doc: Fixed typo.
[ashd.git] / src / dirplex / conf.c
... / ...
CommitLineData
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 <unistd.h>
22#include <string.h>
23#include <errno.h>
24#include <fnmatch.h>
25#include <sys/stat.h>
26
27#ifdef HAVE_CONFIG_H
28#include <config.h>
29#endif
30#include <utils.h>
31#include <log.h>
32#include <cf.h>
33#include <resp.h>
34
35#include "dirplex.h"
36
37static struct config *cflist;
38struct config *gconfig, *lconfig;
39
40static void freerule(struct rule *rule)
41{
42 freeca(rule->patterns);
43 free(rule);
44}
45
46static void freepattern(struct pattern *pat)
47{
48 struct rule **rule;
49 struct headmod *head;
50
51 for(rule = pat->rules; *rule; rule++)
52 freerule(*rule);
53 while((head = pat->headers) != NULL) {
54 pat->headers = head->next;
55 free(head->name);
56 free(head->value);
57 free(head);
58 }
59 if(pat->childnm != NULL)
60 free(pat->childnm);
61 freeca(pat->fchild);
62 free(pat);
63}
64
65static void freeconfig(struct config *cf)
66{
67 struct child *ch, *nch;
68 struct pattern *pat, *npat;
69
70 if(cf->prev != NULL)
71 cf->prev->next = cf->next;
72 if(cf->next != NULL)
73 cf->next->prev = cf->prev;
74 if(cf == cflist)
75 cflist = cf->next;
76 if(cf->path != NULL)
77 free(cf->path);
78 for(ch = cf->children; ch != NULL; ch = nch) {
79 nch = ch->next;
80 freechild(ch);
81 }
82 for(pat = cf->patterns; pat != NULL; pat = npat) {
83 npat = pat->next;
84 freepattern(pat);
85 }
86 freeca(cf->index);
87 if(cf->capture != NULL)
88 free(cf->capture);
89 if(cf->reparse != NULL)
90 free(cf->reparse);
91 free(cf);
92}
93
94struct child *getchild(struct config *cf, char *name)
95{
96 struct child *ch;
97
98 for(ch = cf->children; ch; ch = ch->next) {
99 if(!strcmp(ch->name, name))
100 break;
101 }
102 return(ch);
103}
104
105static struct rule *newrule(struct pattern *pat)
106{
107 int i;
108 struct rule *rule;
109
110 for(i = 0; pat->rules[i]; i++);
111 pat->rules = srealloc(pat->rules, sizeof(*pat->rules) * (i + 2));
112 rule = pat->rules[i] = szmalloc(sizeof(*rule));
113 pat->rules[i + 1] = NULL;
114 return(rule);
115}
116
117static struct pattern *newpattern(void)
118{
119 struct pattern *pat;
120
121 omalloc(pat);
122 pat->rules = szmalloc(sizeof(*pat->rules));
123 return(pat);
124}
125
126static char **cadup(char **w)
127{
128 char **ret;
129 int i, l;
130
131 l = calen(w);
132 ret = smalloc(sizeof(*ret) * (l + 1));
133 for(i = 0; i < l; i++)
134 ret[i] = sstrdup(w[i]);
135 ret[i] = NULL;
136 return(ret);
137}
138
139static struct pattern *parsepattern(struct cfstate *s)
140{
141 struct pattern *pat;
142 struct rule *rule;
143 struct headmod *head;
144 int sl;
145
146 if(!strcmp(s->argv[0], "match")) {
147 s->expstart = 1;
148 pat = newpattern();
149 } else {
150 return(NULL);
151 }
152
153 if((s->argc > 1) && !strcmp(s->argv[1], "directory"))
154 pat->type = PT_DIR;
155 else if((s->argc > 1) && !strcmp(s->argv[1], "notfound"))
156 pat->type = PT_NOTFOUND;
157 else
158 pat->type = PT_FILE;
159 sl = s->lno;
160 while(1) {
161 getcfline(s);
162 if(!strcmp(s->argv[0], "filename")) {
163 if(s->argc < 2) {
164 flog(LOG_WARNING, "%s:%i: missing pattern for `filename' match", s->file, s->lno);
165 continue;
166 }
167 rule = newrule(pat);
168 rule->type = PAT_BASENAME;
169 rule->patterns = cadup(s->argv + 1);
170 } else if(!strcmp(s->argv[0], "pathname")) {
171 if(s->argc < 2) {
172 flog(LOG_WARNING, "%s:%i: missing pattern for `pathname' match", s->file, s->lno);
173 continue;
174 }
175 rule = newrule(pat);
176 rule->type = PAT_PATHNAME;
177 rule->patterns = cadup(s->argv + 1);
178 } else if(!strcmp(s->argv[0], "all")) {
179 newrule(pat)->type = PAT_ALL;
