Jun 2002 23:40:05 GMT
> > > Server: Apache/1.3.22 (Unix) AxKit/1.5 mod_perl/1.26 mod_ssl/2.8.5
> > > OpenSSL/0.9.6a
> > > Content-Type: text/html; charset=ISO-8859-1
> > > Client-Date: Fri, 28 Jun 2002 23:39:35 GMT
> > > Client-Peer: 10.10.20.140:80
> > > 
> > > 
> > > (Remember, this is being passed thru a proxy, apache 2.0.39, which
> > then
> > > applies the filter.)
> > > 
> > > The filter works for the static page but does not work for the CGI.
> > > 
> > > Is it the fact that the "content-length" is missing? Or maybe the
> > "ETag"?
> > > 
> > > How can I fix this? (I need the filter to be applied to the output
> > from
> > > the CGI on the back-end server.)
> > > 
> > > Altering the CGI is not possible. (For a lot of reasons that I won't
> > go
> > > into.)
> > > 
> > > 
> > > TIA!
> > > 
> > > Craig
> > > 
> > > 
> > > ---------------------------------------------------------------------
> > > To unsubscribe, e-mail: users-unsubscribe@httpd.apache.org
> > > For additional commands, e-mail: users-help@httpd.apache.org
> > 
> > 
> > 
> > ---------------------------------------------------------------------
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> 
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