2 * uhttpd - Tiny single-threaded httpd - Static file handler
4 * Copyright (C) 2010-2012 Jo-Philipp Wich <xm@subsignal.org>
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
19 #define _XOPEN_SOURCE 500 /* strptime() */
20 #define _BSD_SOURCE /* scandir(), timegm() */
23 #include "uhttpd-utils.h"
24 #include "uhttpd-file.h"
26 #include "uhttpd-mimetypes.h"
29 static const char * uh_file_mime_lookup(const char *path
)
31 struct mimetype
*m
= &uh_mime_types
[0];
36 e
= &path
[strlen(path
)-1];
40 if ((*e
== '.' || *e
== '/') && !strcasecmp(&e
[1], m
->extn
))
49 return "application/octet-stream";
52 static const char * uh_file_mktag(struct stat
*s
)
56 snprintf(tag
, sizeof(tag
), "\"%x-%x-%x\"",
57 (unsigned int) s
->st_ino
,
58 (unsigned int) s
->st_size
,
59 (unsigned int) s
->st_mtime
);
64 static time_t uh_file_date2unix(const char *date
)
68 memset(&t
, 0, sizeof(t
));
70 if (strptime(date
, "%a, %d %b %Y %H:%M:%S %Z", &t
) != NULL
)
76 static char * uh_file_unix2date(time_t ts
)
79 struct tm
*t
= gmtime(&ts
);
81 strftime(str
, sizeof(str
), "%a, %d %b %Y %H:%M:%S GMT", t
);
86 static char * uh_file_header_lookup(struct client
*cl
, const char *name
)
90 foreach_header(i
, cl
->request
.headers
)
92 if (!strcasecmp(cl
->request
.headers
[i
], name
))
93 return cl
->request
.headers
[i
+1];
100 static int uh_file_response_ok_hdrs(struct client
*cl
, struct stat
*s
)
102 ensure_ret(uh_http_sendf(cl
, NULL
, "Connection: close\r\n"));
106 ensure_ret(uh_http_sendf(cl
, NULL
, "ETag: %s\r\n", uh_file_mktag(s
)));
107 ensure_ret(uh_http_sendf(cl
, NULL
, "Last-Modified: %s\r\n",
108 uh_file_unix2date(s
->st_mtime
)));
111 return uh_http_sendf(cl
, NULL
, "Date: %s\r\n", uh_file_unix2date(time(NULL
)));
114 static int uh_file_response_200(struct client
*cl
, struct stat
*s
)
116 ensure_ret(uh_http_sendf(cl
, NULL
, "%s 200 OK\r\n",
117 http_versions
[cl
->request
.version
]));
119 return uh_file_response_ok_hdrs(cl
, s
);
122 static int uh_file_response_304(struct client
*cl
, struct stat
*s
)
124 ensure_ret(uh_http_sendf(cl
, NULL
, "%s 304 Not Modified\r\n",
125 http_versions
[cl
->request
.version
]));
127 return uh_file_response_ok_hdrs(cl
, s
);
130 static int uh_file_response_412(struct client
*cl
)
132 return uh_http_sendf(cl
, NULL
,
133 "%s 412 Precondition Failed\r\n"
134 "Connection: close\r\n",
135 http_versions
[cl
->request
.version
]);
138 static int uh_file_if_match(struct client
*cl
, struct stat
*s
, int *ok
)
140 const char *tag
= uh_file_mktag(s
);
141 char *hdr
= uh_file_header_lookup(cl
, "If-Match");
149 for (i
= 0; i
< strlen(hdr
); i
++)
151 if ((hdr
[i
] == ' ') || (hdr
[i
] == ','))
156 else if (!strcmp(p
, "*") || !strcmp(p
, tag
))
164 ensure_ret(uh_file_response_412(cl
));
172 static int uh_file_if_modified_since(struct client
*cl
, struct stat
*s
, int *ok
)
174 char *hdr
= uh_file_header_lookup(cl
, "If-Modified-Since");
179 if (uh_file_date2unix(hdr
) >= s
->st_mtime
)
182 ensure_ret(uh_file_response_304(cl
, s
));
189 static int uh_file_if_none_match(struct client
*cl
, struct stat
*s
, int *ok
)
191 const char *tag
= uh_file_mktag(s
);
192 char *hdr
= uh_file_header_lookup(cl
, "If-None-Match");
201 for (i
= 0; i
< strlen(hdr
); i
++)
203 if ((hdr
[i
] == ' ') || (hdr
[i
] == ','))
208 else if (!strcmp(p
, "*") || !strcmp(p
, tag
))
212 if ((cl
->request
.method
== UH_HTTP_MSG_GET
) ||
213 (cl
->request
.method
== UH_HTTP_MSG_HEAD
))
215 ensure_ret(uh_file_response_304(cl
, s
));
219 ensure_ret(uh_file_response_412(cl
));
230 static int uh_file_if_range(struct client
*cl
, struct stat
*s
, int *ok
)
232 char *hdr
= uh_file_header_lookup(cl
, "If-Range");
238 ensure_ret(uh_file_response_412(cl
));
244 static int uh_file_if_unmodified_since(struct client
*cl
, struct stat
*s
,
247 char *hdr
= uh_file_header_lookup(cl
, "If-Unmodified-Since");
252 if (uh_file_date2unix(hdr
) <= s
->st_mtime