180 } else if(!strcmp(s->argv[0], "default")) {
181 newrule(pat)->type = PAT_DEFAULT;
182 } else if(!strcmp(s->argv[0], "local")) {
183 newrule(pat)->type = PAT_LOCAL;
184 } else if(!strcmp(s->argv[0], "handler")) {
185 if(s->argc < 2) {
186 flog(LOG_WARNING, "%s:%i: missing child name for `handler' directive", s->file, s->lno);
187 continue;
188 }
189 if(pat->childnm != NULL)
190 free(pat->childnm);
191 pat->childnm = sstrdup(s->argv[1]);
192 } else if(!strcmp(s->argv[0], "fork")) {
193 pat->fchild = cadup(s->argv + 1);
194 } else if(!strcmp(s->argv[0], "set") || !strcmp(s->argv[0], "xset")) {
195 if(s->argc < 3) {
196 flog(LOG_WARNING, "%s:%i: missing header name or pattern for `%s' directive", s->file, s->lno, s->argv[0]);
197 continue;
198 }
199 omalloc(head);
200 if(!strcmp(s->argv[0], "xset"))
201 head->name = sprintf2("X-Ash-%s", s->argv[1]);
202 else
203 head->name = sstrdup(s->argv[1]);
204 head->value = sstrdup(s->argv[2]);
205 head->next = pat->headers;
206 pat->headers = head;
207 } else if(!strcmp(s->argv[0], "end") || !strcmp(s->argv[0], "eof")) {
208 break;
209 } else {
210 flog(LOG_WARNING, "%s:%i: unknown directive `%s' in pattern declaration", s->file, s->lno, s->argv[0]);
211 }
212 }
213
214 if(pat->rules[0] == NULL) {
215 flog(LOG_WARNING, "%s:%i: missing rules in match declaration", s->file, sl);
216 freepattern(pat);
217 return(NULL);
218 }
219 if((pat->childnm == NULL) && (pat->fchild == NULL)) {
220 flog(LOG_WARNING, "%s:%i: missing handler in match declaration", s->file, sl);
221 freepattern(pat);
222 return(NULL);
223 }
224 return(pat);
225}
226
227static struct config *emptyconfig(void)
228{
229 struct config *cf;
230
231 omalloc(cf);
232 return(cf);
233}
234
235struct config *readconfig(char *file)
236{
237 struct cfstate *s;
238 FILE *in;
239 struct config *cf;
240 struct child *child;
241 struct pattern *pat;
242
243 if((in = fopen(file, "r")) == NULL) {
244 flog(LOG_WARNING, "%s: %s", file, strerror(errno));
245 return(NULL);
246 }
247 s = mkcfparser(in, file);
248 cf = emptyconfig();
249
250 while(1) {
251 getcfline(s);
252 if((child = parsechild(s)) != NULL) {
253 child->next = cf->children;
254 cf->children = child;
255 } else if((pat = parsepattern(s)) != NULL) {
256 pat->next = cf->patterns;
257 cf->patterns = pat;
258 } else if(!strcmp(s->argv[0], "index-file")) {
259 freeca(cf->index);
260 cf->index = cadup(s->argv + 1);
261 } else if(!strcmp(s->argv[0], "capture")) {
262 if(s->argc < 2) {
263 flog(LOG_WARNING, "%s:%i: missing argument to capture declaration", s->file, s->lno);
264 continue;
265 }
266 if(cf->capture != NULL)
267 free(cf->capture);
268 cf->capture = sstrdup(s->argv[1]);
269 cf->caproot = 0;
270 if((s->argc > 2) && strchr(s->argv[2], 'D'))
271 cf->caproot = 1;
272 } else if(!strcmp(s->argv[0], "reparse")) {
273 if(s->argc < 2) {
274 flog(LOG_WARNING, "%s:%i: missing argument to reparse declaration", s->file, s->lno);
275 continue;
276 }
277 if(cf->reparse != NULL)
278 free(cf->reparse);
279 cf->reparse = sstrdup(s->argv[1]);
280 cf->parsecomb = 0;
281 if((s->argc > 2) && strchr(s->argv[2], 'c'))
282 cf->parsecomb = 1;
283 } else if(!strcmp(s->argv[0], "eof")) {
284 break;
285 } else {
286 flog(LOG_WARNING, "%s:%i: unknown directive `%s'", s->file, s->lno, s->argv[0]);
287 }
288 }
289
290 freecfparser(s);
291 fclose(in);
292 return(cf);
293}
294
295struct config *getconfig(char *path)
296{
297 struct config *cf, *ocf;
298 struct stat sb;
299 char *fn;
300 time_t mtime;
301
302 fn = sprintf3("%s/.htrc", path);
303 for(cf = cflist; cf != NULL; cf = cf->next) {
304 if(!strcmp(cf->path, path)) {
305 if(now - cf->lastck > 5) {
306 cf->lastck = now;
