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936 lines
31 KiB
JavaScript
Executable File
936 lines
31 KiB
JavaScript
Executable File
/**
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JSZip - A Javascript class for generating and reading zip files
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<http://stuartk.com/jszip>
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(c) 2009-2012 Stuart Knightley <stuart [at] stuartk.com>
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Dual licenced under the MIT license or GPLv3. See LICENSE.markdown.
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Usage:
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zip = new JSZip();
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zip.file("hello.txt", "Hello, World!").add("tempfile", "nothing");
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zip.folder("images").file("smile.gif", base64Data, {base64: true});
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zip.file("Xmas.txt", "Ho ho ho !", {date : new Date("December 25, 2007 00:00:01")});
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zip.remove("tempfile");
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base64zip = zip.generate();
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**/
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/**
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* Representation a of zip file in js
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* @constructor
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* @param {String=|ArrayBuffer=|Uint8Array=} data the data to load, if any (optional).
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* @param {Object=} options the options for creating this objects (optional).
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*/
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var JSZip = function(data, options) {
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// object containing the files :
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// {
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// "folder/" : {...},
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// "folder/data.txt" : {...}
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// }
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this.files = {};
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// Where we are in the hierarchy
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this.root = "";
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if (data) {
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this.load(data, options);
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}
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};
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JSZip.signature = {
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LOCAL_FILE_HEADER : "\x50\x4b\x03\x04",
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CENTRAL_FILE_HEADER : "\x50\x4b\x01\x02",
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CENTRAL_DIRECTORY_END : "\x50\x4b\x05\x06",
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ZIP64_CENTRAL_DIRECTORY_LOCATOR : "\x50\x4b\x06\x07",
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ZIP64_CENTRAL_DIRECTORY_END : "\x50\x4b\x06\x06",
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DATA_DESCRIPTOR : "\x50\x4b\x07\x08"
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};
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// Default properties for a new file
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JSZip.defaults = {
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base64: false,
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binary: false,
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dir: false,
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date: null
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};
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JSZip.prototype = (function () {
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/**
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* A simple object representing a file in the zip file.
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* @constructor
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* @param {string} name the name of the file
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* @param {string} data the data
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* @param {Object} options the options of the file
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*/
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var ZipObject = function (name, data, options) {
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this.name = name;
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this.data = data;
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this.options = options;
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};
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ZipObject.prototype = {
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/**
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* Return the content as UTF8 string.
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* @return {string} the UTF8 string.
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*/
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asText : function () {
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var result = this.data;
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if (this.options.base64) {
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result = JSZipBase64.decode(result);
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}
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if (this.options.binary) {
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result = JSZip.prototype.utf8decode(result);
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}
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return result;
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},
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/**
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* Returns the binary content.
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* @return {string} the content as binary.
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*/
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asBinary : function () {
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var result = this.data;
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if (this.options.base64) {
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result = JSZipBase64.decode(result);
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}
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if (!this.options.binary) {
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result = JSZip.prototype.utf8encode(result);
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}
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return result;
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},
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/**
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* Returns the content as an Uint8Array.
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* @return {Uint8Array} the content as an Uint8Array.
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*/
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asUint8Array : function () {
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return JSZip.utils.string2Uint8Array(this.asBinary());
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},
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/**
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* Returns the content as an ArrayBuffer.
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* @return {ArrayBuffer} the content as an ArrayBufer.
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*/
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asArrayBuffer : function () {
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return JSZip.utils.string2Uint8Array(this.asBinary()).buffer;
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}
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};
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/**
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* Transform an integer into a string in hexadecimal.
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* @private
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* @param {number} dec the number to convert.
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* @param {number} bytes the number of bytes to generate.
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* @returns {string} the result.
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*/
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var decToHex = function(dec, bytes) {
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var hex = "", i;
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for(i = 0; i < bytes; i++) {
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hex += String.fromCharCode(dec&0xff);
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dec=dec>>>8;
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}
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return hex;
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};
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/**
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* Merge the objects passed as parameters into a new one.
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* @private
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* @param {...Object} var_args All objects to merge.
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* @return {Object} a new object with the data of the others.
