/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
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;
};