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; | |
624f637d | 62 | char **fchild; |
992ce9ef FT |
63 | struct rule **rules; |
64 | }; | |
65 | ||
0fc6fd13 FT |
66 | static struct config *cflist; |
67 | static struct config *gconfig, *lconfig; | |
17e55136 | 68 | static time_t now; |
992ce9ef | 69 | |
992ce9ef FT |
70 | static void freepattern(struct pattern *pat) |
71 | { | |
72 | struct rule **rule; | |
73 | ||
74 | for(rule = pat->rules; *rule; rule++) { | |
75 | if((*rule)->pattern != NULL) | |
76 | free((*rule)->pattern); | |
77 | free(*rule); | |
78 | } | |
79 | if(pat->childnm != NULL) | |
80 | free(pat->childnm); | |
624f637d | 81 | freeca(pat->fchild); |
992ce9ef FT |
82 | free(pat); |
83 | } | |
84 | ||
85 | static void freeconfig(struct config *cf) | |
86 | { | |
87 | struct child *ch, *nch; | |
88 | struct pattern *pat, *npat; | |
89 | ||
90 | if(cf->prev != NULL) | |
91 | cf->prev->next = cf->next; | |
92 | if(cf->next != NULL) | |
93 | cf->next->prev = cf->prev; | |
94 | if(cf == cflist) | |
95 | cflist = cf->next; | |
0fc6fd13 FT |
96 | if(cf->path != NULL) |
97 | free(cf->path); | |
992ce9ef FT |
98 | for(ch = cf->children; ch != NULL; ch = nch) { |
99 | nch = ch->next; | |
100 | freechild(ch); | |
101 | } | |
102 | for(pat = cf->patterns; pat != NULL; pat = npat) { | |
103 | npat = pat->next; | |
104 | freepattern(pat); | |
105 | } | |
106 | free(cf); | |
107 | } | |
108 | ||
992ce9ef FT |
109 | static struct child *getchild(struct config *cf, char *name) |
110 | { | |
111 | struct child *ch; | |
112 | ||
113 | for(ch = cf->children; ch; ch = ch->next) { | |
114 | if(!strcmp(ch->name, name)) | |
115 | break; | |
116 | } | |
117 | return(ch); | |
118 | } | |
119 | ||
120 | static struct rule *newrule(struct pattern *pat) | |
121 | { | |
122 | int i; | |
123 | struct rule *rule; | |
124 | ||
125 | for(i = 0; pat->rules[i]; i++); | |
126 | pat->rules = srealloc(pat->rules, sizeof(*pat->rules) * (i + 2)); | |
cceb3611 | 127 | rule = pat->rules[i] = szmalloc(sizeof(*rule)); |
992ce9ef FT |
128 | pat->rules[i + 1] = NULL; |
129 | return(rule); | |
130 | } | |
131 | ||
132 | static struct pattern *newpattern(void) | |
133 | { | |
134 | struct pattern *pat; | |
135 | ||
136 | omalloc(pat); | |
137 | pat->rules = szmalloc(sizeof(*pat->rules)); | |
138 | return(pat); | |
139 | } | |
140 | ||
06c1a718 FT |
141 | static struct pattern *parsepattern(struct cfstate *s) |
142 | { | |
143 | struct pattern *pat; | |
144 | struct rule *rule; | |
624f637d | 145 | int sl, i; |
06c1a718 FT |
146 | |
147 | if(!strcmp(s->argv[0], "match")) { | |
148 | s->expstart = 1; | |
149 | pat = newpattern(); | |
150 | } else { | |
151 | return(NULL); | |
152 | } | |
153 | ||
154 | sl = s->lno; | |
155 | while(1) { | |
156 | getcfline(s); | |
157 | if(!strcmp(s->argv[0], "filename")) { | |
158 | if(s->argc < 2) { | |
159 | flog(LOG_WARNING, "%s:%i: missing pattern for `filename' match", s->file, s->lno); | |
160 | continue; | |
161 | } | |
162 | rule = newrule(pat); | |
163 | rule->type = PAT_BASENAME; | |
164 | rule->pattern = sstrdup(s->argv[1]); | |
165 | } else if(!strcmp(s->argv[0], "pathname")) { | |
166 | if(s->argc < 2) { | |
167 | flog(LOG_WARNING, "%s:%i: missing pattern for `pathname' match", s->file, s->lno); | |
168 | continue; | |
