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Moving code to GitHub
2014-12-19 14:30:46 +01:00
/**
JSZip - A Javascript class for generating and reading zip files
<http://stuartk.com/jszip>
(c) 2009-2012 Stuart Knightley <stuart [at] stuartk.com>
Dual licenced under the MIT license or GPLv3. See LICENSE.markdown.
Usage:
zip = new JSZip();
zip.file("hello.txt", "Hello, World!").file("tempfile", "nothing");
zip.folder("images").file("smile.gif", base64Data, {base64: true});
zip.file("Xmas.txt", "Ho ho ho !", {date : new Date("December 25, 2007 00:00:01")});
zip.remove("tempfile");
base64zip = zip.generate();
**/
"use strict";
/**
* Representation a of zip file in js
* @constructor
* @param {String=|ArrayBuffer=|Uint8Array=|Buffer=} data the data to load, if any (optional).
* @param {Object=} options the options for creating this objects (optional).
*/
var JSZip = function(data, options) {
// object containing the files :
// {
// "folder/" : {...},
// "folder/data.txt" : {...}
// }
this.files = {};
// Where we are in the hierarchy
this.root = "";
if (data) {
this.load(data, options);
}
};
JSZip.signature = {
LOCAL_FILE_HEADER : "\x50\x4b\x03\x04",
CENTRAL_FILE_HEADER : "\x50\x4b\x01\x02",
CENTRAL_DIRECTORY_END : "\x50\x4b\x05\x06",
ZIP64_CENTRAL_DIRECTORY_LOCATOR : "\x50\x4b\x06\x07",
ZIP64_CENTRAL_DIRECTORY_END : "\x50\x4b\x06\x06",
DATA_DESCRIPTOR : "\x50\x4b\x07\x08"
};
// Default properties for a new file
JSZip.defaults = {
base64: false,
binary: false,
dir: false,
date: null,
compression: null
};
JSZip.prototype = (function () {
/**
* Returns the raw data of a ZipObject, decompress the content if necessary.
* @param {ZipObject} file the file to use.
* @return {String|ArrayBuffer|Uint8Array|Buffer} the data.
*/
var getRawData = function (file) {
if (file._data instanceof JSZip.CompressedObject) {
file._data = file._data.getContent();
file.options.binary = true;
file.options.base64 = false;
if (JSZip.utils.getTypeOf(file._data) === "uint8array") {
var copy = file._data;
// when reading an arraybuffer, the CompressedObject mechanism will keep it and subarray() a Uint8Array.
// if we request a file in the same format, we might get the same Uint8Array or its ArrayBuffer (the original zip file).
file._data = new Uint8Array(copy.length);
// with an empty Uint8Array, Opera fails with a "Offset larger than array size"
if (copy.length !== 0) {
file._data.set(copy, 0);
}
}
}
return file._data;
};
/**
* Returns the data of a ZipObject in a binary form. If the content is an unicode string, encode it.
* @param {ZipObject} file the file to use.
* @return {String|ArrayBuffer|Uint8Array|Buffer} the data.
*/
var getBinaryData = function (file) {
var result = getRawData(file), type = JSZip.utils.getTypeOf(result);
if (type === "string") {
if (!file.options.binary) {
// unicode text !
// unicode string => binary string is a painful process, check if we can avoid it.
if (JSZip.support.uint8array && typeof TextEncoder === "function") {
return TextEncoder("utf-8").encode(result);
}
if (JSZip.support.nodebuffer) {
return new Buffer(result, "utf-8");
}
}
return file.asBinary();
}
return result;
}
/**
* Transform this._data into a string.
* @param {function} filter a function String -> String, applied if not null on the result.
* @return {String} the string representing this._data.
*/
var dataToString = function (asUTF8) {
var result = getRawData(this);
if (result === null || typeof result === "undefined") {
return "";
}
// if the data is a base64 string, we decode it before checking the encoding !
if (this.options.base64) {
result = JSZip.base64.decode(result);
}
if (asUTF8 && this.options.binary) {
// JSZip.prototype.utf8decode supports arrays as input
// skip to array => string step, utf8decode will do it.
result = JSZip.prototype.utf8decode(result);
} else {
// no utf8 transformation, do the array => string step.
result = JSZip.utils.transformTo("string", result);
}
if (!asUTF8 && !this.options.binary) {
result = JSZip.prototype.utf8encode(result);
}
return result;
};
/**
* A simple object representing a file in the zip file.
* @constructor
* @param {string} name the name of the file
* @param {String|ArrayBuffer|Uint8Array|Buffer} data the data
* @param {Object} options the options of the file
*/
var ZipObject = function (name, data, options) {
this.name = name;
this._data = data;
this.options = options;
};
ZipObject.prototype = {
/**
* Return the content as UTF8 string.
* @return {string} the UTF8 string.
*/
asText : function () {
return dataToString.call(this, true);
},
/**
* Returns the binary content.
