2 * uhttpd - Tiny single-threaded httpd
4 * Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
5 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
22 #define _XOPEN_SOURCE 700
23 #include <sys/types.h>
24 #include <sys/socket.h>
25 #include <netinet/in.h>
32 #include <libubox/usock.h>
38 static int run_server(void)
47 static void uh_config_parse(void)
49 const char *path = conf.file;
57 path = "/etc/httpd.conf";
63 memset(line, 0, sizeof(line));
65 while (fgets(line, sizeof(line) - 1, c)) {
66 if ((line[0] == '/') && (strchr(line, ':') != NULL)) {
67 if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
68 !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
69 !(eol = strchr(col2, '\n')) || (*eol++ = 0))
72 uh_auth_add(line, col1, col2);
73 } else if (!strncmp(line, "I:", 2)) {
74 if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
75 !(eol = strchr(col1, '\n')) || (*eol++ = 0))
78 uh_index_add(strdup(col1));
79 } else if (!strncmp(line, "E404:", 5)) {
80 if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
81 !(eol = strchr(col1, '\n')) || (*eol++ = 0))
84 conf.error_handler = strdup(col1);
87 else if ((line[0] == '*') && (strchr(line, ':') != NULL)) {
88 if (!(col1 = strchr(line, '*')) || (*col1++ = 0) ||
89 !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
90 !(eol = strchr(col2, '\n')) || (*eol++ = 0))
93 if (!uh_interpreter_add(col1, col2))
95 "Unable to add interpreter %s for extension %s: "
96 "Out of memory\n", col2, col1
105 static int add_listener_arg(char *arg, bool tls)
111 s = strrchr(arg, ':');
118 return uh_socket_bind(host, port, tls);
121 static int usage(const char *name)
124 "Usage: %s -p [addr:]port -h docroot\n"
125 " -f Do not fork to background\n"
126 " -c file Configuration file, default is '/etc/httpd.conf'\n"
127 " -p [addr:]port Bind to specified address and port, multiple allowed\n"
129 " -s [addr:]port Like -p but provide HTTPS on this port\n"
130 " -C file ASN.1 server certificate file\n"
131 " -K file ASN.1 server private key file\n"
133 " -h directory Specify the document root, default is '.'\n"
134 " -E string Use given virtual URL as 404 error handler\n"
135 " -I string Use given filename as index for directories, multiple allowed\n"
136 " -S Do not follow symbolic links outside of the docroot\n"
137 " -D Do not allow directory listings, send 403 instead\n"
138 " -R Enable RFC1918 filter\n"
139 " -n count Maximum allowed number of concurrent requests\n"
141 " -l string URL prefix for Lua handler, default is '/lua'\n"
142 " -L file Lua handler script, omit to disable Lua\n"
145 " -u string URL prefix for HTTP/JSON handler\n"
146 " -U file Override ubus socket path\n"
148 " -x string URL prefix for CGI handler, default is '/cgi-bin'\n"
149 " -i .ext=path Use interpreter at path for files with the given extension\n"
150 " -t seconds CGI, Lua and UBUS script timeout in seconds, default is 60\n"
151 " -T seconds Network timeout in seconds, default is 30\n"
152 " -d string URL decode given string\n"
153 " -r string Specify basic auth realm\n"
154 " -m string MD5 crypt given string\n"
160 static void init_defaults(void)
162 conf.script_timeout = 60;
163 conf.network_timeout = 30;
164 conf.http_keepalive = 20;
165 conf.max_requests = 3;
166 conf.realm = "Protected Area";
167 conf.cgi_prefix = "/cgi-bin";
168 conf.cgi_path = "/sbin:/usr/sbin:/bin:/usr/bin";
170 uh_index_add("index.html");
171 uh_index_add("index.htm");
172 uh_index_add("default.html");
173 uh_index_add("default.htm");
176 static void fixup_prefix(char *str)
183 len = strlen(str) - 1;
185 while (len > 0 && str[len] == '/')
191 int main(int argc, char **argv)
199 BUILD_BUG_ON(sizeof(uh_buf) < PATH_MAX);
201 uh_dispatch_add(&cgi_dispatch);
203 signal(SIGPIPE, SIG_IGN);
205 while ((ch = getopt(argc, argv, "fSDRC:K:E:I:p:s:h:c:l:L:d:r:m:n:x:i:t:T:A:u:U:")) != -1) {
213 bound += add_listener_arg(optarg, tls);
217 if (!realpath(optarg, uh_buf)) {
218 fprintf(stderr, "Error: Invalid directory %s: %s\n",
219 optarg, strerror(errno));
222 conf.docroot = strdup(uh_buf);
226 if (optarg[0] != '/') {
227 fprintf(stderr, "Error: Invalid error handler: %s\n",
231 conf.error_handler = optarg;
235 if (optarg[0] == '/') {
236 fprintf(stderr, "Error: Invalid index page: %s\n",
240 uh_index_add(optarg);
244 conf.no_symlinks = 1;
248 conf.no_dirlists = 1;
252 conf.rfc1918_filter = 1;
256 conf.max_requests = atoi(optarg);
260 fixup_prefix(optarg);
261 conf.cgi_prefix = optarg;
265 port = strchr(optarg, '=');
266 if (optarg[0] != '.' || !port) {
267 fprintf(stderr, "Error: Invalid interpreter: %s\n",
273 uh_interpreter_add(optarg, port);
277 conf.script_timeout = atoi(optarg);
281 conf.network_timeout = atoi(optarg);
285 conf.tcp_keepalive = atoi(optarg);
293 port = alloca(strlen(optarg) + 1);
297 /* "decode" plus to space to retain compat */
298 for (opt = 0; optarg[opt]; opt++)
299 if (optarg[opt] == '+')
302 /* opt now contains strlen(optarg) -- no need to re-scan */
303 if (uh_urldecode(port, opt, optarg, opt) < 0) {
304 fprintf(stderr, "uhttpd: invalid encoding\n");
311 /* basic auth realm */
318 printf("%s\n", crypt(optarg, "$1$"));
328 return usage(argv[0]);
335 fprintf(stderr, "Error: No sockets bound, unable to continue\n");
339 /* fork (if not disabled) */
351 cur_fd = open("/dev/null", O_WRONLY);