+++ /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>
-#include <time.h>
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include <utils.h>
-#include <mt.h>
-#include <log.h>
-#include <req.h>
-#include <proc.h>
-#include <resp.h>
-#include <cf.h>
-
-#define PAT_BASENAME 0
-#define PAT_PATHNAME 1
-#define PAT_ALL 2
-#define PAT_DEFAULT 3
-
-#define PT_FILE 0
-#define PT_DIR 1
-
-struct config {
- struct config *next, *prev;
- char *path;
- time_t mtime, lastck;
- struct child *children;
- struct pattern *patterns;
- char **index;
-};
-
-struct rule {
- int type;
- char **patterns;
-};
-
-struct pattern {
- struct pattern *next;
- int type;
- char *childnm;
- char **fchild;
- struct rule **rules;
-};
-
-static struct config *cflist;
-static struct config *gconfig, *lconfig;
-static time_t now;
-
-static void freerule(struct rule *rule)
-{
- freeca(rule->patterns);
- free(rule);
-}
-
-static void freepattern(struct pattern *pat)
-{
- struct rule **rule;
-
- for(rule = pat->rules; *rule; rule++)
- freerule(*rule);
- if(pat->childnm != NULL)
- free(pat->childnm);
- freeca(pat->fchild);
- 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;
- if(cf->path != NULL)
- 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);
- }
- freeca(cf->index);
- free(cf);
-}
-
-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] = szmalloc(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 char **cadup(char **w)
-{
- char **ret;
- int i, l;
-
- l = calen(w);
- ret = smalloc(sizeof(*ret) * (l + 1));
- for(i = 0; i < l; i++)
- ret[i] = sstrdup(w[i]);
- ret[i] = NULL;
- return(ret);
-}
-
-static struct pattern *parsepattern(struct cfstate *s)
-{
- struct pattern *pat;
- struct rule *rule;
- int sl;
-
- if(!strcmp(s->argv[0], "match")) {
- s->expstart = 1;
- pat = newpattern();
- } else {
- return(NULL);
- }
-
- if((s->argc > 1) && !strcmp(s->argv[1], "directory"))
- pat->type = PT_DIR;
- sl = s->lno;
- while(1) {
- getcfline(s);
- if(!strcmp(s->argv[0], "filename")) {
- if(s->argc < 2) {
- flog(LOG_WARNING, "%s:%i: missing pattern for `filename' match", s->file, s->lno);
- continue;
- }
- rule = newrule(pat);
- rule->type = PAT_BASENAME;
- rule->patterns = cadup(s->argv + 1);
- } else if(!strcmp(s->argv[0], "pathname")) {
- if(s->argc < 2) {
- flog(LOG_WARNING, "%s:%i: missing pattern for `pathname' match", s->file, s->lno);
- continue;
- }
- rule = newrule(pat);
- rule->type = PAT_PATHNAME;
- rule->patterns = cadup(s->argv + 1);
- } else if(!strcmp(s->argv[0], "all")) {
- newrule(pat)->type = PAT_ALL;
- } else if(!strcmp(s->argv[0], "default")) {
- newrule(pat)->type = PAT_DEFAULT;
- } else if(!strcmp(s->argv[0], "handler")) {
- if(s->argc < 2) {
- flog(LOG_WARNING, "%s:%i: missing child name for `handler' directive", s->file, s->lno);
- continue;
- }
- if(pat->childnm != NULL)
- free(pat->childnm);
- pat->childnm = sstrdup(s->argv[1]);
- } else if(!strcmp(s->argv[0], "fork")) {
- pat->fchild = cadup(s->argv + 1);
- } else if(!strcmp(s->argv[0], "end") || !strcmp(s->argv[0], "eof")) {
- break;
- } else {
- flog(LOG_WARNING, "%s:%i: unknown directive `%s' in pattern declaration", s->file, s->lno, s->argv[0]);
- }
- }
-
- if(pat->rules[0] == NULL) {
- flog(LOG_WARNING, "%s:%i: missing rules in match declaration", s->file, sl);
