581 lines
19 KiB
JavaScript
581 lines
19 KiB
JavaScript
/*
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Based on https://github.com/gildas-lormeau/zip.js/blob/master/WebContent/zip.js
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Copyright (c) 2013 Gildas Lormeau. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the distribution.
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3. The names of the authors may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JCRAFT,
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INC. OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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define(function(require) {
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var ERR_BAD_FORMAT = "File format is not recognized.";
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var ERR_ENCRYPTED = "File contains encrypted entry.";
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var ERR_ZIP64 = "File is using Zip64 (4gb+ file size).";
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var ERR_READ = "Error while reading zip file.";
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var ERR_WRITE = "Error while writing zip file.";
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var ERR_WRITE_DATA = "Error while writing file data.";
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var ERR_READ_DATA = "Error while reading file data.";
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var ERR_DUPLICATED_NAME = "File already exists.";
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var CHUNK_SIZE = 512 * 1024;
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var Inflater = require("zip.js/inflate");
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var Deflater = require("zip.js/deflate");
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var TEXT_PLAIN = "text/plain";
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var MESSAGE_EVENT = "message";
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function Crc32() {
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var crc = -1, that = this;
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that.append = function(data) {
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var offset, table = that.table;
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for (offset = 0; offset < data.length; offset++)
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crc = (crc >>> 8) ^ table[(crc ^ data[offset]) & 0xFF];
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};
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that.get = function() {
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return ~crc;
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};
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}
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Crc32.prototype.table = (function() {
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var i, j, t, table = [];
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for (i = 0; i < 256; i++) {
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t = i;
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for (j = 0; j < 8; j++)
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if (t & 1)
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t = (t >>> 1) ^ 0xEDB88320;
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else
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t = t >>> 1;
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table[i] = t;
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}
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return table;
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})();
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function getDataHelper(byteLength, bytes) {
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var dataBuffer, dataArray;
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dataBuffer = new ArrayBuffer(byteLength);
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dataArray = new Uint8Array(dataBuffer);
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if (bytes)
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dataArray.set(bytes, 0);
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return {
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buffer : dataBuffer,
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array : dataArray,
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view : new DataView(dataBuffer)
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};
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}
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// Readers
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// Filer fs-based File Reader, given a path and a fs instance
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function FileReader(path, fs) {
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var that = this;
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function init(callback, onerror) {
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fs.stat(path, function(err, stats) {
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if(err) return onerror(err);
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that.size = stats.size;
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callback();
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});
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}
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function getData(callback, onerror) {
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if(that.data) {
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callback();
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return;
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}
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fs.readFile(path, function(err, data) {
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if(err) return onerror(err);
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that.data = data;
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callback();
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});
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}
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function readUint8Array(index, length, callback, onerror) {
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getData(function() {
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callback(that.data.subarray(index, index + length));
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}, onerror);
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}
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that.size = 0;
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that.init = init;
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that.readUint8Array = readUint8Array;
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}
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FileReader.prototype.checkCrc32 = false;
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// Filer fs-based File Writer
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function FileWriter(path, fs, size) {
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var that = this;
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function init(callback) {
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// TODO: Overwrite the file. Should we also have a way to fail if exists?
