Function find_ct

modules/http/mod_mime.c:753–1015

* find_ct is the hook routine for determining content-type and other * MIME-related metadata. It assumes that r->filename has already been * set and stat has been called for r->finfo. It also assumes that the * non-path base file name is not the empty string unless it is a dir. */

 * non-path base file name is not the empty string unless it is a dir.
 */
static int find_ct(request_rec *r)
{
    mime_dir_config *conf;
    apr_array_header_t *exception_list;
    char *ext;
    const char *fn, *fntmp, *type, *charset = NULL, *resource_name, *qm;
    int found_metadata = 0;

    if (r->finfo.filetype == APR_DIR) {
        ap_set_content_type_ex(r, DIR_MAGIC_TYPE, 1);
        return OK;
    }

    if (!r->filename) {
        return DECLINED;
    }

    conf = (mime_dir_config *)ap_get_module_config(r->per_dir_config,
                                                   &mime_module);
    exception_list = apr_array_make(r->pool, 2, sizeof(char *));

    /* If use_path_info is explicitly set to on (value & 1 == 1), append. */
    if (conf->use_path_info & 1) {
        resource_name = apr_pstrcat(r->pool, r->filename, r->path_info, NULL);
    }
    /*
     * In the reverse proxy case r->filename might contain a query string if
     * the nocanon option was used with ProxyPass.
     * If this is the case cut off the query string as the last parameter in
     * this query string might end up on an extension we take care about, but
     * we only want to match against path components not against query
     * parameters.
     */
    else if ((r->proxyreq == PROXYREQ_REVERSE)
             && (apr_table_get(r->notes, "proxy-nocanon"))
             && ((qm = ap_strchr_c(r->filename, '?')) != NULL)) {
        resource_name = apr_pstrmemdup(r->pool, r->filename, qm - r->filename);
    }
    else {
        resource_name = r->filename;
    }

    /* Always drop the path leading up to the file name.
     */
    if ((fn = ap_strrchr_c(resource_name, '/')) == NULL) {
        fn = resource_name;
    }
    else {
        ++fn;
    }


    /* The exception list keeps track of those filename components that
     * are not associated with extensions indicating metadata.
     * The base name is always the first exception (i.e., "txt.html" has
     * a basename of "txt" even though it might look like an extension).
     * Leading dots are considered to be part of the base name (a file named
     * ".png" is likely not a png file but just a hidden file called png).