swfparser.js

swfparser.js

// 
// http://gist.github.com/18326
//
// Copyright (c) KUMAGAI Kentaro ku0522a*gmail.com
// All rights reserved.
//
// 
// Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
// 
// 
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
// 
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// 

//
// based on 
// SWF Parser (AIR application) | flashpanoramas.com blog
// http://flashpanoramas.com/blog/2007/07/02/swf-parser-air-application/
//

function SWFParser(swffile) {
	this.swffile = swffile;
	this.bytes = null;
}

function hex(n) {
	var digits = [];
	for ( var i = 0; i < 8; i++ ) {
		var v = (n >> (i*4)) & 0x0f;
		if ( v >= 10 ) {
			digits.push(
			 String.fromCharCode( 'a'.charCodeAt(0) + (v - 10) )
			 );
		} else {
			digits.push(v);
		}
	}
	return digits.reverse().join("");
}

function saveLocal (name, data) {
	var file = getTempDir(name);
	var os = new FileOutputStream(file,
		FileOutputStream.PR_WRONLY | FileOutputStream.PR_CREATE_FILE | FileOutputStream.PR_TRUNCATE, 420, -1);
	os.write(data, data.length);
	os.close();
	return file;
}

var imageSuffix = 0;

SWFParser.handlers = {
	_jpegTables: null,
	_injectIntoDocuemnt: function (bytes) {
		var d = btoa(bytes);

		var f = saveLocal(imageSuffix + ".jpg", bytes);
		imageSuffix++;

		var windowMediator = Cc["@mozilla.org/appshell/window-mediator;1"].
			getService(Ci.nsIWindowMediator);
		var w =  windowMediator.getMostRecentWindow("navigator:browser");

		//log(w, w.Application, doc);
		 var n = w.Application.activeWindow.activeTab.index;
		 var doc = w.Application.activeWindow.tabs[n].document;


		 //var file = 'file://' + f.path;
		 var file = 'data:image/jpeg;base64,' + btoa(bytes);
		 var img = doc.createElement('img');
		 img.src = file;
		 doc.body.insertBefore( img, doc.body.firstChild);

	
	},
	JPEGTABLES: function (tag) {
		this._jpegTables = tag;
		log(tag);
	},
	DEFINEBITSLOSSLESS2: function (tag) {
		//log(tag);
	},
	DEFINEBITS: function (tag) {
		var bb = new SWFParser.ByteBuffer(tag.bytes);
		tag.characterID = bb.readUnsignedShort();
		
		tag.JPEGData = bb.readBytes( tag.size );

		var t = this._jpegTables;
		var tables = t.bytes.substr(2, t.size - 4);

		var soi = tag.JPEGData.substr(0, 2);
		var bytes = soi + tables + tag.JPEGData.substr(2);

		this._injectIntoDocuemnt(bytes);
		log(tag);
	},
	DEFINEBITSJPEG2: function (tag) {
		var bb = new SWFParser.ByteBuffer(tag.bytes);
		tag.characterID = bb.readUnsignedShort();
		
		tag.JPEGData = bb.readBytes( tag.size );

		// remove eoi - soi sequence.
		tag.JPEGData = tag.JPEGData.replace(/\xff\xd9\xff\xd8/, '');

		this._injectIntoDocuemnt(tag.JPEGData);
		log(tag);
	},
	DEFINEBITSJPEG3: function (tag) {
		var bb = new SWFParser.ByteBuffer(tag.bytes);
		tag.characterID = bb.readUnsignedShort();
		tag.alphaDataOffset = bb.readUnsignedInt();

		var n = tag.alphaDataOffset;
		tag.JPEGData = bb.readBytes( n );

		this._injectIntoDocuemnt(tag.JPEGData);
		log(tag);

