2 ashd - A Sane HTTP Daemon
3 Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
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.
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.
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/>.
41 #define PAT_BASENAME 0
42 #define PAT_PATHNAME 1
47 struct config *next, *prev;
50 struct child *children;
51 struct pattern *patterns;
66 static struct config *cflist;
67 static struct config *gconfig, *lconfig;
70 static void freepattern(struct pattern *pat)
74 for(rule = pat->rules; *rule; rule++) {
75 if((*rule)->pattern != NULL)
76 free((*rule)->pattern);
79 if(pat->childnm != NULL)
85 static void freeconfig(struct config *cf)
87 struct child *ch, *nch;
88 struct pattern *pat, *npat;
91 cf->prev->next = cf->next;
93 cf->next->prev = cf->prev;
98 for(ch = cf->children; ch != NULL; ch = nch) {
102 for(pat = cf->patterns; pat != NULL; pat = npat) {
109 static struct child *getchild(struct config *cf, char *name)
113 for(ch = cf->children; ch; ch = ch->next) {
114 if(!strcmp(ch->name, name))
120 static struct rule *newrule(struct pattern *pat)
125 for(i = 0; pat->rules[i]; i++);
126 pat->rules = srealloc(pat->rules, sizeof(*pat->rules) * (i + 2));
127 rule = pat->rules[i] = szmalloc(sizeof(*rule));
128 pat->rules[i + 1] = NULL;
132 static struct pattern *newpattern(void)
137 pat->rules = szmalloc(sizeof(*pat->rules));
141 static struct pattern *parsepattern(struct cfstate *s)
147 if(!strcmp(s->argv[0], "match")) {
157 if(!strcmp(s->argv[0], "filename")) {
159 flog(LOG_WARNING, "%s:%i: missing pattern for `filename' match", s->file, s->lno);
163 rule->type = PAT_BASENAME;
164 rule->pattern = sstrdup(s->argv[1]);
165 } else if(!strcmp(s->argv[0], "pathname")) {
167 flog(LOG_WARNING, "%s:%i: missing pattern for `pathname' match", s->file, s->lno);
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")) {
179 flog(LOG_WARNING, "%s:%i: missing child name for `handler' directive", s->file, s->lno);
182 if(pat->childnm != NULL)
184 pat->childnm = sstrdup(s->argv[1]);
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]);
190 } else if(!strcmp(s->argv[0], "end") || !strcmp(s->argv[0], "eof")) {
193 flog(LOG_WARNING, "%s:%i: unknown directive `%s' in pattern declaration", s->file, s->lno, s->argv[0]);
197 if(pat->rules[0] == NULL) {
198 flog(LOG_WARNING, "%s:%i: missing rules in match declaration", s->file, sl);
202 if((pat->childnm == NULL) && (pat->fchild == NULL)) {
203 flog(LOG_WARNING, "%s:%i: missing handler in match declaration", s->file, sl);
210 static struct config *emptyconfig(void)
218 static struct config *readconfig(char *file)
226 if((in = fopen(file, "r")) == NULL) {
227 flog(LOG_WARNING, "%s: %s", file, strerror(errno));
230 s = mkcfparser(in, file);
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;
241 } else if(!strcmp(s->argv[0], "eof")) {
244 flog(LOG_WARNING, "%s:%i: unknown directive `%s'", s->file, s->lno, s->argv[0]);
253 static struct config *getconfig(char *path)
260 fn = sprintf3("%s/.htrc", path);
261 for(cf = cflist; cf != NULL; cf = cf->next) {
262 if(!strcmp(cf->path, path)) {
263 if(now - cf->lastck > 5) {
264 if(stat(fn, &sb) || (sb.st_mtime != cf->mtime)) {
273 if(access(fn, R_OK) || stat(fn, &sb)) {
277 if((cf = readconfig(fn)) == NULL)
281 cf->path = sstrdup(path);
289 static struct config **getconfigs(char *file)
291 static struct config **ret = NULL;
