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274 lines
6.5 KiB
274 lines
6.5 KiB
/*
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* Copyright 2007, 2014 Vincent Sanders <vince@netsurf-browser.org>
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* Copyright 2007 Rob Kendrick <rjek@netsurf-browser.org>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file
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* file extension to mimetype mapping for the GTK frontend
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*
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* allows GTK frontend to map file extension to mime types using a
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* default builtin list and /etc/mime.types file if present.
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*
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* mime type and content type handling is derived from the BNF in
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* RFC822 section 3.3, RFC2045 section 5.1 and RFC6838 section
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* 4.2. Upshot is their charset and parsing is all a strict subset of
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* ASCII hence not using locale dependant ctype functions for parsing.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <string.h>
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#include <strings.h>
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#include <gtk/gtk.h>
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#include "utils/log.h"
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#include "utils/hashtable.h"
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#include "utils/filepath.h"
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#include "utils/file.h"
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#include "utils/nsurl.h"
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#include "utils/ascii.h"
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#include "netsurf/fetch.h"
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#include "gtk/gui.h"
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#include "gtk/resources.h"
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#include "gtk/fetch.h"
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#define HASH_SIZE 117
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#define MAX_LINE_LEN 256
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static struct hash_table *mime_hash = NULL;
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void gtk_fetch_filetype_init(const char *mimefile)
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{
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struct stat statbuf;
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FILE *fh = NULL;
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mime_hash = hash_create(HASH_SIZE);
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/* Some OSes (mentioning no Solarises) have a worthlessly tiny
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* /etc/mime.types that don't include essential things, so we
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* pre-seed our hash with the essentials. These will get
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* over-ridden if they are mentioned in the mime.types file.
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*/
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hash_add(mime_hash, "css", "text/css");
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hash_add(mime_hash, "htm", "text/html");
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hash_add(mime_hash, "html", "text/html");
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hash_add(mime_hash, "jpg", "image/jpeg");
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hash_add(mime_hash, "jpeg", "image/jpeg");
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hash_add(mime_hash, "jxl", "image/jxl");
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hash_add(mime_hash, "gif", "image/gif");
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hash_add(mime_hash, "png", "image/png");
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hash_add(mime_hash, "jng", "image/jng");
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hash_add(mime_hash, "mng", "image/mng");
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hash_add(mime_hash, "webp", "image/webp");
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hash_add(mime_hash, "spr", "image/x-riscos-sprite");
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hash_add(mime_hash, "bmp", "image/bmp");
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/* first, check to see if /etc/mime.types in preference */
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if ((stat("/etc/mime.types", &statbuf) == 0) &&
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S_ISREG(statbuf.st_mode)) {
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mimefile = "/etc/mime.types";
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}
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fh = fopen(mimefile, "r");
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if (fh == NULL) {
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NSLOG(netsurf, INFO,
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"Unable to open a mime.types file, so using a minimal one for you.");
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return;
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}
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while (feof(fh) == 0) {
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char line[MAX_LINE_LEN], *ptr, *type, *ext;
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if (fgets(line, sizeof(line), fh) == NULL)
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break;
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if ((feof(fh) == 0) && line[0] != '#') {
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ptr = line;
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/* search for the first non-whitespace character */
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while (ascii_is_space(*ptr)) {
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ptr++;
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}
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/* is this line empty other than leading whitespace? */
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if (*ptr == '\n' || *ptr == '\0') {
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continue;
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}
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type = ptr;
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/* search for the first whitespace char or NUL or
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* NL */
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while (*ptr && (!ascii_is_space(*ptr))) {
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ptr++;
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}
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if (*ptr == '\0' || *ptr == '\n') {
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/* this mimetype has no extensions - read next
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* line.
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*/
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continue;
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}
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*ptr++ = '\0';
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/* search for the first non-whitespace character which
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* will be the first filename extenion */
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while (ascii_is_space(*ptr)) {
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ptr++;
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}
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while (true) {
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ext = ptr;
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/* search for the first whitespace char or
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* NUL or NL which is the end of the ext.
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*/
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while (*ptr && (!ascii_is_space(*ptr))) {
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ptr++;
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}
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if (*ptr == '\0' || *ptr == '\n') {
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/* special case for last extension on
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* the line
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*/
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*ptr = '\0';
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hash_add(mime_hash, ext, type);
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break;
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}
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*ptr++ = '\0';
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hash_add(mime_hash, ext, type);
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/* search for the first non-whitespace char or
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* NUL or NL, to find start of next ext.
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*/
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while (*ptr &&
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(ascii_is_space(*ptr)) &&
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*ptr != '\n') {
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ptr++;
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}
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}
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}
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}
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fclose(fh);
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}
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void gtk_fetch_filetype_fin(void)
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{
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hash_destroy(mime_hash);
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}
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const char *fetch_filetype(const char *unix_path)
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{
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struct stat statbuf;
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char *ext;
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const char *ptr;
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char *lowerchar;
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const char *type;
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int l;
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/* stat the path to attempt to determine if the file is special */
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if (stat(unix_path, &statbuf) == 0) {
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/* stat suceeded so can check for directory */
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if (S_ISDIR(statbuf.st_mode)) {
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return "application/x-netsurf-directory";
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}
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}
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l = strlen(unix_path);
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/* Hacky RISC OS compatibility */
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if ((3 < l) && (strcasecmp(unix_path + l - 4, ",f79") == 0)) {
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return "text/css";
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} else if ((3 < l) && (strcasecmp(unix_path + l - 4, ",faf") == 0)) {
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return "text/html";
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} else if ((3 < l) && (strcasecmp(unix_path + l - 4, ",b60") == 0)) {
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return "image/png";
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} else if ((3 < l) && (strcasecmp(unix_path + l - 4, ",ff9") == 0)) {
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return "image/x-riscos-sprite";
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}
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if (strchr(unix_path, '.') == NULL) {
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/* no extension anywhere! */
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return "text/plain";
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}
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ptr = unix_path + strlen(unix_path);
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while (*ptr != '.' && *ptr != '/') {
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ptr--;
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}
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if (*ptr != '.') {
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return "text/plain";
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}
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ext = strdup(ptr + 1); /* skip the . */
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/* the hash table only contains lower-case versions - make sure this
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* copy is lower case too.
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*/
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lowerchar = ext;
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while (*lowerchar) {
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*lowerchar = ascii_to_lower(*lowerchar);
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lowerchar++;
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}
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type = hash_get(mime_hash, ext);
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free(ext);
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if (type == NULL) {
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type = "text/plain";
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}
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return type;
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}
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static nsurl *nsgtk_get_resource_url(const char *path)
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{
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char buf[PATH_MAX];
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nsurl *url = NULL;
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/* favicon.ico -> favicon.png */
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if (strcmp(path, "favicon.ico") == 0) {
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nsurl_create("resource:favicon.png", &url);
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} else {
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netsurf_path_to_nsurl(filepath_sfind(respaths, buf, path), &url);
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}
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return url;
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}
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static struct gui_fetch_table fetch_table = {
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.filetype = fetch_filetype,
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.get_resource_url = nsgtk_get_resource_url,
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.get_resource_data = nsgtk_data_from_resname,
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};
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struct gui_fetch_table *nsgtk_fetch_table = &fetch_table;
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