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Initial commit of zip.js lib

This commit is contained in:
David Humphrey (:humph) david.humphrey@senecacollege.ca 2014-03-25 11:11:47 -04:00
parent 0e213077e7
commit 5a13dbfa4d
3 changed files with 4895 additions and 0 deletions
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/*
Based on https://github.com/gildas-lormeau/zip.js/blob/master/WebContent/zip.js
Copyright (c) 2013 Gildas Lormeau. 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.
3. The names of the authors may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 JCRAFT,
INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE 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.
*/
define(function(require) {
var ERR_BAD_FORMAT = "File format is not recognized.";
var ERR_ENCRYPTED = "File contains encrypted entry.";
var ERR_ZIP64 = "File is using Zip64 (4gb+ file size).";
var ERR_READ = "Error while reading zip file.";
var ERR_WRITE = "Error while writing zip file.";
var ERR_WRITE_DATA = "Error while writing file data.";
var ERR_READ_DATA = "Error while reading file data.";
var ERR_DUPLICATED_NAME = "File already exists.";
var CHUNK_SIZE = 512 * 1024;
var Inflater = require("zip.js/inflate");
var Deflater = require("zip.js/deflate");
var TEXT_PLAIN = "text/plain";
var MESSAGE_EVENT = "message";
var appendABViewSupported;
try {
appendABViewSupported = new Blob([ new DataView(new ArrayBuffer(0)) ]).size === 0;
} catch (e) {
}
function Crc32() {
var crc = -1, that = this;
that.append = function(data) {
var offset, table = that.table;
for (offset = 0; offset < data.length; offset++)
crc = (crc >>> 8) ^ table[(crc ^ data[offset]) & 0xFF];
};
that.get = function() {
return ~crc;
};
}
Crc32.prototype.table = (function() {
var i, j, t, table = [];
for (i = 0; i < 256; i++) {
t = i;
for (j = 0; j < 8; j++)
if (t & 1)
t = (t >>> 1) ^ 0xEDB88320;
else
t = t >>> 1;
table[i] = t;
}
return table;
})();
function blobSlice(blob, index, length) {
if (blob.slice)
return blob.slice(index, index + length);
else if (blob.webkitSlice)
return blob.webkitSlice(index, index + length);
else if (blob.mozSlice)
return blob.mozSlice(index, index + length);
else if (blob.msSlice)
return blob.msSlice(index, index + length);
}
function getDataHelper(byteLength, bytes) {
var dataBuffer, dataArray;
dataBuffer = new ArrayBuffer(byteLength);
dataArray = new Uint8Array(dataBuffer);
if (bytes)
dataArray.set(bytes, 0);
return {
buffer : dataBuffer,
array : dataArray,
view : new DataView(dataBuffer)
};
}
// Readers
function Reader() {
}
function TextReader(text) {
var that = this, blobReader;
function init(callback, onerror) {
var blob = new Blob([ text ], {
type : TEXT_PLAIN
});
blobReader = new BlobReader(blob);
blobReader.init(function() {
that.size = blobReader.size;
callback();
}, onerror);
}
function readUint8Array(index, length, callback, onerror) {
blobReader.readUint8Array(index, length, callback, onerror);
}
that.size = 0;
that.init = init;
that.readUint8Array = readUint8Array;
}
TextReader.prototype = new Reader();
TextReader.prototype.constructor = TextReader;
function Uint8Reader(u8) {
var that = this;
function init(callback, onerror) {
that.size = u8.length;
callback();
}
function readUint8Array(index, length, callback, onerror) {
callback(new Uint8Array(u8.subarray(index, index + length)));
}
that.size = 0;
that.init = init;
that.readUint8Array = readUint8Array;
}
Uint8Reader.prototype = new Reader();
Uint8Reader.prototype.constructor = Uint8Reader;
function BlobReader(blob) {
var that = this;
function init(callback) {
this.size = blob.size;
callback();
}
function readUint8Array(index, length, callback, onerror) {
var reader = new FileReader();
reader.onload = function(e) {