169 | } | |
170 | rule = newrule(pat); | |
171 | rule->type = PAT_PATHNAME; | |
172 | rule->pattern = sstrdup(s->argv[1]); | |
173 | } else if(!strcmp(s->argv[0], "all")) { | |
174 | newrule(pat)->type = PAT_ALL; | |
175 | } else if(!strcmp(s->argv[0], "default")) { | |
176 | newrule(pat)->type = PAT_DEFAULT; | |
177 | } else if(!strcmp(s->argv[0], "handler")) { | |
178 | if(s->argc < 2) { | |
179 | flog(LOG_WARNING, "%s:%i: missing child name for `handler' directive", s->file, s->lno); | |
180 | continue; | |
181 | } | |
182 | if(pat->childnm != NULL) | |
183 | free(pat->childnm); | |
184 | pat->childnm = sstrdup(s->argv[1]); | |
624f637d FT |
185 | } else if(!strcmp(s->argv[0], "fork")) { |
186 | pat->fchild = smalloc(sizeof(*pat->fchild) * s->argc); | |
187 | for(i = 0; i < s->argc - 1; i++) | |
188 | pat->fchild[i] = sstrdup(s->argv[i + 1]); | |
189 | pat->fchild[i] = 0; | |
06c1a718 FT |
190 | } else if(!strcmp(s->argv[0], "end") || !strcmp(s->argv[0], "eof")) { |
191 | break; | |
192 | } else { | |
193 | flog(LOG_WARNING, "%s:%i: unknown directive `%s' in pattern declaration", s->file, s->lno, s->argv[0]); | |
194 | } | |
195 | } | |
196 | ||
197 | if(pat->rules[0] == NULL) { | |
198 | flog(LOG_WARNING, "%s:%i: missing rules in match declaration", s->file, sl); | |
199 | freepattern(pat); | |
200 | return(NULL); | |
201 | } | |
624f637d | 202 | if((pat->childnm == NULL) && (pat->fchild == NULL)) { |
06c1a718 FT |
203 | flog(LOG_WARNING, "%s:%i: missing handler in match declaration", s->file, sl); |
204 | freepattern(pat); | |
205 | return(NULL); | |
206 | } | |
207 | return(pat); | |
208 | } | |
209 | ||
17e55136 FT |
210 | static struct config *emptyconfig(void) |
211 | { | |
212 | struct config *cf; | |
213 | ||
214 | omalloc(cf); | |
215 | return(cf); | |
216 | } | |
217 | ||
218 | static struct config *readconfig(char *file) | |
992ce9ef | 219 | { |
06c1a718 FT |
220 | struct cfstate *s; |
221 | FILE *in; | |
992ce9ef | 222 | struct config *cf; |
992ce9ef FT |
223 | struct child *child; |
224 | struct pattern *pat; | |
992ce9ef | 225 | |
17e55136 FT |
226 | if((in = fopen(file, "r")) == NULL) { |
227 | flog(LOG_WARNING, "%s: %s", file, strerror(errno)); | |
992ce9ef | 228 | return(NULL); |
06c1a718 | 229 | } |
17e55136 FT |
230 | s = mkcfparser(in, file); |
231 | cf = emptyconfig(); | |
06c1a718 FT |
232 | |
233 | while(1) { | |
234 | getcfline(s); | |
235 | if((child = parsechild(s)) != NULL) { | |
236 | child->next = cf->children; | |
237 | cf->children = child; | |
238 | } else if((pat = parsepattern(s)) != NULL) { | |
239 | pat->next = cf->patterns; | |
240 | cf->patterns = pat; | |
241 | } else if(!strcmp(s->argv[0], "eof")) { | |
242 | break; | |
243 | } else { | |
244 | flog(LOG_WARNING, "%s:%i: unknown directive `%s'", s->file, s->lno, s->argv[0]); | |
992ce9ef | 245 | } |
06c1a718 | 246 | } |
992ce9ef | 247 | |
06c1a718 FT |
248 | freecfparser(s); |
249 | fclose(in); | |
992ce9ef FT |
250 | return(cf); |
251 | } | |
252 | ||
253 | static struct config *getconfig(char *path) | |
254 | { | |
255 | struct config *cf; | |
256 | struct stat sb; | |
17e55136 FT |
257 | char *fn; |
258 | time_t mtime; | |
992ce9ef | 259 | |
17e55136 | 260 | fn = sprintf3("%s/.htrc", path); |
992ce9ef FT |
