$_[0] =~ s/%HTTP_HOST%/&handleEnvVariable('HTTP_HOST')/ge;
    $_[0] =~ s/%REMOTE_ADDR%/&handleEnvVariable('REMOTE_ADDR')/ge;
    $_[0] =~ s/%REMOTE_PORT%/&handleEnvVariable('REMOTE_PORT')/ge;
    $_[0] =~ s/%REMOTE_USER%/&handleEnvVariable('REMOTE_USER')/ge;