callback(new Uint8Array(e.target.result));
};
reader.onerror = onerror;
reader.readAsArrayBuffer(blobSlice(blob, index, length));
}
that.size = 0;
that.init = init;
that.readUint8Array = readUint8Array;
}
BlobReader.prototype = new Reader();
BlobReader.prototype.constructor = BlobReader;
// Writers
function Writer() {
}
Writer.prototype.getData = function(callback) {
callback(this.data);
};
function TextWriter(encoding) {
var that = this, blob;
function init(callback) {
blob = new Blob([], {
type : TEXT_PLAIN
});
callback();
}
function writeUint8Array(array, callback) {
blob = new Blob([ blob, appendABViewSupported ? array : array.buffer ], {
type : TEXT_PLAIN
});
callback();
}
function getData(callback, onerror) {
var reader = new FileReader();
reader.onload = function(e) {
callback(e.target.result);
};
reader.onerror = onerror;
reader.readAsText(blob, encoding);
}
that.init = init;
that.writeUint8Array = writeUint8Array;
that.getData = getData;
}
TextWriter.prototype = new Writer();
TextWriter.prototype.constructor = TextWriter;
function Uint8Writer() {
var that = this, u8;
function init(callback) {
u8 = new Uint8Array();
callback();
}
function writeUint8Array(array, callback) {
var both = new Uint8Array(u8.length + array.length);
both.set(u8);
both.set(array, u8.length);
u8 = both;
}
function getData(callback) {
callback(u8);
}
that.init = init;
that.writeUint8Array = writeUint8Array;
that.getData = getData;
}
Uint8Writer.prototype = new Writer();
Uint8Writer.prototype.constructor = Uint8Writer;
function BlobWriter(contentType) {
var blob, that = this;
function init(callback) {
blob = new Blob([], {
type : contentType
});
callback();
}
function writeUint8Array(array, callback) {
blob = new Blob([ blob, appendABViewSupported ? array : array.buffer ], {
type : contentType
});
callback();
}
function getData(callback) {
callback(blob);
}
that.init = init;
that.writeUint8Array = writeUint8Array;
that.getData = getData;
}
BlobWriter.prototype = new Writer();
BlobWriter.prototype.constructor = BlobWriter;
// inflate/deflate core functions
function launchProcess(process, reader, writer, offset, size, onappend, onprogress, onend, onreaderror, onwriteerror) {
var chunkIndex = 0, index, outputSize = 0;
function step() {
var outputData;
index = chunkIndex * CHUNK_SIZE;
if (index < size)
reader.readUint8Array(offset + index, Math.min(CHUNK_SIZE, size - index), function(inputData) {
var outputData = process.append(inputData, function() {
if (onprogress)
onprogress(offset + index, size);
});
outputSize += outputData.length;
onappend(true, inputData);
writer.writeUint8Array(outputData, function() {
onappend(false, outputData);
chunkIndex++;
setTimeout(step, 1);
}, onwriteerror);
if (onprogress)
onprogress(index, size);
}, onreaderror);
else {
outputData = process.flush();
if (outputData) {
outputSize += outputData.length;
writer.writeUint8Array(outputData, function() {
onappend(false, outputData);
onend(outputSize);
}, onwriteerror);
} else
onend(outputSize);
}
}
step();
}
function inflate(reader, writer, offset, size, computeCrc32, onend, onprogress, onreaderror, onwriteerror) {
var worker, crc32 = new Crc32();
function oninflateappend(sending, array) {
if (computeCrc32 && !sending)
crc32.append(array);
}
function oninflateend(outputSize) {
onend(outputSize, crc32.get());
}
launchProcess(new Inflater(), reader, writer, offset, size, oninflateappend, onprogress, oninflateend, onreaderror, onwriteerror);
return worker;
}
function deflate(reader, writer, level, onend, onprogress, onreaderror, onwriteerror) {
var worker, crc32 = new Crc32();
function ondeflateappend(sending, array) {
if (sending)
crc32.append(array);
}
function ondeflateend(outputSize) {
onend(outputSize, crc32.get());
