FastCGI: retrieve the request headers - c++

Question

I’m currently working on a Web C++ application using FastCGI with Apache and mod_fcgid.
I’m trying to retrieve the headers of a request, but I didn’t find how to do so. After some researches, I thought the headers were in the attribute “envp” of “FCGX_Request”, but it contains environment variables such as:
REMOTE_ADDR: 192.168.0.50
SERVER_SOFTWARE: Apache/2.2.21 (Unix) mod_ssl/2.2.21 OpenSSL/1.0.0f DAV/2 mod_fcgid/2.3.6
REDIRECT_UNIQUE_ID: TxytP38AAAEAABpcDskAAAAE
FCGI_ROLE: RESPONDER
HTTP_ACCEPT_LANGUAGE: fr
SERVER_SIGNATURE: <address>Apache/2.2.21 [etc.]
These variables offer me useful informations, but I need the real HTTP headers, and especially “Cookie”. I tried to read on the stream “in” of the “FCGX_Request” but it seems to be for the request body (POST datas). As my application is intended to be multi-threaded, I use “FCGX_Accept_r()”, like this:
while(true)
{
FCGX_Init();
FCGX_Request* fcgiRequest = new FCGX_Request;
FCGX_InitRequest(fcgiRequest, 0, 0);
if(FCGX_Accept_r(fcgiRequest) < 0)
break;
Request* request = new Request(fcgiRequest);
request->process();
}
But actually, I don’t use threads. Requests are executed one after the other.
How can I get the request headers?
Thank you.

Answer 1

Try the following code. It should print out the entire environment so you can find the variable you are looking for.
while(true)
{
FCGX_Init();
FCGX_Request* fcgiRequest = new FCGX_Request;
FCGX_InitRequest(fcgiRequest, 0, 0);
if(FCGX_Accept_r(fcgiRequest) < 0)
break;
char **env = fcgiRequest->envp;
while (*(++env))
puts(*env);
Request* request = new Request(fcgiRequest);
request->process();
}