304 if((p = strrchr(tmp, '/')) == NULL)
307 if((cf = getconfig(tmp)) != NULL)
311 if((cf = getconfig(".")) != NULL)
314 bufadd(buf, lconfig);
316 bufadd(buf, gconfig);
321 static struct child *findchild(char *file, char *name)
327 cfs = getconfigs(file);
328 for(i = 0; cfs[i] != NULL; i++) {
329 if((ch = getchild(cfs[i], name)) != NULL)
335 static struct pattern *findmatch(char *file, int trydefault)
343 if((bn = strrchr(file, '/')) != NULL)
347 cfs = getconfigs(file);
348 for(c = 0; cfs[c] != NULL; c++) {
349 for(pat = cfs[c]->patterns; pat != NULL; pat = pat->next) {
350 for(i = 0; (rule = pat->rules[i]) != NULL; i++) {
351 if(rule->type == PAT_BASENAME) {
352 if(fnmatch(rule->pattern, bn, 0))
354 } else if(rule->type == PAT_PATHNAME) {
355 if(fnmatch(rule->pattern, file, FNM_PATHNAME))
357 } else if(rule->type == PAT_ALL) {
358 } else if(rule->type == PAT_DEFAULT) {
370 static void handlefile(struct hthead *req, int fd, char *path)
375 headappheader(req, "X-Ash-File", path);
376 if(((pat = findmatch(path, 0)) == NULL) && ((pat = findmatch(path, 1)) == NULL)) {
377 simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
381 stdforkserve(pat->fchild, req, fd);
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);
388 if(childhandle(ch, req, fd))
389 simpleerror(fd, 500, "Server Error", "The request handler crashed.");
393 static void handledir(struct hthead *req, int fd, char *path)
396 simpleerror(fd, 403, "Not Authorized", "Will not send directory listings or indices yet.");
399 static int checkdir(struct hthead *req, int fd, char *path)
404 static void serve(struct hthead *req, int fd)
406 char *p, *p2, *path, *tmp, *buf, *p3, *nm;
416 if((p2 = strchr(p, '/')) == NULL) {
423 if(stat(path, &sb)) {
424 flog(LOG_WARNING, "failed to stat previously stated directory %s: %s", path, strerror(errno));
425 simpleerror(fd, 500, "Internal Server Error", "The server encountered an unexpected condition.");
430 simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
435 simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
442 * First, check the name verbatimely:
444 buf = sprintf3("%s/%s", path, p);
445 if(!stat(buf, &sb)) {
446 if(S_ISDIR(sb.st_mode)) {
448 if(!strcmp(path, "."))
451 path = sprintf2("%s/%s", path, p);
454 stdredir(req, fd, 301, sprintf3("%s/", p));
457 if(checkdir(req, fd, path))
461 if(S_ISREG(sb.st_mode)) {
463 path = sprintf2("%s/%s", path, p);
467 simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
472 * Check the file extensionlessly:
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)
479 if(strcmp(dent->d_name, p))
483 if(!S_ISREG(sb.st_mode))
495 simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
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);
514 simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
520 /* No special handling, for now at least. */
525 static void usage(FILE *out)
527 fprintf(out, "usage: dirplex [-hN] [-c CONFIG] DIR\n");
530 int main(int argc, char **argv)
540 while((c = getopt(argc, argv, "hNc:")) >= 0) {
556 if(argc - optind < 1) {
561 if((gcf = findstdconf("ashd/dirplex.rc")) != NULL) {
562 gconfig = readconfig(gcf);
567 if((lconfig = readconfig(lcf)) == NULL)
570 if(chdir(argv[optind])) {
571 flog(LOG_ERR, "could not change directory to %s: %s", argv[optind], strerror(errno));
574 signal(SIGCHLD, SIG_IGN);
576 if((fd = recvreq(0, &req)) < 0) {
578 flog(LOG_ERR, "recvreq: %s", strerror(errno));