1475 lines
50 KiB
JavaScript
1475 lines
50 KiB
JavaScript
/**
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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!").file("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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// We use strict, but it should not be placed outside of a function because
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// the environment is shared inside the browser.
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// "use strict";
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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=|Buffer=} 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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compression: null
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};
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/*
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* List features that require a modern browser, and if the current browser support them.
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*/
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JSZip.support = {
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// contains true if JSZip can read/generate ArrayBuffer, false otherwise.
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arraybuffer : (function(){
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return typeof ArrayBuffer !== "undefined" && typeof Uint8Array !== "undefined";
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})(),
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// contains true if JSZip can read/generate nodejs Buffer, false otherwise.
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nodebuffer : (function(){
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return typeof Buffer !== "undefined";
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})(),
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// contains true if JSZip can read/generate Uint8Array, false otherwise.
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uint8array : (function(){
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return typeof Uint8Array !== "undefined";
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})(),
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// contains true if JSZip can read/generate Blob, false otherwise.
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blob : (function(){
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// the spec started with BlobBuilder then replaced it with a construtor for Blob.
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// Result : we have browsers that :
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// * know the BlobBuilder (but with prefix)
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// * know the Blob constructor
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// * know about Blob but not about how to build them
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// About the "=== 0" test : if given the wrong type, it may be converted to a string.
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// Instead of an empty content, we will get "[object Uint8Array]" for example.
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if (typeof ArrayBuffer === "undefined") {
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return false;
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}
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var buffer = new ArrayBuffer(0);
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try {
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return new Blob([buffer], { type: "application/zip" }).size === 0;
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}
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catch(e) {}
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try {
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var BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder || window.MSBlobBuilder;
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var builder = new BlobBuilder();
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builder.append(buffer);
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return builder.getBlob('application/zip').size === 0;
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}
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catch(e) {}
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return false;
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})()
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};
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JSZip.prototype = (function () {
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var textEncoder, textDecoder;
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if (
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JSZip.support.uint8array &&
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typeof TextEncoder === "function" &&
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typeof TextDecoder === "function"
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) {
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textEncoder = new TextEncoder("utf-8");
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textDecoder = new TextDecoder("utf-8");
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}
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/**
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* Returns the raw data of a ZipObject, decompress the content if necessary.
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* @param {ZipObject} file the file to use.
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* @return {String|ArrayBuffer|Uint8Array|Buffer} the data.
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*/
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var getRawData = function (file) {
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if (file._data instanceof JSZip.CompressedObject) {
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file._data = file._data.getContent();
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file.options.binary = true;
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file.options.base64 = false;
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if (JSZip.utils.getTypeOf(file._data) === "uint8array") {
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var copy = file._data;
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// when reading an arraybuffer, the CompressedObject mechanism will keep it and subarray() a Uint8Array.
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// if we request a file in the same format, we might get the same Uint8Array or its ArrayBuffer (the original zip file).
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file._data = new Uint8Array(copy.length);
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// with an empty Uint8Array, Opera fails with a "Offset larger than array size"
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if (copy.length !== 0) {
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file._data.set(copy, 0);
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}
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}
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}
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return file._data;
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};
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/**
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* Returns the data of a ZipObject in a binary form. If the content is an unicode string, encode it.
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* @param {ZipObject} file the file to use.
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* @return {String|ArrayBuffer|Uint8Array|Buffer} the data.
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*/
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var getBinaryData = function (file) {
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var result = getRawData(file), type = JSZip.utils.getTypeOf(result);
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if (type === "string") {
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if (!file.options.binary) {
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// unicode text !
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// unicode string => binary string is a painful process, check if we can avoid it.
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if (textEncoder) {
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return textEncoder.encode(result);
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}
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if (JSZip.support.nodebuffer) {
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return new Buffer(result, "utf-8");
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}
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}
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return file.asBinary();
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}
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return result;
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};
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/**
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* Transform this._data into a string.
