/*
* 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
*/
var guac_reader = this;
/**
* The length of this Guacamole.InputStream in bytes.
* @private
*/
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;
};