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fs.unlink(path, function() {
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callback();
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});
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}
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function getData(callback) {
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callback(); // XXX I don't think I need getData to return anything... that.data);
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}
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function writeUint8Array(array, callback, onerror) {
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fs.appendFile(path, array, function(err) {
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if(err) return onerror(err);
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that.data = array;
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callback();
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});
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}
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that.size = size;
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that.init = init;
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that.writeUint8Array = writeUint8Array;
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that.getData = getData;
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}
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// inflate/deflate core functions
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function launchProcess(process, reader, writer, offset, size, onappend, onprogress, onend, onreaderror, onwriteerror) {
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var chunkIndex = 0, index, outputSize = 0;
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function step() {
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var outputData;
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index = chunkIndex * CHUNK_SIZE;
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if (index < size)
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reader.readUint8Array(offset + index, Math.min(CHUNK_SIZE, size - index), function(inputData) {
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var outputData = process.append(inputData, function() {
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if (onprogress)
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onprogress(offset + index, size);
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});
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outputSize += outputData.length;
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onappend(true, inputData);
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writer.writeUint8Array(outputData, function() {
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onappend(false, outputData);
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chunkIndex++;
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setTimeout(step, 1);
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}, onwriteerror);
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if (onprogress)
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onprogress(index, size);
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}, onreaderror);
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else {
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outputData = process.flush();
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if (outputData) {
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outputSize += outputData.length;
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writer.writeUint8Array(outputData, function() {
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onappend(false, outputData);
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onend(outputSize);
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}, onwriteerror);
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} else
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onend(outputSize);
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}
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}
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step();
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}
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function inflate(reader, writer, offset, size, computeCrc32, onend, onprogress, onreaderror, onwriteerror) {
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var crc32 = new Crc32();
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function oninflateappend(sending, array) {
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if (computeCrc32 && !sending)
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crc32.append(array);
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}
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function oninflateend(outputSize) {
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onend(outputSize, crc32.get());
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}
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launchProcess(new Inflater(), reader, writer, offset, size, oninflateappend, onprogress, oninflateend, onreaderror, onwriteerror);
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return;
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}
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function deflate(reader, writer, level, onend, onprogress, onreaderror, onwriteerror) {
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var crc32 = new Crc32();
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function ondeflateappend(sending, array) {
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if (sending)
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crc32.append(array);
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}
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function ondeflateend(outputSize) {
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onend(outputSize, crc32.get());
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}
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launchProcess(new Deflater(), reader, writer, 0, reader.size, ondeflateappend, onprogress, ondeflateend, onreaderror, onwriteerror);
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return;
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}
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function copy(reader, writer, offset, size, computeCrc32, onend, onprogress, onreaderror, onwriteerror) {
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var chunkIndex = 0, crc32 = new Crc32();
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function step() {
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var index = chunkIndex * CHUNK_SIZE;
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if (index < size)
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reader.readUint8Array(offset + index, Math.min(CHUNK_SIZE, size - index), function(array) {
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if (computeCrc32)
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crc32.append(array);
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if (onprogress)
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onprogress(index, size, array);
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writer.writeUint8Array(array, function() {