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* @param {function} filter a function String -> String, applied if not null on the result.
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* @return {String} the string representing this._data.
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*/
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var dataToString = function (asUTF8) {
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var result = getRawData(this);
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if (result === null || typeof result === "undefined") {
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return "";
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}
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// if the data is a base64 string, we decode it before checking the encoding !
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if (this.options.base64) {
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result = JSZip.base64.decode(result);
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}
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if (asUTF8 && this.options.binary) {
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// JSZip.prototype.utf8decode supports arrays as input
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// skip to array => string step, utf8decode will do it.
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result = JSZip.prototype.utf8decode(result);
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} else {
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// no utf8 transformation, do the array => string step.
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result = JSZip.utils.transformTo("string", result);
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}
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if (!asUTF8 && !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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* 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|ArrayBuffer|Uint8Array|Buffer} 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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return dataToString.call(this, true);
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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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return dataToString.call(this, false);
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},
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/**
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* Returns the content as a nodejs Buffer.
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* @return {Buffer} the content as a Buffer.
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*/
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asNodeBuffer : function () {
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var result = getBinaryData(this);
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return JSZip.utils.transformTo("nodebuffer", 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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var result = getBinaryData(this);
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return JSZip.utils.transformTo("uint8array", result);
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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 this.asUint8Array().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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/*jshint -W041 */
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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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/*jshint +W041 */
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o = extend(o, JSZip.defaults);
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o.date = o.date || new Date();
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if (o.compression !== null) o.compression = o.compression.toUpperCase();
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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|Buffer} 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), dataType = JSZip.utils.getTypeOf(data);
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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 (o.dir || data === null || typeof data === "undefined") {
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o.base64 = false;
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o.binary = false;
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data = null;
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} else if (dataType === "string") {
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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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}
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} else { // arraybuffer, uint8array, ...
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o.base64 = false;
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o.binary = true;
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if (!dataType && !(data instanceof JSZip.CompressedObject)) {
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throw new Error("The data of '" + name + "' is in an unsupported format !");
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}
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// special case : it's way easier to work with Uint8Array than with ArrayBuffer
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if (dataType === "arraybuffer") {
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data = JSZip.utils.transformTo("uint8array", data);
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}
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}
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var object = new ZipObject(name, data, o);
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this.files[name] = object;
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return object;
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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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fileAdd.call(this, name, null, {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 a JSZip.CompressedObject for a given zipOject.
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* @param {ZipObject} file the object to read.
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* @param {JSZip.compression} compression the compression to use.
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* @return {JSZip.CompressedObject} the compressed result.
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*/
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var generateCompressedObjectFrom = function (file, compression) {
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var result = new JSZip.CompressedObject(), content;
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// the data has not been decompressed, we might reuse things !
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if (file._data instanceof JSZip.CompressedObject) {
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result.uncompressedSize = file._data.uncompressedSize;
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result.crc32 = file._data.crc32;
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if (result.uncompressedSize === 0 || file.options.dir) {
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compression = JSZip.compressions['STORE'];
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result.compressedContent = "";
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result.crc32 = 0;
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} else if (file._data.compressionMethod === compression.magic) {
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result.compressedContent = file._data.getCompressedContent();
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} else {
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content = file._data.getContent();
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// need to decompress / recompress
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result.compressedContent = compression.compress(JSZip.utils.transformTo(compression.compressInputType, content));
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}
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} else {
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// have uncompressed data
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content = getBinaryData(file);
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if (!content || content.length === 0 || file.options.dir) {
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compression = JSZip.compressions['STORE'];
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content = "";
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}
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result.uncompressedSize = content.length;
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result.crc32 = this.crc32(content);
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result.compressedContent = compression.compress(JSZip.utils.transformTo(compression.compressInputType, content));
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}
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result.compressedSize = result.compressedContent.length;
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result.compressionMethod = compression.magic;
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return result;
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};
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/**
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* Generate the various parts used in the construction of the final zip file.