* @return {string} the content as binary.
*/
asBinary : function () {
return dataToString.call(this, false);
},
/**
* Returns the content as a nodejs Buffer.
* @return {Buffer} the content as a Buffer.
*/
asNodeBuffer : function () {
var result = getBinaryData(this);
return JSZip.utils.transformTo("nodebuffer", result);
},
/**
* Returns the content as an Uint8Array.
* @return {Uint8Array} the content as an Uint8Array.
*/
asUint8Array : function () {
var result = getBinaryData(this);
return JSZip.utils.transformTo("uint8array", result);
},
/**
* Returns the content as an ArrayBuffer.
* @return {ArrayBuffer} the content as an ArrayBufer.
*/
asArrayBuffer : function () {
return this.asUint8Array().buffer;
}
};
/**
* Transform an integer into a string in hexadecimal.
* @private
* @param {number} dec the number to convert.
* @param {number} bytes the number of bytes to generate.
* @returns {string} the result.
*/
var decToHex = function(dec, bytes) {
var hex = "", i;
for(i = 0; i < bytes; i++) {
hex += String.fromCharCode(dec&0xff);
dec=dec>>>8;
}
return hex;
};
/**
* Merge the objects passed as parameters into a new one.
* @private
* @param {...Object} var_args All objects to merge.
* @return {Object} a new object with the data of the others.
*/
var extend = function () {
var result = {}, i, attr;
for (i = 0; i < arguments.length; i++) { // arguments is not enumerable in some browsers
for (attr in arguments[i]) {
if (arguments[i].hasOwnProperty(attr) && typeof result[attr] === "undefined") {
result[attr] = arguments[i][attr];
}
}
}
return result;
};
/**
* Transforms the (incomplete) options from the user into the complete
* set of options to create a file.
* @private
* @param {Object} o the options from the user.
* @return {Object} the complete set of options.
*/
var prepareFileAttrs = function (o) {
o = o || {};
if (o.base64 === true && o.binary == null) {
o.binary = true;
}
o = extend(o, JSZip.defaults);
o.date = o.date || new Date();
if (o.compression !== null) o.compression = o.compression.toUpperCase();
return o;
};
/**
* Add a file in the current folder.
* @private
* @param {string} name the name of the file
* @param {String|ArrayBuffer|Uint8Array|Buffer} data the data of the file
* @param {Object} o the options of the file
* @return {Object} the new file.
*/
var fileAdd = function (name, data, o) {
// be sure sub folders exist
var parent = parentFolder(name), dataType = JSZip.utils.getTypeOf(data);
if (parent) {
folderAdd.call(this, parent);
}
o = prepareFileAttrs(o);
if (o.dir || data === null || typeof data === "undefined") {
o.base64 = false;
o.binary = false;
data = null;
} else if (dataType === "string") {
if (o.binary && !o.base64) {
// optimizedBinaryString == true means that the file has already been filtered with a 0xFF mask
if (o.optimizedBinaryString !== true) {
// this is a string, not in a base64 format.
// Be sure that this is a correct "binary string"
data = JSZip.utils.string2binary(data);
}
}
} else { // arraybuffer, uint8array, ...
o.base64 = false;
o.binary = true;
if (!dataType && !(data instanceof JSZip.CompressedObject)) {
throw new Error("The data of '" + name + "' is in an unsupported format !");
}
// special case : it's way easier to work with Uint8Array than with ArrayBuffer
if (dataType === "arraybuffer") {
data = JSZip.utils.transformTo("uint8array", data);
}
}
return this.files[name] = new ZipObject(name, data, o);
};
/**
* Find the parent folder of the path.
* @private
* @param {string} path the path to use
* @return {string} the parent folder, or ""
*/
var parentFolder = function (path) {
if (path.slice(-1) == '/') {
path = path.substring(0, path.length - 1);
}
var lastSlash = path.lastIndexOf('/');
return (lastSlash > 0) ? path.substring(0, lastSlash) : "";
};
/**
* Add a (sub) folder in the current folder.
* @private
* @param {string} name the folder's name
* @return {Object} the new folder.
*/
var folderAdd = function (name) {
// Check the name ends with a /
if (name.slice(-1) != "/") {
name += "/"; // IE doesn't like substr(-1)
}
// Does this folder already exist?
if (!this.files[name]) {
fileAdd.call(this, name, null, {dir:true});
}
return this.files[name];
};
/**
* Generate a JSZip.CompressedObject for a given zipOject.
* @param {ZipObject} file the object to read.
* @param {JSZip.compression} compression the compression to use.
* @return {JSZip.CompressedObject} the compressed result.
