Function ap_if_walk_sub

server/request.c:1852–1990

}

static int ap_if_walk_sub(request_rec *r, core_dir_config* dconf)
{
    ap_conf_vector_t *now_merged = NULL;
    ap_conf_vector_t **sec_ent = NULL;
    int num_sec = 0;
    walk_cache_t *cache;
    int cached;
    int sec_idx;
    int matches;
    int cached_matches;
    int prev_result = -1;
    walk_walked_t *last_walk;

    if (dconf && dconf->sec_if) {
        sec_ent = (ap_conf_vector_t **)dconf->sec_if->elts;
        num_sec = dconf->sec_if->nelts;
    }

    /* No tricks here, there are just no <If > to parse in this context.
     * We won't destroy the cache, just in case _this_ redirect is later
     * redirected again to a context containing the same or similar <If >.
     */
    if (!num_sec) {
        return OK;
    }

    cache = prep_walk_cache(AP_NOTE_IF_WALK, r);
    cached = (cache->cached != NULL);
    cache->cached = (void *)1;
    matches = cache->walked->nelts;
    cached_matches = matches;
    last_walk = (walk_walked_t*)cache->walked->elts;

    cached &= auth_internal_per_conf;

    /* Go through the if entries, and check for matches  */
    for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
        const char *err = NULL;
        core_dir_config *entry_core;
        int rc;
        entry_core = ap_get_core_module_config(sec_ent[sec_idx]);

        AP_DEBUG_ASSERT(entry_core->condition_ifelse != 0);
        if (entry_core->condition_ifelse & AP_CONDITION_ELSE) {
            AP_DEBUG_ASSERT(prev_result != -1);
            if (prev_result == 1)
                continue;
        }

        if (entry_core->condition_ifelse & AP_CONDITION_IF) {
            rc = ap_expr_exec(r, entry_core->condition, &err);
            if (rc <= 0) {
                if (rc < 0)
                    ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00039)
                                  "Failed to evaluate <If > condition: %s",
                                  err);
                prev_result = 0;
                continue;