Commit | Line | Data |
---|---|---|
992ce9ef FT |
1 | /* |
2 | ashd - A Sane HTTP Daemon | |
3 | Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com> | |
4 | ||
5 | This program is free software: you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation, either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | #include <stdlib.h> | |
20 | #include <stdio.h> | |
21 | #include <string.h> | |
22 | #include <unistd.h> | |
23 | #include <errno.h> | |
24 | #include <sys/stat.h> | |
25 | #include <ctype.h> | |
26 | #include <dirent.h> | |
27 | #include <fnmatch.h> | |
28 | ||
29 | #ifdef HAVE_CONFIG_H | |
30 | #include <config.h> | |
31 | #endif | |
32 | #include <utils.h> | |
33 | #include <mt.h> | |
34 | #include <log.h> | |
35 | #include <req.h> | |
36 | #include <proc.h> | |
d422fdfd | 37 | #include <resp.h> |
06c1a718 | 38 | #include <cf.h> |
992ce9ef | 39 | |
992ce9ef FT |
40 | #define PAT_BASENAME 0 |
41 | #define PAT_PATHNAME 1 | |
42 | #define PAT_ALL 2 | |
43 | #define PAT_DEFAULT 3 | |
44 | ||
45 | struct config { | |
46 | struct config *next, *prev; | |
47 | char *path; | |
48 | time_t mtime; | |
49 | struct child *children; | |
50 | struct pattern *patterns; | |
51 | }; | |
52 | ||
992ce9ef FT |
53 | struct rule { |
54 | int type; | |
55 | char *pattern; | |
56 | }; | |
57 | ||
58 | struct pattern { | |
59 | struct pattern *next; | |
60 | char *childnm; | |
61 | struct rule **rules; | |
62 | }; | |
63 | ||
64 | struct config *cflist; | |
65 | ||
992ce9ef FT |
66 | static void freepattern(struct pattern *pat) |
67 | { | |
68 | struct rule **rule; | |
69 | ||
70 | for(rule = pat->rules; *rule; rule++) { | |
71 | if((*rule)->pattern != NULL) | |
72 | free((*rule)->pattern); | |
73 | free(*rule); | |
74 | } | |
75 | if(pat->childnm != NULL) | |
76 | free(pat->childnm); | |
77 | free(pat); | |
78 | } | |
79 | ||
80 | static void freeconfig(struct config *cf) | |
81 | { | |
82 | struct child *ch, *nch; | |
83 | struct pattern *pat, *npat; | |
84 | ||
85 | if(cf->prev != NULL) | |
86 | cf->prev->next = cf->next; | |
87 | if(cf->next != NULL) | |
88 | cf->next->prev = cf->prev; | |
89 | if(cf == cflist) | |
90 | cflist = cf->next; | |
91 | free(cf->path); | |
92 | for(ch = cf->children; ch != NULL; ch = nch) { | |
93 | nch = ch->next; | |
94 | freechild(ch); | |
95 | } | |
96 | for(pat = cf->patterns; pat != NULL; pat = npat) { | |
97 | npat = pat->next; | |
98 | freepattern(pat); | |
99 | } | |
100 | free(cf); | |
101 | } | |
102 | ||
992ce9ef FT |
103 | static struct child *getchild(struct config *cf, char *name) |
104 | { | |
105 | struct child *ch; | |
106 | ||
107 | for(ch = cf->children; ch; ch = ch->next) { | |
108 | if(!strcmp(ch->name, name)) | |
109 | break; | |
110 | } | |
111 | return(ch); | |
112 | } | |
113 | ||
114 | static struct rule *newrule(struct pattern *pat) | |
115 | { | |
116 | int i; | |
117 | struct rule *rule; | |
118 | ||
119 | for(i = 0; pat->rules[i]; i++); | |
120 | pat->rules = srealloc(pat->rules, sizeof(*pat->rules) * (i + 2)); | |