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*/
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var extend = function () {
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var result = {}, i, attr;
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for (i = 0; i < arguments.length; i++) { // arguments is not enumerable in some browsers
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for (attr in arguments[i]) {
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if (arguments[i].hasOwnProperty(attr) && typeof result[attr] === "undefined") {
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result[attr] = arguments[i][attr];
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}
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}
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}
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return result;
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};
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/**
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* Transforms the (incomplete) options from the user into the complete
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* set of options to create a file.
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* @private
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* @param {Object} o the options from the user.
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* @return {Object} the complete set of options.
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*/
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var prepareFileAttrs = function (o) {
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o = o || {};
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if (o.base64 === true && o.binary == null) {
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o.binary = true;
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}
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o = extend(o, JSZip.defaults);
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o.date = o.date || new Date();
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return o;
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};
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/**
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* Add a file in the current folder.
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* @private
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* @param {string} name the name of the file
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* @param {String|ArrayBuffer|Uint8Array} data the data of the file
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* @param {Object} o the options of the file
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* @return {Object} the new file.
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*/
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var fileAdd = function (name, data, o) {
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// be sure sub folders exist
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var parent = parentFolder(name);
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if (parent) {
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folderAdd.call(this, parent);
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}
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o = prepareFileAttrs(o);
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if (JSZip.support.uint8array && data instanceof Uint8Array) {
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o.base64 = false;
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o.binary = true;
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data = JSZip.utils.uint8Array2String(data);
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} else if (JSZip.support.arraybuffer && data instanceof ArrayBuffer) {
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o.base64 = false;
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o.binary = true;
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var bufferView = new Uint8Array(data);
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data = JSZip.utils.uint8Array2String(bufferView);
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} else if (o.binary && !o.base64) {
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// optimizedBinaryString == true means that the file has already been filtered with a 0xFF mask
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if (o.optimizedBinaryString !== true) {
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// this is a string, not in a base64 format.
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// Be sure that this is a correct "binary string"
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data = JSZip.utils.string2binary(data);
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}
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// we remove this option since it's only relevant here
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delete o.optimizedBinaryString;
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}
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return this.files[name] = new ZipObject(name, data, o);
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};
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/**
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* Find the parent folder of the path.
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* @private
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* @param {string} path the path to use
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* @return {string} the parent folder, or ""
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*/
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var parentFolder = function (path) {
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if (path.slice(-1) == '/') {
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path = path.substring(0, path.length - 1);
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}
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var lastSlash = path.lastIndexOf('/');
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return (lastSlash > 0) ? path.substring(0, lastSlash) : "";
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};
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/**
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* Add a (sub) folder in the current folder.
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* @private
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* @param {string} name the folder's name
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* @return {Object} the new folder.
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*/
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var folderAdd = function (name) {
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// Check the name ends with a /
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if (name.slice(-1) != "/") {
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name += "/"; // IE doesn't like substr(-1)
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}
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// Does this folder already exist?
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if (!this.files[name]) {
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// be sure sub folders exist
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var parent = parentFolder(name);
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if (parent) {
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folderAdd.call(this, parent);
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}
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fileAdd.call(this, name, '', {dir:true});
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}
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return this.files[name];
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};
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/**
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* Generate the data found in the local header of a zip file.
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* Do not create it now, as some parts are re-used later.
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* @private
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* @param {Object} file the file to use.
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* @param {string} utfEncodedFileName the file name, utf8 encoded.
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* @param {string} compressionType the compression to use.
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* @return {Object} an object containing header and compressedData.
