+/*********************************************************************
+ *
+ * Function : content_requires_filtering
+ *
+ * Description : Checks whether there are any content filters
+ * enabled for the current request and if they
+ * can actually be applied..
+ *
+ * Parameters :
+ * 1 : csp = Current client state (buffers, headers, etc...)
+ *
+ * Returns : TRUE for yes, FALSE otherwise
+ *
+ *********************************************************************/
+int content_requires_filtering(struct client_state *csp)
+{
+ if ((csp->content_type & CT_TABOO)
+ && !(csp->action->flags & ACTION_FORCE_TEXT_MODE))
+ {
+ return FALSE;
+ }
+
+ /*
+ * Are we enabling text mode by force?
+ */
+ if (csp->action->flags & ACTION_FORCE_TEXT_MODE)
+ {
+ /*
+ * Do we really have to?
+ */
+ if (csp->content_type & CT_TEXT)
+ {
+ log_error(LOG_LEVEL_HEADER, "Text mode is already enabled.");
+ }
+ else
+ {
+ csp->content_type |= CT_TEXT;
+ log_error(LOG_LEVEL_HEADER, "Text mode enabled by force. Take cover!");
+ }
+ }
+
+ if (!(csp->content_type & CT_DECLARED))
+ {
+ /*
+ * The server didn't bother to declare a MIME-Type.
+ * Assume it's text that can be filtered.
+ *
+ * This also regulary happens with 304 responses,
+ * therefore logging anything here would cause
+ * too much noise.
+ */
+ csp->content_type |= CT_TEXT;
+ }
+
+ /*
+ * Choose the applying filter function based on
+ * the content type and action settings.
+ */
+ if ((csp->content_type & CT_TEXT) &&
+ (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]) ||
+ !list_is_empty(csp->action->multi[ACTION_MULTI_EXTERNAL_FILTER])))
+ {
+ return TRUE;
+ }
+ else if ((csp->content_type & CT_GIF) &&
+ (csp->action->flags & ACTION_DEANIMATE))
+ {
+ return TRUE;
+ }
+
+ return FALSE;
+
+}
+
+