*/
var generateCompressedObjectFrom = function (file, compression) {
var result = new JSZip.CompressedObject(), content;
// the data has not been decompressed, we might reuse things !
if (file._data instanceof JSZip.CompressedObject) {
result.uncompressedSize = file._data.uncompressedSize;
result.crc32 = file._data.crc32;
if (result.uncompressedSize === 0 || file.options.dir) {
compression = JSZip.compressions['STORE'];
result.compressedContent = "";
result.crc32 = 0;
} else if (file._data.compressionMethod === compression.magic) {
result.compressedContent = file._data.getCompressedContent();
} else {
content = file._data.getContent()
// need to decompress / recompress
result.compressedContent = compression.compress(JSZip.utils.transformTo(compression.compressInputType, content));
}
} else {
// have uncompressed data
content = getBinaryData(file);
if (!content || content.length === 0 || file.options.dir) {
compression = JSZip.compressions['STORE'];
content = "";
}
result.uncompressedSize = content.length;
result.crc32 = this.crc32(content);
result.compressedContent = compression.compress(JSZip.utils.transformTo(compression.compressInputType, content));
}
result.compressedSize = result.compressedContent.length;
result.compressionMethod = compression.magic;
return result;
};
/**
* Generate the various parts used in the construction of the final zip file.
* @param {string} name the file name.
* @param {ZipObject} file the file content.
* @param {JSZip.CompressedObject} compressedObject the compressed object.
* @param {number} offset the current offset from the start of the zip file.
* @return {object} the zip parts.
*/
var generateZipParts = function(name, file, compressedObject, offset) {
var data = compressedObject.compressedContent,
utfEncodedFileName = this.utf8encode(file.name),
useUTF8 = utfEncodedFileName !== file.name,
o = file.options,
dosTime,
dosDate;
// date
// @see http://www.delorie.com/djgpp/doc/rbinter/it/52/13.html
// @see http://www.delorie.com/djgpp/doc/rbinter/it/65/16.html
// @see http://www.delorie.com/djgpp/doc/rbinter/it/66/16.html
dosTime = o.date.getHours();
dosTime = dosTime << 6;
dosTime = dosTime | o.date.getMinutes();
dosTime = dosTime << 5;
dosTime = dosTime | o.date.getSeconds() / 2;
dosDate = o.date.getFullYear() - 1980;
dosDate = dosDate << 4;
dosDate = dosDate | (o.date.getMonth() + 1);
dosDate = dosDate << 5;
dosDate = dosDate | o.date.getDate();
var header = "";
// version needed to extract
header += "\x0A\x00";
// general purpose bit flag
// set bit 11 if utf8
header += useUTF8 ? "\x00\x08" : "\x00\x00";
// compression method
header += compressedObject.compressionMethod;
// last mod file time
header += decToHex(dosTime, 2);
// last mod file date
header += decToHex(dosDate, 2);
// crc-32
header += decToHex(compressedObject.crc32, 4);
// compressed size
header += decToHex(compressedObject.compressedSize, 4);
// uncompressed size
header += decToHex(compressedObject.uncompressedSize, 4);
// file name length
header += decToHex(utfEncodedFileName.length, 2);
// extra field length
header += "\x00\x00";
var fileRecord = JSZip.signature.LOCAL_FILE_HEADER + header + utfEncodedFileName;
var dirRecord = JSZip.signature.CENTRAL_FILE_HEADER +
// version made by (00: DOS)
"\x14\x00" +
// file header (common to file and central directory)
header +
// file comment length
"\x00\x00" +
// disk number start
"\x00\x00" +
// internal file attributes TODO
"\x00\x00" +
// external file attributes
(file.options.dir===true?"\x10\x00\x00\x00":"\x00\x00\x00\x00")+
// relative offset of local header
decToHex(offset, 4) +
// file name
utfEncodedFileName;
return {
fileRecord : fileRecord,
dirRecord : dirRecord,
compressedObject : compressedObject
};
};
/**
* An object to write any content to a string.
* @constructor
*/
var StringWriter = function () {
this.data = [];
};
StringWriter.prototype = {
/**
* Append any content to the current string.
* @param {Object} input the content to add.
*/
append : function (input) {
input = JSZip.utils.transformTo("string", input);
this.data.push(input);
},
/**
* Finalize the construction an return the result.
* @return {string} the generated string.
*/
finalize : function () {
return this.data.join("");
}
};
/**
* An object to write any content to an Uint8Array.
* @constructor
* @param {number} length The length of the array.
*/
var Uint8ArrayWriter = function (length) {
this.data = new Uint8Array(length);
this.index = 0;
};
Uint8ArrayWriter.prototype = {
/**
* Append any content to the current array.
* @param {Object} input the content to add.
*/
append : function (input) {
if (input.length !== 0) {
// with an empty Uint8Array, Opera fails with a "Offset larger than array size"
input = JSZip.utils.transformTo("uint8array", input);
this.data.set(input, this.index);
this.index += input.length;
}
},
/**
* Finalize the construction an return the result.
* @return {Uint8Array} the generated array.