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*/
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var prepareLocalHeaderData = function(file, utfEncodedFileName, compressionType) {
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var useUTF8 = utfEncodedFileName !== file.name,
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data = file.asBinary(),
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o = file.options,
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dosTime,
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dosDate;
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// date
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// @see http://www.delorie.com/djgpp/doc/rbinter/it/52/13.html
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// @see http://www.delorie.com/djgpp/doc/rbinter/it/65/16.html
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// @see http://www.delorie.com/djgpp/doc/rbinter/it/66/16.html
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dosTime = o.date.getHours();
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dosTime = dosTime << 6;
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dosTime = dosTime | o.date.getMinutes();
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dosTime = dosTime << 5;
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dosTime = dosTime | o.date.getSeconds() / 2;
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dosDate = o.date.getFullYear() - 1980;
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dosDate = dosDate << 4;
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dosDate = dosDate | (o.date.getMonth() + 1);
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dosDate = dosDate << 5;
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dosDate = dosDate | o.date.getDate();
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var compression = JSZip.compressions[compressionType];
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var compressedData = compression.compress(data);
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var header = "";
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// version needed to extract
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header += "\x0A\x00";
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// general purpose bit flag
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// set bit 11 if utf8
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header += useUTF8 ? "\x00\x08" : "\x00\x00";
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// compression method
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header += compression.magic;
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// last mod file time
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header += decToHex(dosTime, 2);
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// last mod file date
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header += decToHex(dosDate, 2);
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// crc-32
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header += decToHex(this.crc32(data), 4);
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// compressed size
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header += decToHex(compressedData.length, 4);
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// uncompressed size
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header += decToHex(data.length, 4);
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// file name length
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header += decToHex(utfEncodedFileName.length, 2);
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// extra field length
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header += "\x00\x00";
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return {
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header:header,
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compressedData:compressedData
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};
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};
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// return the actual prototype of JSZip
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return {
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/**
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* Read an existing zip and merge the data in the current JSZip object.
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* The implementation is in jszip-load.js, don't forget to include it.
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* @param {String|ArrayBuffer|Uint8Array} stream The stream to load
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* @param {Object} options Options for loading the stream.
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* options.base64 : is the stream in base64 ? default : false
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* @return {JSZip} the current JSZip object
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*/
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load : function (stream, options) {
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throw new Error("Load method is not defined. Is the file jszip-load.js included ?");
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},
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/**
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* Filter nested files/folders with the specified function.
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* @param {Function} search the predicate to use :
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* function (relativePath, file) {...}
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* It takes 2 arguments : the relative path and the file.
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* @return {Array} An array of matching elements.
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*/
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filter : function (search) {
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var result = [], filename, relativePath, file, fileClone;
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for (filename in this.files) {
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if ( !this.files.hasOwnProperty(filename) ) { continue; }
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file = this.files[filename];
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// return a new object, don't let the user mess with our internal objects :)
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fileClone = new ZipObject(file.name, file.data, extend(file.options));
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relativePath = filename.slice(this.root.length, filename.length);
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if (filename.slice(0, this.root.length) === this.root && // the file is in the current root
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search(relativePath, fileClone)) { // and the file matches the function
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result.push(fileClone);
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}
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}
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return result;
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},
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/**
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* Add a file to the zip file, or search a file.
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* @param {string|RegExp} name The name of the file to add (if data is defined),
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* the name of the file to find (if no data) or a regex to match files.
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* @param {String|ArrayBuffer|Uint8Array} data The file data, either raw or base64 encoded
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* @param {Object} o File options
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* @return {JSZip|Object|Array} this JSZip object (when adding a file),
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* a file (when searching by string) or an array of files (when searching by regex).
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*/
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file : function(name, data, o) {
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if (arguments.length === 1) {
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if (name instanceof RegExp) {
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var regexp = name;
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return this.filter(function(relativePath, file) {
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return !file.options.dir && regexp.test(relativePath);
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});
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} else { // text
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return this.filter(function (relativePath, file) {
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return !file.options.dir && relativePath === name;
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})[0]||null;
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}
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} else { // more than one argument : we have data !
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name = this.root+name;
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fileAdd.call(this, name, data, o);
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}
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return this;
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},
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/**
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* Add a directory to the zip file, or search.
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* @param {String|RegExp} arg The name of the directory to add, or a regex to search folders.
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* @return {JSZip} an object with the new directory as the root, or an array containing matching folders.