	},
	DOACTION: function (tag) {
	//	log(tag);
	}
}

// cat rfxswf.h | perl -nle '/^#define ST_(\w+)\s+(\d+)/ and print qq{$2: "$1",}'
SWFParser.id2name = {
0: "END",
1: "SHOWFRAME",
2: "DEFINESHAPE",
3: "FREECHARACTER",
4: "PLACEOBJECT",
5: "REMOVEOBJECT",
6: "DEFINEBITS",
7: "DEFINEBUTTON",
8: "JPEGTABLES",
9: "SETBACKGROUNDCOLOR",
10: "DEFINEFONT",
11: "DEFINETEXT",
12: "DOACTION",
13: "DEFINEFONTINFO",
14: "DEFINESOUND",
15: "STARTSOUND",
17: "DEFINEBUTTONSOUND",
18: "SOUNDSTREAMHEAD",
19: "SOUNDSTREAMBLOCK",
20: "DEFINEBITSLOSSLESS",
21: "DEFINEBITSJPEG2",
22: "DEFINESHAPE2",
23: "DEFINEBUTTONCXFORM",
24: "PROTECT",
26: "PLACEOBJECT2",
28: "REMOVEOBJECT2",
31: "FREEALL",
32: "DEFINESHAPE3",
33: "DEFINETEXT2",
34: "DEFINEBUTTON2",
35: "DEFINEBITSJPEG3",
36: "DEFINEBITSLOSSLESS2",
37: "DEFINEEDITTEXT",
38: "DEFINEMOVIE",
39: "DEFINESPRITE",
40: "NAMECHARACTER",
41: "SERIALNUMBER",
42: "GENERATORTEXT",
43: "FRAMELABEL",
45: "SOUNDSTREAMHEAD2",
46: "DEFINEMORPHSHAPE",
48: "DEFINEFONT2",
49: "TEMPLATECOMMAND",
51: "GENERATOR3",
52: "EXTERNALFONT",
56: "EXPORTASSETS",
57: "IMPORTASSETS",
58: "ENABLEDEBUGGER",
59: "DOINITACTION",
60: "DEFINEVIDEOSTREAM",
61: "VIDEOFRAME",
62: "DEFINEFONTINFO2",
63: "MX4",
64: "ENABLEDEBUGGER2",
65: "SCRIPTLIMITS",
66: "SETTABINDEX",
69: "FILEATTRIBUTES",
70: "PLACEOBJECT3",
71: "IMPORTASSETS2",
73: "DEFINEFONTALIGNZONES",
74: "CSMTEXTSETTINGS",
75: "DEFINEFONT3",
77: "METADATA",
78: "DEFINESCALINGGRID",
83: "DEFINESHAPE4",
84: "DEFINEMORPHSHAPE2",
777: "REFLEX",
778: "GLYPHNAMES",
	
};

SWFParser.ByteBuffer = function (bytes) {
	this.bytes = bytes;
	this.offset = 0;
	this._length = this.bytes.length;
}

SWFParser.ByteBuffer.prototype.eof = function () {
	return (this._length <= this.offset ) ;
}

SWFParser.ByteBuffer.prototype.readByte = function () {
	var offset = this.offset;
	var v = this.bytes.charCodeAt(offset);
	v &= 0xff;

	//log("offset" + hex(offset), ("0x" + hex(v) ) );

	this.offset++;
	return v;
}

SWFParser.ByteBuffer.prototype.readBytes = function (n) {
	if ( n < 0 ) {
		n = this.size - this.offset;
	}
	var offset = this.offset;
	this.offset += n;
	return this.bytes.substr(offset, n);
}
SWFParser.ByteBuffer.prototype._readUnsigned = function (n) {
	var sum = 0;
	for ( var i = 0; i < n; i++ ) {
		var v = this.readByte();
		sum |= ( v << (8*i) );
	}
	return sum;
}
SWFParser.ByteBuffer.prototype.readUnsignedShort = function () {
	return this._readUnsigned(2);
}
SWFParser.ByteBuffer.prototype.readUnsignedInt = function () {
	return this._readUnsigned(4);
}

SWFParser.prototype.onload = function (listener) {
}
SWFParser.prototype.readTag = function (bb) {
	var tag = bb.readUnsignedShort();
	var id = tag >> 6;

	var size = tag & 0x3F;
	if (size == 0x3F) {
		size = bb.readUnsignedInt();
	}

	var name = SWFParser.id2name[id] || ('unknown(' + id + ')');

	return {
		name: name,
		size: size,
		bytes: bb.readBytes(size)
	};
}

SWFParser.prototype._parseBytes = function (bytes) {
	var bb = new SWFParser.ByteBuffer(bytes);
	
