--- /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 <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include <stdint.h>
+#include <time.h>
+#include <magic.h>
+#include <locale.h>
+#include <langinfo.h>
+#include <sys/socket.h>
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <utils.h>
+#include <log.h>
+#include <req.h>
+#include <resp.h>
+#include <mt.h>
+#include <mtio.h>
+
+#ifdef HAVE_XATTR
+#include <attr/xattr.h>
+#endif
+
+static magic_t cookie;
+
+static char *attrmimetype(char *file)
+{
+#ifdef HAVE_XATTR
+ char buf[1024];
+ int i;
+ ssize_t sz;
+
+ if((sz = getxattr(file, "user.ash-mime-type", buf, sizeof(buf) - 1)) > 0)
+ goto found;
+ if((sz = getxattr(file, "user.mime-type", buf, sizeof(buf) - 1)) > 0)
+ goto found;
+ if((sz = getxattr(file, "user.mime_type", buf, sizeof(buf) - 1)) > 0)
+ goto found;
+ if((sz = getxattr(file, "user.Content-Type", buf, sizeof(buf) - 1)) > 0)
+ goto found;
+ return(NULL);
+found:
+ for(i = 0; i < sz; i++) {
+ if((buf[i] < 32) || (buf[i] >= 128))
+ return(NULL);
+ }
+ buf[sz] = 0;
+ return(sstrdup(buf));
+#else
+ return(NULL);
+#endif
+}
+
+static char *getmimetype(char *file, struct stat *sb)
+{
+ char *ret;
+ const char *cret;
+
+ if((ret = attrmimetype(file)) != NULL)
+ return(ret);
+ if((cret = magic_file(cookie, file)) != NULL)
+ return(sstrdup(cret));
+ return(sstrdup("application/octet-stream"));
+}
+
+/* XXX: This could be made far better and check for other attributes
+ * and stuff, but not now. */
+static char *ckctype(char *ctype)
+{
+ char *buf;
+
+ if(!strncmp(ctype, "text/", 5) && (strchr(ctype, ';') == NULL)) {
+ buf = sprintf2("%s; charset=%s", ctype, nl_langinfo(CODESET));
+ free(ctype);
+ return(buf);
+ }
+ return(ctype);
+}
+
+static int checkcache(struct hthead *req, FILE *out, char *file, struct stat *sb)
+{
+ char *hdr;
+
+ if((hdr = getheader(req, "If-Modified-Since")) != NULL) {
+ if(parsehttpdate(hdr) < sb->st_mtime)
+ return(0);
+ fprintf(out, "HTTP/1.1 304 Not Modified\n");
+ fprintf(out, "Date: %s\n", fmthttpdate(time(NULL)));
+ fprintf(out, "Content-Length: 0\n");
+ fprintf(out, "\n");
+ return(1);
+ }
+ return(0);
+}
+
+static off_t passdata(FILE *in, FILE *out, off_t max)
+{
+ size_t read;
+ off_t total;
+ char buf[8192];
+
+ total = 0;
+ while(!feof(in) && ((max < 0) || (total < max))) {
+ read = sizeof(buf);
+ if(max >= 0)
+ read = min(max - total, read);
+ read = fread(buf, 1, read, in);
+ if(ferror(in))
+ return(-1);
+ if(fwrite(buf, 1, read, out) != read)
+ return(-1);
+ total += read;
+ }
+ return(total);
+}
+
+static void sendwhole(struct hthead *req, FILE *out, FILE *sfile, struct stat *sb, char *contype, int head)
+{
+ fprintf(out, "HTTP/1.1 200 OK\n");
+ fprintf(out, "Content-Type: %s\n", contype);
+ fprintf(out, "Content-Length: %ji\n", (intmax_t)sb->st_size);
+ fprintf(out, "Last-Modified: %s\n", fmthttpdate(sb->st_mtime));
+ fprintf(out, "Date: %s\n", fmthttpdate(time(NULL)));
+ fprintf(out, "\n");
+ if(!head)
+ passdata(sfile, out, -1);
+}
+
+static void sendrange(struct hthead *req, FILE *out, FILE *sfile, struct stat *sb, char *contype, char *spec, int head)
+{
+ char buf[strlen(spec) + 1];
+ char *p, *e;
+ off_t start, end;
+
+ if(strncmp(spec, "bytes=", 6))
+ goto error;
+ strcpy(buf, spec + 6);
+ if((p = strchr(buf, '-')) == NULL)
+ goto error;
+ if(p == buf) {
+ if(!p[1])
+ goto error;
+ end = sb->st_size;
+ start = end - strtoll(p + 1, &e, 10);
+ if(*e)
+ goto error;
+ if(start < 0)
+ start = 0;
+ } else {
+ *(p++) = 0;
+ start = strtoll(buf, &e, 10);
+ if(*e)
+ goto error;
+ if(*p) {
+ end = strtoll(p, &e, 10) + 1;
+ if(*e)
+ goto error;
+ } else {
+ end = sb->st_size;
+ }
+ }
+ if(start >= sb->st_size) {
+ fprintf(out, "HTTP/1.1 416 Not satisfiable\n");