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*/
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folder : function(arg) {
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if (!arg) {
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return this;
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}
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if (arg instanceof RegExp) {
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return this.filter(function(relativePath, file) {
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return file.options.dir && arg.test(relativePath);
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});
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}
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// else, name is a new folder
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var name = this.root + arg;
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var newFolder = folderAdd.call(this, name);
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// Allow chaining by returning a new object with this folder as the root
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var ret = this.clone();
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ret.root = newFolder.name;
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return ret;
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},
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/**
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* Delete a file, or a directory and all sub-files, from the zip
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* @param {string} name the name of the file to delete
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* @return {JSZip} this JSZip object
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*/
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remove : function(name) {
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name = this.root + name;
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var file = this.files[name];
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if (!file) {
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// Look for any folders
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if (name.slice(-1) != "/") {
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name += "/";
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}
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file = this.files[name];
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}
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if (file) {
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if (!file.options.dir) {
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// file
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delete this.files[name];
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} else {
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// folder
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var kids = this.filter(function (relativePath, file) {
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return file.name.slice(0, name.length) === name;
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});
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for (var i = 0; i < kids.length; i++) {
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delete this.files[kids[i].name];
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}
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}
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}
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return this;
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},
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/**
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* Generate the complete zip file
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* @param {Object} options the options to generate the zip file :
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* - base64, (deprecated, use type instead) true to generate base64.
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* - compression, "STORE" by default.
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* - type, "base64" by default. Values are : string, base64, uint8array, arraybuffer, blob.
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* @return {String|Uint8Array|ArrayBuffer|Blob} the zip file
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*/
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generate : function(options) {
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options = extend(options || {}, {
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base64 : true,
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compression : "STORE",
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type : "base64"
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});
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var compression = options.compression.toUpperCase();
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// The central directory, and files data
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var directory = [], files = [], fileOffset = 0;
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if (!JSZip.compressions[compression]) {
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throw compression + " is not a valid compression method !";
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}
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for (var name in this.files) {
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if ( !this.files.hasOwnProperty(name) ) { continue; }
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var file = this.files[name];
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var utfEncodedFileName = this.utf8encode(file.name);
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var fileRecord = "",
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dirRecord = "",
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data = prepareLocalHeaderData.call(this, file, utfEncodedFileName, compression);
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fileRecord = JSZip.signature.LOCAL_FILE_HEADER + data.header + utfEncodedFileName + data.compressedData;
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dirRecord = JSZip.signature.CENTRAL_FILE_HEADER +
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// version made by (00: DOS)
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"\x14\x00" +
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// file header (common to file and central directory)
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data.header +
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// file comment length
