--- /dev/null
+/*
+ ashd - A Sane HTTP Daemon
+ Copyright (C) 2008 Fredrik Tolf <fredrik@dolda2000.com>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#include <dirent.h>
+#include <fnmatch.h>
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <utils.h>
+#include <mt.h>
+#include <log.h>
+#include <req.h>
+#include <proc.h>
+
+#define CH_SOCKET 0
+#define CH_FORK 1
+
+#define PAT_BASENAME 0
+#define PAT_PATHNAME 1
+#define PAT_ALL 2
+#define PAT_DEFAULT 3
+
+struct config {
+ struct config *next, *prev;
+ char *path;
+ time_t mtime;
+ struct child *children;
+ struct pattern *patterns;
+};
+
+struct child {
+ struct child *next;
+ char *name;
+ int type;
+ char **argv;
+ int fd;
+};
+
+struct rule {
+ int type;
+ char *pattern;
+};
+
+struct pattern {
+ struct pattern *next;
+ char *childnm;
+ struct rule **rules;
+};
+
+struct config *cflist;
+
+static void freechild(struct child *ch)
+{
+ if(ch->fd != -1)
+ close(ch->fd);
+ if(ch->name != NULL)
+ free(ch->name);
+ if(ch->argv != NULL)
+ freeca(ch->argv);
+ free(ch);
+}
+
+static void freepattern(struct pattern *pat)
+{
+ struct rule **rule;
+
+ for(rule = pat->rules; *rule; rule++) {
+ if((*rule)->pattern != NULL)
+ free((*rule)->pattern);
+ free(*rule);
+ }
+ if(pat->childnm != NULL)
+ free(pat->childnm);
+ free(pat);
+}
+
+static void freeconfig(struct config *cf)
+{
+ struct child *ch, *nch;
+ struct pattern *pat, *npat;
+
+ if(cf->prev != NULL)
+ cf->prev->next = cf->next;
+ if(cf->next != NULL)
+ cf->next->prev = cf->prev;
+ if(cf == cflist)
+ cflist = cf->next;
+ free(cf->path);
+ for(ch = cf->children; ch != NULL; ch = nch) {
+ nch = ch->next;
+ freechild(ch);
+ }
+ for(pat = cf->patterns; pat != NULL; pat = npat) {
+ npat = pat->next;
+ freepattern(pat);
+ }
+ free(cf);
+}
+
+static struct child *newchild(char *name, int type)
+{
+ struct child *ch;
+
+ omalloc(ch);
+ ch->name = sstrdup(name);
+ ch->type = type;
+ ch->fd = -1;
+ return(ch);
+}
+
+static struct child *getchild(struct config *cf, char *name)
+{
+ struct child *ch;
+
+ for(ch = cf->children; ch; ch = ch->next) {
+ if(!strcmp(ch->name, name))
+ break;
+ }
+ return(ch);
+}
+
+static struct rule *newrule(struct pattern *pat)
+{
+ int i;
+ struct rule *rule;
+
+ for(i = 0; pat->rules[i]; i++);
+ pat->rules = srealloc(pat->rules, sizeof(*pat->rules) * (i + 2));
+ rule = pat->rules[i] = smalloc(sizeof(*rule));
+ pat->rules[i + 1] = NULL;
+ return(rule);
+}
+
+static struct pattern *newpattern(void)
+{
+ struct pattern *pat;
+
+ omalloc(pat);
+ pat->rules = szmalloc(sizeof(*pat->rules));
+ return(pat);
+}
+
+static struct config *readconfig(char *path)
+{
+ int i;
+ struct config *cf;
+ FILE *s;
+ char line[1024];
+ char *p, **w;
+ int ind, eof;
+ int lno;
+ int state;
+ int rv;
+ int argc;
+ struct child *child;
+ struct pattern *pat;
+ struct rule *rule;
+ struct stat sb;
+
+ if(stat(path, &sb))
+ return(NULL);
+ if((s = fopen(sprintf3("%s/.htrc", path), "r")) == NULL)
