2 * uhttpd - Tiny single-threaded httpd
4 * Copyright (C) 2010-2013 Jo-Philipp Wich <xm@subsignal.org>
5 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
7 * Permission to use, copy, modify, and/or distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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>
39 static int run_server(void)
43 uh_plugin_post_init();
49 static void uh_config_parse(void)
51 const char *path = conf.file;
59 path = "/etc/httpd.conf";
65 memset(line, 0, sizeof(line));
67 while (fgets(line, sizeof(line) - 1, c)) {
68 if ((line[0] == '/') && (strchr(line, ':') != NULL)) {
69 if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
70 !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
71 !(eol = strchr(col2, '\n')) || (*eol++ = 0))
74 uh_auth_add(line, col1, col2);
75 } else if (!strncmp(line, "I:", 2)) {
76 if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
77 !(eol = strchr(col1, '\n')) || (*eol++ = 0))
80 uh_index_add(strdup(col1));
81 } else if (!strncmp(line, "E404:", 5)) {
82 if (!(col1 = strchr(line, ':')) || (*col1++ = 0) ||
83 !(eol = strchr(col1, '\n')) || (*eol++ = 0))
86 conf.error_handler = strdup(col1);
88 else if ((line[0] == '*') && (strchr(line, ':') != NULL)) {
89 if (!(col1 = strchr(line, '*')) || (*col1++ = 0) ||
90 !(col2 = strchr(col1, ':')) || (*col2++ = 0) ||
91 !(eol = strchr(col2, '\n')) || (*eol++ = 0))
94 uh_interpreter_add(col1, col2);
101 static int add_listener_arg(char *arg, bool tls)
108 s = strrchr(arg, ':');
115 if (host && *host == '[') {
123 return uh_socket_bind(host, port, tls);
126 static int usage(const char *name)
129 "Usage: %s -p [addr:]port -h docroot\n"
130 " -f Do not fork to background\n"
131 " -c file Configuration file, default is '/etc/httpd.conf'\n"
132 " -p [addr:]port Bind to specified address and port, multiple allowed\n"
134 " -s [addr:]port Like -p but provide HTTPS on this port\n"
135 " -C file ASN.1 server certificate file\n"
136 " -K file ASN.1 server private key file\n"
137 " -q Redirect all HTTP requests to HTTPS\n"
139 " -h directory Specify the document root, default is '.'\n"
140 " -E string Use given virtual URL as 404 error handler\n"
141 " -I string Use given filename as index for directories, multiple allowed\n"
142 " -S Do not follow symbolic links outside of the docroot\n"
143 " -D Do not allow directory listings, send 403 instead\n"
144 " -R Enable RFC1918 filter\n"
145 " -n count Maximum allowed number of concurrent script requests\n"
146 " -N count Maximum allowed number of concurrent connections\n"
148 " -l string URL prefix for Lua handler, default is '/lua'\n"
149 " -L file Lua handler script, omit to disable Lua\n"
152 " -u string URL prefix for UBUS via JSON-RPC handler\n"
153 " -U file Override ubus socket path\n"
154 " -a Do not authenticate JSON-RPC requests against UBUS session api\n"
155 " -X Enable CORS HTTP headers on JSON-RPC api\n"
157 " -x string URL prefix for CGI handler, default is '/cgi-bin'\n"
158 " -i .ext=path Use interpreter at path for files with the given extension\n"
159 " -t seconds CGI, Lua and UBUS script timeout in seconds, default is 60\n"
160 " -T seconds Network timeout in seconds, default is 30\n"
161 " -k seconds HTTP keepalive timeout\n"
162 " -d string URL decode given string\n"
163 " -r string Specify basic auth realm\n"
164 " -m string MD5 crypt given string\n"
170 static void init_defaults_pre(void)
172 conf.script_timeout = 60;
173 conf.network_timeout = 30;
174 conf.http_keepalive = 20;
175 conf.max_script_requests = 3;
176 conf.max_connections = 100;
