Function splitout_queryargs

modules/mappers/mod_rewrite.c:837–896

* split out a QUERY_STRING part from * the current URI string */

 * the current URI string
 */
static void splitout_queryargs(request_rec *r, int flags)
{
    char *q;
    int split, skip;
    int qsappend = flags & RULEFLAG_QSAPPEND;
    int qsdiscard = flags & RULEFLAG_QSDISCARD;
    int qslast = flags & RULEFLAG_QSLAST;

    if (flags & RULEFLAG_QSNONE) {
        rewritelog(r, 2, NULL, "discarding query string, no parse from substitution");
        r->args = NULL;
        return;
    }

    /* don't touch, unless it's a scheme for which a query string makes sense.
     * See RFC 1738 and RFC 2368.
     */
    if ((skip = is_absolute_uri(r->filename, &split))
        && !split) {
        r->args = NULL; /* forget the query that's still flying around */
        return;
    }

    if (qsdiscard) {
        r->args = NULL; /* Discard query string */
        rewritelog(r, 2, NULL, "discarding query string");
    }

    q = qslast ? ap_strrchr(r->filename + skip, '?') : ap_strchr(r->filename + skip, '?');

    if (q != NULL) {
        char *olduri;
        apr_size_t len;

        olduri = apr_pstrdup(r->pool, r->filename);
        *q++ = '\0';
        if (qsappend) {
            if (*q) {
                r->args = apr_pstrcat(r->pool, q, "&" , r->args, NULL);
            }
        }
        else {
            r->args = apr_pstrdup(r->pool, q);
        }

        if (r->args) {
           len = strlen(r->args);

           if (!len) {
               r->args = NULL;
           }
           else if (r->args[len-1] == '&') {
               r->args[len-1] = '\0';
           }
        }

        rewritelog(r, 3, NULL, "split uri=%s -> uri=%s, args=%s", olduri,
                   r->filename, r->args ? r->args : "<none>");