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| <h1 class="page-title">Source: main/webapp/modules/BlobReader.js</h1> |
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| <article> |
| <pre class="prettyprint source linenums"><code>/* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| var Guacamole = Guacamole || {}; |
| |
| /** |
| * A reader which automatically handles the given input stream, assembling all |
| * received blobs into a single blob by appending them to each other in order. |
| * Note that this object will overwrite any installed event handlers on the |
| * given Guacamole.InputStream. |
| * |
| * @constructor |
| * @param {!Guacamole.InputStream} stream |
| * The stream that data will be read from. |
| * |
| * @param {!string} mimetype |
| * The mimetype of the blob being built. |
| */ |
| Guacamole.BlobReader = function(stream, mimetype) { |
| |
| /** |
| * Reference to this Guacamole.InputStream. |
| * |
| * @private |
| * @type {!Guacamole.BlobReader} |
| */ |
| var guac_reader = this; |
| |
| /** |
| * The length of this Guacamole.InputStream in bytes. |
| * |
| * @private |
| * @type {!number} |
| */ |
| var length = 0; |
| |
| // Get blob builder |
| var blob_builder; |
| if (window.BlobBuilder) blob_builder = new BlobBuilder(); |
| else if (window.WebKitBlobBuilder) blob_builder = new WebKitBlobBuilder(); |
| else if (window.MozBlobBuilder) blob_builder = new MozBlobBuilder(); |
| else |
| blob_builder = new (function() { |
| |
| var blobs = []; |
| |
| /** @ignore */ |
| this.append = function(data) { |
| blobs.push(new Blob([data], {"type": mimetype})); |
| }; |
| |
| /** @ignore */ |
| this.getBlob = function() { |
| return new Blob(blobs, {"type": mimetype}); |
| }; |
| |
| })(); |
| |
| // Append received blobs |
| stream.onblob = function(data) { |
| |
| // Convert to ArrayBuffer |
| var binary = window.atob(data); |
| var arrayBuffer = new ArrayBuffer(binary.length); |
| var bufferView = new Uint8Array(arrayBuffer); |
| |
| for (var i=0; i<binary.length; i++) |
| bufferView[i] = binary.charCodeAt(i); |
| |
| blob_builder.append(arrayBuffer); |
| length += arrayBuffer.byteLength; |
| |
| // Call handler, if present |
| if (guac_reader.onprogress) |
| guac_reader.onprogress(arrayBuffer.byteLength); |
| |
| // Send success response |
| stream.sendAck("OK", 0x0000); |
| |
| }; |
| |
| // Simply call onend when end received |
| stream.onend = function() { |
| if (guac_reader.onend) |
| guac_reader.onend(); |
| }; |
| |
| /** |
| * Returns the current length of this Guacamole.InputStream, in bytes. |
| * |
| * @return {!number} |
| * The current length of this Guacamole.InputStream. |
| */ |
| this.getLength = function() { |
| return length; |
| }; |
| |
| /** |
| * Returns the contents of this Guacamole.BlobReader as a Blob. |
| * |
| * @return {!Blob} |
| * The contents of this Guacamole.BlobReader. |
| */ |
| this.getBlob = function() { |
| return blob_builder.getBlob(); |
| }; |
| |
| /** |
| * Fired once for every blob of data received. |
| * |
| * @event |
| * @param {!number} length |
| * The number of bytes received. |
| */ |
| this.onprogress = null; |
| |
| /** |
| * Fired once this stream is finished and no further data will be written. |
| * @event |
| */ |
| this.onend = null; |
| |
| };</code></pre> |
| </article> |
| </section> |
| |
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