307 if(stat(fn, &sb) || (sb.st_mtime != cf->mtime))
308 break;
309 }
310 return(cf);
311 }
312 }
313 ocf = cf;
314 if(access(fn, R_OK) || stat(fn, &sb)) {
315 cf = emptyconfig();
316 mtime = 0;
317 } else {
318 if((cf = readconfig(fn)) == NULL)
319 return(NULL);
320 mtime = sb.st_mtime;
321 }
322 if(ocf != NULL) {
323 mergechildren(cf->children, ocf->children);
324 freeconfig(ocf);
325 }
326 cf->path = sstrdup(path);
327 cf->mtime = mtime;
328 cf->lastck = now;
329 cf->next = cflist;
330 cf->prev = NULL;
331 if(cflist != NULL)
332 cflist->prev = cf;
333 cflist = cf;
334 return(cf);
335}
336
337struct config **getconfigs(char *file)
338{
339 static struct config **ret = NULL;
340 struct {
341 struct config **b;
342 size_t s, d;
343 } buf;
344 struct config *cf;
345 char *tmp, *p;
346
347 if(ret != NULL)
348 free(ret);
349 bufinit(buf);
350 if(!strncmp(file, "./", 2))
351 file += 2;
352 tmp = sstrdup(file);
353 while(1) {
354 if((p = strrchr(tmp, '/')) == NULL)
355 break;
356 *p = 0;
357 if((cf = getconfig(tmp)) != NULL)
358 bufadd(buf, cf);
359 }
360 free(tmp);
361 if((cf = getconfig(".")) != NULL)
362 bufadd(buf, cf);
363 if(lconfig != NULL)
364 bufadd(buf, lconfig);
365 if(gconfig != NULL)
366 bufadd(buf, gconfig);
367 bufadd(buf, NULL);
368 return(ret = buf.b);
369}
370
371struct child *findchild(char *file, char *name, struct config **cf)
372{
373 int i;
374 struct config **cfs;
375 struct child *ch;
376
377 if(cf != NULL)
378 *cf = NULL;
379 cfs = getconfigs(file);
380 for(i = 0; cfs[i] != NULL; i++) {
381 if((ch = getchild(cfs[i], name)) != NULL) {
382 if(cf != NULL)
383 *cf = cfs[i];
384 return(ch);
385 }
386 }
387 if(!strcmp(name, ".notfound"))
388 return(notfound);
389 return(NULL);
390}
391
392struct pattern *findmatch(char *file, int trydefault, int type)
393{
394 int i, o, c;
395 char *bn, *ln;
396 struct config **cfs;
397 struct pattern *pat;
398 struct rule *rule;
399 size_t pl;
400
401 if((bn = strrchr(file, '/')) != NULL)
402 bn++;
403 else
404 bn = file;
405 cfs = getconfigs(file);
406 for(c = 0; cfs[c] != NULL; c++) {
407 if(cfs[c]->path == NULL) {
408 ln = file;
409 } else {
410 pl = strlen(cfs[c]->path);
411 if((strlen(file) > pl) && !strncmp(file, cfs[c]->path, pl) && (file[pl] == '/'))
412 ln = file + pl + 1;
413 else
414 ln = file; /* This should only happen in the base directory. */
415 }
416 for(pat = cfs[c]->patterns; pat != NULL; pat = pat->next) {
417 if(pat->type != type)
418 continue;
419 for(i = 0; (rule = pat->rules[i]) != NULL; i++) {
420 if(rule->type == PAT_BASENAME) {
421 for(o = 0; rule->patterns[o] != NULL; o++) {
422 if(!fnmatch(rule->patterns[o], bn, 0))
423 break;
424 }
425 if(rule->patterns[o] == NULL)
426 break;
427 } else if(rule->type == PAT_PATHNAME) {
428 for(o = 0; rule->patterns[o] != NULL; o++) {
429 if(!fnmatch(rule->patterns[o], ln, FNM_PATHNAME))
430 break;
431 }
432 if(rule->patterns[o] == NULL)
433 break;
434 } else if(rule->type == PAT_ALL) {
435 } else if(rule->type == PAT_DEFAULT) {
436 if(!trydefault)
437 break;
438 } else if(rule->type == PAT_LOCAL) {
439 if(strchr(ln, '/'))
440 break;
441 }
442 }
443 if(!rule)
444 return(pat);
445 }
446 }
447 if(!trydefault)
448 return(findmatch(file, 1, type));
449 return(NULL);
450}
451
452static int donotfound(struct child *ch, struct hthead *req, int fd, void (*chinit)(void *), void *idata)
453{
454 simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
455 return(0);
456}
457
458static struct chandler i_notfound = {
459 .handle = donotfound,
460};
461
462static struct child s_notfound = {
463 .name = ".notfound",
464 .iface = &i_notfound,
465};
466struct child *notfound = &s_notfound;