*/
finalize : function () {
return this.data;
}
};
// return the actual prototype of JSZip
return {
/**
* Read an existing zip and merge the data in the current JSZip object.
* The implementation is in jszip-load.js, don't forget to include it.
* @param {String|ArrayBuffer|Uint8Array|Buffer} stream The stream to load
* @param {Object} options Options for loading the stream.
* options.base64 : is the stream in base64 ? default : false
* @return {JSZip} the current JSZip object
*/
load : function (stream, options) {
throw new Error("Load method is not defined. Is the file jszip-load.js included ?");
},
/**
* Filter nested files/folders with the specified function.
* @param {Function} search the predicate to use :
* function (relativePath, file) {...}
* It takes 2 arguments : the relative path and the file.
* @return {Array} An array of matching elements.
*/
filter : function (search) {
var result = [], filename, relativePath, file, fileClone;
for (filename in this.files) {
if ( !this.files.hasOwnProperty(filename) ) { continue; }
file = this.files[filename];
// return a new object, don't let the user mess with our internal objects :)
fileClone = new ZipObject(file.name, file._data, extend(file.options));
relativePath = filename.slice(this.root.length, filename.length);
if (filename.slice(0, this.root.length) === this.root && // the file is in the current root
search(relativePath, fileClone)) { // and the file matches the function
result.push(fileClone);
}
}
return result;
},
/**
* Add a file to the zip file, or search a file.
* @param {string|RegExp} name The name of the file to add (if data is defined),
* the name of the file to find (if no data) or a regex to match files.
* @param {String|ArrayBuffer|Uint8Array|Buffer} data The file data, either raw or base64 encoded
* @param {Object} o File options
* @return {JSZip|Object|Array} this JSZip object (when adding a file),
* a file (when searching by string) or an array of files (when searching by regex).
*/
file : function(name, data, o) {
if (arguments.length === 1) {
if (name instanceof RegExp) {
var regexp = name;
return this.filter(function(relativePath, file) {
return !file.options.dir && regexp.test(relativePath);
});
} else { // text
return this.filter(function (relativePath, file) {
return !file.options.dir && relativePath === name;
})[0]||null;
}
} else { // more than one argument : we have data !
name = this.root+name;
fileAdd.call(this, name, data, o);
}
return this;
},
/**
* Add a directory to the zip file, or search.
* @param {String|RegExp} arg The name of the directory to add, or a regex to search folders.
* @return {JSZip} an object with the new directory as the root, or an array containing matching folders.
*/
folder : function(arg) {
if (!arg) {
return this;
}
if (arg instanceof RegExp) {
return this.filter(function(relativePath, file) {
return file.options.dir && arg.test(relativePath);
});
}
// else, name is a new folder
var name = this.root + arg;
var newFolder = folderAdd.call(this, name);
// Allow chaining by returning a new object with this folder as the root
var ret = this.clone();
ret.root = newFolder.name;
return ret;
},
/**
* Delete a file, or a directory and all sub-files, from the zip
* @param {string} name the name of the file to delete
* @return {JSZip} this JSZip object
*/
remove : function(name) {
name = this.root + name;
var file = this.files[name];
if (!file) {
// Look for any folders
if (name.slice(-1) != "/") {
name += "/";
}
file = this.files[name];
}
if (file) {
if (!file.options.dir) {
// file
delete this.files[name];
} else {
// folder
var kids = this.filter(function (relativePath, file) {
return file.name.slice(0, name.length) === name;
});
for (var i = 0; i < kids.length; i++) {
delete this.files[kids[i].name];
}
}
}
return this;
},
/**
* Generate the complete zip file
* @param {Object} options the options to generate the zip file :
* - base64, (deprecated, use type instead) true to generate base64.
* - compression, "STORE" by default.
* - type, "base64" by default. Values are : string, base64, uint8array, arraybuffer, blob.
* @return {String|Uint8Array|ArrayBuffer|Buffer|Blob} the zip file
*/
generate : function(options) {
options = extend(options || {}, {
base64 : true,
compression : "STORE",
type : "base64"
});
JSZip.utils.checkSupport(options.type);
var zipData = [], localDirLength = 0, centralDirLength = 0, writer, i;
// first, generate all the zip parts.
for (var name in this.files) {
if ( !this.files.hasOwnProperty(name) ) { continue; }
var file = this.files[name];
var compressionName = file.compression || options.compression.toUpperCase();
var compression = JSZip.compressions[compressionName];
if (!compression) {
throw new Error(compressionName + " is not a valid compression method !");
}
var compressedObject = generateCompressedObjectFrom.call(this, file, compression);
var zipPart = generateZipParts.call(this, name, file, compressedObject, localDirLength);
localDirLength += zipPart.fileRecord.length + compressedObject.compressedSize;
centralDirLength += zipPart.dirRecord.length;
zipData.push(zipPart);
}
var dirEnd = "";
// end of central dir signature
dirEnd = JSZip.signature.CENTRAL_DIRECTORY_END +
// number of this disk
"\x00\x00" +
// number of the disk with the start of the central directory
"\x00\x00" +
// total number of entries in the central directory on this disk
decToHex(zipData.length, 2) +
// total number of entries in the central directory
decToHex(zipData.length, 2) +
// size of the central directory 4 bytes
decToHex(centralDirLength, 4) +
// offset of start of central directory with respect to the starting disk number
decToHex(localDirLength, 4) +
// .ZIP file comment length
"\x00\x00";
// we have all the parts (and the total length)
// time to create a writer !
