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.
20 #include <arpa/inet.h>
21 #include <libubox/blobmsg.h>
25 __header(accept, accept) \
26 __header(accept_charset, accept-charset) \
27 __header(accept_encoding, accept-encoding) \
28 __header(accept_language, accept-language) \
29 __header(authorization, authorization) \
30 __header(connection, connection) \
31 __header(cookie, cookie) \
32 __header(host, host) \
33 __header(referer, referer) \
34 __header(user_agent, user-agent) \
35 __header(content_type, content-type) \
36 __header(content_length, content-length)
39 #define __header __enum_header
46 #define __header __blobmsg_header
47 static const struct blobmsg_policy hdr_policy[__HDR_MAX] = {
54 } proc_header_env[] = {
55 { "HTTP_ACCEPT", HDR_accept },
56 { "HTTP_ACCEPT_CHARSET", HDR_accept_charset },
57 { "HTTP_ACCEPT_ENCODING", HDR_accept_encoding },
58 { "HTTP_ACCEPT_LANGUAGE", HDR_accept_language },
59 { "HTTP_AUTHORIZATION", HDR_authorization },
60 { "HTTP_CONNECTION", HDR_connection },
61 { "HTTP_COOKIE", HDR_cookie },
62 { "HTTP_HOST", HDR_host },
63 { "HTTP_REFERER", HDR_referer },
64 { "HTTP_USER_AGENT", HDR_user_agent },
65 { "CONTENT_TYPE", HDR_content_type },
66 { "CONTENT_LENGTH", HDR_content_length },
70 /* no update needed */
74 /* updated by uh_get_process_vars */
95 static char local_addr[INET6_ADDRSTRLEN], remote_addr[INET6_ADDRSTRLEN];
96 static char local_port[6], remote_port[6];
97 static char redirect_status[4];
99 static struct env_var extra_vars[] = {
100 [_VAR_GW] = { "GATEWAY_INTERFACE", "CGI/1.1" },
101 [_VAR_SOFTWARE] = { "SERVER_SOFTWARE", "uhttpd" },
102 [VAR_SCRIPT_NAME] = { "SCRIPT_NAME" },
103 [VAR_SCRIPT_FILE] = { "SCRIPT_FILENAME" },
104 [VAR_DOCROOT] = { "DOCUMENT_ROOT" },
105 [VAR_QUERY] = { "QUERY_STRING" },
106 [VAR_REQUEST] = { "REQUEST_URI" },
107 [VAR_PROTO] = { "SERVER_PROTOCOL" },
108 [VAR_METHOD] = { "REQUEST_METHOD" },
109 [VAR_PATH_INFO] = { "PATH_INFO" },
110 [VAR_USER] = { "REMOTE_USER" },
111 [VAR_REDIRECT] = { "REDIRECT_STATUS", redirect_status },
112 [VAR_SERVER_NAME] = { "SERVER_NAME", local_addr },
113 [VAR_SERVER_ADDR] = { "SERVER_ADDR", local_addr },
114 [VAR_SERVER_PORT] = { "SERVER_PORT", local_port },
115 [VAR_REMOTE_NAME] = { "REMOTE_HOST", remote_addr },
116 [VAR_REMOTE_ADDR] = { "REMOTE_ADDR", remote_addr },
117 [VAR_REMOTE_PORT] = { "REMOTE_PORT", remote_port },
120 struct env_var *uh_get_process_vars(struct client *cl, struct path_info *pi)
122 struct http_request *req = &cl->request;
123 struct blob_attr *data = cl->hdr.head;
124 struct env_var *vars = (void *) uh_buf;
125 struct blob_attr *tb[__HDR_MAX];
130 url = blobmsg_data(blob_data(cl->hdr.head));
131 len = ARRAY_SIZE(proc_header_env);
132 len += ARRAY_SIZE(extra_vars);
133 len *= sizeof(struct env_var);
135 BUILD_BUG_ON(sizeof(uh_buf) < len);
137 extra_vars[VAR_SCRIPT_NAME].value = pi->name;
138 extra_vars[VAR_SCRIPT_FILE].value = pi->phys;
139 extra_vars[VAR_DOCROOT].value = pi->root;
140 extra_vars[VAR_QUERY].value = pi->query ? pi->query : "";
141 extra_vars[VAR_REQUEST].value = url;
142 extra_vars[VAR_PROTO].value = http_versions[req->version];
143 extra_vars[VAR_METHOD].value = http_methods[req->method];
144 extra_vars[VAR_PATH_INFO].value = pi->info;
145 extra_vars[VAR_USER].value = req->realm ? req->realm->user : NULL;
147 snprintf(redirect_status, sizeof(redirect_status),
148 "%d", req->redirect_status);
149 inet_ntop(cl->srv_addr.family, &cl->srv_addr.in, local_addr, sizeof(local_addr));
150 snprintf(local_port, sizeof(local_port), "%d", cl->srv_addr.port);
151 inet_ntop(cl->peer_addr.family, &cl->peer_addr.in, remote_addr, sizeof(remote_addr));
152 snprintf(remote_port, sizeof(remote_port), "%d", cl->peer_addr.port);
154 blobmsg_parse(hdr_policy, __HDR_MAX, tb, blob_data(data), blob_len(data));
