554 lines
16 KiB
JavaScript
554 lines
16 KiB
JavaScript
/*
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Copyright (c) 2012 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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(function() {
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var CHUNK_SIZE = 512 * 1024;
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var FileWriter = zip.FileWriter, //
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TextWriter = zip.TextWriter, //
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BlobWriter = zip.BlobWriter, //
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Data64URIWriter = zip.Data64URIWriter, //
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Reader = zip.Reader, //
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TextReader = zip.TextReader, //
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BlobReader = zip.BlobReader, //
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Data64URIReader = zip.Data64URIReader, //
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HttpRangeReader = zip.HttpRangeReader, //
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HttpReader = zip.HttpReader, //
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createReader = zip.createReader, //
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createWriter = zip.createWriter;
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function ZipBlobReader(entry) {
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var that = this, blobReader;
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function init(callback, onerror) {
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this.size = entry.uncompressedSize;
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callback();
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}
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function getData(callback) {
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if (that.data)
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callback();
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else
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entry.getData(new BlobWriter(), function(data) {
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that.data = data;
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blobReader = new BlobReader(data);
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callback();
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}, null, that.checkCrc32);
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}
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function readUint8Array(index, length, callback, onerror) {
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getData(function() {
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blobReader.readUint8Array(index, length, callback, onerror);
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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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ZipBlobReader.prototype = new Reader();
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ZipBlobReader.prototype.constructor = ZipBlobReader;
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ZipBlobReader.prototype.checkCrc32 = false;
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function getTotalSize(entry) {
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var size = 0;
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function process(entry) {
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size += entry.uncompressedSize || 0;
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entry.children.forEach(process);
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}
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process(entry);
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return size;
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}
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function initReaders(entry, onend, onerror) {
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var index = 0;
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function next() {
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var child = entry.children[index];
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index++;
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if (index < entry.children.length)
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process(entry.children[index]);
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else
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onend();
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}
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function process(child) {
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if (child.directory)
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initReaders(child, next, onerror);
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else {
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child.reader = new child.Reader(child.data, onerror);
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child.reader.init(function() {
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child.uncompressedSize = child.reader.size;
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next();
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});
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}
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}
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if (entry.children.length)
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process(entry.children[index]);
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else
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onend();
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}
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function detach(entry) {
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var children = entry.parent.children;
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children.forEach(function(child, index) {
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if (child.id == entry.id)
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children.splice(index, 1);
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});
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}
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function exportZip(zipWriter, entry, onend, onprogress, totalSize) {
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var currentIndex = 0;
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function process(zipWriter, entry, onend, onprogress, totalSize) {
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var childIndex = 0;
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function exportChild() {
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var child = entry.children[childIndex];
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if (child)
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zipWriter.add(child.getFullname(), child.reader, function() {
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currentIndex += child.uncompressedSize || 0;
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process(zipWriter, child, function() {
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childIndex++;
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exportChild();
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}, onprogress, totalSize);
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}, function(index) {
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if (onprogress)
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onprogress(currentIndex + index, totalSize);
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}, {
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directory : child.directory,
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version : child.zipVersion
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});
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else
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onend();
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}
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exportChild();
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}
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process(zipWriter, entry, onend, onprogress, totalSize);
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}
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function addFileEntry(zipEntry, fileEntry, onend, onerror) {
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function getChildren(fileEntry, callback) {
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if (fileEntry.isDirectory)
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fileEntry.createReader().readEntries(callback);
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if (fileEntry.isFile)
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callback([]);
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}
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function process(zipEntry, fileEntry, onend) {
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getChildren(fileEntry, function(children) {
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var childIndex = 0;
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function addChild(child) {
