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");
228 if (cl
->request
.method
== UH_HTTP_MSG_HEAD
)
232 static void proc_write_close(struct client
*cl
)
234 struct dispatch_proc
*p
= &cl
->dispatch
.proc
;
239 uloop_fd_delete(&p
->wrfd
);
244 static void proc_free(struct client
*cl
)
246 struct dispatch_proc
*p
= &cl
->dispatch
.proc
;
248 uloop_timeout_cancel(&p
->timeout
);
249 blob_buf_free(&p
->hdr
);
250 proc_write_close(cl
);
251 uh_relay_free(&p
->r
);
254 static void proc_write_cb(struct uloop_fd
*fd
, unsigned int events
)
256 struct client
*cl
= container_of(fd
, struct client
, dispatch
.proc
.wrfd
);
258 client_poll_post_data(cl
);
261 static void proc_relay_write_cb(struct client
*cl
)
263 struct dispatch_proc
*p
= &cl
->dispatch
.proc
;
265 if (ustream_pending_data(cl
->us
, true))
268 ustream_set_read_blocked(&p
->r
.sfd
.stream
, false);
269 p
->r
.sfd
.stream
.notify_read(&p
->r
.sfd
.stream
, 0);
272 static int proc_data_send(struct client
*cl
, const char *data
, int len
)
274 struct dispatch_proc
*p
= &cl
->dispatch
.proc
;
279 ret
= write(p
->wrfd
.fd
, data
, len
);
285 if (errno
== EAGAIN
|| errno
== EWOULDBLOCK
)
288 /* consume all data */
301 uloop_fd_add(&p
->wrfd
, ULOOP_WRITE
);
303 uloop_fd_delete(&p
->wrfd
);
308 static void proc_timeout_cb(struct uloop_timeout
*timeout
)
310 struct dispatch_proc
*proc
= container_of(timeout
, struct dispatch_proc
, timeout
);
311 struct client
*cl
= container_of(proc
, struct client
, dispatch
.proc
);
313 uh_relay_kill(cl
, &proc
->r
);
316 bool uh_create_process(struct client
*cl
, struct path_info
*pi
, char *url
,
317 void (*cb
)(struct client
*cl
, struct path_info
*pi
, char *url
))
319 struct dispatch
*d
= &cl
->dispatch
;
320 struct dispatch_proc
*proc
= &d
->proc
;
324 blob_buf_init(&proc
->hdr
, 0);
325 proc
->status_code
= 200;
326 proc
->status_msg
= "OK";
358 proc
->wrfd
.fd
= wfd
[1];
359 uh_relay_open(cl
, &proc
->r
, rfd
[0], pid
);
362 d
->close_fds
= proc_close_fds
;
363 d
->data_send
= proc_data_send
;
364 d
->data_done
= proc_write_close
;
365 d
->write_cb
= proc_relay_write_cb
;
366 proc
->r
.header_cb
= proc_handle_header
;
367 proc
->r
.header_end
= proc_handle_header_end
;
368 proc
->r
.close
= proc_handle_close
;
369 proc
->wrfd
.cb
= proc_write_cb
;
370 proc
->timeout
.cb
= proc_timeout_cb
;
371 if (conf
.script_timeout
> 0)
372 uloop_timeout_set(&proc
->timeout
, conf
.script_timeout
* 1000);