}
launchProcess(new Deflater(), reader, writer, 0, reader.size, ondeflateappend, onprogress, ondeflateend, onreaderror, onwriteerror);
return worker;
}
function copy(reader, writer, offset, size, computeCrc32, onend, onprogress, onreaderror, onwriteerror) {
var chunkIndex = 0, crc32 = new Crc32();
function step() {
var index = chunkIndex * CHUNK_SIZE;
if (index < size)
reader.readUint8Array(offset + index, Math.min(CHUNK_SIZE, size - index), function(array) {
if (computeCrc32)
crc32.append(array);
if (onprogress)
onprogress(index, size, array);
writer.writeUint8Array(array, function() {
chunkIndex++;
step();
}, onwriteerror);
}, onreaderror);
else
onend(size, crc32.get());
}
step();
}
// ZipReader
function decodeASCII(str) {
var i, out = "", charCode, extendedASCII = [ '\u00C7', '\u00FC', '\u00E9', '\u00E2', '\u00E4', '\u00E0', '\u00E5', '\u00E7', '\u00EA', '\u00EB',
'\u00E8', '\u00EF', '\u00EE', '\u00EC', '\u00C4', '\u00C5', '\u00C9', '\u00E6', '\u00C6', '\u00F4', '\u00F6', '\u00F2', '\u00FB', '\u00F9',
'\u00FF', '\u00D6', '\u00DC', '\u00F8', '\u00A3', '\u00D8', '\u00D7', '\u0192', '\u00E1', '\u00ED', '\u00F3', '\u00FA', '\u00F1', '\u00D1',
'\u00AA', '\u00BA', '\u00BF', '\u00AE', '\u00AC', '\u00BD', '\u00BC', '\u00A1', '\u00AB', '\u00BB', '_', '_', '_', '\u00A6', '\u00A6',
'\u00C1', '\u00C2', '\u00C0', '\u00A9', '\u00A6', '\u00A6', '+', '+', '\u00A2', '\u00A5', '+', '+', '-', '-', '+', '-', '+', '\u00E3',
'\u00C3', '+', '+', '-', '-', '\u00A6', '-', '+', '\u00A4', '\u00F0', '\u00D0', '\u00CA', '\u00CB', '\u00C8', 'i', '\u00CD', '\u00CE',
'\u00CF', '+', '+', '_', '_', '\u00A6', '\u00CC', '_', '\u00D3', '\u00DF', '\u00D4', '\u00D2', '\u00F5', '\u00D5', '\u00B5', '\u00FE',
'\u00DE', '\u00DA', '\u00DB', '\u00D9', '\u00FD', '\u00DD', '\u00AF', '\u00B4', '\u00AD', '\u00B1', '_', '\u00BE', '\u00B6', '\u00A7',
'\u00F7', '\u00B8', '\u00B0', '\u00A8', '\u00B7', '\u00B9', '\u00B3', '\u00B2', '_', ' ' ];
for (i = 0; i < str.length; i++) {
charCode = str.charCodeAt(i) & 0xFF;
if (charCode > 127)
out += extendedASCII[charCode - 128];
else
out += String.fromCharCode(charCode);
}
return out;
}
function decodeUTF8(string) {
return decodeURIComponent(escape(string));
}
function getString(bytes) {
var i, str = "";
for (i = 0; i < bytes.length; i++)
str += String.fromCharCode(bytes[i]);
return str;
}
function getDate(timeRaw) {
var date = (timeRaw & 0xffff0000) >> 16, time = timeRaw & 0x0000ffff;
try {
return new Date(1980 + ((date & 0xFE00) >> 9), ((date & 0x01E0) >> 5) - 1, date & 0x001F, (time & 0xF800) >> 11, (time & 0x07E0) >> 5,
(time & 0x001F) * 2, 0);
} catch (e) {
}
}
function readCommonHeader(entry, data, index, centralDirectory, onerror) {
entry.version = data.view.getUint16(index, true);
entry.bitFlag = data.view.getUint16(index + 2, true);
entry.compressionMethod = data.view.getUint16(index + 4, true);
entry.lastModDateRaw = data.view.getUint32(index + 6, true);
entry.lastModDate = getDate(entry.lastModDateRaw);
if ((entry.bitFlag & 0x01) === 0x01) {
onerror(ERR_ENCRYPTED);
return;
}
if (centralDirectory || (entry.bitFlag & 0x0008) != 0x0008) {
entry.crc32 = data.view.getUint32(index + 10, true);
entry.compressedSize = data.view.getUint32(index + 14, true);
entry.uncompressedSize = data.view.getUint32(index + 18, true);
}
if (entry.compressedSize === 0xFFFFFFFF || entry.uncompressedSize === 0xFFFFFFFF) {
onerror(ERR_ZIP64);
return;
}
entry.filenameLength = data.view.getUint16(index + 22, true);
entry.extraFieldLength = data.view.getUint16(index + 24, true);
}
function createZipReader(reader, onerror) {
function Entry() {
}
Entry.prototype.getData = function(writer, onend, onprogress, checkCrc32) {
var that = this;
function terminate(callback, param) {
if (callback)
callback(param);