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function nextChild(childFileEntry) {
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process(childFileEntry, child, function() {
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childIndex++;
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processChild();
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});
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}
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if (child.isDirectory)
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nextChild(zipEntry.addDirectory(child.name));
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if (child.isFile)
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child.file(function(file) {
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var childZipEntry = zipEntry.addBlob(child.name, file);
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childZipEntry.uncompressedSize = file.size;
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nextChild(childZipEntry);
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}, onerror);
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}
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function processChild() {
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var child = children[childIndex];
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if (child)
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addChild(child);
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else
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onend();
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}
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processChild();
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});
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}
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if (fileEntry.isDirectory)
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process(zipEntry, fileEntry, onend);
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else
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fileEntry.file(function(file) {
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zipEntry.addBlob(fileEntry.name, file);
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onend();
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}, onerror);
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}
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function getFileEntry(fileEntry, entry, onend, onprogress, totalSize, checkCrc32) {
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var currentIndex = 0, rootEntry;
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function process(fileEntry, entry, onend, onprogress, totalSize) {
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var childIndex = 0;
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function addChild(child) {
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function nextChild(childFileEntry) {
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currentIndex += child.uncompressedSize || 0;
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process(childFileEntry, child, function() {
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childIndex++;
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processChild();
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}, onprogress, totalSize);
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}
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if (child.directory)
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fileEntry.getDirectory(child.name, {
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create : true
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}, nextChild, onerror);
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else
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fileEntry.getFile(child.name, {
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create : true
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}, function(file) {
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child.getData(new FileWriter(file, zip.getMimeType(child.name)), nextChild, function(index, max) {
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if (onprogress)
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onprogress(currentIndex + index, totalSize);
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}, checkCrc32);
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}, onerror);
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}
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function processChild() {
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var child = entry.children[childIndex];
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if (child)
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addChild(child);
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else
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onend();
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}
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processChild();
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}
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if (entry.directory)
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process(fileEntry, entry, onend, onprogress, totalSize);
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else
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entry.getData(new FileWriter(fileEntry, zip.getMimeType(entry.name)), onend, onprogress, checkCrc32);
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}
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function resetFS(fs) {
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fs.entries = [];
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fs.root = new ZipDirectoryEntry(fs);
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}
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function bufferedCopy(reader, writer, onend, onprogress, onerror) {
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var chunkIndex = 0;
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function stepCopy() {
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var index = chunkIndex * CHUNK_SIZE;
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if (onprogress)
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onprogress(index, reader.size);
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if (index < reader.size)
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reader.readUint8Array(index, Math.min(CHUNK_SIZE, reader.size - index), function(array) {
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writer.writeUint8Array(new Uint8Array(array), function() {
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chunkIndex++;
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stepCopy();
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});
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}, onerror);
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else
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writer.getData(onend);
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}
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stepCopy();
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}
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function getEntryData(writer, onend, onprogress, onerror) {
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var that = this;
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if (!writer || (writer.constructor == that.Writer && that.data))
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onend(that.data);
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else {
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if (!that.reader)
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that.reader = new that.Reader(that.data, onerror);
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that.reader.init(function() {
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writer.init(function() {
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bufferedCopy(that.reader, writer, onend, onprogress, onerror);
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}, onerror);
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});
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}
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}
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function addChild(parent, name, params, directory) {
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if (parent.directory)
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return directory ? new ZipDirectoryEntry(parent.fs, name, params, parent) : new ZipFileEntry(parent.fs, name, params, parent);
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else
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throw "Parent entry is not a directory.";
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}
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function ZipEntry() {
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}
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ZipEntry.prototype = {
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init : function(fs, name, params, parent) {
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var that = this;