cceb3611 | 121 | rule = pat->rules[i] = szmalloc(sizeof(*rule)); |
992ce9ef FT |
122 | pat->rules[i + 1] = NULL; |
123 | return(rule); | |
124 | } | |
125 | ||
126 | static struct pattern *newpattern(void) | |
127 | { | |
128 | struct pattern *pat; | |
129 | ||
130 | omalloc(pat); | |
131 | pat->rules = szmalloc(sizeof(*pat->rules)); | |
132 | return(pat); | |
133 | } | |
134 | ||
06c1a718 FT |
135 | static struct pattern *parsepattern(struct cfstate *s) |
136 | { | |
137 | struct pattern *pat; | |
138 | struct rule *rule; | |
139 | int sl; | |
140 | ||
141 | if(!strcmp(s->argv[0], "match")) { | |
142 | s->expstart = 1; | |
143 | pat = newpattern(); | |
144 | } else { | |
145 | return(NULL); | |
146 | } | |
147 | ||
148 | sl = s->lno; | |
149 | while(1) { | |
150 | getcfline(s); | |
151 | if(!strcmp(s->argv[0], "filename")) { | |
152 | if(s->argc < 2) { | |
153 | flog(LOG_WARNING, "%s:%i: missing pattern for `filename' match", s->file, s->lno); | |
154 | continue; | |
155 | } | |
156 | rule = newrule(pat); | |
157 | rule->type = PAT_BASENAME; | |
158 | rule->pattern = sstrdup(s->argv[1]); | |
159 | } else if(!strcmp(s->argv[0], "pathname")) { | |
160 | if(s->argc < 2) { | |
161 | flog(LOG_WARNING, "%s:%i: missing pattern for `pathname' match", s->file, s->lno); | |
162 | continue; | |
163 | } | |
164 | rule = newrule(pat); | |
165 | rule->type = PAT_PATHNAME; | |
166 | rule->pattern = sstrdup(s->argv[1]); | |
167 | } else if(!strcmp(s->argv[0], "all")) { | |
168 | newrule(pat)->type = PAT_ALL; | |
169 | } else if(!strcmp(s->argv[0], "default")) { | |
170 | newrule(pat)->type = PAT_DEFAULT; | |
171 | } else if(!strcmp(s->argv[0], "handler")) { | |
172 | if(s->argc < 2) { | |
173 | flog(LOG_WARNING, "%s:%i: missing child name for `handler' directive", s->file, s->lno); | |
174 | continue; | |
175 | } | |
176 | if(pat->childnm != NULL) | |
177 | free(pat->childnm); | |
178 | pat->childnm = sstrdup(s->argv[1]); | |
179 | } else if(!strcmp(s->argv[0], "end") || !strcmp(s->argv[0], "eof")) { | |
180 | break; | |
181 | } else { | |
182 | flog(LOG_WARNING, "%s:%i: unknown directive `%s' in pattern declaration", s->file, s->lno, s->argv[0]); | |
183 | } | |
184 | } | |
185 | ||
186 | if(pat->rules[0] == NULL) { | |
187 | flog(LOG_WARNING, "%s:%i: missing rules in match declaration", s->file, sl); | |
188 | freepattern(pat); | |
189 | return(NULL); | |
190 | } | |
191 | if(pat->childnm == NULL) { | |
192 | flog(LOG_WARNING, "%s:%i: missing handler in match declaration", s->file, sl); | |
193 | freepattern(pat); | |
194 | return(NULL); | |
195 | } | |
196 | return(pat); | |
197 | } | |
198 | ||
992ce9ef FT |
199 | static struct config *readconfig(char *path) |
200 | { | |
06c1a718 FT |
201 | struct cfstate *s; |
202 | FILE *in; | |
992ce9ef | 203 | struct config *cf; |
992ce9ef FT |
204 | struct child *child; |
205 | struct pattern *pat; | |
992ce9ef | 206 | struct stat sb; |
06c1a718 | 207 | char *p; |
992ce9ef | 208 | |
