mirror of
https://github.com/sol1/rustguac.git
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Dave Kempe
142 lines
4.3 KiB
JavaScript
142 lines
4.3 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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* An input stream abstraction used by the Guacamole client to facilitate
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* transfer of files or other binary data.
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*
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* @constructor
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* @param {!Guacamole.Client} client
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* The client owning this stream.
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*
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* @param {!number} index
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* The index of this stream.
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*/
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Guacamole.InputStream = function(client, index) {
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/**
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* Reference to this stream.
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*
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* @private
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* @type {!Guacamole.InputStream}
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*/
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var guac_stream = this;
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/**
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* The index of this stream.
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*
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* @type {!number}
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*/
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this.index = index;
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/**
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* Called when a blob of data is received.
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*
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* @event
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* @param {!string} data
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* The received base64 data.
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*/
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this.onblob = null;
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/**
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* Called when this stream is closed.
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*
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* @event
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*/
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this.onend = null;
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/**
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* Acknowledges the receipt of a blob.
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*
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* @param {!string} message
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* A human-readable message describing the error or status.
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*
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* @param {!number} code
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* The error code, if any, or 0 for success.
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*/
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this.sendAck = function(message, code) {
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client.sendAck(guac_stream.index, message, code);
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};
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/**
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* Creates a new ReadableStream that receives the data sent to this stream
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* by the Guacamole server. This function may be invoked at most once per
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* stream, and invoking this function will overwrite any installed event
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* handlers on this stream.
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*
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* A ReadableStream is a JavaScript object defined by the "Streams"
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* standard. It is supported by most browsers, but not necessarily all
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* browsers. The caller should verify this support is present before
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* invoking this function. The behavior of this function when the browser
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* does not support ReadableStream is not defined.
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*
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* @see {@link https://streams.spec.whatwg.org/#rs-class}
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*
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* @returns {!ReadableStream}
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* A new ReadableStream that receives the bytes sent along this stream
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* by the Guacamole server.
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*/
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this.toReadableStream = function toReadableStream() {
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return new ReadableStream({
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type: 'bytes',
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start: function startStream(controller) {
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var reader = new Guacamole.ArrayBufferReader(guac_stream);
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// Provide any received blocks of data to the ReadableStream
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// controller, such that they will be read by whatever is
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// consuming the ReadableStream
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reader.ondata = function dataReceived(data) {
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if (controller.byobRequest) {
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var view = controller.byobRequest.view;
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var length = Math.min(view.byteLength, data.byteLength);
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var byobBlock = new Uint8Array(data, 0, length);
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view.buffer.set(byobBlock);
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controller.byobRequest.respond(length);
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if (length < data.byteLength) {
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controller.enqueue(data.slice(length));
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}
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}
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else {
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controller.enqueue(new Uint8Array(data));
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}
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};
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// Notify the ReadableStream when the end of the stream is
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// reached
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reader.onend = function dataComplete() {
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controller.close();
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};
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}
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});
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};
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};
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