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* @param {string} name the file name.
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* @param {ZipObject} file the file content.
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* @param {JSZip.CompressedObject} compressedObject the compressed object.
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* @param {number} offset the current offset from the start of the zip file.
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* @return {object} the zip parts.
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*/
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var generateZipParts = function(name, file, compressedObject, offset) {
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var data = compressedObject.compressedContent,
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utfEncodedFileName = this.utf8encode(file.name),
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useUTF8 = utfEncodedFileName !== file.name,
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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 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 += compressedObject.compressionMethod;
|
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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(compressedObject.crc32, 4);
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// compressed size
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header += decToHex(compressedObject.compressedSize, 4);
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// uncompressed size
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header += decToHex(compressedObject.uncompressedSize, 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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var fileRecord = JSZip.signature.LOCAL_FILE_HEADER + header + utfEncodedFileName;
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var dirRecord = JSZip.signature.CENTRAL_FILE_HEADER +
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// version made by (00: DOS)
|
|
"\x14\x00" +
|
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// 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" +
|
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// external file attributes
|
|
(file.options.dir===true?"\x10\x00\x00\x00":"\x00\x00\x00\x00")+
|
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// relative offset of local header
|
|
decToHex(offset, 4) +
|
|
// file name
|
|
utfEncodedFileName;
|
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|
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return {
|
|
fileRecord : fileRecord,
|
|
dirRecord : dirRecord,
|
|
compressedObject : compressedObject
|
|
};
|
|
};
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|
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/**
|
|
* 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 (JSZip.utils.isRegExp(name)) {
|
|
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 (JSZip.utils.isRegExp(arg)) {
|
|
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.options.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" :
|
|
// case "string" :
|
|
default :
|
|
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 (textEncoder) {
|
|
var u8 = textEncoder.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 (textDecoder) {
|
|
return textDecoder.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
|
|
}
|
|
};
|
|
|
|
(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 BlobBuilder = window.BlobBuilder || window.WebKitBlobBuilder || window.MozBlobBuilder || window.MSBlobBuilder;
|
|
var builder = new BlobBuilder();
|
|
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;
|
|
|
|
var canUseApply = true;
|
|
try {
|
|
switch(type) {
|
|
case "uint8array":
|
|
String.fromCharCode.apply(null, new Uint8Array(0));
|
|
break;
|
|
case "nodebuffer":
|
|
String.fromCharCode.apply(null, new Buffer(0));
|
|
break;
|
|
}
|
|
} catch(e) {
|
|
canUseApply = false;
|
|
}
|
|
|
|
// no apply : slow and painful algorithm
|
|
// default browser on android 4.*
|
|
if (!canUseApply) {
|
|
var resultStr = "";
|
|
for(var i = 0; i < array.length;i++) {
|
|
resultStr += String.fromCharCode(array[i]);
|
|
}
|
|
return resultStr;
|
|
}
|
|
|
|
while (k < len && chunk > 1) {
|
|
try {
|
|
if (type === "array" || type === "nodebuffer") {
|
|
result.push(String.fromCharCode.apply(null, array.slice(k, Math.min(k + chunk, len))));
|
|
} else {
|
|
result.push(String.fromCharCode.apply(null, array.subarray(k, Math.min(k + chunk, len))));
|
|
}
|
|
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 (Object.prototype.toString.call(input) === "[object 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";
|
|
}
|
|
};
|
|
|
|
/**
|
|
* Cross-window, cross-Node-context regular expression detection
|
|
* @param {Object} object Anything
|
|
* @return {Boolean} true if the object is a regular expression,
|
|
* false otherwise
|
|
*/
|
|
JSZip.utils.isRegExp = function (object) {
|
|
return Object.prototype.toString.call(object) === "[object RegExp]";
|
|
};
|
|
|
|
/**
|
|
* 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:
|