}
function testCrc32(crc32) {
var dataCrc32 = getDataHelper(4);
dataCrc32.view.setUint32(0, crc32);
return that.crc32 == dataCrc32.view.getUint32(0);
}
function getWriterData(uncompressedSize, crc32) {
if (checkCrc32 && !testCrc32(crc32))
onreaderror();
else
writer.getData(function(data) {
terminate(onend, data);
});
}
function onreaderror() {
terminate(onerror, ERR_READ_DATA);
}
function onwriteerror() {
terminate(onerror, ERR_WRITE_DATA);
}
reader.readUint8Array(that.offset, 30, function(bytes) {
var data = getDataHelper(bytes.length, bytes), dataOffset;
if (data.view.getUint32(0) != 0x504b0304) {
onerror(ERR_BAD_FORMAT);
return;
}
readCommonHeader(that, data, 4, false, onerror);
dataOffset = that.offset + 30 + that.filenameLength + that.extraFieldLength;
writer.init(function() {
copy(reader, writer, dataOffset, that.compressedSize, checkCrc32, getWriterData, onprogress, onreaderror, onwriteerror);
}, onwriteerror);
}, onreaderror);
};
function seekEOCDR(offset, entriesCallback) {
reader.readUint8Array(reader.size - offset, offset, function(bytes) {
var dataView = getDataHelper(bytes.length, bytes).view;
if (dataView.getUint32(0) != 0x504b0506) {
seekEOCDR(offset + 1, entriesCallback);
} else {
entriesCallback(dataView);
}
}, function() {
onerror(ERR_READ);
});
}
return {
getEntries : function(callback) {
if (reader.size < 22) {
onerror(ERR_BAD_FORMAT);
return;
}
// look for End of central directory record
seekEOCDR(22, function(dataView) {
var datalength, fileslength;
datalength = dataView.getUint32(16, true);
fileslength = dataView.getUint16(8, true);
reader.readUint8Array(datalength, reader.size - datalength, function(bytes) {
var i, index = 0, entries = [], entry, filename, comment, data = getDataHelper(bytes.length, bytes);
for (i = 0; i < fileslength; i++) {
entry = new Entry();
if (data.view.getUint32(index) != 0x504b0102) {
onerror(ERR_BAD_FORMAT);
return;
}
readCommonHeader(entry, data, index + 6, true, onerror);
entry.commentLength = data.view.getUint16(index + 32, true);
entry.directory = ((data.view.getUint8(index + 38) & 0x10) == 0x10);
entry.offset = data.view.getUint32(index + 42, true);
filename = getString(data.array.subarray(index + 46, index + 46 + entry.filenameLength));
entry.filename = ((entry.bitFlag & 0x0800) === 0x0800) ? decodeUTF8(filename) : decodeASCII(filename);
if (!entry.directory && entry.filename.charAt(entry.filename.length - 1) == "/")
entry.directory = true;
comment = getString(data.array.subarray(index + 46 + entry.filenameLength + entry.extraFieldLength, index + 46
+ entry.filenameLength + entry.extraFieldLength + entry.commentLength));
entry.comment = ((entry.bitFlag & 0x0800) === 0x0800) ? decodeUTF8(comment) : decodeASCII(comment);
entries.push(entry);
index += 46 + entry.filenameLength + entry.extraFieldLength + entry.commentLength;
}
callback(entries);
}, function() {
onerror(ERR_READ);
});
});
},
close : function(callback) {
if (callback)
callback();
}
};
}
// ZipWriter
function encodeUTF8(string) {
return unescape(encodeURIComponent(string));
}
function getBytes(str) {
var i, array = [];
for (i = 0; i < str.length; i++)
array.push(str.charCodeAt(i));
return array;
}
function createZipWriter(writer, onerror, dontDeflate) {
var files = {}, filenames = [], datalength = 0;
function terminate(callback, message) {
if (callback)
callback(message);
}
function onwriteerror() {
terminate(onerror, ERR_WRITE);
}
function onreaderror() {
terminate(onerror, ERR_READ_DATA);
}
return {
add : function(name, reader, onend, onprogress, options) {
var header, filename, date;
function writeHeader(callback) {
var data;
date = options.lastModDate || new Date();
header = getDataHelper(26);
files[name] = {
headerArray : header.array,
