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> | |
17e55136 | 28 | #include <time.h> |
992ce9ef FT |
29 | |
30 | #ifdef HAVE_CONFIG_H | |
31 | #include <config.h> | |
32 | #endif | |
33 | #include <utils.h> | |
34 | #include <mt.h> | |
35 | #include <log.h> | |
36 | #include <req.h> | |
37 | #include <proc.h> | |
d422fdfd | 38 | #include <resp.h> |
06c1a718 | 39 | #include <cf.h> |
992ce9ef | 40 | |
992ce9ef FT |
41 | #define PAT_BASENAME 0 |
42 | #define PAT_PATHNAME 1 | |
43 | #define PAT_ALL 2 | |
44 | #define PAT_DEFAULT 3 | |
45 | ||
46 | struct config { | |
47 | struct config *next, *prev; | |
48 | char *path; | |
17e55136 | 49 | time_t mtime, lastck; |
992ce9ef FT |
50 | struct child *children; |
51 | struct pattern *patterns; | |
52 | }; | |
53 | ||
992ce9ef FT |
54 | struct rule { |
55 | int type; | |
56 | char *pattern; | |
57 | }; | |
58 | ||
59 | struct pattern { | |
60 | struct pattern *next; | |
61 | char *childnm; | |
62 | struct rule **rules; | |
63 | }; | |
64 | ||
0fc6fd13 FT |
65 | static struct config *cflist; |
66 | static struct config *gconfig, *lconfig; | |
17e55136 | 67 | static time_t now; |
992ce9ef | 68 | |
992ce9ef FT |
69 | static void freepattern(struct pattern *pat) |
70 | { | |
71 | struct rule **rule; | |
72 | ||
73 | for(rule = pat->rules; *rule; rule++) { | |
74 | if((*rule)->pattern != NULL) | |
75 | free((*rule)->pattern); | |
76 | free(*rule); | |
77 | } | |
78 | if(pat->childnm != NULL) | |
79 | free(pat->childnm); | |
80 | free(pat); | |
81 | } | |
82 | ||
83 | static void freeconfig(struct config *cf) | |
84 | { | |
85 | struct child *ch, *nch; | |
86 | struct pattern *pat, *npat; | |
87 | ||
88 | if(cf->prev != NULL) | |
89 | cf->prev->next = cf->next; | |
90 | if(cf->next != NULL) | |
91 | cf->next->prev = cf->prev; | |
92 | if(cf == cflist) | |
93 | cflist = cf->next; | |
0fc6fd13 FT |
94 | if(cf->path != NULL) |
95 | free(cf->path); | |
992ce9ef FT |
96 | for(ch = cf->children; ch != NULL; ch = nch) { |
97 | nch = ch->next; | |
98 | freechild(ch); | |
99 | } | |
100 | for(pat = cf->patterns; pat != NULL; pat = npat) { | |
101 | npat = pat->next; | |
102 | freepattern(pat); | |
103 | } | |
104 | free(cf); | |
105 | } | |
106 | ||
992ce9ef FT |
107 | static struct child *getchild(struct config *cf, char *name) |
108 | { | |
109 | struct child *ch; | |
110 | ||
111 | for(ch = cf->children; ch; ch = ch->next) { | |
112 | if(!strcmp(ch->name, name)) | |
113 | break; | |
114 | } | |
115 | return(ch); | |
116 | } | |
117 | ||
118 | static struct rule *newrule(struct pattern *pat) | |
119 | { | |
120 | int i; | |
121 | struct rule *rule; | |
122 | ||
123 | for(i = 0; pat->rules[i]; i++); | |
124 | pat->rules = srealloc(pat->rules, sizeof(*pat->rules) * (i + 2)); | |
cceb3611 | 125 | rule = pat->rules[i] = szmalloc(sizeof(*rule)); |
992ce9ef FT |
126 | pat->rules[i + 1] = NULL; |
127 | return(rule); | |
128 | } | |
129 | ||
130 | static struct pattern *newpattern(void) | |
131 | { | |
132 | struct pattern *pat; | |
133 | ||
134 | omalloc(pat); | |
135 | pat->rules = szmalloc(sizeof(*pat->rules)); | |
136 | return(pat); | |
137 | } | |
138 | ||
06c1a718 FT |
139 | static struct pattern *parsepattern(struct cfstate *s) |
140 | { | |
141 | struct pattern *pat; | |
142 | struct rule *rule; | |
143 | int sl; | |
144 | ||
145 | if(!strcmp(s->argv[0], "match")) { | |