switch(options.type.toLowerCase()) {
case "uint8array" :
case "arraybuffer" :
case "blob" :
case "nodebuffer" :
writer = new Uint8ArrayWriter(localDirLength + centralDirLength + dirEnd.length);
break;
case "base64" :
default : // case "string" :
writer = new StringWriter(localDirLength + centralDirLength + dirEnd.length);
break;
}
for (i = 0; i < zipData.length; i++) {
writer.append(zipData[i].fileRecord);
writer.append(zipData[i].compressedObject.compressedContent);
}
for (i = 0; i < zipData.length; i++) {
writer.append(zipData[i].dirRecord);
}
writer.append(dirEnd);
var zip = writer.finalize();
switch(options.type.toLowerCase()) {
// case "zip is an Uint8Array"
case "uint8array" :
case "arraybuffer" :
case "nodebuffer" :
return JSZip.utils.transformTo(options.type.toLowerCase(), zip);
case "blob" :
return JSZip.utils.arrayBuffer2Blob(JSZip.utils.transformTo("arraybuffer", zip));
// case "zip is a string"
case "base64" :
return (options.base64) ? JSZip.base64.encode(zip) : zip;
default : // case "string" :
return zip;
}
},
/**
*
* Javascript crc32
* http://www.webtoolkit.info/
*
*/
crc32 : function crc32(input, crc) {
if (typeof input === "undefined" || !input.length) {
return 0;
}
var isArray = JSZip.utils.getTypeOf(input) !== "string";
var table = [
0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA,
0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
];
if (typeof(crc) == "undefined") { crc = 0; }
var x = 0;
var y = 0;
var byte = 0;
crc = crc ^ (-1);
for( var i = 0, iTop = input.length; i < iTop; i++ ) {
byte = isArray ? input[i] : input.charCodeAt(i);
y = ( crc ^ byte ) & 0xFF;
x = table[y];
crc = ( crc >>> 8 ) ^ x;
}
return crc ^ (-1);
},
// Inspired by http://my.opera.com/GreyWyvern/blog/show.dml/1725165
clone : function() {
var newObj = new JSZip();
for (var i in this) {
if (typeof this[i] !== "function") {
newObj[i] = this[i];
}
}
return newObj;
},
/**
* http://www.webtoolkit.info/javascript-utf8.html
*/
utf8encode : function (string) {
// TextEncoder + Uint8Array to binary string is faster than checking every bytes on long strings.
// http://jsperf.com/utf8encode-vs-textencoder
// On short strings (file names for example), the TextEncoder API is (currently) slower.
if (JSZip.support.uint8array && typeof TextEncoder === "function") {
var u8 = TextEncoder("utf-8").encode(string);
return JSZip.utils.transformTo("string", u8);
}
if (JSZip.support.nodebuffer) {
return JSZip.utils.transformTo("string", new Buffer(string, "utf-8"));
}
// array.join may be slower than string concatenation but generates less objects (less time spent garbage collecting).
// See also http://jsperf.com/array-direct-assignment-vs-push/31
var result = [], resIndex = 0;
for (var n = 0; n < string.length; n++) {
var c = string.charCodeAt(n);
if (c < 128) {
result[resIndex++] = String.fromCharCode(c);
} else if ((c > 127) && (c < 2048)) {
result[resIndex++] = String.fromCharCode((c >> 6) | 192);
result[resIndex++] = String.fromCharCode((c & 63) | 128);
} else {
result[resIndex++] = String.fromCharCode((c >> 12) | 224);
result[resIndex++] = String.fromCharCode(((c >> 6) & 63) | 128);
result[resIndex++] = String.fromCharCode((c & 63) | 128);
}
}
return result.join("");
},
/**
* http://www.webtoolkit.info/javascript-utf8.html
*/
utf8decode : function (input) {
var result = [], resIndex = 0;
var type = JSZip.utils.getTypeOf(input);
var isArray = type !== "string";
var i = 0;
var c = 0, c1 = 0, c2 = 0, c3 = 0;
// check if we can use the TextDecoder API
// see http://encoding.spec.whatwg.org/#api
if (JSZip.support.uint8array && typeof TextDecoder === "function") {
return TextDecoder("utf-8").decode(
JSZip.utils.transformTo("uint8array", input)
);
}
if (JSZip.support.nodebuffer) {
return JSZip.utils.transformTo("nodebuffer", input).toString("utf-8");
}
while ( i < input.length ) {
c = isArray ? input[i] : input.charCodeAt(i);
if (c < 128) {
result[resIndex++] = String.fromCharCode(c);
i++;
} else if ((c > 191) && (c < 224)) {
c2 = isArray ? input[i+1] : input.charCodeAt(i+1);
result[resIndex++] = String.fromCharCode(((c & 31) << 6) | (c2 & 63));
i += 2;
} else {
c2 = isArray ? input[i+1] : input.charCodeAt(i+1);
c3 = isArray ? input[i+2] : input.charCodeAt(i+2);
result[resIndex++] = String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
i += 3;
}
}
return result.join("");
}
};
}());
/*
* Compression methods
* This object is filled in as follow :
* name : {
* magic // the 2 bytes indentifying the compression method
* compress // function, take the uncompressed content and return it compressed.
