Function apply_rewrite_list

modules/mappers/mod_rewrite.c:4636–4795

* Apply a complete rule set, * i.e. a list of rewrite rules */

 * i.e. a list of rewrite rules
 */
static int apply_rewrite_list(request_rec *r, apr_array_header_t *rewriterules,
                              char *perdir, rewriterule_entry **lastsub)
{
    rewriterule_entry *entries;
    rewriterule_entry *p;
    int i;
    int changed;
    rule_return_type rc;
    int s;
    rewrite_ctx *ctx;
    int round = 1;

    ctx = apr_palloc(r->pool, sizeof(*ctx));
    ctx->perdir = perdir;
    ctx->r = r;
    *lastsub = NULL;

    /*
     *  Iterate over all existing rules
     */
    entries = (rewriterule_entry *)rewriterules->elts;
    changed = 0;
    loop:
    for (i = 0; i < rewriterules->nelts; i++) {
        p = &entries[i];

        /*
         *  Ignore this rule on subrequests if we are explicitly
         *  asked to do so or this is a proxy-throughput or a
         *  forced redirect rule.
         */
        if (r->main != NULL &&
            (p->flags & RULEFLAG_IGNOREONSUBREQ ||
             p->flags & RULEFLAG_FORCEREDIRECT    )) {
            continue;
        }

        /*
         *  Apply the current rule.
         */
        ctx->vary = NULL;
        rc = apply_rewrite_rule(p, ctx);

        if (rc != RULE_RC_NOMATCH) {

            if (!(p->flags & RULEFLAG_NOSUB)) {
                rewritelog(r, 2, perdir, "setting lastsub to rule with output %s", p->output);
                *lastsub = p;
            }

            /* Catch looping rules with pathinfo growing unbounded */
            if ( strlen( r->filename ) > 2*r->server->limit_req_line ) {
                ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
                              "RewriteRule '%s' and URI '%s' "
                              "exceeded maximum length (%d)", 
                              p->pattern, r->uri, 2*r->server->limit_req_line );
                r->status = HTTP_INTERNAL_SERVER_ERROR;
                return ACTION_STATUS;