155 for (i = 0; i < ARRAY_SIZE(proc_header_env); i++) {
156 struct blob_attr *cur;
158 cur = tb[proc_header_env[i].idx];
159 vars[i].name = proc_header_env[i].name;
160 vars[i].value = cur ? blobmsg_data(cur) : "";
163 memcpy(&vars[i], extra_vars, sizeof(extra_vars));
164 i += ARRAY_SIZE(extra_vars);
166 vars[i].value = NULL;
171 static void proc_close_fds(struct client *cl)
173 struct dispatch_proc *p = &cl->dispatch.proc;
175 close(p->r.sfd.fd.fd);
180 static void proc_handle_close(struct relay *r, int ret)
183 uh_client_error(r->cl, 502, "Bad Gateway",
184 "The process did not produce any response");
188 uh_request_done(r->cl);
191 static void proc_handle_header(struct relay *r, const char *name, const char *val)
193 static char status_buf[64];
194 struct client *cl = r->cl;
198 if (!strcmp(name, "Status")) {
199 sep = strchr(val, ' ');
205 snprintf(status_buf, sizeof(status_buf), "%s", sep + 1);
206 cl->dispatch.proc.status_msg = status_buf;
207 cl->dispatch.proc.status_code = atoi(buf);
211 blobmsg_add_string(&cl->dispatch.proc.hdr, name, val);
214 static void proc_handle_header_end(struct relay *r)
216 struct client *cl = r->cl;
217 struct dispatch_proc *p = &cl->dispatch.proc;
218 struct blob_attr *cur;
221 uloop_timeout_cancel(&p->timeout);
222 uh_http_header(cl, cl->dispatch.proc.status_code, cl->dispatch.proc.status_msg);
223 blob_for_each_attr(cur, cl->dispatch.proc.hdr.head, rem)
224 ustream_printf(cl->us, "%s: %s\r\n", blobmsg_name(cur), blobmsg_data(cur));
226 ustream_printf(cl->us, "\r\n");
229 static void proc_write_close(struct client *cl)
231 struct dispatch_proc *p = &cl->dispatch.proc;
236 uloop_fd_delete(&p->wrfd);
241 static void proc_free(struct client *cl)
243 struct dispatch_proc *p = &cl->dispatch.proc;
245 uloop_timeout_cancel(&p->timeout);
246 blob_buf_free(&p->hdr);
247 proc_write_close(cl);
248 uh_relay_free(&p->r);
251 static void proc_write_cb(struct uloop_fd *fd, unsigned int events)
253 struct client *cl = container_of(fd, struct client, dispatch.proc.wrfd);
255 client_poll_post_data(cl);
258 static void proc_relay_write_cb(struct client *cl)
260 struct dispatch_proc *p = &cl->dispatch.proc;
262 if (ustream_pending_data(cl->us, true))
265 ustream_set_read_blocked(&p->r.sfd.stream, false);
266 p->r.sfd.stream.notify_read(&p->r.sfd.stream, 0);
269 static int proc_data_send(struct client *cl, const char *data, int len)
271 struct dispatch_proc *p = &cl->dispatch.proc;
276 ret = write(p->wrfd.fd, data, len);
282 if (errno == EAGAIN || errno == EWOULDBLOCK)
285 /* error, no retry */
299 uloop_fd_add(&p->wrfd, ULOOP_WRITE);
301 uloop_fd_delete(&p->wrfd);
306 static void proc_timeout_cb(struct uloop_timeout *timeout)
308 struct dispatch_proc *proc = container_of(timeout, struct dispatch_proc, timeout);
309 struct client *cl = container_of(proc, struct client, dispatch.proc);
311 uh_relay_kill(cl, &proc->r);
314 bool uh_create_process(struct client *cl, struct path_info *pi, char *url,
315 void (*cb)(struct client *cl, struct path_info *pi, char *url))
317 struct dispatch *d = &cl->dispatch;
318 struct dispatch_proc *proc = &d->proc;
322 blob_buf_init(&proc->hdr, 0);
323 proc->status_code = 200;
324 proc->status_msg = "OK";
356 proc->wrfd.fd = wfd[1];
357 uh_relay_open(cl, &proc->r, rfd[0], pid);
360 d->close_fds = proc_close_fds;
361 d->data_send = proc_data_send;
362 d->data_done = proc_write_close;
363 d->write_cb = proc_relay_write_cb;
364 proc->r.header_cb = proc_handle_header;
365 proc->r.header_end = proc_handle_header_end;
366 proc->r.close = proc_handle_close;
367 proc->wrfd.cb = proc_write_cb;
368 proc->timeout.cb = proc_timeout_cb;
369 if (conf.script_timeout > 0)
370 uloop_timeout_set(&proc->timeout, conf.script_timeout * 1000);