+ return(NULL);
+ omalloc(cf);
+ cf->mtime = sb.st_mtime;
+ cf->path = sstrdup(path);
+ eof = 0;
+ state = 0;
+ w = NULL;
+ lno = 0;
+ do {
+ if(fgets(line, sizeof(line), s) == NULL) {
+ eof = 1;
+ line[0] = 0;
+ }
+ lno++;
+ for(p = line; *p; p++) {
+ if(*p == '#')
+ continue;
+ if(!isspace(*p))
+ break;
+ }
+ ind = isspace(line[0]);
+ w = tokenize(line);
+ argc = calen(w);
+
+ retry:
+ if(state == 0) {
+ if(ind) {
+ flog(LOG_WARNING, "%s%i: unexpected line indentation in global scope", path, lno);
+ goto next;
+ } else {
+ if(!w[0]) {
+ } else if(!strcmp(w[0], "child")) {
+ if(argc < 2) {
+ flog(LOG_WARNING, "%s:%i: missing name in child declaration", path, lno);
+ goto next;
+ }
+ child = newchild(w[1], CH_SOCKET);
+ state = 1;
+ } else if(!strcmp(w[0], "fchild")) {
+ if(argc < 2) {
+ flog(LOG_WARNING, "%s:%i: missing name in child declaration", path, lno);
+ goto next;
+ }
+ child = newchild(w[1], CH_FORK);
+ state = 1;
+ } else if(!strcmp(w[0], "match")) {
+ pat = newpattern();
+ state = 2;
+ } else {
+ flog(LOG_WARNING, "%s:%i: unknown directive %s", path, lno, w[0]);
+ }
+ }
+ } else if(state == 1) {
+ if(ind) {
+ if(!w[0]) {
+ } else if(!strcmp(w[0], "exec")) {
+ if(argc < 2) {
+ flog(LOG_WARNING, "%s:%i: too few parameters to `exec'", path, lno);
+ goto next;
+ }
+ child->argv = szmalloc(sizeof(*child->argv) * argc);
+ for(i = 0; i < argc - 1; i++)
+ child->argv[i] = sstrdup(w[i + 1]);
+ } else {
+ flog(LOG_WARNING, "%s:%i: unknown directive %s", path, lno, w[0]);
+ }
+ } else {
+ state = 0;
+ if(child->argv == NULL) {
+ flog(LOG_WARNING, "%s:%i: missing `exec' in child declaration %s", path, lno, child->name);
+ freechild(child);
+ goto retry;
+ }
+ child->next = cf->children;
+ cf->children = child;
+ goto retry;
+ }
+ } else if(state == 2) {
+ if(ind) {
+ if(!w[0]) {
+ } else if(!strcmp(w[0], "filename")) {
+ if(argc < 2) {
+ flog(LOG_WARNING, "%s:%i: missing pattern for `filename' match", path, lno);
+ goto next;
+ }
+ rule = newrule(pat);
+ rule->type = PAT_BASENAME;
+ rule->pattern = sstrdup(w[1]);
+ } else if(!strcmp(w[0], "pathname")) {
+ if(argc < 2) {
+ flog(LOG_WARNING, "%s:%i: missing pattern for `pathname' match", path, lno);
+ goto next;
+ }
+ rule = newrule(pat);
+ rule->type = PAT_PATHNAME;
+ rule->pattern = sstrdup(w[1]);
+ } else if(!strcmp(w[0], "all")) {
+ newrule(pat)->type = PAT_ALL;
+ } else if(!strcmp(w[0], "default")) {
+ newrule(pat)->type = PAT_DEFAULT;
+ } else if(!strcmp(w[0], "handler")) {
+ if(argc < 2) {
+ flog(LOG_WARNING, "%s:%i: missing child name for `handler' directive", path, lno);
+ goto next;
+ }
+ if(pat->childnm != NULL)
+ free(pat->childnm);
+ pat->childnm = sstrdup(w[1]);
+ } else {
+ flog(LOG_WARNING, "%s:%i: unknown directive %s", path, lno, w[0]);
+ }
+ } else {
+ state = 0;
+ if(pat->rules[0] == NULL) {
+ flog(LOG_WARNING, "%s:%i: missing rules in match declaration", path, lno);
+ freepattern(pat);
