/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <stdbool.h> #include "string-util.h" #include "utf8.h" #include "web-util.h" bool http_etag_is_valid(const char *etag) { if (isempty(etag)) return false; if (!endswith(etag, "\"")) return false; if (!startswith(etag, "\"") && !startswith(etag, "W/\"")) return false; return true; } bool http_url_is_valid(const char *url) { const char *p; if (isempty(url)) return false; p = startswith(url, "http://"); if (!p) p = startswith(url, "https://"); if (!p) return false; if (isempty(p)) return false; return ascii_is_valid(p); } bool documentation_url_is_valid(const char *url) { const char *p; if (isempty(url)) return false; if (http_url_is_valid(url)) return true; p = startswith(url, "file:/"); if (!p) p = startswith(url, "info:"); if (!p) p = startswith(url, "man:"); if (isempty(p)) return false; return ascii_is_valid(p); }