- freepattern(pat);
- return(NULL);
- }
- if((pat->childnm == NULL) && (pat->fchild == NULL)) {
- flog(LOG_WARNING, "%s:%i: missing handler in match declaration", s->file, sl);
- freepattern(pat);
- return(NULL);
- }
- return(pat);
-}
-
-static struct config *emptyconfig(void)
-{
- struct config *cf;
-
- omalloc(cf);
- return(cf);
-}
-
-static struct config *readconfig(char *file)
-{
- struct cfstate *s;
- FILE *in;
- struct config *cf;
- struct child *child;
- struct pattern *pat;
-
- if((in = fopen(file, "r")) == NULL) {
- flog(LOG_WARNING, "%s: %s", file, strerror(errno));
- return(NULL);
- }
- s = mkcfparser(in, file);
- cf = emptyconfig();
-
- while(1) {
- getcfline(s);
- if((child = parsechild(s)) != NULL) {
- child->next = cf->children;
- cf->children = child;
- } else if((pat = parsepattern(s)) != NULL) {
- pat->next = cf->patterns;
- cf->patterns = pat;
- } else if(!strcmp(s->argv[0], "index-file")) {
- freeca(cf->index);
- cf->index = NULL;
- if(s->argc > 1)
- cf->index = cadup(s->argv + 1);
- } else if(!strcmp(s->argv[0], "eof")) {
- break;
- } else {
- flog(LOG_WARNING, "%s:%i: unknown directive `%s'", s->file, s->lno, s->argv[0]);
- }
- }
-
- freecfparser(s);
- fclose(in);
- return(cf);
-}
-
-static struct config *getconfig(char *path)
-{
- struct config *cf;
- struct stat sb;
- char *fn;
- time_t mtime;
-
- fn = sprintf3("%s/.htrc", path);
- for(cf = cflist; cf != NULL; cf = cf->next) {
- if(!strcmp(cf->path, path)) {
- if(now - cf->lastck > 5) {
- if(stat(fn, &sb) || (sb.st_mtime != cf->mtime)) {
- freeconfig(cf);
- break;
- }
- }
- cf->lastck = now;
- return(cf);
- }
- }
- if(access(fn, R_OK) || stat(fn, &sb)) {
- cf = emptyconfig();
- mtime = 0;
- } else {
- if((cf = readconfig(fn)) == NULL)
- return(NULL);
- mtime = sb.st_mtime;
- }
- cf->path = sstrdup(path);
- cf->mtime = mtime;
- cf->lastck = now;
- cf->next = cflist;
- cf->prev = NULL;
- if(cflist != NULL)
- cflist->prev = cf;
- cflist = cf;
- return(cf);
-}
-
-static struct config **getconfigs(char *file)
-{
- static struct config **ret = NULL;
- struct {
- struct config **b;
- size_t s, d;
- } buf;
- struct config *cf;
- char *tmp, *p;
-
- if(ret != NULL)
- free(ret);
- bufinit(buf);
- tmp = sstrdup(file);
- while(1) {
- if((p = strrchr(tmp, '/')) == NULL)
- break;
- *p = 0;
- if((cf = getconfig(tmp)) != NULL)
- bufadd(buf, cf);
- }
- free(tmp);
- if((cf = getconfig(".")) != NULL)
- bufadd(buf, cf);
- if(lconfig != NULL)
- bufadd(buf, lconfig);
- if(gconfig != NULL)
- bufadd(buf, gconfig);
- bufadd(buf, NULL);
- return(ret = buf.b);
-}
-
-static struct child *findchild(char *file, char *name)
-{
- int i;
- struct config **cfs;
- struct child *ch;
-
- cfs = getconfigs(file);
- for(i = 0; cfs[i] != NULL; i++) {
- if((ch = getchild(cfs[i], name)) != NULL)
- break;
- }
- return(ch);
-}
-
-static struct pattern *findmatch(char *file, int trydefault, int dir)
-{
- int i, o, c;
- char *bn;
- struct config **cfs;
- struct pattern *pat;
- struct rule *rule;
-
- if((bn = strrchr(file, '/')) != NULL)
- bn++;
- else
- bn = file;
- cfs = getconfigs(file);
- for(c = 0; cfs[c] != NULL; c++) {
- for(pat = cfs[c]->patterns; pat != NULL; pat = pat->next) {
- if(!dir && (pat->type == PT_DIR))
- continue;
