diff options
Diffstat (limited to 'webclients/novnc/include/chrome-app/tcp-client.js')
-rw-r--r-- | webclients/novnc/include/chrome-app/tcp-client.js | 321 |
1 files changed, 0 insertions, 321 deletions
diff --git a/webclients/novnc/include/chrome-app/tcp-client.js b/webclients/novnc/include/chrome-app/tcp-client.js deleted file mode 100644 index b8c125f..0000000 --- a/webclients/novnc/include/chrome-app/tcp-client.js +++ /dev/null @@ -1,321 +0,0 @@ -/* -Copyright 2012 Google Inc. - -Licensed 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. - -Author: Boris Smus (smus@chromium.org) -*/ - -(function(exports) { - - // Define some local variables here. - var socket = chrome.socket || chrome.experimental.socket; - var dns = chrome.experimental.dns; - - /** - * Creates an instance of the client - * - * @param {String} host The remote host to connect to - * @param {Number} port The port to connect to at the remote host - */ - function TcpClient(host, port, pollInterval) { - this.host = host; - this.port = port; - this.pollInterval = pollInterval || 15; - - // Callback functions. - this.callbacks = { - connect: null, // Called when socket is connected. - disconnect: null, // Called when socket is disconnected. - recvBuffer: null, // Called (as ArrayBuffer) when client receives data from server. - recvString: null, // Called (as string) when client receives data from server. - sent: null // Called when client sends data to server. - }; - - // Socket. - this.socketId = null; - this.isConnected = false; - - log('initialized tcp client'); - } - - /** - * Connects to the TCP socket, and creates an open socket. - * - * @see http://developer.chrome.com/trunk/apps/socket.html#method-create - * @param {Function} callback The function to call on connection - */ - TcpClient.prototype.connect = function(callback) { - // First resolve the hostname to an IP. - dns.resolve(this.host, function(result) { - this.addr = result.address; - socket.create('tcp', {}, this._onCreate.bind(this)); - - // Register connect callback. - this.callbacks.connect = callback; - }.bind(this)); - }; - - /** - * Sends an arraybuffer/view down the wire to the remote side - * - * @see http://developer.chrome.com/trunk/apps/socket.html#method-write - * @param {String} msg The arraybuffer/view to send - * @param {Function} callback The function to call when the message has sent - */ - TcpClient.prototype.sendBuffer = function(buf, callback) { - if (buf.buffer) { - buf = buf.buffer; - } - - /* - // Debug - var bytes = [], u8 = new Uint8Array(buf); - for (var i = 0; i < u8.length; i++) { - bytes.push(u8[i]); - } - log("sending bytes: " + (bytes.join(','))); - */ - - socket.write(this.socketId, buf, this._onWriteComplete.bind(this)); - - // Register sent callback. - this.callbacks.sent = callback; - }; - - /** - * Sends a string down the wire to the remote side - * - * @see http://developer.chrome.com/trunk/apps/socket.html#method-write - * @param {String} msg The string to send - * @param {Function} callback The function to call when the message has sent - */ - TcpClient.prototype.sendString = function(msg, callback) { - /* - // Debug - log("sending string: " + msg); - */ - - this._stringToArrayBuffer(msg, function(arrayBuffer) { - socket.write(this.socketId, arrayBuffer, this._onWriteComplete.bind(this)); - }.bind(this)); - - // Register sent callback. - this.callbacks.sent = callback; - }; - - /** - * Sets the callback for when a message is received - * - * @param {Function} callback The function to call when a message has arrived - * @param {String} type The callback argument type: "arraybuffer" or "string" - */ - TcpClient.prototype.addResponseListener = function(callback, type) { - if (typeof type === "undefined") { - type = "arraybuffer"; - } - // Register received callback. - if (type === "string") { - this.callbacks.recvString = callback; - } else { - this.callbacks.recvBuffer = callback; - } - }; - - /** - * Sets the callback for when the socket disconnects - * - * @param {Function} callback The function to call when the socket disconnects - * @param {String} type The callback argument type: "arraybuffer" or "string" - */ - TcpClient.prototype.addDisconnectListener = function(callback) { - // Register disconnect callback. - this.callbacks.disconnect = callback; - }; - - /** - * Disconnects from the remote side - * - * @see http://developer.chrome.com/trunk/apps/socket.html#method-disconnect - */ - TcpClient.prototype.disconnect = function() { - if (this.isConnected) { - this.isConnected = false; - socket.disconnect(this.socketId); - if (this.callbacks.disconnect) { - this.callbacks.disconnect(); - } - log('socket disconnected'); - } - }; - - /** - * The callback function used for when we attempt to have Chrome - * create a socket. If the socket is successfully created - * we go ahead and connect to the remote side. - * - * @private - * @see http://developer.chrome.com/trunk/apps/socket.html#method-connect - * @param {Object} createInfo The socket details - */ - TcpClient.prototype._onCreate = function(createInfo) { - this.socketId = createInfo.socketId; - if (this.socketId > 0) { - socket.connect(this.socketId, this.addr, this.port, this._onConnectComplete.bind(this)); - } else { - error('Unable to create socket'); - } - }; - - /** - * The callback function used for when we attempt to have Chrome - * connect to the remote side. If a successful connection is - * made then polling starts to check for data to read - * - * @private - * @param {Number} resultCode Indicates whether the connection was successful - */ - TcpClient.prototype._onConnectComplete = function(resultCode) { - // Start polling for reads. - this.isConnected = true; - setTimeout(this._periodicallyRead.bind(this), this.pollInterval); - - if (this.callbacks.connect) { - log('connect complete'); - this.callbacks.connect(); - } - log('onConnectComplete'); - }; - - /** - * Checks for new data to read from the socket - * - * @see http://developer.chrome.com/trunk/apps/socket.html#method-read - */ - TcpClient.prototype._periodicallyRead = function() { - var that = this; - socket.getInfo(this.socketId, function (info) { - if (info.connected) { - setTimeout(that._periodicallyRead.bind(that), that.pollInterval); - socket.read(that.socketId, null, that._onDataRead.bind(that)); - } else if (that.isConnected) { - log('socket disconnect detected'); - that.disconnect(); - } - }); - }; - - /** - * Callback function for when data has been read from the socket. - * Converts the array buffer that is read in to a string - * and sends it on for further processing by passing it to - * the previously assigned callback function. - * - * @private - * @see TcpClient.prototype.addResponseListener - * @param {Object} readInfo The incoming message - */ - TcpClient.prototype._onDataRead = function(readInfo) { - // Call received callback if there's data in the response. - if (readInfo.resultCode > 0) { - log('onDataRead'); - - /* - // Debug - var bytes = [], u8 = new Uint8Array(readInfo.data); - for (var i = 0; i < u8.length; i++) { - bytes.push(u8[i]); - } - log("received bytes: " + (bytes.join(','))); - */ - - if (this.callbacks.recvBuffer) { - // Return raw ArrayBuffer directly. - this.callbacks.recvBuffer(readInfo.data); - } - if (this.callbacks.recvString) { - // Convert ArrayBuffer to string. - this._arrayBufferToString(readInfo.data, function(str) { - this.callbacks.recvString(str); - }.bind(this)); - } - - // Trigger another read right away - setTimeout(this._periodicallyRead.bind(this), 0); - } - }; - - /** - * Callback for when data has been successfully - * written to the socket. - * - * @private - * @param {Object} writeInfo The outgoing message - */ - TcpClient.prototype._onWriteComplete = function(writeInfo) { - log('onWriteComplete'); - // Call sent callback. - if (this.callbacks.sent) { - this.callbacks.sent(writeInfo); - } - }; - - /** - * Converts an array buffer to a string - * - * @private - * @param {ArrayBuffer} buf The buffer to convert - * @param {Function} callback The function to call when conversion is complete - */ - TcpClient.prototype._arrayBufferToString = function(buf, callback) { - var bb = new Blob([new Uint8Array(buf)]); - var f = new FileReader(); - f.onload = function(e) { - callback(e.target.result); - }; - f.readAsText(bb); - }; - - /** - * Converts a string to an array buffer - * - * @private - * @param {String} str The string to convert - * @param {Function} callback The function to call when conversion is complete - */ - TcpClient.prototype._stringToArrayBuffer = function(str, callback) { - var bb = new Blob([str]); - var f = new FileReader(); - f.onload = function(e) { - callback(e.target.result); - }; - f.readAsArrayBuffer(bb); - }; - - /** - * Wrapper function for logging - */ - function log(msg) { - console.log(msg); - } - - /** - * Wrapper function for error logging - */ - function error(msg) { - console.error(msg); - } - - exports.TcpClient = TcpClient; - -})(window); |