Configring node js.

node_modules/jszip/lib/compressedObject.js

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+'use strict';
+
+var external = require("./external");
+var DataWorker = require('./stream/DataWorker');
+var DataLengthProbe = require('./stream/DataLengthProbe');
+var Crc32Probe = require('./stream/Crc32Probe');
+var DataLengthProbe = require('./stream/DataLengthProbe');
+
+/**
+ * Represent a compressed object, with everything needed to decompress it.
+ * @constructor
+ * @param {number} compressedSize the size of the data compressed.
+ * @param {number} uncompressedSize the size of the data after decompression.
+ * @param {number} crc32 the crc32 of the decompressed file.
+ * @param {object} compression the type of compression, see lib/compressions.js.
+ * @param {String|ArrayBuffer|Uint8Array|Buffer} data the compressed data.
+ */
+function CompressedObject(compressedSize, uncompressedSize, crc32, compression, data) {
+    this.compressedSize = compressedSize;
+    this.uncompressedSize = uncompressedSize;
+    this.crc32 = crc32;
+    this.compression = compression;
+    this.compressedContent = data;
+}
+
+CompressedObject.prototype = {
+    /**
+     * Create a worker to get the uncompressed content.
+     * @return {GenericWorker} the worker.
+     */
+    getContentWorker : function () {
+        var worker = new DataWorker(external.Promise.resolve(this.compressedContent))
+        .pipe(this.compression.uncompressWorker())
+        .pipe(new DataLengthProbe("data_length"));
+
+        var that = this;
+        worker.on("end", function () {
+            if(this.streamInfo['data_length'] !== that.uncompressedSize) {
+                throw new Error("Bug : uncompressed data size mismatch");
+            }
+        });
+        return worker;
+    },
+    /**
+     * Create a worker to get the compressed content.
+     * @return {GenericWorker} the worker.
+     */
+    getCompressedWorker : function () {
+        return new DataWorker(external.Promise.resolve(this.compressedContent))
+        .withStreamInfo("compressedSize", this.compressedSize)
+        .withStreamInfo("uncompressedSize", this.uncompressedSize)
+        .withStreamInfo("crc32", this.crc32)
+        .withStreamInfo("compression", this.compression)
+        ;
+    }
+};
+
+/**
+ * Chain the given worker with other workers to compress the content with the
+ * given compresion.
+ * @param {GenericWorker} uncompressedWorker the worker to pipe.
+ * @param {Object} compression the compression object.
+ * @param {Object} compressionOptions the options to use when compressing.
+ * @return {GenericWorker} the new worker compressing the content.
+ */
+CompressedObject.createWorkerFrom = function (uncompressedWorker, compression, compressionOptions) {
+    return uncompressedWorker
+    .pipe(new Crc32Probe())
+    .pipe(new DataLengthProbe("uncompressedSize"))
+    .pipe(compression.compressWorker(compressionOptions))
+    .pipe(new DataLengthProbe("compressedSize"))
+    .withStreamInfo("compression", compression);
+};
+
+module.exports = CompressedObject;