* uncompress // function, take the compressed content and return it uncompressed.
* compressInputType // string, the type accepted by the compress method. null to accept everything.
* uncompressInputType // string, the type accepted by the uncompress method. null to accept everything.
* }
*
* STORE is the default compression method, so it's included in this file.
* Other methods should go to separated files : the user wants modularity.
*/
JSZip.compressions = {
"STORE" : {
magic : "\x00\x00",
compress : function (content) {
return content; // no compression
},
uncompress : function (content) {
return content; // no compression
},
compressInputType : null,
uncompressInputType : null
}
};
/*
* List features that require a modern browser, and if the current browser support them.
*/
JSZip.support = {
// contains true if JSZip can read/generate ArrayBuffer, false otherwise.
arraybuffer : (function(){
return typeof ArrayBuffer !== "undefined" && typeof Uint8Array !== "undefined";
})(),
// contains true if JSZip can read/generate nodejs Buffer, false otherwise.
nodebuffer : (function(){
return typeof Buffer !== "undefined";
})(),
// contains true if JSZip can read/generate Uint8Array, false otherwise.
uint8array : (function(){
return typeof Uint8Array !== "undefined";
})(),
// contains true if JSZip can read/generate Blob, false otherwise.
blob : (function(){
// the spec started with BlobBuilder then replaced it with a construtor for Blob.
// Result : we have browsers that :
// * know the BlobBuilder (but with prefix)
// * know the Blob constructor
// * know about Blob but not about how to build them
// About the "=== 0" test : if given the wrong type, it may be converted to a string.
// Instead of an empty content, we will get "[object Uint8Array]" for example.
if (typeof ArrayBuffer === "undefined") {
return false;
}
var buffer = new ArrayBuffer(0);
try {
return new Blob([buffer], { type: "application/zip" }).size === 0;
}
catch(e) {}
try {
var builder = new (window.BlobBuilder || window.WebKitBlobBuilder ||
window.MozBlobBuilder || window.MSBlobBuilder)();
builder.append(buffer);
return builder.getBlob('application/zip').size === 0;
}
catch(e) {}
return false;
})()
};
(function () {
JSZip.utils = {
/**
* Convert a string to a "binary string" : a string containing only char codes between 0 and 255.
* @param {string} str the string to transform.
* @return {String} the binary string.
*/
string2binary : function (str) {
var result = "";
for (var i = 0; i < str.length; i++) {
result += String.fromCharCode(str.charCodeAt(i) & 0xff);
}
return result;
},
/**
* Create a Uint8Array from the string.
* @param {string} str the string to transform.
* @return {Uint8Array} the typed array.
* @throws {Error} an Error if the browser doesn't support the requested feature.
* @deprecated : use JSZip.utils.transformTo instead.
*/
string2Uint8Array : function (str) {
return JSZip.utils.transformTo("uint8array", str);
},
/**
* Create a string from the Uint8Array.
* @param {Uint8Array} array the array to transform.
* @return {string} the string.
* @throws {Error} an Error if the browser doesn't support the requested feature.
* @deprecated : use JSZip.utils.transformTo instead.
*/
uint8Array2String : function (array) {
return JSZip.utils.transformTo("string", array);
},
/**
* Create a blob from the given ArrayBuffer.
* @param {ArrayBuffer} buffer the buffer to transform.
* @return {Blob} the result.
* @throws {Error} an Error if the browser doesn't support the requested feature.
*/
arrayBuffer2Blob : function (buffer) {
JSZip.utils.checkSupport("blob");
try {
// Blob constructor
return new Blob([buffer], { type: "application/zip" });
}
catch(e) {}
try {
// deprecated, browser only, old way
var builder = new (window.BlobBuilder || window.WebKitBlobBuilder ||
window.MozBlobBuilder || window.MSBlobBuilder)();
builder.append(buffer);
return builder.getBlob('application/zip');
}
catch(e) {}
// well, fuck ?!
throw new Error("Bug : can't construct the Blob.");
},
/**
* Create a blob from the given string.