- if(dir && (pat->type != PT_DIR))
- continue;
- for(i = 0; (rule = pat->rules[i]) != NULL; i++) {
- if(rule->type == PAT_BASENAME) {
- for(o = 0; rule->patterns[o] != NULL; o++) {
- if(!fnmatch(rule->patterns[o], bn, 0))
- break;
- }
- if(rule->patterns[o] == NULL)
- break;
- } else if(rule->type == PAT_PATHNAME) {
- for(o = 0; rule->patterns[o] != NULL; o++) {
- if(!fnmatch(rule->patterns[o], file, FNM_PATHNAME))
- break;
- }
- if(rule->patterns[o] == NULL)
- break;
- } else if(rule->type == PAT_ALL) {
- } else if(rule->type == PAT_DEFAULT) {
- if(!trydefault)
- break;
- }
- }
- if(!rule)
- return(pat);
- }
- }
- if(!trydefault)
- return(findmatch(file, 1, dir));
- return(NULL);
-}
-
-static void handle(struct hthead *req, int fd, char *path, struct pattern *pat)
-{
- struct child *ch;
-
- headappheader(req, "X-Ash-File", path);
- if(pat->fchild) {
- stdforkserve(pat->fchild, req, fd);
- } else {
- if((ch = findchild(path, pat->childnm)) == NULL) {
- flog(LOG_ERR, "child %s requested, but was not declared", pat->childnm);
- simpleerror(fd, 500, "Configuration Error", "The server is erroneously configured. Handler %s was requested, but not declared.", pat->childnm);
- return;
- }
- if(childhandle(ch, req, fd))
- simpleerror(fd, 500, "Server Error", "The request handler crashed.");
- }
-}
-
-static void handlefile(struct hthead *req, int fd, char *path)
-{
- struct pattern *pat;
-
- if((pat = findmatch(path, 0, 0)) == NULL) {
- simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
- return;
- }
- handle(req, fd, path, pat);
-}
-
-static char *findfile(char *path, char *name, struct stat *sb)
-{
- DIR *dir;
- struct stat sbuf;
- struct dirent *dent;
- char *p, *fp, *ret;
-
- if(sb == NULL)
- sb = &sbuf;
- if((dir = opendir(path)) == NULL)
- return(NULL);
- ret = NULL;
- while((dent = readdir(dir)) != NULL) {
- /* Ignore backup files.
- * XXX: There is probably a better and more extensible way to
- * do this. */
- if(dent->d_name[strlen(dent->d_name) - 1] == '~')
- continue;
- if((p = strchr(dent->d_name, '.')) == NULL)
- continue;
- if(p - dent->d_name != strlen(name))
- continue;
- if(strncmp(dent->d_name, name, strlen(name)))
- continue;
- fp = sprintf3("%s/%s", path, dent->d_name);
- if(stat(fp, sb))
- continue;
- if(!S_ISREG(sb->st_mode))
- continue;
- ret = sstrdup(fp);
- break;
- }
- closedir(dir);
- return(ret);
-}
-
-static void handledir(struct hthead *req, int fd, char *path)
-{
- struct config **cfs;
- int i, o;
- struct stat sb;
- char *inm, *ipath, *cpath;
- struct pattern *pat;
-
- cpath = sprintf2("%s/", path);
- cfs = getconfigs(cpath);
- for(i = 0; cfs[i] != NULL; i++) {
- if(cfs[i]->index != NULL) {
- for(o = 0; cfs[i]->index[o] != NULL; o++) {
- inm = cfs[i]->index[o];
- ipath = sprintf2("%s/%s", path, inm);
- if(!stat(ipath, &sb) && S_ISREG(sb.st_mode)) {
- handlefile(req, fd, ipath);
- free(ipath);
- goto out;
- }
- free(ipath);
-
- if(!strchr(inm, '.') && ((ipath = findfile(path, inm, NULL)) != NULL)) {
- handlefile(req, fd, ipath);
- free(ipath);
- goto out;
- }
- }
- break;
- }
- }
- if((pat = findmatch(cpath, 0, 1)) != NULL) {
- handle(req, fd, cpath, pat);
- goto out;
- }
- simpleerror(fd, 403, "Not Authorized", "Will not send listings for this directory.");
-
-out:
