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36bde473 | 1 | /* |
2 | * This file is part of DisOrder | |
5aff007d | 3 | * Copyright (C) 2007, 2008 Richard Kettlewell |
36bde473 | 4 | * |
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 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
20 | /** @file lib/url.c | |
21 | * @brief URL support functions | |
22 | */ | |
23 | ||
05b75f8d | 24 | #include "common.h" |
36bde473 | 25 | |
36bde473 | 26 | #include <errno.h> |
27 | ||
28 | #include "mem.h" | |
29 | #include "log.h" | |
30 | #include "printf.h" | |
31 | #include "url.h" | |
32 | #include "kvp.h" | |
33 | ||
34 | /** @brief Infer the for the web interface | |
35 | * @return Inferred URL | |
36 | * | |
37 | * See <a href="http://tools.ietf.org/html/rfc3875">RFC 3875</a>. | |
38 | */ | |
39 | char *infer_url(void) { | |
0688055d | 40 | const char *scheme = "http", *server, *script, *e, *request_uri; |
36bde473 | 41 | char *url; |
42 | int port; | |
3c35e8a0 RK |
43 | |
44 | /* mod_ssl sets HTTPS=on if the scheme is https */ | |
45 | if((e = getenv("HTTPS")) && !strcmp(e, "on")) | |
46 | scheme = "https"; | |
36bde473 | 47 | |
48 | /* Figure out the server. 'MUST' be set and we don't cope if it | |
49 | * is not. */ | |
50 | if(!(server = getenv("SERVER_NAME"))) | |
51 | fatal(0, "SERVER_NAME is not set"); | |
52 | server = xstrdup(server); | |
53 | ||
54 | /* Figure out the port. 'MUST' be set but we cope if it is not. */ | |
55 | if((e = getenv("SERVER_PORT"))) | |
56 | port = atoi(e); | |
57 | else | |
58 | port = 80; | |
59 | ||
0688055d | 60 | /* Figure out path to ourselves. */ |
61 | if((request_uri = getenv("REQUEST_URI"))) { | |
62 | /* REQUEST_URI is an Apache extexnsion. If it's available it results in | |
63 | * more accurate self-referencing URLs. */ | |
64 | if((e = strchr(request_uri, '?'))) | |
65 | script = xstrndup(request_uri, e - request_uri); | |
66 | else | |
67 | script = xstrdup(request_uri); | |
68 | } else { | |
69 | /* RFC3875 s4.1.13 */ | |
70 | if(!(script = getenv("SCRIPT_NAME"))) | |
71 | fatal(0, "SCRIPT_NAME is not set"); | |
72 | /* SCRIPT_NAME may be "" */ | |
73 | if(!*script) | |
74 | script = "/"; | |
75 | /* SCRIPT_NAME is not URL-encoded */ | |
76 | script = urlencodestring(script); | |
77 | } | |
36bde473 | 78 | if(script[0] != '/') |
79 | fatal(0, "SCRIPT_NAME does not start with a '/'"); | |
80 | script = xstrdup(script); | |
81 | ||
82 | if(port == 80) | |
83 | byte_xasprintf(&url, "%s://%s%s", | |
84 | scheme, server, script); | |
85 | else | |
86 | byte_xasprintf(&url, "%s://%s:%d%s", | |
87 | scheme, server, port, script); | |
88 | return url; | |
89 | } | |
90 | ||
91 | /** @brief Parse a URL | |
92 | * @param url URL to parsed | |
93 | * @param parsed Where to store parsed URL data | |
94 | * @return 0 on success, non-0 on error | |
95 | * | |
96 | * NB that URLs with usernames and passwords are NOT currently supported. | |
97 | */ | |
98 | int parse_url(const char *url, struct url *parsed) { | |
99 | const char *s; | |
100 | long n; | |
101 | ||
102 | /* The scheme */ | |
103 | for(s = url; *s && *s != '/' && *s != ':'; ++s) | |
104 | ; | |
105 | if(*s == ':') { | |
106 | parsed->scheme = xstrndup(url, s - url); | |
107 | url = s + 1; | |
108 | } else | |
109 | parsed->scheme = 0; | |
110 | ||
111 | /* The host and port */ | |
112 | if(*url == '/' && url[1] == '/') { | |
113 | /* //user:password@host:port, but we don't support the | |
114 | * user:password@ part. */ | |
115 | url += 2; | |
116 | for(s = url; *s && *s != '/' && *s != ':'; ++s) | |
117 | ; | |
118 | parsed->host = xstrndup(url, s - url); | |
119 | if(*s == ':') { | |
120 | /* We have host:port[/...] */ | |
121 | ++s; | |
122 | errno = 0; | |
123 | n = strtol(s, (char **)&url, 10); | |
124 | if(errno) | |
125 | return -1; | |
126 | if(n < 0 || n > 65535) | |
127 | return -1; | |
128 | parsed->port = n; | |
129 | } else { | |
130 | /* We just have host[/...] */ | |
131 | url = s; | |
132 | parsed->port = -1; | |
133 | } | |
134 | } | |
135 | ||
136 | /* The path */ | |
137 | for(s = url; *s && *s != '?'; ++s) | |
138 | ; | |
139 | if(!(parsed->path = urldecodestring(url, s - url))) | |
140 | return -1; | |
141 | url = s; | |
142 | ||
143 | /* The query */ | |
144 | if(*url == '?') | |
145 | parsed->query = xstrdup(url + 1); | |
146 | else | |
147 | parsed->query = 0; | |
148 | ||
149 | return 0; | |
150 | } | |
151 | ||
152 | /* | |
153 | Local Variables: | |
154 | c-basic-offset:2 | |
155 | comment-column:40 | |
156 | fill-column:79 | |
157 | indent-tabs-mode:nil | |
158 | End: | |
159 | */ |