261 | for(cf = cflist; cf != NULL; cf = cf->next) { |
262 | if(!strcmp(cf->path, path)) { | |
17e55136 FT |
263 | if(now - cf->lastck > 5) { |
264 | if(stat(fn, &sb) || (sb.st_mtime != cf->mtime)) { | |
265 | freeconfig(cf); | |
266 | break; | |
267 | } | |
992ce9ef | 268 | } |
17e55136 | 269 | cf->lastck = now; |
992ce9ef FT |
270 | return(cf); |
271 | } | |
272 | } | |
17e55136 FT |
273 | if(access(fn, R_OK) || stat(fn, &sb)) { |
274 | cf = emptyconfig(); | |
275 | mtime = 0; | |
276 | } else { | |
277 | if((cf = readconfig(fn)) == NULL) | |
278 | return(NULL); | |
279 | mtime = sb.st_mtime; | |
992ce9ef | 280 | } |
17e55136 FT |
281 | cf->path = sstrdup(path); |
282 | cf->mtime = mtime; | |
283 | cf->lastck = now; | |
284 | cf->next = cflist; | |
285 | cflist = cf; | |
992ce9ef FT |
286 | return(cf); |
287 | } | |
288 | ||
8dce6d19 | 289 | static struct config **getconfigs(char *file) |
992ce9ef | 290 | { |
8dce6d19 FT |
291 | static struct config **ret = NULL; |
292 | struct { | |
293 | struct config **b; | |
294 | size_t s, d; | |
295 | } buf; | |
992ce9ef | 296 | struct config *cf; |
8dce6d19 FT |
297 | char *tmp, *p; |
298 | ||
299 | if(ret != NULL) | |
300 | free(ret); | |
301 | bufinit(buf); | |
302 | tmp = sstrdup(file); | |
992ce9ef | 303 | while(1) { |
8dce6d19 | 304 | if((p = strrchr(tmp, '/')) == NULL) |
992ce9ef | 305 | break; |
8dce6d19 FT |
306 | *p = 0; |
307 | if((cf = getconfig(tmp)) != NULL) | |
308 | bufadd(buf, cf); | |
309 | } | |
310 | free(tmp); | |
311 | if((cf = getconfig(".")) != NULL) | |
312 | bufadd(buf, cf); | |
0fc6fd13 FT |
313 | if(lconfig != NULL) |
314 | bufadd(buf, lconfig); | |
315 | if(gconfig != NULL) | |
316 | bufadd(buf, gconfig); | |
8dce6d19 FT |
317 | bufadd(buf, NULL); |
318 | return(ret = buf.b); | |
319 | } | |
320 | ||
321 | static struct child *findchild(char *file, char *name) | |
322 | { | |
323 | int i; | |
324 | struct config **cfs; | |
325 | struct child *ch; | |
326 | ||
327 | cfs = getconfigs(file); | |
328 | for(i = 0; cfs[i] != NULL; i++) { | |
329 | if((ch = getchild(cfs[i], name)) != NULL) | |
992ce9ef FT |
330 | break; |
331 | } | |
992ce9ef FT |
332 | return(ch); |
333 | } | |
334 | ||
335 | static struct pattern *findmatch(char *file, int trydefault) | |
336 | { | |
8dce6d19 FT |
337 | int i, c; |
338 | char *bn; | |
339 | struct config **cfs; | |
992ce9ef FT |
340 | struct pattern *pat; |
341 | struct rule *rule; | |
342 | ||
343 | if((bn = strrchr(file, '/')) != NULL) | |
344 | bn++; | |
345 | else | |
346 | bn = file; | |
8dce6d19 FT |
347 | cfs = getconfigs(file); |
348 | for(c = 0; cfs[c] != NULL; c++) { | |
349 | for(pat = cfs[c]->patterns; pat != NULL; pat = pat->next) { | |
992ce9ef FT |
350 | for(i = 0; (rule = pat->rules[i]) != NULL; i++) { |
351 | if(rule->type == PAT_BASENAME) { | |
352 | if(fnmatch(rule->pattern, bn, 0)) | |
353 | break; | |
354 | } else if(rule->type == PAT_PATHNAME) { | |
355 | if(fnmatch(rule->pattern, file, FNM_PATHNAME)) | |
356 | break; | |
357 | } else if(rule->type == PAT_ALL) { | |
358 | } else if(rule->type == PAT_DEFAULT) { | |
359 | if(!trydefault) | |
360 | break; | |
361 | } | |
362 | } | |
363 | if(!rule) | |
8dce6d19 | 364 | return(pat); |
992ce9ef FT |
365 | } |
366 | } | |
8dce6d19 | 367 | return(NULL); |
992ce9ef FT |
368 | } |
369 | ||
