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/*
* Copyright (C) 2016 Jens Georg <mail@jensge.org>
*
* Author: Jens Georg <mail@jensge.org>
*
* This file is part of Rygel.
*
* Rygel is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Rygel 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
public errordomain ExtractorError {
GENERAL,
INVALID
}
public class Rygel.MediaExport.Extractor : Object {
private const string INVALID_CHARS = "()[]<>{}!@#$^&*+=|\\/\"'?~";
private const string CONVERT_CHARS = "\t_\\.";
private const string BLOCK_PATTERN = "%s[^%s]*%s";
private const string[] BLOCKS = { "()", "{}", "[]", "<>" };
private const string[] BLACKLIST = {
"720p", "1080p", "x264", "ws", "proper", "real.repack", "repack",
"hdtv", "pdtv", "notv", "dsr", "DVDRip", "divx", "xvid"
};
private const string[] VIDEO_SUFFIXES = {
"webm", "mkv", "flv", "ogv", "ogg", "avi", "mov", "wmv", "mp4",
"m4v", "mpeg", "mpg", "iso", "mp3", "m4a", "png", "jpg", "jpeg",
"ogv", "oga", "3gp",
// DIDL playlists
"xml"
};
private static Regex char_remove_regex;
private static Regex char_convert_regex;
private static Regex space_compress_regex;
private static Regex[] block_regexes;
private static Regex[] blacklist_regexes;
private static Regex[] video_suffix_regexes;
public File file { get; construct set; }
public bool extract_metadata { get; construct set; default = true; }
protected VariantDict serialized_info;
/**
* Factory method for creating specific extractors depending on the
* content type of the file
*/
public static Extractor create_for_file (File file,
string content_type,
bool extract_metadata) {
if (!extract_metadata) {
return new Extractor (file, false);
}
var is_text = content_type.has_prefix ("text/") ||
content_type.has_suffix ("xml");
if (content_type == "application/x-cd-image") {
return new DVDParser (file);
}
if (is_text) {
return new PlaylistExtractor (file);
}
if (content_type == "image/jpeg" ||
content_type == "image/png") {
return new ImageExtractor (file);
}
return new GenericExtractor (file);
}
private Extractor (File file, bool extract_metadata) {
Object (file: file, extract_metadata: extract_metadata);
}
public override void constructed () {
this.serialized_info = new VariantDict ();
}
public virtual async void run () throws Error {
var file_info = yield file.query_info_async (FileAttribute.STANDARD_TYPE + "," +
FileAttribute.STANDARD_CONTENT_TYPE + "," +
FileAttribute.STANDARD_SIZE + "," +
FileAttribute.TIME_MODIFIED + "," +
FileAttribute.STANDARD_DISPLAY_NAME,
FileQueryInfoFlags.NONE);
var display_name = file_info.get_display_name ();
if (extract_metadata) {
var title = this.strip_invalid_entities (display_name);
this.serialized_info.insert (Serializer.TITLE, "s", title);
} else {
this.serialized_info.insert (Serializer.TITLE, "s", display_name);
}
var mtime = file_info.get_attribute_uint64 (FileAttribute.TIME_MODIFIED);
this.serialized_info.insert (Serializer.MODIFIED, "t", mtime);
var dt = new DateTime.from_unix_utc ((int64) mtime);
var date = "%sZ".printf (dt.format ("%Y-%m-%dT%H:%M:%S"));
this.serialized_info.insert (Serializer.DATE, "s", date);
var content_type = ContentType.get_mime_type
(file_info.get_content_type ());
if (!extract_metadata) {
if (content_type.has_prefix ("video/")) {
this.serialized_info.insert (Serializer.UPNP_CLASS, "s", UPNP_CLASS_VIDEO);
} else if (content_type.has_prefix ("image/")) {
this.serialized_info.insert (Serializer.UPNP_CLASS, "s", UPNP_CLASS_PHOTO);
} else if (content_type.has_prefix ("audio/") || content_type == "application/ogg") {
this.serialized_info.insert (Serializer.UPNP_CLASS, "s", UPNP_CLASS_MUSIC);
} else { // application/xml or text/xml
// Do nothing. Should at least try to parse a DIDL_S playlist here?
}
}
this.serialized_info.insert (Serializer.MIME_TYPE, "s", content_type);
this.serialized_info.insert (Serializer.SIZE, "t", file_info.get_size ());
var id = Checksum.compute_for_string (ChecksumType.MD5,
file.get_uri ());
this.serialized_info.insert (Serializer.ID, "s", id);
this.serialized_info.insert (Serializer.URI, "s", file.get_uri ());
}
public new Variant? @get () {
// If the date has a timezone offset, make sure it contains a
// colon bgo#702231, DLNA 7.3.21.1
var date = this.serialized_info.lookup_value (Serializer.DATE,
VariantType.STRING);
if ("T" in date.get_string ()) {
var fixed_date = new Soup.Date.from_string (date.get_string ());
var new_date = fixed_date.to_string (Soup.DateFormat.ISO8601_FULL);
this.serialized_info.insert (Serializer.DATE, "s", new_date);
}
return this.serialized_info.end ();
}
private string strip_invalid_entities (string original) {
if (char_remove_regex == null) {
try {
var regex_string = Regex.escape_string (INVALID_CHARS);
char_remove_regex = new Regex ("[%s]".printf (regex_string));
regex_string = Regex.escape_string (CONVERT_CHARS);
char_convert_regex = new Regex ("[%s]".printf (regex_string));
space_compress_regex = new Regex ("\\s+");
block_regexes = new Regex[0];
foreach (var block in BLOCKS) {
var block_re = BLOCK_PATTERN.printf (
Regex.escape_string ("%C".printf (block[0])),
Regex.escape_string ("%C".printf (block[1])),
Regex.escape_string ("%C".printf (block[1])));
block_regexes += new Regex (block_re);
}
foreach (var blacklist in BLACKLIST) {
blacklist_regexes += new Regex (Regex.escape_string
(blacklist));
}
foreach (var suffix in VIDEO_SUFFIXES) {
var regex = new Regex (Regex.escape_string (suffix),
RegexCompileFlags.CASELESS);
video_suffix_regexes += regex;
}
} catch (RegexError error) {
assert_not_reached ();
}
}
string p;
p = original;
try {
foreach (var re in blacklist_regexes) {
p = re.replace_literal (p, -1, 0, "");
}
foreach (var re in video_suffix_regexes) {
p = re.replace_literal (p, -1, 0, "");
}
foreach (var re in block_regexes) {
p = re.replace_literal (p, -1, 0, "");
}
p = char_remove_regex.replace_literal (p, -1, 0, "");
p = char_convert_regex.replace_literal (p, -1, 0, " ");
p = space_compress_regex.replace_literal (p, -1, 0, " ");
p._strip ();
return p;
} catch (RegexError error) {
assert_not_reached ();
}
}
}
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