Problem with inbuilt Solaris Apache Web Server v 2.0.58

Question

Hi,
Set-up:
We are working on a custom application which works with the inbuilt Apache Web Server on the Sun Solaris platform. Here are the details of the versions of the various components involved:
Apache Web Server: Version 2.0.58
Platform: SunOS 5.10 Generic_127111-03
Our application is in the form of a shared library(.so binary) which is loaded into the Apache Web Server by mentioning the following directive in the Apache Web Server's configuration file (httpd.conf).
LoadModule at_module "/var/apache2/logs/sample/sample.so"
where, sample.so is our application's binary
and at_module is the name of the module.
httpd.conf file has been attached for your reference.
Attachments:
httpd.conf - Apache Web Server's configuration file.
sample-apache.cpp - Sample program which is showing the problem.
httpd.h - Apache Software Foundation's file which contains the structure "request_rec" that represents the current request.
Problem summary:
For each request to the Apache Web server, the server maintains a table of type "apr_table_t" which contains the header environment from the request. There is a structure "request_rec" maintained in the httpd.h file:
/** A structure that represents the current request */
struct request_rec {
/** The pool associated with the request */
apr_pool_t *pool;
/** Request method (eg. GET, HEAD, POST, etc.) */
const char *method;
/** MIME header environment from the request */
apr_table_t *headers_in;
In our case, when we try to retrieve the address of "headers_in", we get a NULL Value. Please refer to the attached "sample-apache.cpp" program. In this program, inside the access_checker() method, we try to retrieve the address of "headers_in" and get that as NULL:
extern "C" int access_checker(request_rec *r)
     FILE * fp;
     fp = fopen("/var/apache2/logs/sample.txt", "a");
     fprintf(fp, "\n r->headers_in = %u, r->method = %s", r->headers_in, r->method);
     fclose(fp);
     return OK;
Here is the output of the sample program after accessing the main page of the Web server:
r->headers_in = 0, r->method = GET
r->headers_in = 0, r->method = GET
r->headers_in = 0, r->method = GET
Though we are able to retrieve one member of the structure request_rec (method), we are not able to retrieve the address of the other member (headers_in).
Observation:
We made an interesting observation that when we used the same sample program with the inbuilt Apache 2.0.52 Web Server on Solaris, we were able to successfully retrieve the address of headers_in. Here are the details of the set-up which is working fine:
Apache Web Server: Version 2.0.52
Platform : SunOS 5.10 Generic_118822-30
Thus, there is something different which has happened between the Sun's Solaris Apache Web Server's versions 2.0.52 and 2.0.58 which is making it unable to retrieve the address of the request headers (headers_in).
I am requesting someone to kindly shed light on this difference and let us know if we need to change the way of retrieving the request headers for Solaris Apache 2.0.58.
Thanks,
Atul.

Answer 1

The only way you can achieve it is by running the web server to listen on port 80
Please change the port in your httpd.conf file for the webserver and restart it.
If any other processes are running/using on port 80 on that machine, then please stop them, otherwise you will not be able to achieve your requirement.
Arun