mirror of
https://github.com/gyurix1968/guacamole-client.git
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128 lines
3.7 KiB
JavaScript
128 lines
3.7 KiB
JavaScript
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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var Guacamole = Guacamole || {};
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/**
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* A reader which automatically handles the given input stream, assembling all
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* received blobs into a single blob by appending them to each other in order.
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* Note that this object will overwrite any installed event handlers on the
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* given Guacamole.InputStream.
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*
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* @constructor
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* @param {Guacamole.InputStream} stream The stream that data will be read
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* from.
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* @param {String} mimetype The mimetype of the blob being built.
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*/
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Guacamole.BlobReader = function(stream, mimetype) {
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/**
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* Reference to this Guacamole.InputStream.
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* @private
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*/
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var guac_reader = this;
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/**
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* The length of this Guacamole.InputStream in bytes.
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* @private
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*/
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var length = 0;
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// Get blob builder
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var blob_builder;
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if (window.BlobBuilder) blob_builder = new BlobBuilder();
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else if (window.WebKitBlobBuilder) blob_builder = new WebKitBlobBuilder();
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else if (window.MozBlobBuilder) blob_builder = new MozBlobBuilder();
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else
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blob_builder = new (function() {
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var blobs = [];
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/** @ignore */
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this.append = function(data) {
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blobs.push(new Blob([data], {"type": mimetype}));
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};
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/** @ignore */
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this.getBlob = function() {
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return new Blob(blobs, {"type": mimetype});
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};
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})();
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// Append received blobs
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stream.onblob = function(data) {
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// Convert to ArrayBuffer
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var binary = window.atob(data);
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var arrayBuffer = new ArrayBuffer(binary.length);
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var bufferView = new Uint8Array(arrayBuffer);
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for (var i=0; i<binary.length; i++)
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bufferView[i] = binary.charCodeAt(i);
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blob_builder.append(arrayBuffer);
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length += arrayBuffer.byteLength;
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// Call handler, if present
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if (guac_reader.onprogress)
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guac_reader.onprogress(arrayBuffer.byteLength);
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// Send success response
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stream.sendAck("OK", 0x0000);
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};
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// Simply call onend when end received
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stream.onend = function() {
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if (guac_reader.onend)
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guac_reader.onend();
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};
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/**
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* Returns the current length of this Guacamole.InputStream, in bytes.
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* @return {Number} The current length of this Guacamole.InputStream.
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*/
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this.getLength = function() {
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return length;
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};
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/**
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* Returns the contents of this Guacamole.BlobReader as a Blob.
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* @return {Blob} The contents of this Guacamole.BlobReader.
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*/
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this.getBlob = function() {
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return blob_builder.getBlob();
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};
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/**
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* Fired once for every blob of data received.
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*
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* @event
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* @param {Number} length The number of bytes received.
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*/
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this.onprogress = null;
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/**
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* Fired once this stream is finished and no further data will be written.
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* @event
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*/
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this.onend = null;
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}; |