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/data.cpp

@@ -21,3 +21,27 @@ Data::Data()
 
 
 
+void Data::SetAdditionalVariables()
+{
+	SetHttpHost();
+}
+
+
+
+void Data::SetHttpHost()
+{
+	if( strncmp(base_url.c_str(), "http://", 7) == 0 )
+		base_url_http_host = base_url.substr(7);	
+	else
+	if( strncmp(base_url.c_str(), "https://", 8) == 0 )
+		base_url_http_host = base_url.substr(8);	
+	else
+		base_url_http_host.clear();
+
+	if( base_url_http_host.empty() )
+		return;
+		
+	// removing the last slash (if it is present)
+	if( base_url_http_host[ base_url_http_host.size() - 1 ] == '/' )
+		base_url_http_host.erase( base_url_http_host.end() - 1 );
+}