54cefaba | 370 | static void handlefile(struct hthead *req, int fd, char *path) |
992ce9ef | 371 | { |
992ce9ef FT |
372 | struct pattern *pat; |
373 | struct child *ch; | |
54cefaba FT |
374 | |
375 | headappheader(req, "X-Ash-File", path); | |
376 | if(((pat = findmatch(path, 0)) == NULL) && ((pat = findmatch(path, 1)) == NULL)) { | |
d58ed97c | 377 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
992ce9ef FT |
378 | return; |
379 | } | |
624f637d FT |
380 | if(pat->fchild) { |
381 | stdforkserve(pat->fchild, req, fd); | |
382 | } else { | |
383 | if((ch = findchild(path, pat->childnm)) == NULL) { | |
384 | flog(LOG_ERR, "child %s requested, but was not declared", pat->childnm); | |
385 | simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", pat->childnm); | |
386 | return; | |
387 | } | |
388 | if(childhandle(ch, req, fd)) | |
389 | simpleerror(fd, 500, "Server Error", "The request handler crashed."); | |
992ce9ef | 390 | } |
54cefaba FT |
391 | } |
392 | ||
393 | static void handledir(struct hthead *req, int fd, char *path) | |
394 | { | |
d422fdfd | 395 | /* XXX: Todo */ |
06c1a718 | 396 | simpleerror(fd, 403, "Not Authorized", "Will not send directory listings or indices yet."); |
54cefaba FT |
397 | } |
398 | ||
399 | static int checkdir(struct hthead *req, int fd, char *path) | |
400 | { | |
401 | return(0); | |
402 | } | |
403 | ||
404 | static void serve(struct hthead *req, int fd) | |
405 | { | |
406 | char *p, *p2, *path, *tmp, *buf, *p3, *nm; | |
407 | struct stat sb; | |
408 | DIR *dir; | |
409 | struct dirent *dent; | |
992ce9ef | 410 | |
17e55136 | 411 | now = time(NULL); |
54cefaba FT |
412 | nm = req->rest; |
413 | path = sstrdup("."); | |
414 | p = nm; | |
415 | while(1) { | |
416 | if((p2 = strchr(p, '/')) == NULL) { | |
417 | } else { | |
418 | *(p2++) = 0; | |
419 | } | |
420 | ||
421 | if(!*p) { | |
422 | if(p2 == NULL) { | |
423 | if(stat(path, &sb)) { | |
424 | flog(LOG_WARNING, "failed to stat previously stated directory %s: %s", path, strerror(errno)); | |
d422fdfd | 425 | simpleerror(fd, 500, "Internal Server Error", "The server encountered an unexpected condition."); |
54cefaba FT |
426 | goto fail; |
427 | } | |
428 | break; | |
429 | } else { | |
d422fdfd | 430 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
431 | goto fail; |
432 | } | |
433 | } | |
d422fdfd FT |
434 | if(*p == '.') { |
435 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); | |
54cefaba | 436 | goto fail; |
d422fdfd | 437 | } |
54cefaba FT |
438 | |
439 | getconfig(path); | |
440 | ||
441 | /* | |
442 | * First, check the name verbatimely: | |
443 | */ | |
444 | buf = sprintf3("%s/%s", path, p); | |
445 | if(!stat(buf, &sb)) { | |
446 | if(S_ISDIR(sb.st_mode)) { | |
447 | tmp = path; | |
448 | if(!strcmp(path, ".")) | |
449 | path = sstrdup(p); | |
450 | else | |
451 | path = sprintf2("%s/%s", path, p); | |
452 | free(tmp); | |
755faed0 FT |
453 | if(p2 == NULL) { |
454 | stdredir(req, fd, 301, sprintf3("%s/", p)); | |
455 | goto out; | |
456 | } | |
54cefaba FT |
457 | if(checkdir(req, fd, path)) |
458 | break; | |
459 | goto next; | |
460 | } | |
461 | if(S_ISREG(sb.st_mode)) { | |
462 | tmp = path; | |
463 | path = sprintf2("%s/%s", path, p); | |
464 | free(tmp); | |
465 | break; | |
466 | } | |