146 | s->expstart = 1; | |
147 | pat = newpattern(); | |
148 | } else { | |
149 | return(NULL); | |
150 | } | |
151 | ||
152 | sl = s->lno; | |
153 | while(1) { | |
154 | getcfline(s); | |
155 | if(!strcmp(s->argv[0], "filename")) { | |
156 | if(s->argc < 2) { | |
157 | flog(LOG_WARNING, "%s:%i: missing pattern for `filename' match", s->file, s->lno); | |
158 | continue; | |
159 | } | |
160 | rule = newrule(pat); | |
161 | rule->type = PAT_BASENAME; | |
162 | rule->pattern = sstrdup(s->argv[1]); | |
163 | } else if(!strcmp(s->argv[0], "pathname")) { | |
164 | if(s->argc < 2) { | |
165 | flog(LOG_WARNING, "%s:%i: missing pattern for `pathname' match", s->file, s->lno); | |
166 | continue; | |
167 | } | |
168 | rule = newrule(pat); | |
169 | rule->type = PAT_PATHNAME; | |
170 | rule->pattern = sstrdup(s->argv[1]); | |
171 | } else if(!strcmp(s->argv[0], "all")) { | |
172 | newrule(pat)->type = PAT_ALL; | |
173 | } else if(!strcmp(s->argv[0], "default")) { | |
174 | newrule(pat)->type = PAT_DEFAULT; | |
175 | } else if(!strcmp(s->argv[0], "handler")) { | |
176 | if(s->argc < 2) { | |
177 | flog(LOG_WARNING, "%s:%i: missing child name for `handler' directive", s->file, s->lno); | |
178 | continue; | |
179 | } | |
180 | if(pat->childnm != NULL) | |
181 | free(pat->childnm); | |
182 | pat->childnm = sstrdup(s->argv[1]); | |
183 | } else if(!strcmp(s->argv[0], "end") || !strcmp(s->argv[0], "eof")) { | |
184 | break; | |
185 | } else { | |
186 | flog(LOG_WARNING, "%s:%i: unknown directive `%s' in pattern declaration", s->file, s->lno, s->argv[0]); | |
187 | } | |
188 | } | |
189 | ||
190 | if(pat->rules[0] == NULL) { | |
191 | flog(LOG_WARNING, "%s:%i: missing rules in match declaration", s->file, sl); | |
192 | freepattern(pat); | |
193 | return(NULL); | |
194 | } | |
195 | if(pat->childnm == NULL) { | |
196 | flog(LOG_WARNING, "%s:%i: missing handler in match declaration", s->file, sl); | |
197 | freepattern(pat); | |
198 | return(NULL); | |
199 | } | |
200 | return(pat); | |
201 | } | |
202 | ||
17e55136 FT |
203 | static struct config *emptyconfig(void) |
204 | { | |
205 | struct config *cf; | |
206 | ||
207 | omalloc(cf); | |
208 | return(cf); | |
209 | } | |
210 | ||
211 | static struct config *readconfig(char *file) | |
992ce9ef | 212 | { |
06c1a718 FT |
213 | struct cfstate *s; |
214 | FILE *in; | |
992ce9ef | 215 | struct config *cf; |
992ce9ef FT |
216 | struct child *child; |
217 | struct pattern *pat; | |
992ce9ef | 218 | |
17e55136 FT |
219 | if((in = fopen(file, "r")) == NULL) { |
220 | flog(LOG_WARNING, "%s: %s", file, strerror(errno)); | |
992ce9ef | 221 | return(NULL); |
06c1a718 | 222 | } |
17e55136 FT |
223 | s = mkcfparser(in, file); |
224 | cf = emptyconfig(); | |
06c1a718 FT |
225 | |
226 | while(1) { | |
227 | getcfline(s); | |
228 | if((child = parsechild(s)) != NULL) { | |
229 | child->next = cf->children; | |
230 | cf->children = child; | |
231 | } else if((pat = parsepattern(s)) != NULL) { | |
232 | pat->next = cf->patterns; | |
233 | cf->patterns = pat; | |
234 | } else if(!strcmp(s->argv[0], "eof")) { | |
235 | break; | |
236 | } else { | |
237 | flog(LOG_WARNING, "%s:%i: unknown directive `%s'", s->file, s->lno, s->argv[0]); | |
992ce9ef | 238 | } |
06c1a718 | 239 | } |
992ce9ef | 240 | |
06c1a718 FT |
241 | freecfparser(s); |
242 | fclose(in); | |
992ce9ef FT |
243 | return(cf); |