cceb3611 FT |
209 | p = sprintf3("%s/.htrc", path); |
210 | if(stat(p, &sb)) | |
992ce9ef | 211 | return(NULL); |
06c1a718 FT |
212 | if((in = fopen(p, "r")) == NULL) { |
213 | flog(LOG_WARNING, "%s: %s", p, strerror(errno)); | |
992ce9ef | 214 | return(NULL); |
06c1a718 FT |
215 | } |
216 | s = mkcfparser(in, p); | |
992ce9ef FT |
217 | omalloc(cf); |
218 | cf->mtime = sb.st_mtime; | |
219 | cf->path = sstrdup(path); | |
06c1a718 FT |
220 | |
221 | while(1) { | |
222 | getcfline(s); | |
223 | if((child = parsechild(s)) != NULL) { | |
224 | child->next = cf->children; | |
225 | cf->children = child; | |
226 | } else if((pat = parsepattern(s)) != NULL) { | |
227 | pat->next = cf->patterns; | |
228 | cf->patterns = pat; | |
229 | } else if(!strcmp(s->argv[0], "eof")) { | |
230 | break; | |
231 | } else { | |
232 | flog(LOG_WARNING, "%s:%i: unknown directive `%s'", s->file, s->lno, s->argv[0]); | |
992ce9ef | 233 | } |
06c1a718 | 234 | } |
992ce9ef | 235 | |
06c1a718 FT |
236 | freecfparser(s); |
237 | fclose(in); | |
992ce9ef FT |
238 | return(cf); |
239 | } | |
240 | ||
241 | static struct config *getconfig(char *path) | |
242 | { | |
243 | struct config *cf; | |
244 | struct stat sb; | |
245 | ||
246 | for(cf = cflist; cf != NULL; cf = cf->next) { | |
247 | if(!strcmp(cf->path, path)) { | |
cceb3611 | 248 | if(stat(sprintf3("%s/.htrc", path), &sb)) |
992ce9ef FT |
249 | return(NULL); |
250 | if(sb.st_mtime != cf->mtime) { | |
251 | freeconfig(cf); | |
252 | break; | |
253 | } | |
254 | return(cf); | |
255 | } | |
256 | } | |
257 | if((cf = readconfig(path)) != NULL) { | |
258 | cf->next = cflist; | |
259 | cflist = cf; | |
260 | } | |
261 | return(cf); | |
262 | } | |
263 | ||
992ce9ef FT |
264 | static struct child *findchild(char *file, char *name) |
265 | { | |
266 | char *buf, *p; | |
267 | struct config *cf; | |
268 | struct child *ch; | |
269 | ||
270 | buf = sstrdup(file); | |
271 | while(1) { | |
272 | ch = NULL; | |
273 | if(!strcmp(buf, ".")) | |
274 | break; | |
275 | if((p = strrchr(buf, '/')) != NULL) | |
276 | *p = 0; | |
277 | else | |
278 | strcpy(buf, "."); | |
279 | cf = getconfig(buf); | |
280 | if(cf == NULL) | |
281 | continue; | |
282 | if((ch = getchild(cf, name)) != NULL) | |
283 | break; | |
284 | } | |
285 | free(buf); | |
286 | return(ch); | |
287 | } | |
288 | ||
289 | static struct pattern *findmatch(char *file, int trydefault) | |
290 | { | |
291 | int i; | |
292 | char *buf, *p, *bn; | |
293 | struct config *cf; | |
294 | struct pattern *pat; | |
295 | struct rule *rule; | |
296 | ||
297 | if((bn = strrchr(file, '/')) != NULL) | |
298 | bn++; | |
299 | else | |
300 | bn = file; | |
301 | buf = sstrdup(file); | |
302 | while(1) { | |
303 | pat = NULL; | |
304 | if(!strcmp(buf, ".")) | |
305 | break; | |
306 | if((p = strrchr(buf, '/')) != NULL) | |
307 | *p = 0; | |
308 | else | |
309 | strcpy(buf, "."); | |
310 | cf = getconfig(buf); | |
311 | if(cf == NULL) | |
312 | continue; | |