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chunkIndex++;
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step();
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}, onwriteerror);
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}, onreaderror);
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else
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onend(size, crc32.get());
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}
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step();
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}
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// ZipReader
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function decodeASCII(str) {
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var i, out = "", charCode, extendedASCII = [ '\u00C7', '\u00FC', '\u00E9', '\u00E2', '\u00E4', '\u00E0', '\u00E5', '\u00E7', '\u00EA', '\u00EB',
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'\u00E8', '\u00EF', '\u00EE', '\u00EC', '\u00C4', '\u00C5', '\u00C9', '\u00E6', '\u00C6', '\u00F4', '\u00F6', '\u00F2', '\u00FB', '\u00F9',
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'\u00FF', '\u00D6', '\u00DC', '\u00F8', '\u00A3', '\u00D8', '\u00D7', '\u0192', '\u00E1', '\u00ED', '\u00F3', '\u00FA', '\u00F1', '\u00D1',
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'\u00AA', '\u00BA', '\u00BF', '\u00AE', '\u00AC', '\u00BD', '\u00BC', '\u00A1', '\u00AB', '\u00BB', '_', '_', '_', '\u00A6', '\u00A6',
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'\u00C1', '\u00C2', '\u00C0', '\u00A9', '\u00A6', '\u00A6', '+', '+', '\u00A2', '\u00A5', '+', '+', '-', '-', '+', '-', '+', '\u00E3',
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'\u00C3', '+', '+', '-', '-', '\u00A6', '-', '+', '\u00A4', '\u00F0', '\u00D0', '\u00CA', '\u00CB', '\u00C8', 'i', '\u00CD', '\u00CE',
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'\u00CF', '+', '+', '_', '_', '\u00A6', '\u00CC', '_', '\u00D3', '\u00DF', '\u00D4', '\u00D2', '\u00F5', '\u00D5', '\u00B5', '\u00FE',
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'\u00DE', '\u00DA', '\u00DB', '\u00D9', '\u00FD', '\u00DD', '\u00AF', '\u00B4', '\u00AD', '\u00B1', '_', '\u00BE', '\u00B6', '\u00A7',
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'\u00F7', '\u00B8', '\u00B0', '\u00A8', '\u00B7', '\u00B9', '\u00B3', '\u00B2', '_', ' ' ];
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for (i = 0; i < str.length; i++) {
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charCode = str.charCodeAt(i) & 0xFF;
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if (charCode > 127)
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out += extendedASCII[charCode - 128];
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else
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out += String.fromCharCode(charCode);
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}
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return out;
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}
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function decodeUTF8(string) {
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return decodeURIComponent(escape(string));
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}
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function getString(bytes) {
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var i, str = "";
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for (i = 0; i < bytes.length; i++)
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str += String.fromCharCode(bytes[i]);
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return str;
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}
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function getDate(timeRaw) {
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var date = (timeRaw & 0xffff0000) >> 16, time = timeRaw & 0x0000ffff;
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try {
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return new Date(1980 + ((date & 0xFE00) >> 9), ((date & 0x01E0) >> 5) - 1, date & 0x001F, (time & 0xF800) >> 11, (time & 0x07E0) >> 5,
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(time & 0x001F) * 2, 0);
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} catch (e) {
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}
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}
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function readCommonHeader(entry, data, index, centralDirectory, onerror) {
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entry.version = data.view.getUint16(index, true);
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entry.bitFlag = data.view.getUint16(index + 2, true);
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entry.compressionMethod = data.view.getUint16(index + 4, true);
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entry.lastModDateRaw = data.view.getUint32(index + 6, true);
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entry.lastModDate = getDate(entry.lastModDateRaw);
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if ((entry.bitFlag & 0x01) === 0x01) {
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onerror(ERR_ENCRYPTED);
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return;
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}
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if (centralDirectory || (entry.bitFlag & 0x0008) != 0x0008) {
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entry.crc32 = data.view.getUint32(index + 10, true);
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entry.compressedSize = data.view.getUint32(index + 14, true);
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entry.uncompressedSize = data.view.getUint32(index + 18, true);
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}
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if (entry.compressedSize === 0xFFFFFFFF || entry.uncompressedSize === 0xFFFFFFFF) {
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onerror(ERR_ZIP64);
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return;
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}
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entry.filenameLength = data.view.getUint16(index + 22, true);
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entry.extraFieldLength = data.view.getUint16(index + 24, true);
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}
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function createZipReader(reader, onerror) {
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function Entry() {
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}
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Entry.prototype.getData = function(writer, onend, onprogress, checkCrc32) {
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var that = this;
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function terminate(callback, param) {
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if (callback)
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callback(param);
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}
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function testCrc32(crc32) {
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var dataCrc32 = getDataHelper(4);