177 conf.realm = "Protected Area";
178 conf.cgi_prefix = "/cgi-bin";
179 conf.cgi_path = "/sbin:/usr/sbin:/bin:/usr/bin";
182 static void init_defaults_post(void)
184 uh_index_add("index.html");
185 uh_index_add("index.htm");
186 uh_index_add("default.html");
187 uh_index_add("default.htm");
189 if (conf.cgi_prefix) {
190 char *str = malloc(strlen(conf.docroot) + strlen(conf.cgi_prefix) + 1);
191 strcpy(str, conf.docroot);
192 strcat(str, conf.cgi_prefix);
193 conf.cgi_docroot_path = str;
197 static void fixup_prefix(char *str)
204 len = strlen(str) - 1;
206 while (len >= 0 && str[len] == '/')
212 int main(int argc, char **argv)
222 const char *tls_key = NULL, *tls_crt = NULL;
225 BUILD_BUG_ON(sizeof(uh_buf) < PATH_MAX);
227 uh_dispatch_add(&cgi_dispatch);
229 signal(SIGPIPE, SIG_IGN);
231 while ((ch = getopt(argc, argv, "afqSDRXC:K:E:I:p:s:h:c:l:L:d:r:m:n:N:x:i:t:k:T:A:u:U:")) != -1) {
243 conf.tls_redirect = 1;
254 fprintf(stderr, "uhttpd: TLS support not compiled, "
255 "ignoring -%c\n", ch);
259 optarg = strdup(optarg);
260 bound += add_listener_arg(optarg, (ch == 's'));
264 if (!realpath(optarg, uh_buf)) {
265 fprintf(stderr, "Error: Invalid directory %s: %s\n",
266 optarg, strerror(errno));
269 conf.docroot = strdup(uh_buf);
273 if (optarg[0] != '/') {
274 fprintf(stderr, "Error: Invalid error handler: %s\n",
278 conf.error_handler = optarg;
282 if (optarg[0] == '/') {
283 fprintf(stderr, "Error: Invalid index page: %s\n",
287 uh_index_add(optarg);
291 conf.no_symlinks = 1;
295 conf.no_dirlists = 1;
299 conf.rfc1918_filter = 1;
303 conf.max_script_requests = atoi(optarg);
307 conf.max_connections = atoi(optarg);
311 fixup_prefix(optarg);
312 conf.cgi_prefix = optarg;
316 optarg = strdup(optarg);
317 port = strchr(optarg, '=');
318 if (optarg[0] != '.' || !port) {
319 fprintf(stderr, "Error: Invalid interpreter: %s\n",
325 uh_interpreter_add(optarg, port);
329 conf.script_timeout = atoi(optarg);
333 conf.network_timeout = atoi(optarg);
337 conf.http_keepalive = atoi(optarg);
341 conf.tcp_keepalive = atoi(optarg);
349 optarg = strdup(optarg);
350 port = alloca(strlen(optarg) + 1);
354 /* "decode" plus to space to retain compat */
355 for (opt = 0; optarg[opt]; opt++)
356 if (optarg[opt] == '+')
359 /* opt now contains strlen(optarg) -- no need to re-scan */
360 if (uh_urldecode(port, opt, optarg, opt) < 0) {
361 fprintf(stderr, "uhttpd: invalid encoding\n");
369 /* basic auth realm */
376 printf("%s\n", crypt(optarg, "$1$"));
387 conf.lua_prefix = optarg;
391 conf.lua_handler = optarg;
396 fprintf(stderr, "uhttpd: Lua support not compiled, "
397 "ignoring -%c\n", ch);
402 conf.ubus_noauth = 1;
406 conf.ubus_prefix = optarg;
410 conf.ubus_socket = optarg;
421 fprintf(stderr, "uhttpd: UBUS support not compiled, "
422 "ignoring -%c\n", ch);
426 return usage(argv[0]);
433 if (!realpath(".", uh_buf)) {
434 fprintf(stderr, "Error: Unable to determine work dir\n");
437 conf.docroot = strdup(uh_buf);
440 init_defaults_post();
443 fprintf(stderr, "Error: No sockets bound, unable to continue\n");
449 if (!tls_crt || !tls_key) {
450 fprintf(stderr, "Please specify a certificate and "
451 "a key file to enable SSL support\n");
455 if (uh_tls_init(tls_key, tls_crt))
461 if (conf.lua_handler || conf.lua_prefix) {
462 if (!conf.lua_handler || !conf.lua_prefix) {
463 fprintf(stderr, "Need handler and prefix to enable Lua support\n");
466 if (uh_plugin_init("uhttpd_lua.so"))
471 if (conf.ubus_prefix && uh_plugin_init("uhttpd_ubus.so"))
475 /* fork (if not disabled) */
487 cur_fd = open("/dev/null", O_WRONLY);