313 | for(pat = cf->patterns; pat != NULL; pat = pat->next) { | |
314 | for(i = 0; (rule = pat->rules[i]) != NULL; i++) { | |
315 | if(rule->type == PAT_BASENAME) { | |
316 | if(fnmatch(rule->pattern, bn, 0)) | |
317 | break; | |
318 | } else if(rule->type == PAT_PATHNAME) { | |
319 | if(fnmatch(rule->pattern, file, FNM_PATHNAME)) | |
320 | break; | |
321 | } else if(rule->type == PAT_ALL) { | |
322 | } else if(rule->type == PAT_DEFAULT) { | |
323 | if(!trydefault) | |
324 | break; | |
325 | } | |
326 | } | |
327 | if(!rule) | |
328 | goto out; | |
329 | } | |
330 | } | |
331 | ||
332 | out: | |
333 | free(buf); | |
334 | return(pat); | |
335 | } | |
336 | ||
54cefaba | 337 | static void handlefile(struct hthead *req, int fd, char *path) |
992ce9ef | 338 | { |
992ce9ef FT |
339 | struct pattern *pat; |
340 | struct child *ch; | |
54cefaba FT |
341 | |
342 | headappheader(req, "X-Ash-File", path); | |
343 | if(((pat = findmatch(path, 0)) == NULL) && ((pat = findmatch(path, 1)) == NULL)) { | |
992ce9ef | 344 | /* XXX: Send a 500 error? 404? */ |
992ce9ef FT |
345 | return; |
346 | } | |
54cefaba | 347 | if((ch = findchild(path, pat->childnm)) == NULL) { |
992ce9ef | 348 | flog(LOG_ERR, "child %s requested, but was not declared", pat->childnm); |
d422fdfd | 349 | simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", pat->childnm); |
992ce9ef FT |
350 | return; |
351 | } | |
352 | ||
d1b065b5 FT |
353 | if(childhandle(ch, req, fd)) |
354 | simpleerror(fd, 500, "Server Error", "The request handler crashed."); | |
54cefaba FT |
355 | } |
356 | ||
357 | static void handledir(struct hthead *req, int fd, char *path) | |
358 | { | |
d422fdfd | 359 | /* XXX: Todo */ |
06c1a718 | 360 | simpleerror(fd, 403, "Not Authorized", "Will not send directory listings or indices yet."); |
54cefaba FT |
361 | } |
362 | ||
363 | static int checkdir(struct hthead *req, int fd, char *path) | |
364 | { | |
365 | return(0); | |
366 | } | |
367 | ||
368 | static void serve(struct hthead *req, int fd) | |
369 | { | |
370 | char *p, *p2, *path, *tmp, *buf, *p3, *nm; | |
371 | struct stat sb; | |
372 | DIR *dir; | |
373 | struct dirent *dent; | |
992ce9ef | 374 | |
54cefaba FT |
375 | nm = req->rest; |
376 | path = sstrdup("."); | |
377 | p = nm; | |
378 | while(1) { | |
379 | if((p2 = strchr(p, '/')) == NULL) { | |
380 | } else { | |
381 | *(p2++) = 0; | |
382 | } | |
383 | ||
384 | if(!*p) { | |
385 | if(p2 == NULL) { | |
386 | if(stat(path, &sb)) { | |
387 | flog(LOG_WARNING, "failed to stat previously stated directory %s: %s", path, strerror(errno)); | |
d422fdfd | 388 | simpleerror(fd, 500, "Internal Server Error", "The server encountered an unexpected condition."); |
54cefaba FT |
389 | goto fail; |
390 | } | |
391 | break; | |
392 | } else { | |
d422fdfd | 393 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
394 | goto fail; |
395 | } | |
396 | } | |
d422fdfd FT |
397 | if(*p == '.') { |
398 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); | |
54cefaba | 399 | goto fail; |