	// skip header.
	bb.readBytes(13);

	var names = {};
	
	while ( !bb.eof() ) {
		var tag = this.readTag(bb);
		names[tag.name] = 1;
		var handler = SWFParser.handlers[tag.name];
		if ( handler ) {
			handler.call(SWFParser.handlers, tag);
		} else {
			//log("tag:"+ tag.name, "size:" + tag.size);
		}

	}

	log(keys(names));
}

SWFParser.deflate = function (bytes) {
	var converterService = Cc["@mozilla.org/streamConverters;1"]
		.getService(Ci.nsIStreamConverterService);

	var size = bytes.length;
	var sis = Components.classes["@mozilla.org/io/string-input-stream;1"].
	            createInstance(Components.interfaces.nsIStringInputStream);
	sis.setData(bytes, size);
	var is = sis;

	var bstream = Components.classes["@mozilla.org/binaryinputstream;1"]
		.createInstance(Components.interfaces.nsIBinaryInputStream);
	bstream.setInputStream(sis);

	is = bstream;

	var unzipListener = new SWFParser.DumbListener();

	// Instantiate our gzip decompresser converter
	//var converter = converterService.convert(sis, "gzip", "uncompressed", null);
	var converter = converterService.asyncConvertData("deflate",
	            "uncompressed", unzipListener, null);

	var av = is.available();

	// 絶対に便器！: gzip 圧縮されたデータを展開する方法
	// http://tinybenki.sblo.jp/article/13955802.html
	converter.onStartRequest(null, null);
	converter.onDataAvailable(null, null, is, 0, av);
	converter.onStopRequest(null, null, null);
	return unzipListener.bytes;
}

SWFParser.prototype.parse = function () {
	var self = this;

	var uri = IOService.newURI(this.swffile, null, null);
	var channel = IOService.newChannelFromURI( uri );


	var listener = new SWFParser.DumbListener();
	listener.onload = function () {
		var sig = listener.bytes.substr(0, 3);
		if ( !(sig == 'CWS' || sig == 'FWS' ) ) {
			return;
		}

		var bytes = listener.bytes.substr(8);

		if ( sig == 'CWS' ) {
			var bytes = SWFParser.deflate(bytes);
		}

		self._parseBytes(bytes);

	}

	channel.asyncOpen(listener, null);
}


SWFParser.DumbListener = function () {
	this.bytes = "";
}
SWFParser.DumbListener.prototype.QueryInterface = function () {
	if (aIID.equals(Components.interfaces.nsISupports) ||
		aIID.equals(Components.interfaces.nsIStreamListener) ) {
		return this;
	} else {
		throw Components.results.NS_NOINTERFACE;
	}
}
SWFParser.DumbListener.prototype.onStartRequest = function ( request, context ) {
	log("start", request);
}
SWFParser.DumbListener.prototype.onDataAvailable = function ( request, context,  inputStream,  offset ,  count)  {
	var bstream = Components.classes["@mozilla.org/binaryinputstream;1"]
	.createInstance(Components.interfaces.nsIBinaryInputStream);
	bstream.setInputStream(inputStream);
	var bytes = bstream.readBytes(bstream.available());
	this.bytes += bytes;
};

SWFParser.DumbListener.prototype.onStopRequest = function ( request, context ,  statusCode ) {
	if (this.onload )
		this.onload();
}

// main.

Tombloo.Service.actions.register(

shortcutkeys['CTRL + SHIFT + D'] = {
	name : 'swfparser',
	description : 'extract images from flash file.',
	execute : function () {

		var windowMediator = Cc["@mozilla.org/appshell/window-mediator;1"].
			getService(Ci.nsIWindowMediator);
		var w =  windowMediator.getMostRecentWindow("navigator:browser");
		 var n = w.Application.activeWindow.activeTab.index;
		 var doc = w.Application.activeWindow.tabs[n].document;

		 var tags = doc.getElementsByTagName('embed');
		 for (var i = 0; i < tags.length; i++) {

		 var u = (tags[i].src);
	
		var p = new SWFParser( u );
		p.parse();

		 }

	}
}


);