+ fprintf(out, "Content-Range: */%ji\n", (intmax_t)sb->st_size);
+ fprintf(out, "Content-Length: 0\n");
+ fprintf(out, "Last-Modified: %s\n", fmthttpdate(sb->st_mtime));
+ fprintf(out, "Date: %s\n", fmthttpdate(time(NULL)));
+ fprintf(out, "\n");
+ return;
+ }
+ if((start < 0) || (start >= end))
+ goto error;
+ if(end > sb->st_size)
+ end = sb->st_size;
+ errno = 0;
+ if(fseeko(sfile, start, SEEK_SET)) {
+ simpleerror2(out, 500, "Internal Error", "Could not seek properly to beginning of requested byte range.");
+ flog(LOG_ERR, "sendfile: could not seek properly when serving partial content: %s", strerror(errno));
+ return;
+ }
+ fprintf(out, "HTTP/1.1 206 Partial content\n");
+ fprintf(out, "Content-Range: bytes %ji-%ji/%ji\n", (intmax_t)start, (intmax_t)(end - 1), (intmax_t)sb->st_size);
+ fprintf(out, "Content-Length: %ji\n", (intmax_t)(end - start));
+ fprintf(out, "Content-Type: %s\n", contype);
+ fprintf(out, "Last-Modified: %s\n", fmthttpdate(sb->st_mtime));
+ fprintf(out, "Date: %s\n", fmthttpdate(time(NULL)));
+ fprintf(out, "\n");
+ if(!head)
+ passdata(sfile, out, end - start);
+ return;
+
+error:
+ sendwhole(req, out, sfile, sb, contype, head);
+}
+
+static void serve(struct muth *muth, va_list args)
+{
+ vavar(struct hthead *, req);
+ vavar(int, fd);
+ FILE *out, *sfile;
+ int ishead;
+ char *file, *contype, *hdr;
+ struct stat sb;
+
+ sfile = NULL;
+ contype = NULL;
+ out = mtstdopen(fd, 1, 60, "r+");
+
+ if((file = getheader(req, "X-Ash-File")) == NULL) {
+ flog(LOG_ERR, "psendfile: needs to be called with the X-Ash-File header");
+ simpleerror2(out, 500, "Internal Error", "The server is incorrectly configured.");
+ goto out;
+ }
+ if(*req->rest) {
+ simpleerror2(out, 404, "Not Found", "The requested URL has no corresponding resource.");
+ goto out;
+ }
+ if(((sfile = fopen(file, "r")) < 0) || fstat(fileno(sfile), &sb)) {
+ flog(LOG_ERR, "psendfile: could not stat input file %s: %s", file, strerror(errno));
+ simpleerror2(out, 500, "Internal Error", "The server could not access its own data.");
+ goto out;
+ }
+ if(!strcasecmp(req->method, "get")) {
+ ishead = 0;
+ } else if(!strcasecmp(req->method, "head")) {
+ ishead = 1;
+ } else {
+ simpleerror2(out, 405, "Method not allowed", "The requested method is not defined for this resource.");
+ goto out;
+ }
+ if((hdr = getheader(req, "X-Ash-Content-Type")) == NULL)
+ contype = getmimetype(file, &sb);
+ else
+ contype = sstrdup(hdr);
+ contype = ckctype(contype);
+
+ if(checkcache(req, out, file, &sb))
+ goto out;
+
+ if((hdr = getheader(req, "Range")) != NULL)
+ sendrange(req, out, sfile, &sb, contype, hdr, ishead);
+ else
+ sendwhole(req, out, sfile, &sb, contype, ishead);
+
+out:
+ if(sfile != NULL)
+ fclose(sfile);
+ free(contype);
+ fclose(out);
+ freehthead(req);
+}
+
+static void listenloop(struct muth *muth, va_list args)
+{
+ vavar(int, lfd);
+ int fd;
+ struct hthead *req;
+
+ while(1) {
+ block(lfd, EV_READ, 0);
+ if((fd = recvreq(lfd, &req)) < 0) {
+ if(errno != 0)
+ flog(LOG_ERR, "recvreq: %s", strerror(errno));
+ break;
+ }
+ mustart(serve, req, fd);
+ }
+}
+
+static void sigterm(int sig)
+{
+ shutdown(0, SHUT_RDWR);
+}
+
+static void usage(FILE *out)
+{
+ fprintf(out, "usage: psendfile [-h]\n");
+}
+
+int main(int argc, char **argv)
+{
+ int c;
+
+ setlocale(LC_ALL, "");
+ while((c = getopt(argc, argv, "h")) >= 0) {
+ switch(c) {
+ case 'h':
+ usage(stdout);
+ exit(0);
+ default:
+ usage(stderr);
+ exit(1);
+ }
+ }
+ cookie = magic_open(MAGIC_MIME_TYPE | MAGIC_SYMLINK);
+ magic_load(cookie, NULL);
+ mustart(listenloop, 0);
+ signal(SIGINT, sigterm);
+ signal(SIGTERM, sigterm);
+ ioloop();
+ return(0);
+}
Dolda2000 GitWeb / ashd.git / commitdiff