d422fdfd | 400 | } |
54cefaba FT |
401 | |
402 | getconfig(path); | |
403 | ||
404 | /* | |
405 | * First, check the name verbatimely: | |
406 | */ | |
407 | buf = sprintf3("%s/%s", path, p); | |
408 | if(!stat(buf, &sb)) { | |
409 | if(S_ISDIR(sb.st_mode)) { | |
410 | tmp = path; | |
411 | if(!strcmp(path, ".")) | |
412 | path = sstrdup(p); | |
413 | else | |
414 | path = sprintf2("%s/%s", path, p); | |
415 | free(tmp); | |
416 | if(checkdir(req, fd, path)) | |
417 | break; | |
418 | goto next; | |
419 | } | |
420 | if(S_ISREG(sb.st_mode)) { | |
421 | tmp = path; | |
422 | path = sprintf2("%s/%s", path, p); | |
423 | free(tmp); | |
424 | break; | |
425 | } | |
d422fdfd | 426 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
427 | goto fail; |
428 | } | |
429 | ||
430 | /* | |
431 | * Check the file extensionlessly: | |
432 | */ | |
433 | if(!strchr(p, '.') && ((dir = opendir(path)) != NULL)) { | |
434 | while((dent = readdir(dir)) != NULL) { | |
435 | buf = sprintf3("%s/%s", path, dent->d_name); | |
436 | if((p3 = strchr(dent->d_name, '.')) != NULL) | |
437 | *p3 = 0; | |
438 | if(strcmp(dent->d_name, p)) | |
439 | continue; | |
440 | if(stat(buf, &sb)) | |
441 | continue; | |
442 | if(!S_ISREG(sb.st_mode)) | |
443 | continue; | |
444 | tmp = path; | |
445 | path = sstrdup(buf); | |
446 | free(tmp); | |
447 | break; | |
448 | } | |
449 | closedir(dir); | |
450 | if(dent != NULL) | |
451 | break; | |
452 | } | |
453 | ||
d422fdfd | 454 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
455 | goto fail; |
456 | ||
457 | next: | |
458 | if(p2 == NULL) | |
459 | break; | |
460 | p = p2; | |
461 | } | |
462 | if(p2 == NULL) | |
463 | replrest(req, ""); | |
464 | else | |
465 | replrest(req, p2); | |
466 | if(!strncmp(path, "./", 2)) | |
467 | memmove(path, path + 2, strlen(path + 2) + 1); | |
468 | if(S_ISDIR(sb.st_mode)) { | |
469 | handledir(req, fd, path); | |
470 | } else if(S_ISREG(sb.st_mode)) { | |
471 | handlefile(req, fd, path); | |
472 | } else { | |
d422fdfd | 473 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
474 | goto fail; |
475 | } | |
476 | goto out; | |
477 | ||
478 | fail: | |
d422fdfd | 479 | /* No special handling, for now at least. */ |
54cefaba FT |
480 | out: |
481 | free(path); | |
992ce9ef FT |
482 | } |
483 | ||
484 | int main(int argc, char **argv) | |
485 | { | |
486 | struct hthead *req; | |
487 | int fd; | |
488 | ||
489 | if(argc < 2) { | |
490 | flog(LOG_ERR, "usage: dirplex DIR"); | |
491 | exit(1); | |
492 | } | |
493 | if(chdir(argv[1])) { | |
494 | flog(LOG_ERR, "could not change directory to %s: %s", argv[1], strerror(errno)); | |
495 | exit(1); | |
496 | } | |
497 | signal(SIGCHLD, SIG_IGN); | |
498 | while(1) { | |
499 | if((fd = recvreq(0, &req)) < 0) { | |
500 | if(errno != 0) | |
501 | flog(LOG_ERR, "recvreq: %s", strerror(errno)); | |
502 | break; | |
503 | } | |
504 | serve(req, fd); | |
505 | freehthead(req); | |
506 | close(fd); | |
507 | } | |
508 | return(0); | |
509 | } |