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if (fs.root && parent && parent.getChildByName(name))
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throw "Entry filename already exists.";
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if (!params)
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params = {};
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that.fs = fs;
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that.name = name;
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that.id = fs.entries.length;
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that.parent = parent;
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that.children = [];
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that.zipVersion = params.zipVersion || 0x14;
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that.uncompressedSize = 0;
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fs.entries.push(that);
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if (parent)
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that.parent.children.push(that);
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},
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getFileEntry : function(fileEntry, onend, onprogress, onerror, checkCrc32) {
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var that = this;
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initReaders(that, function() {
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getFileEntry(fileEntry, that, onend, onprogress, getTotalSize(that), checkCrc32);
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}, onerror);
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},
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moveTo : function(target) {
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var that = this;
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if (target.directory) {
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if (!target.isDescendantOf(that)) {
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if (that != target) {
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if (target.getChildByName(that.name))
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throw "Entry filename already exists.";
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detach(that);
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that.parent = target;
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target.children.push(that);
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}
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} else
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throw "Entry is a ancestor of target entry.";
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} else
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throw "Target entry is not a directory.";
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},
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getFullname : function() {
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var that = this, fullname = that.name, entry = that.parent;
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while (entry) {
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fullname = (entry.name ? entry.name + "/" : "") + fullname;
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entry = entry.parent;
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}
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return fullname;
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},
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isDescendantOf : function(ancestor) {
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var entry = this.parent;
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while (entry && entry.id != ancestor.id)
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entry = entry.parent;
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return !!entry;
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}
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};
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ZipEntry.prototype.constructor = ZipEntry;
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var ZipFileEntryProto;
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function ZipFileEntry(fs, name, params, parent) {
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var that = this;
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ZipEntry.prototype.init.call(that, fs, name, params, parent);
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that.Reader = params.Reader;
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that.Writer = params.Writer;
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that.data = params.data;
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that.getData = params.getData || getEntryData;
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}
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ZipFileEntry.prototype = ZipFileEntryProto = new ZipEntry();
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ZipFileEntryProto.constructor = ZipFileEntry;
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ZipFileEntryProto.getText = function(onend, onprogress, checkCrc32) {
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this.getData(new TextWriter(), onend, onprogress, checkCrc32);
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};
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ZipFileEntryProto.getBlob = function(mimeType, onend, onprogress, checkCrc32) {
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this.getData(new BlobWriter(mimeType), onend, onprogress, checkCrc32);
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};
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ZipFileEntryProto.getData64URI = function(mimeType, onend, onprogress, checkCrc32) {
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this.getData(new Data64URIWriter(mimeType), onend, onprogress, checkCrc32);
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};
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var ZipDirectoryEntryProto;
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function ZipDirectoryEntry(fs, name, params, parent) {
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var that = this;
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ZipEntry.prototype.init.call(that, fs, name, params, parent);
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that.directory = true;
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}
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ZipDirectoryEntry.prototype = ZipDirectoryEntryProto = new ZipEntry();
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ZipDirectoryEntryProto.constructor = ZipDirectoryEntry;
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ZipDirectoryEntryProto.addDirectory = function(name) {
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return addChild(this, name, null, true);
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};
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ZipDirectoryEntryProto.addText = function(name, text) {
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return addChild(this, name, {
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data : text,
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Reader : TextReader,
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Writer : TextWriter
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});
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};
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ZipDirectoryEntryProto.addBlob = function(name, blob) {
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return addChild(this, name, {
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data : blob,
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Reader : BlobReader,
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Writer : BlobWriter
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});
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};
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ZipDirectoryEntryProto.addData64URI = function(name, dataURI) {
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return addChild(this, name, {
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data : dataURI,
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Reader : Data64URIReader,
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Writer : Data64URIWriter
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});
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};
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ZipDirectoryEntryProto.addHttpContent = function(name, URL, useRangeHeader) {
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return addChild(this, name, {
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data : URL,
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Reader : useRangeHeader ? HttpRangeReader : HttpReader
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});
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};
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ZipDirectoryEntryProto.addFileEntry = function(fileEntry, onend, onerror) {
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addFileEntry(this, fileEntry, onend, onerror);
