netsurf/monkey/filetype.c

228 lines
5.1 KiB
C

/*
* Copyright 2007 Rob Kendrick <rjek@netsurf-browser.org>
* Copyright 2007 Vincent Sanders <vince@debian.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf 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; version 2 of the License.
*
* NetSurf 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 <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include "gtk/filetype.h"
#include "content/fetch.h"
#include "utils/log.h"
#include "utils/hashtable.h"
static struct hash_table *mime_hash = NULL;
void gtk_fetch_filetype_init(const char *mimefile)
{
struct stat statbuf;
FILE *fh = NULL;
mime_hash = hash_create(117);
/* first, check to see if /etc/mime.types in preference */
if ((stat("/etc/mime.types", &statbuf) == 0) &&
S_ISREG(statbuf.st_mode)) {
mimefile = "/etc/mime.types";
}
fh = fopen(mimefile, "r");
/* Some OSes (mentioning no Solarises) have a worthlessly tiny
* /etc/mime.types that don't include essential things, so we
* pre-seed our hash with the essentials. These will get
* over-ridden if they are mentioned in the mime.types file.
*/
hash_add(mime_hash, "css", "text/css");
hash_add(mime_hash, "htm", "text/html");
hash_add(mime_hash, "html", "text/html");
hash_add(mime_hash, "jpg", "image/jpeg");
hash_add(mime_hash, "jpeg", "image/jpeg");
hash_add(mime_hash, "gif", "image/gif");
hash_add(mime_hash, "png", "image/png");
hash_add(mime_hash, "jng", "image/jng");
hash_add(mime_hash, "mng", "image/mng");
hash_add(mime_hash, "webp", "image/webp");
hash_add(mime_hash, "spr", "image/x-riscos-sprite");
if (fh == NULL) {
LOG(("Unable to open a mime.types file, so using a minimal one for you."));
return;
}
while (!feof(fh)) {
char line[256], *ptr, *type, *ext;
if (fgets(line, 256, fh) == NULL)
break;
if (!feof(fh) && line[0] != '#') {
ptr = line;
/* search for the first non-whitespace character */
while (isspace(*ptr))
ptr++;
/* is this line empty other than leading whitespace? */
if (*ptr == '\n' || *ptr == '\0')
continue;
type = ptr;
/* search for the first non-whitespace char or NUL or
* NL */
while (*ptr && (!isspace(*ptr)) && *ptr != '\n')
ptr++;
if (*ptr == '\0' || *ptr == '\n') {
/* this mimetype has no extensions - read next
* line.
*/
continue;
}
*ptr++ = '\0';
/* search for the first non-whitespace character which
* will be the first filename extenion */
while (isspace(*ptr))
ptr++;
while(true) {
ext = ptr;
/* search for the first whitespace char or
* NUL or NL which is the end of the ext.
*/
while (*ptr && (!isspace(*ptr)) &&
*ptr != '\n')
ptr++;
if (*ptr == '\0' || *ptr == '\n') {
/* special case for last extension on
* the line
*/
*ptr = '\0';
hash_add(mime_hash, ext, type);
break;
}
*ptr++ = '\0';
hash_add(mime_hash, ext, type);
/* search for the first non-whitespace char or
* NUL or NL, to find start of next ext.
*/
while (*ptr && (isspace(*ptr)) && *ptr != '\n')
ptr++;
}
}
}
fclose(fh);
}
void gtk_fetch_filetype_fin(void)
{
hash_destroy(mime_hash);
}
const char *fetch_filetype(const char *unix_path)
{
struct stat statbuf;
char *ext;
const char *ptr;
char *lowerchar;
const char *type;
int l;
stat(unix_path, &statbuf);
if (S_ISDIR(statbuf.st_mode))
return "application/x-netsurf-directory";
l = strlen(unix_path);
if ((3 < l) && (strcasecmp(unix_path + l - 4, ",f79") == 0)) {
return "text/css";
}
if (strchr(unix_path, '.') == NULL) {
/* no extension anywhere! */
return "text/plain";
}
ptr = unix_path + strlen(unix_path);
while (*ptr != '.' && *ptr != '/')
ptr--;
if (*ptr != '.')
return "text/plain";
ext = strdup(ptr + 1); /* skip the . */
/* the hash table only contains lower-case versions - make sure this
* copy is lower case too.
*/
lowerchar = ext;
while(*lowerchar) {
*lowerchar = tolower(*lowerchar);
lowerchar++;
}
type = hash_get(mime_hash, ext);
free(ext);
return type != NULL ? type : "text/plain";
}
char *fetch_mimetype(const char *unix_path)
{
return strdup(fetch_filetype(unix_path));
}
#ifdef TEST_RIG
int main(int argc, char *argv[])
{
unsigned int c1, *c2;
const char *key;
gtk_fetch_filetype_init("./mime.types");
c1 = 0; c2 = 0;
while ( (key = hash_iterate(mime_hash, &c1, &c2)) != NULL) {
printf("%s ", key);
}
printf("\n");
if (argc > 1) {
printf("%s maps to %s\n", argv[1], fetch_filetype(argv[1]));
}
gtk_fetch_filetype_fin();
}
#endif