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/>.
29 #include <sys/signal.h>
45 static void chinit(void *idata)
50 /* This should never be able to fail other than for critical
51 * I/O errors or some such, since the path has already been
58 static void handle(struct hthead *req, int fd, char *path, struct pattern *pat)
65 headappheader(req, "X-Ash-File", path);
66 stdforkserve(pat->fchild, req, fd, NULL, NULL);
68 if((ch = findchild(path, pat->childnm, &ccf)) == NULL) {
69 flog(LOG_ERR, "child %s requested, but was not declared", pat->childnm);
70 simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", pat->childnm);
73 if((twd = ccf?ccf->path:NULL) != NULL) {
74 if(!strcmp(twd, ".")) {
76 } else if(strncmp(path, twd, strlen(twd)) || (path[strlen(twd)] != '/')) {
77 /* Should be an impossible case under the current (and
78 * foreseeable) scheme. */
79 simpleerror(fd, 500, "Server Error", "An internal server error occurred.");
82 path = path + strlen(twd) + 1;
85 headappheader(req, "X-Ash-File", path);
86 if(childhandle(ch, req, fd, chinit, twd))
87 simpleerror(fd, 500, "Server Error", "The request handler crashed.");
91 static void handle404(struct hthead *req, int fd, char *path)
98 ch = findchild(tmp, ".notfound", &ccf);
99 if(childhandle(ch, req, fd, chinit, ccf?ccf->path:NULL))
100 simpleerror(fd, 500, "Server Error", "The request handler crashed.");
104 static void handlefile(struct hthead *req, int fd, char *path)
108 if((pat = findmatch(path, 0, 0)) == NULL) {
109 handle404(req, fd, path);
112 handle(req, fd, path, pat);
115 static char *findfile(char *path, char *name, struct stat *sb)
124 if((dir = opendir(path)) == NULL)
127 while((dent = readdir(dir)) != NULL) {
128 /* Ignore backup files.
129 * XXX: There is probably a better and more extensible way to
131 if(dent->d_name[strlen(dent->d_name) - 1] == '~')
133 if((p = strchr(dent->d_name, '.')) == NULL)
135 if(p - dent->d_name != strlen(name))
137 if(strncmp(dent->d_name, name, strlen(name)))
139 fp = sprintf3("%s/%s", path, dent->d_name);
142 if(!S_ISREG(sb->st_mode))
151 static void handledir(struct hthead *req, int fd, char *path)
156 char *inm, *ipath, *cpath;
159 cpath = sprintf2("%s/", path);
160 cfs = getconfigs(cpath);
161 for(i = 0; cfs[i] != NULL; i++) {
162 if(cfs[i]->index != NULL) {
163 for(o = 0; cfs[i]->index[o] != NULL; o++) {
164 inm = cfs[i]->index[o];
165 ipath = sprintf2("%s/%s", path, inm);
166 if(!stat(ipath, &sb) && S_ISREG(sb.st_mode)) {
167 handlefile(req, fd, ipath);
173 if(!strchr(inm, '.') && ((ipath = findfile(path, inm, NULL)) != NULL)) {
174 handlefile(req, fd, ipath);
182 if((pat = findmatch(cpath, 0, 1)) != NULL) {
183 handle(req, fd, cpath, pat);
186 simpleerror(fd, 403, "Not Authorized", "Will not send listings for this directory.");
192 static int checkpath(struct hthead *req, int fd, char *path, char *rest);
194 static int checkentry(struct hthead *req, int fd, char *path, char *rest, char *el)
201 handle404(req, fd, sprintf3("%s/", path));
204 if(!stat(sprintf3("%s/%s", path, el), &sb)) {
205 if(S_ISDIR(sb.st_mode)) {
207 stdredir(req, fd, 301, sprintf3("%s/", el));
210 newpath = sprintf2("%s/%s", path, el);
211 rv = checkpath(req, fd, newpath, rest + 1);
214 } else if(S_ISREG(sb.st_mode)) {
215 newpath = sprintf2("%s/%s", path, el);
217 handlefile(req, fd, newpath);
221 handle404(req, fd, sprintf3("%s/", path));
224 if(!strchr(el, '.') && ((newpath = findfile(path, el, NULL)) != NULL)) {
226 handlefile(req, fd, newpath);
233 static int checkdir(struct hthead *req, int fd, char *path, char *rest)
236 struct config *cf, *ccf;
239 cf = getconfig(path);
240 if(cf->capture != NULL) {
241 cpath = sprintf2("%s/", path);
242 if((ch = findchild(cpath, cf->capture, &ccf)) == NULL) {
244 flog(LOG_ERR, "child %s requested for capture, but was not declared", cf->capture);
245 simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", cf->capture);
252 if(childhandle(ch, req, fd, chinit, ccf?ccf->path:NULL))
253 simpleerror(fd, 500, "Server Error", "The request handler crashed.");
259 static int checkpath(struct hthead *req, int fd, char *path, char *rest)
267 if(!strncmp(path, "./", 2))
269 if(checkdir(req, fd, path, rest))
272 if((p = strchr(rest, '/')) == NULL) {
273 el = unquoteurl(rest);
276 char buf[p - rest + 1];
277 memcpy(buf, rest, p - rest);
279 el = unquoteurl(buf);
283 simpleerror(fd, 400, "Bad Request", "The requested URL contains an invalid escape sequence.");
287 if(strchr(el, '/') || (!*el && *rest)) {
288 handle404(req, fd, sprintf3("%s/", path));
294 handledir(req, fd, path);
298 rv = checkentry(req, fd, path, rest, el);
306 static void serve(struct hthead *req, int fd)
309 if(!checkpath(req, fd, ".", req->rest))
310 handle404(req, fd, ".");
313 static void chldhandler(int sig)
318 pid = waitpid(-1, NULL, WNOHANG);
322 static void sighandler(int sig)
326 static void usage(FILE *out)
328 fprintf(out, "usage: dirplex [-hN] [-c CONFIG] DIR\n");
331 int main(int argc, char **argv)
335 char *gcf, *lcf, *clcf;
341 while((c = getopt(argc, argv, "hNc:")) >= 0) {
357 if(argc - optind < 1) {
362 if((gcf = findstdconf("ashd/dirplex.rc")) != NULL) {
363 gconfig = readconfig(gcf);
368 if(strchr(lcf, '/') == NULL) {
369 if((clcf = findstdconf(sprintf3("ashd/%s", lcf))) == NULL) {
370 flog(LOG_ERR, "could not find requested configuration `%s'", lcf);
373 if((lconfig = readconfig(clcf)) == NULL)
377 if((lconfig = readconfig(lcf)) == NULL)
381 if(chdir(argv[optind])) {
382 flog(LOG_ERR, "could not change directory to %s: %s", argv[optind], strerror(errno));
385 signal(SIGCHLD, chldhandler);
386 signal(SIGPIPE, sighandler);
388 if((fd = recvreq(0, &req)) < 0) {
390 flog(LOG_ERR, "recvreq: %s", strerror(errno));