+ goto retry;
+ }
+ if(pat->childnm == NULL) {
+ flog(LOG_WARNING, "%s:%i: missing handler in match declaration", path, lno);
+ freepattern(pat);
+ goto retry;
+ }
+ pat->next = cf->patterns;
+ cf->patterns = pat;
+ goto retry;
+ }
+ }
+
+ next:
+ freeca(w);
+ w = NULL;
+ } while(!eof);
+ rv = 0;
+
+ if(w != NULL)
+ freeca(w);
+ fclose(s);
+ return(cf);
+}
+
+static struct config *getconfig(char *path)
+{
+ struct config *cf;
+ struct stat sb;
+
+ for(cf = cflist; cf != NULL; cf = cf->next) {
+ if(!strcmp(cf->path, path)) {
+ if(stat(path, &sb))
+ return(NULL);
+ if(sb.st_mtime != cf->mtime) {
+ freeconfig(cf);
+ break;
+ }
+ return(cf);
+ }
+ }
+ if((cf = readconfig(path)) != NULL) {
+ cf->next = cflist;
+ cflist = cf;
+ }
+ return(cf);
+}
+
+static char *findfile(struct hthead *req, char *nm)
+{
+ char *p, *p2, *path, *ftmp, *buf, *rv, *p3;
+ struct stat sb;
+ DIR *dir;
+ struct dirent *dent;
+
+ path = sstrdup(".");
+ p = nm;
+ rv = NULL;
+ while(1) {
+ if((p2 = strchr(p, '/')) == NULL) {
+ } else {
+ *(p2++) = 0;
+ }
+
+ if(!*p) {
+ if(p2 == NULL) {
+ rv = sstrdup(path);
+ break;
+ } else {
+ goto fail;
+ }
+ }
+ if(*p == '.')
+ goto fail;
+
+ getconfig(path);
+
+ /*
+ * First, check the name verbatimely:
+ */
+ buf = sprintf3("%s/%s", path, p);
+ if(!stat(buf, &sb)) {
+ if(S_ISDIR(sb.st_mode)) {
+ ftmp = path;
+ if(!strcmp(path, "."))
+ path = sstrdup(p);
+ else
+ path = sprintf2("%s/%s", path, p);
+ free(ftmp);
+ goto next;
+ }
+ if(S_ISREG(sb.st_mode)) {
+ rv = sstrdup(buf);
+ break;
+ }
+ goto fail;
+ }
+
+ /*
+ * Check the file extensionlessly:
+ */
+ if(!strchr(p, '.') && ((dir = opendir(path)) != NULL)) {
+ while((dent = readdir(dir)) != NULL) {
+ buf = sprintf3("%s/%s", path, dent->d_name);
+ if((p3 = strchr(dent->d_name, '.')) != NULL)
+ *p3 = 0;
+ if(strcmp(dent->d_name, p))
+ continue;
+ if(stat(buf, &sb))
+ continue;
+ if(!S_ISREG(sb.st_mode))
+ continue;
+ rv = sstrdup(buf);
+ break;
+ }
+ closedir(dir);
+ if(dent != NULL)
+ break;
+ }
+
+ goto fail;
+
+ next:
+ if(p2 == NULL)
+ break;
+ p = p2;
+ }
+ if(!strncmp(rv, "./", 2))
+ memmove(rv, rv + 2, strlen(rv + 2) + 1);
+ goto out;
+
+fail:
+ rv = NULL;
+out:
+ free(path);
+ return(rv);
+}
+
+static struct child *findchild(char *file, char *name)
+{
+ char *buf, *p;
+ struct config *cf;
+ struct child *ch;
+
+ buf = sstrdup(file);
+ while(1) {
+ ch = NULL;
+ if(!strcmp(buf, "."))
+ break;
+ if((p = strrchr(buf, '/')) != NULL)
+ *p = 0;
+ else
+ strcpy(buf, ".");
+ cf = getconfig(buf);
+ if(cf == NULL)
+ continue;
+ if((ch = getchild(cf, name)) != NULL)
+ break;
+ }
+ free(buf);
+ return(ch);
+}
+
+static struct pattern *findmatch(char *file, int trydefault)
+{
+ int i;
+ char *buf, *p, *bn;
+ struct config *cf;
+ struct pattern *pat;
+ struct rule *rule;
+
+ if((bn = strrchr(file, '/')) != NULL)
+ bn++;
+ else
+ bn = file;
+ buf = sstrdup(file);
+ while(1) {
+ pat = NULL;
+ if(!strcmp(buf, "."))
