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.
20 #include <arpa/inet.h>
21 #include <libubox/blobmsg.h>
26 __header(accept_charset) \
27 __header(accept_encoding) \
28 __header(accept_language) \
29 __header(authorization) \
30 __header(connection) \
34 __header(user_agent) \
35 __header(content_type) \
36 __header(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 inet_ntop(cl
->peer_addr
.family
, &cl
->peer_addr
.in
, remote_addr
, sizeof(remote_addr
));
152 blobmsg_parse(hdr_policy
, __HDR_MAX
, tb
, blob_data(data
), blob_len(data
));
153 for (i
= 0; i
< ARRAY_SIZE(proc_header_env
); i
++) {
154 struct blob_attr
*cur
;
156 cur
= tb
[proc_header_env
[i
].idx
];
157 vars
[i
].name
= proc_header_env
[i
].name
;
158 vars
[i
].value
= cur
? blobmsg_data(cur
) : "";
161 memcpy(&vars
[i
], extra_vars
, sizeof(extra_vars
));
162 i
+= ARRAY_SIZE(extra_vars
);
164 vars
[i
].value
= NULL
;
169 static void proc_close_fds(struct client
*cl
)
171 close(cl
->dispatch
.proc
.r
.sfd
.fd
.fd
);
174 static void proc_handle_close(struct relay
*r
, int ret
)
177 uh_client_error(r
->cl
, 502, "Bad Gateway",
178 "The process did not produce any response");
182 uh_request_done(r
->cl
);
185 static void proc_handle_header(struct relay
*r
, const char *name
, const char *val
)
187 static char status_buf
[64];
188 struct client
*cl
= r
->cl
;
192 if (!strcmp(name
, "Status")) {
193 sep
= strchr(val
, ' ');
199 snprintf(status_buf
, sizeof(status_buf
), "%s", sep
+ 1);
200 cl
->dispatch
.proc
.status_msg
= status_buf
;
201 cl
->dispatch
.proc
.status_code
= atoi(buf
);
205 blobmsg_add_string(&cl
->dispatch
.proc
.hdr
, name
, val
);
208 static void proc_handle_header_end(struct relay
*r
)
210 struct client
*cl
= r
->cl
;
211 struct blob_attr
*cur
;
214 uh_http_header(cl
, cl
->dispatch
.proc
.status_code
, cl
->dispatch
.proc
.status_msg
);
215 blob_for_each_attr(cur
, cl
->dispatch
.proc
.hdr
.head
, rem
)
216 ustream_printf(cl
->us
, "%s: %s\r\n", blobmsg_name(cur
), blobmsg_data(cur
));
218 ustream_printf(cl
->us
, "\r\n");
221 static void proc_write_close(struct client
*cl
)
223 struct dispatch_proc
*p
= &cl
->dispatch
.proc
;
228 uloop_fd_delete(&p
->wrfd
);
233 static void proc_free(struct client
*cl
)
235 struct dispatch_proc
*p
= &cl
->dispatch
.proc
;
236 blob_buf_free(&p
->hdr
);
237 proc_write_close(cl
);
238 uh_relay_free(&p
->r
);
241 static void proc_write_cb(struct uloop_fd
*fd
, unsigned int events
)
243 struct client
*cl
= container_of(fd
, struct client
, dispatch
.proc
.wrfd
);
245 client_poll_post_data(cl
);
248 static int proc_data_send(struct client
*cl
, const char *data
, int len
)
250 struct dispatch_proc
*p
= &cl
->dispatch
.proc
;
255 ret
= write(p
->wrfd
.fd
, data
, len
);
261 if (errno
== EAGAIN
|| errno
== EWOULDBLOCK
)
264 /* error, no retry */
278 uloop_fd_add(&p
->wrfd
, ULOOP_WRITE
);
280 uloop_fd_delete(&p
->wrfd
);
285 bool uh_create_process(struct client
*cl
, struct path_info
*pi
,
286 void (*cb
)(struct client
*cl
, struct path_info
*pi
))
288 struct dispatch
*d
= &cl
->dispatch
;
289 struct dispatch_proc
*proc
= &d
->proc
;
293 blob_buf_init(&proc
->hdr
, 0);
294 proc
->status_code
= 200;
295 proc
->status_msg
= "OK";
327 proc
->wrfd
.fd
= wfd
[1];
328 uh_relay_open(cl
, &proc
->r
, rfd
[0], pid
);
331 d
->close_fds
= proc_close_fds
;
332 d
->data_send
= proc_data_send
;
333 d
->data_done
= proc_write_close
;
334 proc
->r
.header_cb
= proc_handle_header
;
335 proc
->r
.header_end
= proc_handle_header_end
;
336 proc
->r
.close
= proc_handle_close
;
337 proc
->wrfd
.cb
= proc_write_cb
;