244 | } | |
245 | ||
246 | static struct config *getconfig(char *path) | |
247 | { | |
248 | struct config *cf; | |
249 | struct stat sb; | |
17e55136 FT |
250 | char *fn; |
251 | time_t mtime; | |
992ce9ef | 252 | |
17e55136 | 253 | fn = sprintf3("%s/.htrc", path); |
992ce9ef FT |
254 | for(cf = cflist; cf != NULL; cf = cf->next) { |
255 | if(!strcmp(cf->path, path)) { | |
17e55136 FT |
256 | if(now - cf->lastck > 5) { |
257 | if(stat(fn, &sb) || (sb.st_mtime != cf->mtime)) { | |
258 | freeconfig(cf); | |
259 | break; | |
260 | } | |
992ce9ef | 261 | } |
17e55136 | 262 | cf->lastck = now; |
992ce9ef FT |
263 | return(cf); |
264 | } | |
265 | } | |
17e55136 FT |
266 | if(access(fn, R_OK) || stat(fn, &sb)) { |
267 | cf = emptyconfig(); | |
268 | mtime = 0; | |
269 | } else { | |
270 | if((cf = readconfig(fn)) == NULL) | |
271 | return(NULL); | |
272 | mtime = sb.st_mtime; | |
992ce9ef | 273 | } |
17e55136 FT |
274 | cf->path = sstrdup(path); |
275 | cf->mtime = mtime; | |
276 | cf->lastck = now; | |
277 | cf->next = cflist; | |
278 | cflist = cf; | |
992ce9ef FT |
279 | return(cf); |
280 | } | |
281 | ||
8dce6d19 | 282 | static struct config **getconfigs(char *file) |
992ce9ef | 283 | { |
8dce6d19 FT |
284 | static struct config **ret = NULL; |
285 | struct { | |
286 | struct config **b; | |
287 | size_t s, d; | |
288 | } buf; | |
992ce9ef | 289 | struct config *cf; |
8dce6d19 FT |
290 | char *tmp, *p; |
291 | ||
292 | if(ret != NULL) | |
293 | free(ret); | |
294 | bufinit(buf); | |
295 | tmp = sstrdup(file); | |
992ce9ef | 296 | while(1) { |
8dce6d19 | 297 | if((p = strrchr(tmp, '/')) == NULL) |
992ce9ef | 298 | break; |
8dce6d19 FT |
299 | *p = 0; |
300 | if((cf = getconfig(tmp)) != NULL) | |
301 | bufadd(buf, cf); | |
302 | } | |
303 | free(tmp); | |
304 | if((cf = getconfig(".")) != NULL) | |
305 | bufadd(buf, cf); | |
0fc6fd13 FT |
306 | if(lconfig != NULL) |
307 | bufadd(buf, lconfig); | |
308 | if(gconfig != NULL) | |
309 | bufadd(buf, gconfig); | |
8dce6d19 FT |
310 | bufadd(buf, NULL); |
311 | return(ret = buf.b); | |
312 | } | |
313 | ||
314 | static struct child *findchild(char *file, char *name) | |
315 | { | |
316 | int i; | |
317 | struct config **cfs; | |
318 | struct child *ch; | |
319 | ||
320 | cfs = getconfigs(file); | |
321 | for(i = 0; cfs[i] != NULL; i++) { | |
322 | if((ch = getchild(cfs[i], name)) != NULL) | |
992ce9ef FT |
323 | break; |
324 | } | |
992ce9ef FT |
325 | return(ch); |
326 | } | |
327 | ||
328 | static struct pattern *findmatch(char *file, int trydefault) | |
329 | { | |
8dce6d19 FT |
330 | int i, c; |
331 | char *bn; | |
332 | struct config **cfs; | |
992ce9ef FT |
333 | struct pattern *pat; |
334 | struct rule *rule; | |
335 | ||
336 | if((bn = strrchr(file, '/')) != NULL) | |
337 | bn++; | |
338 | else | |
339 | bn = file; | |
8dce6d19 FT |
340 | cfs = getconfigs(file); |
341 | for(c = 0; cfs[c] != NULL; c++) { | |
342 | for(pat = cfs[c]->patterns; pat != NULL; pat = pat->next) { | |
992ce9ef FT |
343 | for(i = 0; (rule = pat->rules[i]) != NULL; i++) { |
344 | if(rule->type == PAT_BASENAME) { | |
345 | if(fnmatch(rule->pattern, bn, 0)) | |
346 | break; | |
347 | } else if(rule->type == PAT_PATHNAME) { | |
348 | if(fnmatch(rule->pattern, file, FNM_PATHNAME)) | |
349 | break; | |
350 | } else if(rule->type == PAT_ALL) { | |
351 | } else if(rule->type == PAT_DEFAULT) { | |