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"\x00\x00" +
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// disk number start
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"\x00\x00" +
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// internal file attributes TODO
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"\x00\x00" +
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// external file attributes
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(this.files[name].options.dir===true?"\x10\x00\x00\x00":"\x00\x00\x00\x00")+
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// relative offset of local header
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decToHex(fileOffset, 4) +
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// file name
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utfEncodedFileName;
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fileOffset += fileRecord.length;
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files.push(fileRecord);
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directory.push(dirRecord);
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}
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var fileData = files.join("");
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var dirData = directory.join("");
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var dirEnd = "";
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// end of central dir signature
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dirEnd = JSZip.signature.CENTRAL_DIRECTORY_END +
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// number of this disk
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"\x00\x00" +
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// number of the disk with the start of the central directory
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"\x00\x00" +
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// total number of entries in the central directory on this disk
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decToHex(files.length, 2) +
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// total number of entries in the central directory
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decToHex(files.length, 2) +
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// size of the central directory 4 bytes
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decToHex(dirData.length, 4) +
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// offset of start of central directory with respect to the starting disk number
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decToHex(fileData.length, 4) +
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// .ZIP file comment length
|
|
"\x00\x00";
|
|
|
|
var zip = fileData + dirData + dirEnd;
|
|
|
|
|
|
switch(options.type.toLowerCase()) {
|
|
case "uint8array" :
|
|
return JSZip.utils.string2Uint8Array(zip);
|
|
case "arraybuffer" :
|
|
return JSZip.utils.string2Uint8Array(zip).buffer;
|
|
case "blob" :
|
|
return JSZip.utils.string2Blob(zip);
|
|
case "base64" :
|
|
return (options.base64) ? JSZipBase64.encode(zip) : zip;
|
|
default : // case "string" :
|
|
return zip;
|
|
}
|
|
},
|
|
|
|
/**
|
|
*
|
|
* Javascript crc32
|
|
* http://www.webtoolkit.info/
|
|
*
|
|
*/
|
|
crc32 : function(str, crc) {
|
|
|
|
if (str === "" || typeof str === "undefined") {
|
|
return 0;
|
|
}
|
|
|
|
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;
|
|
|
|
crc = crc ^ (-1);
|
|
for( var i = 0, iTop = str.length; i < iTop; i++ ) {
|
|
y = ( crc ^ str.charCodeAt( i ) ) & 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) {
|
|
string = string.replace(/\r\n/g,"\n");
|
|
var utftext = "";
|
|
|
|
for (var n = 0; n < string.length; n++) {
|
|
|
|
var c = string.charCodeAt(n);
|
|
|
|
if (c < 128) {
|
|
utftext += String.fromCharCode(c);
|
|
} else if ((c > 127) && (c < 2048)) {
|
|
utftext += String.fromCharCode((c >> 6) | 192);
|
|
utftext += String.fromCharCode((c & 63) | 128);
|
|
} else {
|
|
utftext += String.fromCharCode((c >> 12) | 224);
|
|
utftext += String.fromCharCode(((c >> 6) & 63) | 128);
|
|
utftext += String.fromCharCode((c & 63) | 128);
|
|
}
|
|
|
|
}
|
|
|
|
return utftext;
|
|
},
|
|
|
|
/**
|
|
* http://www.webtoolkit.info/javascript-utf8.html
|
|
*/
|
|
utf8decode : function (utftext) {
|
|
var string = "";
|
|
var i = 0;
|
|
var c = 0, c1 = 0, c2 = 0, c3 = 0;
|
|
|
|
while ( i < utftext.length ) {
|
|
|
|
c = utftext.charCodeAt(i);
|
|
|
|
if (c < 128) {
|
|
string += String.fromCharCode(c);
|
|
i++;
|
|
} else if ((c > 191) && (c < 224)) {
|
|
c2 = utftext.charCodeAt(i+1);
|
|
string += String.fromCharCode(((c & 31) << 6) | (c2 & 63));
|
|
i += 2;
|
|
} else {
|
|
c2 = utftext.charCodeAt(i+1);
|
|
c3 = utftext.charCodeAt(i+2);
|
|
string += String.fromCharCode(((c & 15) << 12) | ((c2 & 63) << 6) | (c3 & 63));
|
|
i += 3;
|
|
}
|
|
|
|
}
|
|
|
|
return string;
|
|
}
|
|
};
|
|
}());
|
|
|
|
/*
|
|
* 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.
|
|
* }
|
|
*
|
|
* 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
|
|
}
|
|
}
|
|
};
|
|
|
|
/*
|
|
* 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 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;
|
|
})()
|
|
};
|
|
|
|
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.
|
|
*/
|
|
string2Uint8Array : function (str) {
|
|
if (!JSZip.support.uint8array) {
|
|
throw new Error("Uint8Array is not supported by this browser");
|
|
}
|
|
var buffer = new ArrayBuffer(str.length);
|
|
var bufferView = new Uint8Array(buffer);
|
|
for(var i = 0; i < str.length; i++) {
|
|
bufferView[i] = str.charCodeAt(i);
|
|
}
|
|
|
|
return bufferView;
|
|
},
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
uint8Array2String : function (array) {
|
|
if (!JSZip.support.uint8array) {
|
|
throw new Error("Uint8Array is not supported by this browser");
|
|
}
|
|
var result = "";
|
|
for(var i = 0; i < array.length; i++) {
|
|
result += String.fromCharCode(array[i]);
|
|
}
|
|
|
|
return result;
|
|
},
|
|
/**
|
|
* Create a blob from the given string.
|
|
* @param {string} str the string to transform.
|
|
* @return {Blob} the string.
|
|
* @throws {Error} an Error if the browser doesn't support the requested feature.
|
|
*/
|
|
string2Blob : function (str) {
|
|
if (!JSZip.support.blob) {
|
|
throw new Error("Blob is not supported by this browser");
|
|
}
|
|
|
|
var buffer = JSZip.utils.string2Uint8Array(str).buffer;
|
|
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.");
|
|
}
|
|
};
|
|
|
|
/**
|
|
*
|
|
* Base64 encode / decode
|
|
* http://www.webtoolkit.info/
|
|
*
|
|
* Hacked so that it doesn't utf8 en/decode everything
|
|
**/
|
|
var JSZipBase64 = (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:
|