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?
