Function regen_key

modules/cache/mod_cache_disk.c:260–314

}

static const char* regen_key(apr_pool_t *p, apr_table_t *headers,
                             apr_array_header_t *varray, const char *oldkey)
{
    struct iovec *iov;
    int i, k;
    int nvec;
    const char *header;
    const char **elts;

    nvec = (varray->nelts * 2) + 1;
    iov = apr_palloc(p, sizeof(struct iovec) * nvec);
    elts = (const char **) varray->elts;

    /* TODO:
     *    - Handle multiple-value headers better. (sort them?)
     *    - Handle Case in-sensitive Values better.
     *        This isn't the end of the world, since it just lowers the cache
     *        hit rate, but it would be nice to fix.
     *
     * The majority are case insenstive if they are values (encoding etc).
     * Most of rfc2616 is case insensitive on header contents.
     *
     * So the better solution may be to identify headers which should be
     * treated case-sensitive?
     *  HTTP URI's (3.2.3) [host and scheme are insensitive]
     *  HTTP method (5.1.1)
     *  HTTP-date values (3.3.1)
     *  3.7 Media Types [excerpt]
     *     The type, subtype, and parameter attribute names are case-
     *     insensitive. Parameter values might or might not be case-sensitive,
     *     depending on the semantics of the parameter name.
     *  4.20 Except [excerpt]
     *     Comparison of expectation values is case-insensitive for unquoted
     *     tokens (including the 100-continue token), and is case-sensitive for
     *     quoted-string expectation-extensions.
     */

    for (i=0, k=0; i < varray->nelts; i++) {
        header = apr_table_get(headers, elts[i]);
        if (!header) {
            header = "";
        }
        iov[k].iov_base = (char*) elts[i];
        iov[k].iov_len = strlen(elts[i]);
        k++;
        iov[k].iov_base = (char*) header;
        iov[k].iov_len = strlen(header);
        k++;
    }
    iov[k].iov_base = (char*) oldkey;
    iov[k].iov_len = strlen(oldkey);
    k++;

    return apr_pstrcatv(p, iov, k, NULL);
}

static int array_alphasort(const void *fn1, const void *fn2)
{