d422fdfd | 467 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
468 | goto fail; |
469 | } | |
470 | ||
471 | /* | |
472 | * Check the file extensionlessly: | |
473 | */ | |
474 | if(!strchr(p, '.') && ((dir = opendir(path)) != NULL)) { | |
475 | while((dent = readdir(dir)) != NULL) { | |
476 | buf = sprintf3("%s/%s", path, dent->d_name); | |
477 | if((p3 = strchr(dent->d_name, '.')) != NULL) | |
478 | *p3 = 0; | |
479 | if(strcmp(dent->d_name, p)) | |
480 | continue; | |
481 | if(stat(buf, &sb)) | |
482 | continue; | |
483 | if(!S_ISREG(sb.st_mode)) | |
484 | continue; | |
485 | tmp = path; | |
486 | path = sstrdup(buf); | |
487 | free(tmp); | |
488 | break; | |
489 | } | |
490 | closedir(dir); | |
491 | if(dent != NULL) | |
492 | break; | |
493 | } | |
494 | ||
d422fdfd | 495 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
496 | goto fail; |
497 | ||
498 | next: | |
499 | if(p2 == NULL) | |
500 | break; | |
501 | p = p2; | |
502 | } | |
503 | if(p2 == NULL) | |
504 | replrest(req, ""); | |
505 | else | |
506 | replrest(req, p2); | |
507 | if(!strncmp(path, "./", 2)) | |
508 | memmove(path, path + 2, strlen(path + 2) + 1); | |
509 | if(S_ISDIR(sb.st_mode)) { | |
510 | handledir(req, fd, path); | |
511 | } else if(S_ISREG(sb.st_mode)) { | |
512 | handlefile(req, fd, path); | |
513 | } else { | |
d422fdfd | 514 | simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource."); |
54cefaba FT |
515 | goto fail; |
516 | } | |
517 | goto out; | |
518 | ||
519 | fail: | |
d422fdfd | 520 | /* No special handling, for now at least. */ |
54cefaba FT |
521 | out: |
522 | free(path); | |
992ce9ef FT |
523 | } |
524 | ||
0fc6fd13 FT |
525 | static void usage(FILE *out) |
526 | { | |
527 | fprintf(out, "usage: dirplex [-hN] [-c CONFIG] DIR\n"); | |
528 | } | |
529 | ||
992ce9ef FT |
530 | int main(int argc, char **argv) |
531 | { | |
0fc6fd13 FT |
532 | int c; |
533 | int nodef; | |
534 | char *gcf, *lcf; | |
992ce9ef FT |
535 | struct hthead *req; |
536 | int fd; | |
537 | ||
0fc6fd13 FT |
538 | nodef = 0; |
539 | lcf = NULL; | |
540 | while((c = getopt(argc, argv, "hNc:")) >= 0) { | |
541 | switch(c) { | |
542 | case 'h': | |
543 | usage(stdout); | |
544 | exit(0); | |
545 | case 'N': | |
546 | nodef = 1; | |
547 | break; | |
548 | case 'c': | |
549 | lcf = optarg; | |
550 | break; | |
551 | default: | |
552 | usage(stderr); | |
553 | exit(1); | |
554 | } | |
555 | } | |
556 | if(argc - optind < 1) { | |
557 | usage(stderr); | |
992ce9ef FT |
558 | exit(1); |
559 | } | |
0fc6fd13 FT |
560 | if(!nodef) { |
561 | if((gcf = findstdconf("ashd/dirplex.rc")) != NULL) { | |
562 | gconfig = readconfig(gcf); | |
563 | free(gcf); | |
564 | } | |
565 | } | |
566 | if(lcf != NULL) { | |
567 | if((lconfig = readconfig(lcf)) == NULL) | |
568 | exit(1); | |
569 | } | |
570 | if(chdir(argv[optind])) { | |
571 | flog(LOG_ERR, "could not change directory to %s: %s", argv[optind], strerror(errno)); | |
992ce9ef FT |
572 | exit(1); |
573 | } | |
574 | signal(SIGCHLD, SIG_IGN); | |
575 | while(1) { | |
576 | if((fd = recvreq(0, &req)) < 0) { | |
577 | if(errno != 0) | |
578 | flog(LOG_ERR, "recvreq: %s", strerror(errno)); | |
579 | break; | |
580 | } | |
581 | serve(req, fd); | |
582 | freehthead(req); | |
583 | close(fd); | |
584 | } | |
585 | return(0); | |
586 | } |