)
255 ensure_ret(uh_file_response_412(cl
));
263 static int uh_file_scandir_filter_dir(const struct dirent
*e
)
265 return strcmp(e
->d_name
, ".") ? 1 : 0;
268 static void uh_file_dirlist(struct client
*cl
, struct path_info
*pi
)
272 char filename
[PATH_MAX
];
274 struct dirent
**files
= NULL
;
277 ensure_out(uh_http_sendf(cl
, &cl
->request
,
278 "<html><head><title>Index of %s</title></head>"
279 "<body><h1>Index of %s</h1><hr /><ol>",
280 pi
->name
, pi
->name
));
282 if ((count
= scandir(pi
->phys
, &files
, uh_file_scandir_filter_dir
,
285 memset(filename
, 0, sizeof(filename
));
286 memcpy(filename
, pi
->phys
, sizeof(filename
));
287 pathptr
= &filename
[strlen(filename
)];
290 for (i
= 0; i
< count
; i
++)
292 strncat(filename
, files
[i
]->d_name
,
293 sizeof(filename
) - strlen(files
[i
]->d_name
));
295 if (!stat(filename
, &s
) &&
296 (s
.st_mode
& S_IFDIR
) && (s
.st_mode
& S_IXOTH
))
298 ensure_out(uh_http_sendf(cl
, &cl
->request
,
299 "<li><strong><a href='%s%s'>%s</a>/"
300 "</strong><br /><small>modified: %s"
301 "<br />directory - %.02f kbyte<br />"
302 "<br /></small></li>",
303 pi
->name
, files
[i
]->d_name
,
305 uh_file_unix2date(s
.st_mtime
),
306 s
.st_size
/ 1024.0));
313 for (i
= 0; i
< count
; i
++)
315 strncat(filename
, files
[i
]->d_name
,
316 sizeof(filename
) - strlen(files
[i
]->d_name
));
318 if (!stat(filename
, &s
) &&
319 !(s
.st_mode
& S_IFDIR
) && (s
.st_mode
& S_IROTH
))
321 ensure_out(uh_http_sendf(cl
, &cl
->request
,
322 "<li><strong><a href='%s%s'>%s</a>"
323 "</strong><br /><small>modified: %s"
324 "<br />%s - %.02f kbyte<br />"
325 "<br /></small></li>",
326 pi
->name
, files
[i
]->d_name
,
328 uh_file_unix2date(s
.st_mtime
),
329 uh_file_mime_lookup(filename
),
330 s
.st_size
/ 1024.0));
337 ensure_out(uh_http_sendf(cl
, &cl
->request
, "</ol><hr /></body></html>"));
338 ensure_out(uh_http_sendf(cl
, &cl
->request
, ""));
343 for (i
= 0; i
< count
; i
++)
351 bool uh_file_request(struct client
*cl
, struct path_info
*pi
)
356 char buf
[UH_LIMIT_MSGHEAD
];
359 if ((pi
->stat
.st_mode
& S_IFREG
) && ((fd
= open(pi
->phys
, O_RDONLY
)) > 0))
361 /* test preconditions */
362 if (ok
) ensure_out(uh_file_if_modified_since(cl
, &pi
->stat
, &ok
));
363 if (ok
) ensure_out(uh_file_if_match(cl
, &pi
->stat
, &ok
));
364 if (ok
) ensure_out(uh_file_if_range(cl
, &pi
->stat
, &ok
));
365 if (ok
) ensure_out(uh_file_if_unmodified_since(cl
, &pi
->stat
, &ok
));
366 if (ok
) ensure_out(uh_file_if_none_match(cl
, &pi
->stat
, &ok
));
371 ensure_out(uh_file_response_200(cl
, &pi
->stat
));
373 ensure_out(uh_http_sendf(cl
, NULL
, "Content-Type: %s\r\n",
374 uh_file_mime_lookup(pi
->name
)));
376 ensure_out(uh_http_sendf(cl
, NULL
, "Content-Length: %i\r\n",
379 /* if request was HTTP 1.1 we'll respond chunked */
380 if ((cl
->request
.version
> 1.0) &&
381 (cl
->request
.method
!= UH_HTTP_MSG_HEAD
))
383 ensure_out(uh_http_send(cl
, NULL
,
384 "Transfer-Encoding: chunked\r\n", -1));
388 ensure_out(uh_http_send(cl
, NULL
, "\r\n", -1));
391 if (cl
->request
.method
!= UH_HTTP_MSG_HEAD
)
394 while ((rlen
= read(fd
, buf
, sizeof(buf
))) > 0)
395 ensure_out(uh_http_send(cl
, &cl
->request
, buf
, rlen
));
397 /* send trailer in chunked mode */
398 ensure_out(uh_http_send(cl
, &cl
->request
, "", 0));
402 /* one of the preconditions failed, terminate opened header and exit */
405 ensure_out(uh_http_send(cl
, NULL
, "\r\n", -1));
410 else if ((pi
->stat
.st_mode
& S_IFDIR
) && !cl
->server
->conf
->no_dirlists
)
413 ensure_out(uh_file_response_200(cl
, NULL
));
415 if (cl
->request
.version
> 1.0)
416 ensure_out(uh_http_send(cl
, NULL
,
417 "Transfer-Encoding: chunked\r\n", -1));
419 ensure_out(uh_http_send(cl
, NULL
,
420 "Content-Type: text/html\r\n\r\n", -1));
423 uh_file_dirlist(cl
, pi
);
429 ensure_out(uh_http_sendhf(cl
, 403, "Forbidden",
430 "Access to this resource is forbidden"));