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dataCrc32.view.setUint32(0, crc32);
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return that.crc32 == dataCrc32.view.getUint32(0);
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}
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function getWriterData(uncompressedSize, crc32) {
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if (checkCrc32 && !testCrc32(crc32))
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onreaderror();
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else
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writer.getData(function(data) {
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terminate(onend, data);
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});
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}
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function onreaderror() {
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terminate(onerror, ERR_READ_DATA);
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}
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function onwriteerror() {
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terminate(onerror, ERR_WRITE_DATA);
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}
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reader.readUint8Array(that.offset, 30, function(bytes) {
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var data = getDataHelper(bytes.length, bytes), dataOffset;
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if (data.view.getUint32(0) != 0x504b0304) {
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onerror(ERR_BAD_FORMAT);
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return;
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}
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readCommonHeader(that, data, 4, false, onerror);
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dataOffset = that.offset + 30 + that.filenameLength + that.extraFieldLength;
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writer.init(function() {
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if (that.compressionMethod === 0)
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copy(reader, writer, dataOffset, that.compressedSize, checkCrc32, getWriterData, onprogress, onreaderror, onwriteerror);
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else
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inflate(reader, writer, dataOffset, that.compressedSize, checkCrc32, getWriterData, onprogress, onreaderror, onwriteerror);
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}, onwriteerror);
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}, onreaderror);
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};
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function seekEOCDR(offset, entriesCallback) {
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reader.readUint8Array(reader.size - offset, offset, function(bytes) {
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var dataView = getDataHelper(bytes.length, bytes).view;
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if (dataView.getUint32(0) != 0x504b0506) {
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seekEOCDR(offset + 1, entriesCallback);
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} else {
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entriesCallback(dataView);
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}
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}, function() {
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onerror(ERR_READ);
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});
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}
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return {
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getEntries : function(callback) {
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if (reader.size < 22) {
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onerror(ERR_BAD_FORMAT);
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return;
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}
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// look for End of central directory record
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seekEOCDR(22, function(dataView) {
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var datalength, fileslength;
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datalength = dataView.getUint32(16, true);
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fileslength = dataView.getUint16(8, true);
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reader.readUint8Array(datalength, reader.size - datalength, function(bytes) {
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var i, index = 0, entries = [], entry, filename, comment, data = getDataHelper(bytes.length, bytes);
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for (i = 0; i < fileslength; i++) {
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entry = new Entry();
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if (data.view.getUint32(index) != 0x504b0102) {
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onerror(ERR_BAD_FORMAT);
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return;
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}
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readCommonHeader(entry, data, index + 6, true, onerror);
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entry.commentLength = data.view.getUint16(index + 32, true);
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entry.directory = ((data.view.getUint8(index + 38) & 0x10) == 0x10);
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entry.offset = data.view.getUint32(index + 42, true);
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filename = getString(data.array.subarray(index + 46, index + 46 + entry.filenameLength));
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entry.filename = ((entry.bitFlag & 0x0800) === 0x0800) ? decodeUTF8(filename) : decodeASCII(filename);
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if (!entry.directory && entry.filename.charAt(entry.filename.length - 1) == "/")
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entry.directory = true;
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comment = getString(data.array.subarray(index + 46 + entry.filenameLength + entry.extraFieldLength, index + 46
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+ entry.filenameLength + entry.extraFieldLength + entry.commentLength));
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entry.comment = ((entry.bitFlag & 0x0800) === 0x0800) ? decodeUTF8(comment) : decodeASCII(comment);
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entries.push(entry);
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index += 46 + entry.filenameLength + entry.extraFieldLength + entry.commentLength;
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}
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callback(entries);
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}, function() {
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onerror(ERR_READ);
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});
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});
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},