* @param {string} str the string to transform.
* @return {Blob} the result.
* @throws {Error} an Error if the browser doesn't support the requested feature.
*/
string2Blob : function (str) {
var buffer = JSZip.utils.transformTo("arraybuffer", str);
return JSZip.utils.arrayBuffer2Blob(buffer);
}
};
/**
* The identity function.
* @param {Object} input the input.
* @return {Object} the same input.
*/
function identity(input) {
return input;
};
/**
* Fill in an array with a string.
* @param {String} str the string to use.
* @param {Array|ArrayBuffer|Uint8Array|Buffer} array the array to fill in (will be mutated).
* @return {Array|ArrayBuffer|Uint8Array|Buffer} the updated array.
*/
function stringToArrayLike(str, array) {
for (var i = 0; i < str.length; ++i) {
array[i] = str.charCodeAt(i) & 0xFF;
}
return array;
};
/**
* Transform an array-like object to a string.
* @param {Array|ArrayBuffer|Uint8Array|Buffer} array the array to transform.
* @return {String} the result.
*/
function arrayLikeToString(array) {
// Performances notes :
// --------------------
// String.fromCharCode.apply(null, array) is the fastest, see
// see http://jsperf.com/converting-a-uint8array-to-a-string/2
// but the stack is limited (and we can get huge arrays !).
//
// result += String.fromCharCode(array[i]); generate too many strings !
//
// This code is inspired by http://jsperf.com/arraybuffer-to-string-apply-performance/2
var chunk = 65536;
var result = [], len = array.length, type = JSZip.utils.getTypeOf(array), k = 0;
while (k < len && chunk > 1) {
try {
if (type === "array" || type === "nodebuffer") {
result.push(String.fromCharCode.apply(null, array.slice(k, Math.max(k + chunk, len))));
} else {
result.push(String.fromCharCode.apply(null, array.subarray(k, k + chunk)));
}
k += chunk;
} catch (e) {
chunk = Math.floor(chunk / 2);
}
}
return result.join("");
};
/**
* Copy the data from an array-like to an other array-like.
* @param {Array|ArrayBuffer|Uint8Array|Buffer} arrayFrom the origin array.
* @param {Array|ArrayBuffer|Uint8Array|Buffer} arrayTo the destination array which will be mutated.
* @return {Array|ArrayBuffer|Uint8Array|Buffer} the updated destination array.
*/
function arrayLikeToArrayLike(arrayFrom, arrayTo) {
for(var i = 0; i < arrayFrom.length; i++) {
arrayTo[i] = arrayFrom[i];
}
return arrayTo;
};
// a matrix containing functions to transform everything into everything.
var transform = {};
// string to ?
transform["string"] = {
"string" : identity,
"array" : function (input) {
return stringToArrayLike(input, new Array(input.length));
},
"arraybuffer" : function (input) {
return transform["string"]["uint8array"](input).buffer;
},
"uint8array" : function (input) {
return stringToArrayLike(input, new Uint8Array(input.length));
},
"nodebuffer" : function (input) {
return stringToArrayLike(input, new Buffer(input.length));
}
};
// array to ?
transform["array"] = {
"string" : arrayLikeToString,
"array" : identity,
"arraybuffer" : function (input) {
return (new Uint8Array(input)).buffer;
},
"uint8array" : function (input) {
return new Uint8Array(input);
},
"nodebuffer" : function (input) {
return new Buffer(input);
}
};
// arraybuffer to ?
transform["arraybuffer"] = {
"string" : function (input) {
return arrayLikeToString(new Uint8Array(input));
},
"array" : function (input) {
return arrayLikeToArrayLike(new Uint8Array(input), new Array(input.byteLength));
},
"arraybuffer" : identity,
"uint8array" : function (input) {
return new Uint8Array(input);
},
"nodebuffer" : function (input) {
return new Buffer(new Uint8Array(input));
}
};
// uint8array to ?
transform["uint8array"] = {
"string" : arrayLikeToString,
"array" : function (input) {
return arrayLikeToArrayLike(input, new Array(input.length));
},
"arraybuffer" : function (input) {
return input.buffer;
},
"uint8array" : identity,
"nodebuffer" : function(input) {
return new Buffer(input);
}
};
// nodebuffer to ?
transform["nodebuffer"] = {
"string" : arrayLikeToString,
"array" : function (input) {
return arrayLikeToArrayLike(input, new Array(input.length));
},
"arraybuffer" : function (input) {
return transform["nodebuffer"]["uint8array"](input).buffer;
},
"uint8array" : function (input) {
return arrayLikeToArrayLike(input, new Uint8Array(input.length));
},
"nodebuffer" : identity
};
/**
* Transform an input into any type.
* The supported output type are : string, array, uint8array, arraybuffer, nodebuffer.