352 | if(!trydefault) | |
353 | break; | |
354 | } | |
355 | } | |
356 | if(!rule) | |
8dce6d19 | 357 | return(pat); |
992ce9ef FT |
358 | } |
359 | } | |
8dce6d19 | 360 | return(NULL); |
992ce9ef FT |
361 | } |
362 | ||
54cefaba | 363 | static void handlefile(struct hthead *req, int fd, char *path) |
992ce9ef | 364 | { |
992ce9ef FT |
365 | struct pattern *pat; |
366 | struct child *ch; | |
54cefaba FT |
367 | |
368 | headappheader(req, "X-Ash-File", path); | |
369 | if(((pat = findmatch(path, 0)) == NULL) && ((pat = findmatch(path, 1)) == NULL)) { | |
d58ed97c | 370 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
992ce9ef FT |
371 | return; |
372 | } | |
54cefaba | 373 | if((ch = findchild(path, pat->childnm)) == NULL) { |
992ce9ef | 374 | flog(LOG_ERR, "child %s requested, but was not declared", pat->childnm); |
d422fdfd | 375 | simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", pat->childnm); |
992ce9ef FT |
376 | return; |
377 | } | |
378 | ||
d1b065b5 FT |
379 | if(childhandle(ch, req, fd)) |
380 | simpleerror(fd, 500, "Server Error", "The request handler crashed."); | |
54cefaba FT |
381 | } |
382 | ||
383 | static void handledir(struct hthead *req, int fd, char *path) | |
384 | { | |
d422fdfd | 385 | /* XXX: Todo */ |
06c1a718 | 386 | simpleerror(fd, 403, "Not Authorized", "Will not send directory listings or indices yet."); |
54cefaba FT |
387 | } |
388 | ||
389 | static int checkdir(struct hthead *req, int fd, char *path) | |
390 | { | |
391 | return(0); | |
392 | } | |
393 | ||
394 | static void serve(struct hthead *req, int fd) | |
395 | { | |
396 | char *p, *p2, *path, *tmp, *buf, *p3, *nm; | |
397 | struct stat sb; | |
398 | DIR *dir; | |
399 | struct dirent *dent; | |
992ce9ef | 400 | |
17e55136 | 401 | now = time(NULL); |
54cefaba FT |
402 | nm = req->rest; |
403 | path = sstrdup("."); | |
404 | p = nm; | |
405 | while(1) { | |
406 | if((p2 = strchr(p, '/')) == NULL) { | |
407 | } else { | |
408 | *(p2++) = 0; | |
409 | } | |
410 | ||
411 | if(!*p) { | |
412 | if(p2 == NULL) { | |
413 | if(stat(path, &sb)) { | |
414 | flog(LOG_WARNING, "failed to stat previously stated directory %s: %s", path, strerror(errno)); | |
d422fdfd | 415 | simpleerror(fd, 500, "Internal Server Error", "The server encountered an unexpected condition."); |
54cefaba FT |
416 | goto fail; |
417 | } | |
418 | break; | |
419 | } else { | |
d422fdfd | 420 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
421 | goto fail; |
422 | } | |
423 | } | |
d422fdfd FT |
424 | if(*p == '.') { |
425 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); | |
54cefaba | 426 | goto fail; |
d422fdfd | 427 | } |
54cefaba FT |
428 | |
429 | getconfig(path); | |
430 | ||
431 | /* | |
432 | * First, check the name verbatimely: | |
433 | */ | |
434 | buf = sprintf3("%s/%s", path, p); | |
435 | if(!stat(buf, &sb)) { | |
436 | if(S_ISDIR(sb.st_mode)) { | |
437 | tmp = path; | |
438 | if(!strcmp(path, ".")) | |
439 | path = sstrdup(p); | |
440 | else | |
441 | path = sprintf2("%s/%s", path, p); | |
442 | free(tmp); | |
755faed0 FT |
443 | if(p2 == NULL) { |
444 | stdredir(req, fd, 301, sprintf3("%s/", p)); | |
445 | goto out; | |
446 | } | |
54cefaba FT |
447 | if(checkdir(req, fd, path)) |
448 | break; | |
449 | goto next; | |
450 | } | |
451 | if(S_ISREG(sb.st_mode)) { | |
452 | tmp = path; | |
