/*
* 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, returning
* received blobs as a single data URI built over the course of the stream.
* 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.
*/
Guacamole.DataURIReader = function(stream, mimetype) {
/**
* Reference to this Guacamole.DataURIReader.
* @private
*/
var guac_reader = this;
/**
* Current data URI.
*
* @private
* @type {String}
*/
var uri = 'data:' + mimetype + ';base64,';
// Receive blobs as array buffers
stream.onblob = function dataURIReaderBlob(data) {
// Currently assuming data will ALWAYS be safe to simply append. This
// will not be true if the received base64 data encodes a number of
// bytes that isn't a multiple of three (as base64 expands in a ratio
// of exactly 3:4).
uri += data;
};
// Simply call onend when end received
stream.onend = function dataURIReaderEnd() {
if (guac_reader.onend)
guac_reader.onend();
};
/**
* Returns the data URI of all data received through the underlying stream
* thus far.
*
* @returns {String}
* The data URI of all data received through the underlying stream thus
* far.
*/
this.getURI = function getURI() {
return uri;
};
/**
* Fired once this stream is finished and no further data will be written.
*
* @event
*/
this.onend = null;
};