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close : function(callback) {
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if (callback)
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callback();
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}
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};
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}
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// ZipWriter
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function encodeUTF8(string) {
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return unescape(encodeURIComponent(string));
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}
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function getBytes(str) {
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var i, array = [];
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for (i = 0; i < str.length; i++)
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array.push(str.charCodeAt(i));
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return array;
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}
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function createZipWriter(writer, onerror, dontDeflate) {
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var files = {}, filenames = [], datalength = 0;
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function terminate(callback, message) {
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if (callback)
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callback(message);
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}
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function onwriteerror() {
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terminate(onerror, ERR_WRITE);
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}
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function onreaderror() {
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terminate(onerror, ERR_READ_DATA);
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}
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return {
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add : function(name, reader, onend, onprogress, options) {
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var header, filename, date;
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function writeHeader(callback) {
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var data;
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date = options.lastModDate || new Date();
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header = getDataHelper(26);
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files[name] = {
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headerArray : header.array,
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directory : options.directory,
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filename : filename,
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offset : datalength,
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comment : getBytes(encodeUTF8(options.comment || ""))
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};
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header.view.setUint32(0, 0x14000808);
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if (options.version)
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header.view.setUint8(0, options.version);
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if (!dontDeflate && options.level !== 0 && !options.directory)
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header.view.setUint16(4, 0x0800);
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header.view.setUint16(6, (((date.getHours() << 6) | date.getMinutes()) << 5) | date.getSeconds() / 2, true);
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header.view.setUint16(8, ((((date.getFullYear() - 1980) << 4) | (date.getMonth() + 1)) << 5) | date.getDate(), true);
|
|
header.view.setUint16(22, filename.length, true);
|
|
data = getDataHelper(30 + filename.length);
|
|
data.view.setUint32(0, 0x504b0304);
|
|
data.array.set(header.array, 4);
|
|
data.array.set(filename, 30);
|
|
datalength += data.array.length;
|
|
writer.writeUint8Array(data.array, callback, onwriteerror);
|
|
}
|
|
|
|
function writeFooter(compressedLength, crc32) {
|
|
var footer = getDataHelper(16);
|
|
datalength += compressedLength || 0;
|
|
footer.view.setUint32(0, 0x504b0708);
|
|
if (typeof crc32 != "undefined") {
|
|
header.view.setUint32(10, crc32, true);
|
|
footer.view.setUint32(4, crc32, true);
|
|
}
|
|
if (reader) {
|
|
footer.view.setUint32(8, compressedLength, true);
|
|
header.view.setUint32(14, compressedLength, true);
|
|
footer.view.setUint32(12, reader.size, true);
|
|
header.view.setUint32(18, reader.size, true);
|
|
}
|
|
writer.writeUint8Array(footer.array, function() {
|
|
datalength += 16;
|
|
terminate(onend);
|
|
}, onwriteerror);
|
|
}
|
|
|
|
function writeFile() {
|
|
options = options || {};
|
|
name = name.trim();
|
|
if (options.directory && name.charAt(name.length - 1) != "/")
|
|
name += "/";
|
|
if (files.hasOwnProperty(name)) {
|
|
onerror(ERR_DUPLICATED_NAME);
|
|
return;
|
|
}
|
|
filename = getBytes(encodeUTF8(name));
|
|
filenames.push(name);
|
|
writeHeader(function() {
|
|
if (reader)
|
|
if (dontDeflate || options.level === 0)
|
|
copy(reader, writer, 0, reader.size, true, writeFooter, onprogress, onreaderror, onwriteerror);
|
|
else
|
|
writeFooter();
|
|
}, onwriteerror);
|
|
}
|
|
|
|
if (reader)
|
|
reader.init(writeFile, onreaderror);
|
|
else
|
|
writeFile();
|
|
},
|
|
close : function(callback) {
|
|
var data, length = 0, index = 0, indexFilename, file;
|
|
for (indexFilename = 0; indexFilename < filenames.length; indexFilename++) {
|
|
file = files[filenames[indexFilename]];
|
|
length += 46 + file.filename.length + file.comment.length;
|
|
}
|
|
data = getDataHelper(length + 22);
|
|
for (indexFilename = 0; indexFilename < filenames.length; indexFilename++) {
|
|
file = files[filenames[indexFilename]];
|
|
data.view.setUint32(index, 0x504b0102);
|
|
data.view.setUint16(index + 4, 0x1400);
|
|
data.array.set(file.headerArray, index + 6);
|
|
data.view.setUint16(index + 32, file.comment.length, true);
|
|
if (file.directory)
|
|
data.view.setUint8(index + 38, 0x10);
|
|
data.view.setUint32(index + 42, file.offset, true);
|
|
data.array.set(file.filename, index + 46);
|
|
data.array.set(file.comment, index + 46 + file.filename.length);
|
|
index += 46 + file.filename.length + file.comment.length;
|
|
}
|
|
data.view.setUint32(index, 0x504b0506);
|
|
data.view.setUint16(index + 8, filenames.length, true);
|
|
data.view.setUint16(index + 10, filenames.length, true);
|
|
data.view.setUint32(index + 12, length, true);
|
|
data.view.setUint32(index + 16, datalength, true);
|
|
writer.writeUint8Array(data.array, function() {
|
|
terminate(function() {
|
|
writer.getData(callback);
|
|
});
|
|
}, onwriteerror);
|
|
}
|
|
};
|
|
}
|
|
|
|
return {
|
|
FileReader : FileReader,
|
|
FileWriter : FileWriter,
|
|
createReader : function(reader, callback, onerror) {
|
|
reader.init(function() {
|
|
callback(createZipReader(reader, onerror));
|
|
}, onerror);
|
|
},
|
|
createWriter : function(writer, callback, onerror, dontDeflate) {
|
|
writer.init(function() {
|
|
callback(createZipWriter(writer, onerror, dontDeflate));
|
|
}, onerror);
|
|
}
|
|
};
|
|
|
|
});
|