* If no output type is specified, the unmodified input will be returned.
* @param {String} outputType the output type.
* @param {String|Array|ArrayBuffer|Uint8Array|Buffer} input the input to convert.
* @throws {Error} an Error if the browser doesn't support the requested output type.
*/
JSZip.utils.transformTo = function (outputType, input) {
if (!input) {
// undefined, null, etc
// an empty string won't harm.
input = "";
}
if (!outputType) {
return input;
}
JSZip.utils.checkSupport(outputType);
var inputType = JSZip.utils.getTypeOf(input);
var result = transform[inputType][outputType](input);
return result;
};
/**
* Return the type of the input.
* The type will be in a format valid for JSZip.utils.transformTo : string, array, uint8array, arraybuffer.
* @param {Object} input the input to identify.
* @return {String} the (lowercase) type of the input.
*/
JSZip.utils.getTypeOf = function (input) {
if (typeof input === "string") {
return "string";
}
if (input instanceof Array) {
return "array";
}
if (JSZip.support.nodebuffer && Buffer.isBuffer(input)) {
return "nodebuffer";
}
if (JSZip.support.uint8array && input instanceof Uint8Array) {
return "uint8array";
}
if (JSZip.support.arraybuffer && input instanceof ArrayBuffer) {
return "arraybuffer";
}
};
/**
* Throw an exception if the type is not supported.
* @param {String} type the type to check.
* @throws {Error} an Error if the browser doesn't support the requested type.
*/
JSZip.utils.checkSupport = function (type) {
var supported = true;
switch (type.toLowerCase()) {
case "uint8array":
supported = JSZip.support.uint8array;
break;
case "arraybuffer":
supported = JSZip.support.arraybuffer;
break;
case "nodebuffer":
supported = JSZip.support.nodebuffer;
break;
case "blob":
supported = JSZip.support.blob;
break;
}
if (!supported) {
throw new Error(type + " is not supported by this browser");
}
};
})();
(function (){
/**
* Represents an entry in the zip.
* The content may or may not be compressed.
* @constructor
*/
JSZip.CompressedObject = function () {
this.compressedSize = 0;
this.uncompressedSize = 0;
this.crc32 = 0;
this.compressionMethod = null;
this.compressedContent = null;
};
JSZip.CompressedObject.prototype = {
/**
* Return the decompressed content in an unspecified format.
* The format will depend on the decompressor.
* @return {Object} the decompressed content.
*/
getContent : function () {
return null; // see implementation
},
/**
* Return the compressed content in an unspecified format.
* The format will depend on the compressed conten source.
* @return {Object} the compressed content.
*/
getCompressedContent : function () {
return null; // see implementation
}
};
})();
/**
*
* Base64 encode / decode
* http://www.webtoolkit.info/
*
* Hacked so that it doesn't utf8 en/decode everything
**/
JSZip.base64 = (function() {
// private property
var _keyStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
return {
// public method for encoding
encode : function(input, utf8) {
var output = "";
var chr1, chr2, chr3, enc1, enc2, enc3, enc4;
var i = 0;
while (i < input.length) {
chr1 = input.charCodeAt(i++);
chr2 = input.charCodeAt(i++);
chr3 = input.charCodeAt(i++);
enc1 = chr1 >> 2;
enc2 = ((chr1 & 3) << 4) | (chr2 >> 4);
enc3 = ((chr2 & 15) << 2) | (chr3 >> 6);
enc4 = chr3 & 63;
if (isNaN(chr2)) {
enc3 = enc4 = 64;
} else if (isNaN(chr3)) {
enc4 = 64;
}
output = output +
_keyStr.charAt(enc1) + _keyStr.charAt(enc2) +
_keyStr.charAt(enc3) + _keyStr.charAt(enc4);
}
return output;
},
// public method for decoding
decode : function(input, utf8) {
var output = "";
var chr1, chr2, chr3;
var enc1, enc2, enc3, enc4;
var i = 0;
input = input.replace(/[^A-Za-z0-9\+\/\=]/g, "");
while (i < input.length) {
enc1 = _keyStr.indexOf(input.charAt(i++));
enc2 = _keyStr.indexOf(input.charAt(i++));
enc3 = _keyStr.indexOf(input.charAt(i++));
enc4 = _keyStr.indexOf(input.charAt(i++));
chr1 = (enc1 << 2) | (enc2 >> 4);
chr2 = ((enc2 & 15) << 4) | (enc3 >> 2);
chr3 = ((enc3 & 3) << 6) | enc4;
output = output + String.fromCharCode(chr1);
if (enc3 != 64) {
output = output + String.fromCharCode(chr2);
}
if (enc4 != 64) {
output = output + String.fromCharCode(chr3);
}
}
return output;
}
};
}());
// enforcing Stuk's coding style
// vim: set shiftwidth=3 softtabstop=3:
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