---- oh...@cox.net wrote:
> Hi,
>
> This is a followup to an earlier post/question, "How to access client
> certificate PEM and incoming request headers in a module?".
>
> As before, I'm starting with mod_headers.c, and then tweaking it, partly
> experimenting with modules, and partly for a project that I'm working on
> (eventually).
>
> What I'm trying to do now is:
>
> - I have a test Tomcat instance that is being proxied by Apache, with a small
> JSP that just dumps the HTTP headers
> - The Apache has my modified mod_headers.
>
> I now need to add ("inject") an additional cookie to the incoming request so
> that when the JSP dumps the headers, it'll show whatever cookies originally
> existed, plus the one that my modified mod_headers module added.
>
> As before, I'm adding my code to the beginning of
> "ap_headers_insert_output_filter()" in mod_headers.c:
>
> printf("\n\nIn ap_headers_insert_output_filter: About to call FIRST
> dump_request...\n");
> dump_request(r);
> printf("In ap_headers_insert_output_filter: Returned from calling FIRST
> dump_request...\n");
>
> printf("\n\nIn ap_headers_insert_output_filter: About to call
> apr_table_addn() to add 'Cookie' to r->headers_in\n");
> apr_table_addn(r->headers_in, "Cookie",
> "MyCookie=AAAAAAAAAAAAAAAABBBBBBBBBBB");
> printf("In ap_headers_insert_output_filter: Returned from calling
> apr_table_addn()...\n");
>
> printf("\n\nIn ap_headers_insert_output_filter: About to call
> ap_headers_fixup()...\n");
> ap_headers_fixup(r);
> printf("In ap_headers_insert_output_filter: Returned from calling
> ap_headers_fixup()...\n");
>
> printf("\n\nIn ap_headers_insert_output_filter: About to call SECOND
> dump_request()...\n");
> dump_request(r);
> printf("In ap_headers_insert_output_filter: Returned from calling SECOND
> dump_request()...\n");
>
> .I'm running Apache in single process mode, so I can see the printf output,
> and for that first call to dump_request(), I can see a "Cookie" header with a
> JSESSION cookie, and then in the second call to dump_request, I can see a
> "Cookie" header, but it has only my "MyCookie" cookie. In other words, it
> looks like when the:
>
> apr_table_addn(r->headers_in, "Cookie",
> "MyCookie=AAAAAAAAAAAAAAAABBBBBBBBBBB");
>
> was executed, it overwrote the "Cookie" header in the r->headers_in table?
>
> Can anyone tell me how I can *add* a cookie in my module?
>
> Thanks,
> Jim
>
> P.S. BTW, by the time the headers are displayed by the JSP on the proxied
> Tomcat, it shows ONLY the JSESSIONID cookie, i.e., it doesn't look like the
> MyCookie cookie got passed to Tomcat?
Hi,
I think that I found one way to fix this. Instead of:
apr_table_addn(r->headers_in, "Cookie", "MyCookie=AAAAAAAAAAAAAAAABBBBBBBBBBB");
I did:
apr_table_mergen(r->headers_in, "Cookie",
"MyCookie=AAAAAAAAAAAAAAAABBBBBBBBBBB");
and I now see the cookie that I added, both in the dump_request() output and in
the JSP output.
Jim
