/*
 * url_redir.c: Do redirections based on uri instead of ppath
 *
 *
 * I'm using clf-request here because this easily shows the query string
 * without doing a lot of other work. This is just a proof-of-concept
 * program, no warranties, etc apply.
 * 
 * Rob Crittenden 10-02-2001
 *
 * How to install this program:
 *
 *    Add the following lines to your obj.conf:
 *
 *    Init fn=load-modules shlib=<path to url_redir.so> funcs=url_redir_init
 *     ...
 *    NameTrans fn=url-redir from="*foo=bar*" url="http://www.greyoak.com/"
 *
 */

#include "nsapi.h"

/* 
 * url_redir()
 *
 */
NSAPI_PUBLIC int url_redir(pblock *pb, Session *sn, Request *rq)
{
    char *uri = pblock_findval("clf-request", rq->reqpb);
    char *from = pblock_findval("from", pb);
    char *url = pblock_findval("url", pb);

    if (!uri) {
        log_error(LOG_WARN, "url-redir", sn, rq,
                  "Somehow there is no client request, this shouldn't happen");
        return REQ_ABORTED;
    }

    if (!from || !url) {
        log_error(LOG_MISCONFIG, "url-redir", sn, rq,
                  "Both url and from are required.");
        return REQ_NOACTION;
    }

    if (!WILDPAT_CMP(uri, from)) {
        protocol_status(sn, rq, PROTOCOL_REDIRECT, NULL);
        pblock_nvinsert("url", url, rq->vars);
        return REQ_ABORTED;
    }

    return REQ_NOACTION;
}