/* Determine the HTTP user agent */
/* See RFC2616 §2.2 token definition and §3.8 user-agent header */
p_sys->psz_user_agent = var_InheritString( p_access, "http-user-agent" );
- for( char *p = p_sys->psz_user_agent; *p; p++ )
+ if (p_sys->psz_user_agent)
{
- uint8_t c = *p;
- if( c < 32 || strchr( "()<>@,;:\\\"[]?={}", c ) )
- *p = '_'; /* remove potentially harmful characters */
+ for( char *p = p_sys->psz_user_agent; *p; p++ )
+ {
+ uint8_t c = *p;
+ if( c < 32 || strchr( "()<>@,;:\\\"[]?={}", c ) )
+ *p = '_'; /* remove potentially harmful characters */
+ }
}
/* Check proxy */