added: config: base_url_redirect

when true the server checks whether HTTP_HOST environment variable
       is the same as base_url from the config (of course without the 'http://' part
       and the last slash) - if it's not the same then the server
       redirects you into a new location base_url+REQUEST_URI
changed: variables env_* from Request are never null (after Request::Read())
       if the server didn't set such a variable it will be pointing into an empty string "\0"


git-svn-id: svn://ttmath.org/publicrep/cmslu/trunk@465 e52654a7-88a9-db11-a3e9-0013d4bc506e

core/requestcontroller.cpp

@@ -109,6 +109,23 @@ return true;
 
 
 
+bool RequestController::BaseUrlRedirect()
+{
+	if( request.env_request_uri[0] == 0 )
+		return false;
+	
+	if( data.base_url_http_host == request.env_http_host )
+		return false;
+
+	request.result = Request::redirect;
+	request.str = data.base_url + (request.env_request_uri + 1); // +1 means skipping the first slash from env_request_uri
+	
+	
+return true;
+}
+
+
+
 void RequestController::Loop()
 {
 	while( FCGX_Accept(&request.in, &request.out, &request.err, &request.env) == 0 )
@@ -119,13 +136,19 @@ void RequestController::Loop()
 		{
 			request.Clear();
 			request.Read();	
-		
-			session_manager.SetSession(); // setting request.session as well
-			request.session->CheckTimers();
-			
-			content.Make();
+
+			// when BaseUrlRedirect() return true we didn't have to set everything in request.Read()
+			// in the future request.Read() can be split and at the beginning only environment variables will be read
+			// and then BaseUrlRedirect() will be called (for performance)
+			if( !BaseUrlRedirect() )
+			{
+				session_manager.SetSession(); // setting request.session as well
+				request.session->CheckTimers();
+				
+				content.Make();
+			}
+	
 			request.SendAll();	
-		
 		}
 		catch(const std::exception & e)
 		{