2 * This file is part of DisOrder
3 * Copyright (C) 2007, 2008 Richard Kettlewell
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 * @brief URL support functions
32 /** @brief Infer the for the web interface
33 * @param include_path_info 1 to include post-script path, else 0
34 * @return Inferred URL
36 * See <a href="http://tools.ietf.org/html/rfc3875">RFC 3875</a>.
38 char *infer_url(int include_path_info) {
39 const char *scheme = "http", *server, *script, *e, *request_uri, *path_info;
43 /* mod_ssl sets HTTPS=on if the scheme is https */
44 if((e = getenv("HTTPS")) && !strcmp(e, "on"))
47 /* Figure out the server. 'MUST' be set and we don't cope if it
49 if(!(server = getenv("SERVER_NAME")))
50 disorder_fatal(0, "SERVER_NAME is not set");
51 server = xstrdup(server);
53 /* Figure out the port. 'MUST' be set but we cope if it is not. */
54 if((e = getenv("SERVER_PORT")))
59 /* Figure out path to ourselves. */
60 if(include_path_info && (request_uri = getenv("REQUEST_URI"))) {
61 /* REQUEST_URI is an Apache extexnsion. If it's available it results in
62 * more accurate self-referencing URLs. */
63 if((e = strchr(request_uri, '?')))
64 script = xstrndup(request_uri, e - request_uri);
66 script = xstrdup(request_uri);
69 if(!(script = getenv("SCRIPT_NAME")))
70 disorder_fatal(0, "SCRIPT_NAME is not set");
71 /* SCRIPT_NAME may be "" */
74 /* SCRIPT_NAME is not URL-encoded */
75 script = urlencodestring(script);
76 if(include_path_info && (path_info = getenv("PATH_INFO")))
77 byte_xasprintf((char **)&script, "%s%s",
78 script, urlencodestring(path_info));
81 disorder_fatal(0, "SCRIPT_NAME does not start with a '/'");
82 script = xstrdup(script);
85 byte_xasprintf(&url, "%s://%s%s",
86 scheme, server, script);
88 byte_xasprintf(&url, "%s://%s:%d%s",
89 scheme, server, port, script);
93 /** @brief Parse a URL
94 * @param url URL to parsed
95 * @param parsed Where to store parsed URL data
96 * @return 0 on success, non-0 on error
98 * NB that URLs with usernames and passwords are NOT currently supported.
100 int parse_url(const char *url, struct url *parsed) {
105 for(s = url; *s && *s != '/' && *s != ':'; ++s)
108 parsed->scheme = xstrndup(url, s - url);
113 /* The host and port */
114 if(*url == '/' && url[1] == '/') {
115 /* //user:password@host:port, but we don't support the
116 * user:password@ part. */
118 for(s = url; *s && *s != '/' && *s != ':'; ++s)
120 parsed->host = xstrndup(url, s - url);
122 /* We have host:port[/...] */
125 n = strtol(s, (char **)&url, 10);
128 if(n < 0 || n > 65535)
132 /* We just have host[/...] */
139 for(s = url; *s && *s != '?'; ++s)
141 if(!(parsed->path = urldecodestring(url, s - url)))
147 parsed->query = xstrdup(url + 1);