directory : options.directory,
filename : filename,
offset : datalength,
comment : getBytes(encodeUTF8(options.comment || ""))
};
header.view.setUint32(0, 0x14000808);
if (options.version)
header.view.setUint8(0, options.version);
if (!dontDeflate && options.level !== 0 && !options.directory)
header.view.setUint16(4, 0x0800);
header.view.setUint16(6, (((date.getHours() << 6) | date.getMinutes()) << 5) | date.getSeconds() / 2, true);
header.view.setUint16(8, ((((date.getFullYear() - 1980) << 4) | (date.getMonth() + 1)) << 5) | date.getDate(), true);
header.view.setUint16(22, filename.length, true);
data = getDataHelper(30 + filename.length);
data.view.setUint32(0, 0x504b0304);
data.array.set(header.array, 4);
data.array.set(filename, 30);
datalength += data.array.length;
writer.writeUint8Array(data.array, callback, onwriteerror);
}
function writeFooter(compressedLength, crc32) {
var footer = getDataHelper(16);
datalength += compressedLength || 0;
footer.view.setUint32(0, 0x504b0708);
if (typeof crc32 != "undefined") {
header.view.setUint32(10, crc32, true);
footer.view.setUint32(4, crc32, true);
}
if (reader) {
footer.view.setUint32(8, compressedLength, true);
header.view.setUint32(14, compressedLength, true);
footer.view.setUint32(12, reader.size, true);
header.view.setUint32(18, reader.size, true);
}
writer.writeUint8Array(footer.array, function() {
datalength += 16;
terminate(onend);
}, onwriteerror);
}
function writeFile() {
options = options || {};
name = name.trim();
if (options.directory && name.charAt(name.length - 1) != "/")
name += "/";
if (files.hasOwnProperty(name)) {
onerror(ERR_DUPLICATED_NAME);
return;
}
filename = getBytes(encodeUTF8(name));
filenames.push(name);
writeHeader(function() {
if (reader)
if (dontDeflate || options.level === 0)
copy(reader, writer, 0, reader.size, true, writeFooter, onprogress, onreaderror, onwriteerror);
else
writeFooter();
}, onwriteerror);
}
if (reader)
reader.init(writeFile, onreaderror);
else
writeFile();
},
close : function(callback) {
var data, length = 0, index = 0, indexFilename, file;
for (indexFilename = 0; indexFilename < filenames.length; indexFilename++) {
file = files[filenames[indexFilename]];
length += 46 + file.filename.length + file.comment.length;
}
data = getDataHelper(length + 22);
for (indexFilename = 0; indexFilename < filenames.length; indexFilename++) {
file = files[filenames[indexFilename]];
data.view.setUint32(index, 0x504b0102);
data.view.setUint16(index + 4, 0x1400);
data.array.set(file.headerArray, index + 6);
data.view.setUint16(index + 32, file.comment.length, true);
if (file.directory)
data.view.setUint8(index + 38, 0x10);
data.view.setUint32(index + 42, file.offset, true);
data.array.set(file.filename, index + 46);
data.array.set(file.comment, index + 46 + file.filename.length);
index += 46 + file.filename.length + file.comment.length;
}
data.view.setUint32(index, 0x504b0506);
data.view.setUint16(index + 8, filenames.length, true);
data.view.setUint16(index + 10, filenames.length, true);
data.view.setUint32(index + 12, length, true);
data.view.setUint32(index + 16, datalength, true);
writer.writeUint8Array(data.array, function() {
terminate(function() {
writer.getData(callback);
});
}, onwriteerror);
}
};
}
return {
Reader : Reader,
Writer : Writer,
BlobReader : BlobReader,
Uint8Reader : Uint8Reader,
TextReader : TextReader,
BlobWriter : BlobWriter,
Uint8Writer : Uint8Writer,
TextWriter : TextWriter,
createReader : function(reader, callback, onerror) {
reader.init(function() {
callback(createZipReader(reader, onerror));
}, onerror);
},
createWriter : function(writer, callback, onerror, dontDeflate) {
writer.init(function() {
callback(createZipWriter(writer, onerror, dontDeflate));
}, onerror);
}
};
});