+ break;
+ if((p = strrchr(buf, '/')) != NULL)
+ *p = 0;
+ else
+ strcpy(buf, ".");
+ cf = getconfig(buf);
+ if(cf == NULL)
+ continue;
+ for(pat = cf->patterns; pat != NULL; pat = pat->next) {
+ for(i = 0; (rule = pat->rules[i]) != NULL; i++) {
+ if(rule->type == PAT_BASENAME) {
+ if(fnmatch(rule->pattern, bn, 0))
+ break;
+ } else if(rule->type == PAT_PATHNAME) {
+ if(fnmatch(rule->pattern, file, FNM_PATHNAME))
+ break;
+ } else if(rule->type == PAT_ALL) {
+ } else if(rule->type == PAT_DEFAULT) {
+ if(!trydefault)
+ break;
+ }
+ }
+ if(!rule)
+ goto out;
+ }
+ }
+
+out:
+ free(buf);
+ return(pat);
+}
+
+static void forkchild(struct child *ch)
+{
+ ch->fd = stdmkchild(ch->argv);
+}
+
+static void passreq(struct child *ch, struct hthead *req, int fd)
+{
+ if(ch->fd < 0)
+ forkchild(ch);
+ if(sendreq(ch->fd, req, fd)) {
+ if(errno == EPIPE) {
+ /* Assume that the child has crashed and restart it. */
+ forkchild(ch);
+ if(!sendreq(ch->fd, req, fd))
+ return;
+ }
+ flog(LOG_ERR, "could not pass on request to child %s: %s", ch->name, strerror(errno));
+ close(ch->fd);
+ ch->fd = -1;
+ }
+}
+
+static void serve(struct hthead *req, int fd)
+{
+ char *file;
+ struct stat sb;
+ struct pattern *pat;
+ struct child *ch;
+
+ if((file = findfile(req, req->rest)) == NULL) {
+ /* XXX: Do 404 handling */
+ return;
+ }
+ replrest(req, file);
+ if(stat(file, &sb)) {
+ flog(LOG_ERR, "could not stat previously found file %s: %s", file, strerror(errno));
+ free(file);
+ return;
+ }
+ if(!S_ISREG(sb.st_mode)) {
+ /* XXX: Handle default files or similar stuff. */
+ free(file);
+ return;
+ }
+ if(((pat = findmatch(file, 0)) == NULL) && ((pat = findmatch(file, 1)) == NULL)) {
+ /* XXX: Send a 500 error? 404? */
+ free(file);
+ return;
+ }
+ if((ch = findchild(file, pat->childnm)) == NULL) {
+ /* XXX: Send a 500 error. */
+ flog(LOG_ERR, "child %s requested, but was not declared", pat->childnm);
+ free(file);
+ return;
+ }
+
+ if(ch->type == CH_SOCKET) {
+ passreq(ch, req, fd);
+ } else if(ch->type == CH_FORK) {
+ stdforkserve(ch->argv, req, fd);
+ }
+
+ free(file);
+}
+
+int main(int argc, char **argv)
+{
+ struct hthead *req;
+ int fd;
+
+ if(argc < 2) {
+ flog(LOG_ERR, "usage: dirplex DIR");
+ exit(1);
+ }
+ if(chdir(argv[1])) {
+ flog(LOG_ERR, "could not change directory to %s: %s", argv[1], strerror(errno));
+ exit(1);
+ }
+ signal(SIGCHLD, SIG_IGN);
+ while(1) {
+ if((fd = recvreq(0, &req)) < 0) {
+ if(errno != 0)
+ flog(LOG_ERR, "recvreq: %s", strerror(errno));
+ break;
+ }
+ serve(req, fd);
+ freehthead(req);
+ close(fd);
+ }
+ return(0);
+}
Dolda2000 GitWeb / ashd.git / commitdiff