453 | path = sprintf2("%s/%s", path, p); | |
454 | free(tmp); | |
455 | break; | |
456 | } | |
d422fdfd | 457 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
458 | goto fail; |
459 | } | |
460 | ||
461 | /* | |
462 | * Check the file extensionlessly: | |
463 | */ | |
464 | if(!strchr(p, '.') && ((dir = opendir(path)) != NULL)) { | |
465 | while((dent = readdir(dir)) != NULL) { | |
466 | buf = sprintf3("%s/%s", path, dent->d_name); | |
467 | if((p3 = strchr(dent->d_name, '.')) != NULL) | |
468 | *p3 = 0; | |
469 | if(strcmp(dent->d_name, p)) | |
470 | continue; | |
471 | if(stat(buf, &sb)) | |
472 | continue; | |
473 | if(!S_ISREG(sb.st_mode)) | |
474 | continue; | |
475 | tmp = path; | |
476 | path = sstrdup(buf); | |
477 | free(tmp); | |
478 | break; | |
479 | } | |
480 | closedir(dir); | |
481 | if(dent != NULL) | |
482 | break; | |
483 | } | |
484 | ||
d422fdfd | 485 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
486 | goto fail; |
487 | ||
488 | next: | |
489 | if(p2 == NULL) | |
490 | break; | |
491 | p = p2; | |
492 | } | |
493 | if(p2 == NULL) | |
494 | replrest(req, ""); | |
495 | else | |
496 | replrest(req, p2); | |
497 | if(!strncmp(path, "./", 2)) | |
498 | memmove(path, path + 2, strlen(path + 2) + 1); | |
499 | if(S_ISDIR(sb.st_mode)) { | |
500 | handledir(req, fd, path); | |
501 | } else if(S_ISREG(sb.st_mode)) { | |
502 | handlefile(req, fd, path); | |
503 | } else { | |
d422fdfd | 504 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
505 | goto fail; |
506 | } | |
507 | goto out; | |
508 | ||
509 | fail: | |
d422fdfd | 510 | /* No special handling, for now at least. */ |
54cefaba FT |
511 | out: |
512 | free(path); | |
992ce9ef FT |
513 | } |
514 | ||
0fc6fd13 FT |
515 | static void usage(FILE *out) |
516 | { | |
517 | fprintf(out, "usage: dirplex [-hN] [-c CONFIG] DIR\n"); | |
518 | } | |
519 | ||
992ce9ef FT |
520 | int main(int argc, char **argv) |
521 | { | |
0fc6fd13 FT |
522 | int c; |
523 | int nodef; | |
524 | char *gcf, *lcf; | |
992ce9ef FT |
525 | struct hthead *req; |
526 | int fd; | |
527 | ||
0fc6fd13 FT |
528 | nodef = 0; |
529 | lcf = NULL; | |
530 | while((c = getopt(argc, argv, "hNc:")) >= 0) { | |
531 | switch(c) { | |
532 | case 'h': | |
533 | usage(stdout); | |
534 | exit(0); | |
535 | case 'N': | |
536 | nodef = 1; | |
537 | break; | |
538 | case 'c': | |
539 | lcf = optarg; | |
540 | break; | |
541 | default: | |
542 | usage(stderr); | |
543 | exit(1); | |
544 | } | |
545 | } | |
546 | if(argc - optind < 1) { | |
547 | usage(stderr); | |
992ce9ef FT |
548 | exit(1); |
549 | } | |
0fc6fd13 FT |
550 | if(!nodef) { |
551 | if((gcf = findstdconf("ashd/dirplex.rc")) != NULL) { | |
552 | gconfig = readconfig(gcf); | |
553 | free(gcf); | |
554 | } | |
555 | } | |
556 | if(lcf != NULL) { | |
557 | if((lconfig = readconfig(lcf)) == NULL) | |
558 | exit(1); | |
559 | } | |
560 | if(chdir(argv[optind])) { | |
561 | flog(LOG_ERR, "could not change directory to %s: %s", argv[optind], strerror(errno)); | |
992ce9ef FT |
562 | exit(1); |
563 | } | |
564 | signal(SIGCHLD, SIG_IGN); | |
565 | while(1) { | |
566 | if((fd = recvreq(0, &req)) < 0) { | |
567 | if(errno != 0) | |
568 | flog(LOG_ERR, "recvreq: %s", strerror(errno)); | |
569 | break; | |
570 | } | |
571 | serve(req, fd); | |
572 | freehthead(req); | |
573 | close(fd); | |
574 | } | |
575 | return(0); | |
576 | } |