- free(cpath);
-}
-
-static int checkpath(struct hthead *req, int fd, char *path, char *rest);
-
-static int checkentry(struct hthead *req, int fd, char *path, char *rest, char *el)
-{
- struct stat sb;
- char *newpath;
- int rv;
-
- if(!el == '.') {
- simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
- return(1);
- }
- if(!stat(sprintf3("%s/%s", path, el), &sb)) {
- if(S_ISDIR(sb.st_mode)) {
- if(!*rest) {
- stdredir(req, fd, 301, sprintf3("%s/", el));
- return(1);
- }
- newpath = sprintf2("%s/%s", path, el);
- rv = checkpath(req, fd, newpath, rest + 1);
- free(newpath);
- return(rv);
- } else if(S_ISREG(sb.st_mode)) {
- newpath = sprintf2("%s/%s", path, el);
- replrest(req, rest);
- handlefile(req, fd, newpath);
- free(newpath);
- return(1);
- }
- simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
- return(1);
- }
- if(!strchr(el, '.') && ((newpath = findfile(path, el, NULL)) != NULL)) {
- replrest(req, rest);
- handlefile(req, fd, newpath);
- free(newpath);
- return(1);
- }
- return(0);
-}
-
-static int checkpath(struct hthead *req, int fd, char *path, char *rest)
-{
- struct config *cf;
- char *p, *el;
- int rv;
-
- el = NULL;
- rv = 0;
-
- if(!strncmp(path, "./", 2))
- path += 2;
- cf = getconfig(path);
-
- if((p = strchr(rest, '/')) == NULL) {
- el = unquoteurl(rest);
- rest = "";
- } else {
- char buf[p - rest + 1];
- memcpy(buf, rest, p - rest);
- buf[p - rest] = 0;
- el = unquoteurl(buf);
- rest = p;
- }
- if(el == NULL) {
- simpleerror(fd, 400, "Bad Request", "The requested URL contains an invalid escape sequence.");
- rv = 1;
- goto out;
- }
- if(strchr(el, '/') || (!*el && *rest)) {
- simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
- rv = 1;
- goto out;
- }
- if(!*el) {
- replrest(req, rest);
- handledir(req, fd, path);
- return(1);
- }
- rv = checkentry(req, fd, path, rest, el);
-
-out:
- if(el != NULL)
- free(el);
- return(rv);
-}
-
-static void serve(struct hthead *req, int fd)
-{
- now = time(NULL);
- if(!checkpath(req, fd, ".", req->rest))
- simpleerror(fd, 404, "Not Found", "The requested URL has no corresponding resource.");
-}
-
-static void usage(FILE *out)
-{
- fprintf(out, "usage: dirplex [-hN] [-c CONFIG] DIR\n");
-}
-
-int main(int argc, char **argv)
-{
- int c;
- int nodef;
- char *gcf, *lcf, *clcf;
- struct hthead *req;
- int fd;
-
- nodef = 0;
- lcf = NULL;
- while((c = getopt(argc, argv, "hNc:")) >= 0) {
- switch(c) {
- case 'h':
- usage(stdout);
- exit(0);
- case 'N':
- nodef = 1;
- break;
- case 'c':
- lcf = optarg;
- break;
- default:
- usage(stderr);
- exit(1);
- }
- }
- if(argc - optind < 1) {
- usage(stderr);
- exit(1);
- }
- if(!nodef) {
- if((gcf = findstdconf("ashd/dirplex.rc")) != NULL) {
- gconfig = readconfig(gcf);
- free(gcf);
- }
- }
- if(lcf != NULL) {
- if(strchr(lcf, '/') == NULL) {
- if((clcf = findstdconf(sprintf3("ashd/%s", lcf))) == NULL) {
- flog(LOG_ERR, "could not find requested configuration `%s'", lcf);
- exit(1);
- }
- if((lconfig = readconfig(clcf)) == NULL)
- exit(1);
- free(clcf);
- } else {
- if((lconfig = readconfig(lcf)) == NULL)
- exit(1);
- }
- }
- if(chdir(argv[optind])) {
- flog(LOG_ERR, "could not change directory to %s: %s", argv[optind], 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 / blobdiff