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};
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ZipDirectoryEntryProto.addData = function(name, params) {
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return addChild(this, name, params);
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};
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ZipDirectoryEntryProto.importBlob = function(blob, onend, onerror) {
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this.importZip(new BlobReader(blob), onend, onerror);
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};
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ZipDirectoryEntryProto.importText = function(text, onend, onerror) {
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this.importZip(new TextReader(text), onend, onerror);
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};
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ZipDirectoryEntryProto.importData64URI = function(dataURI, onend, onerror) {
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this.importZip(new Data64URIReader(dataURI), onend, onerror);
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};
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ZipDirectoryEntryProto.importHttpContent = function(URL, useRangeHeader, onend, onerror) {
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this.importZip(useRangeHeader ? new HttpRangeReader(URL) : new HttpReader(URL), onend, onerror);
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};
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ZipDirectoryEntryProto.exportBlob = function(onend, onprogress, onerror) {
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this.exportZip(new BlobWriter("application/zip"), onend, onprogress, onerror);
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};
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ZipDirectoryEntryProto.exportText = function(onend, onprogress, onerror) {
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this.exportZip(new TextWriter(), onend, onprogress, onerror);
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};
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ZipDirectoryEntryProto.exportFileEntry = function(fileEntry, onend, onprogress, onerror) {
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this.exportZip(new FileWriter(fileEntry, "application/zip"), onend, onprogress, onerror);
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};
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ZipDirectoryEntryProto.exportData64URI = function(onend, onprogress, onerror) {
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this.exportZip(new Data64URIWriter("application/zip"), onend, onprogress, onerror);
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};
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ZipDirectoryEntryProto.importZip = function(reader, onend, onerror) {
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var that = this;
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createReader(reader, function(zipReader) {
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zipReader.getEntries(function(entries) {
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entries.forEach(function(entry) {
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var parent = that, path = entry.filename.split("/"), name = path.pop();
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path.forEach(function(pathPart) {
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parent = parent.getChildByName(pathPart) || new ZipDirectoryEntry(that.fs, pathPart, null, parent);
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});
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if (!entry.directory)
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addChild(parent, name, {
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data : entry,
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Reader : ZipBlobReader
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});
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});
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onend();
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});
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}, onerror);
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};
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ZipDirectoryEntryProto.exportZip = function(writer, onend, onprogress, onerror) {
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var that = this;
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initReaders(that, function() {
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createWriter(writer, function(zipWriter) {
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exportZip(zipWriter, that, function() {
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zipWriter.close(onend);
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}, onprogress, getTotalSize(that));
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}, onerror);
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}, onerror);
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};
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ZipDirectoryEntryProto.getChildByName = function(name) {
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var childIndex, child, that = this;
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for (childIndex = 0; childIndex < that.children.length; childIndex++) {
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child = that.children[childIndex];
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if (child.name == name)
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return child;
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}
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};
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function FS() {
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resetFS(this);
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}
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FS.prototype = {
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remove : function(entry) {
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detach(entry);
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this.entries[entry.id] = null;
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},
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find : function(fullname) {
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var index, path = fullname.split("/"), node = this.root;
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for (index = 0; node && index < path.length; index++)
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node = node.getChildByName(path[index]);
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return node;
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},
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getById : function(id) {
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return this.entries[id];
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},
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importBlob : function(blob, onend, onerror) {
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resetFS(this);
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this.root.importBlob(blob, onend, onerror);
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},
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importText : function(text, onend, onerror) {
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resetFS(this);
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this.root.importText(text, onend, onerror);
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},
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importData64URI : function(dataURI, onend, onerror) {
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resetFS(this);
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this.root.importData64URI(dataURI, onend, onerror);
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},
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importHttpContent : function(URL, useRangeHeader, onend, onerror) {
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resetFS(this);
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this.root.importHttpContent(URL, useRangeHeader, onend, onerror);
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},
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exportBlob : function(onend, onprogress, onerror) {
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this.root.exportBlob(onend, onprogress, onerror);
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},
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exportText : function(onend, onprogress, onerror) {
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this.root.exportText(onend, onprogress, onerror);
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},
|
|
exportFileEntry : function(fileEntry, onend, onprogress, onerror) {
|
|
this.root.exportFileEntry(fileEntry, onend, onprogress, onerror);
|
|
},
|
|
exportData64URI : function(onend, onprogress, onerror) {
|
|
this.root.exportData64URI(onend, onprogress, onerror);
|
|
}
|
|
};
|
|
|
|
zip.fs = {
|
|
FS : FS
|
|
};
|
|
|
|
zip.getMimeType = function() {
|
|
return "application/octet-stream";
|
|
};
|
|
|
|
})();
|