fix

rpmbuild/BUILD/smarttms/apache-tomcat-7.0.63/webapps/noVNC-master/include/websock.js

@@ -0,0 +1,388 @@
+/*
+ * Websock: high-performance binary WebSockets
+ * Copyright (C) 2012 Joel Martin
+ * Licensed under MPL 2.0 (see LICENSE.txt)
+ *
+ * Websock is similar to the standard WebSocket object but Websock
+ * enables communication with raw TCP sockets (i.e. the binary stream)
+ * via websockify. This is accomplished by base64 encoding the data
+ * stream between Websock and websockify.
+ *
+ * Websock has built-in receive queue buffering; the message event
+ * does not contain actual data but is simply a notification that
+ * there is new data available. Several rQ* methods are available to
+ * read binary data off of the receive queue.
+ */
+
+/*jslint browser: true, bitwise: true */
+/*global Util, Base64 */
+
+
+// Load Flash WebSocket emulator if needed
+
+// To force WebSocket emulator even when native WebSocket available
+//window.WEB_SOCKET_FORCE_FLASH = true;
+// To enable WebSocket emulator debug:
+//window.WEB_SOCKET_DEBUG=1;
+
+if (window.WebSocket && !window.WEB_SOCKET_FORCE_FLASH) {
+    Websock_native = true;
+} else if (window.MozWebSocket && !window.WEB_SOCKET_FORCE_FLASH) {
+    Websock_native = true;
+    window.WebSocket = window.MozWebSocket;
+} else {
+    /* no builtin WebSocket so load web_socket.js */
+
+    Websock_native = false;
+    (function () {
+        window.WEB_SOCKET_SWF_LOCATION = Util.get_include_uri() +
+                    "web-socket-js/WebSocketMain.swf";
+        if (Util.Engine.trident) {
+            Util.Debug("Forcing uncached load of WebSocketMain.swf");
+            window.WEB_SOCKET_SWF_LOCATION += "?" + Math.random();
+        }
+        Util.load_scripts(["web-socket-js/swfobject.js",
+                           "web-socket-js/web_socket.js"]);
+    })();
+}
+
+
+function Websock() {
+    "use strict";
+
+    this._websocket = null;  // WebSocket object
+    this._rQ = [];           // Receive queue
+    this._rQi = 0;           // Receive queue index
+    this._rQmax = 10000;     // Max receive queue size before compacting
+    this._sQ = [];           // Send queue
+
+    this._mode = 'base64';    // Current WebSocket mode: 'binary', 'base64'
+    this.maxBufferedAmount = 200;
+
+    this._eventHandlers = {
+        'message': function () {},
+        'open': function () {},
+        'close': function () {},
+        'error': function () {}
+    };
+}
+
+(function () {
+    "use strict";
+    Websock.prototype = {
+        // Getters and Setters
+        get_sQ: function () {
+            return this._sQ;
+        },
+
+        get_rQ: function () {
+            return this._rQ;
+        },
+
+        get_rQi: function () {
+            return this._rQi;
+        },
+
+        set_rQi: function (val) {
+            this._rQi = val;
+        },
+
+        // Receive Queue
+        rQlen: function () {
+            return this._rQ.length - this._rQi;
+        },
+
+        rQpeek8: function () {
+            return this._rQ[this._rQi];
+        },
+
+        rQshift8: function () {
+            return this._rQ[this._rQi++];
+        },
+
+        rQskip8: function () {
+            this._rQi++;
+        },
+
+        rQskipBytes: function (num) {
+            this._rQi += num;
+        },
+
+        rQunshift8: function (num) {
+            if (this._rQi === 0) {
+                this._rQ.unshift(num);
+            } else {
+                this._rQi--;
+                this._rQ[this._rQi] = num;
+            }
+        },
+
+        rQshift16: function () {
+            return (this._rQ[this._rQi++] << 8) +
+                   this._rQ[this._rQi++];
+        },
+
+        rQshift32: function () {
+            return (this._rQ[this._rQi++] << 24) +
+                   (this._rQ[this._rQi++] << 16) +
+                   (this._rQ[this._rQi++] << 8) +
+                   this._rQ[this._rQi++];
+        },
+
+        rQshiftStr: function (len) {
+            if (typeof(len) === 'undefined') { len = this.rQlen(); }
+            var arr = this._rQ.slice(this._rQi, this._rQi + len);
+            this._rQi += len;
+            return String.fromCharCode.apply(null, arr);
+        },
+
+        rQshiftBytes: function (len) {
+            if (typeof(len) === 'undefined') { len = this.rQlen(); }
+            this._rQi += len;
+            return this._rQ.slice(this._rQi - len, this._rQi);
+        },
+
+        rQslice: function (start, end) {
+            if (end) {
+                return this._rQ.slice(this._rQi + start, this._rQi + end);
+            } else {
+                return this._rQ.slice(this._rQi + start);
+            }
+        },
+
+        // Check to see if we must wait for 'num' bytes (default to FBU.bytes)
+        // to be available in the receive queue. Return true if we need to
+        // wait (and possibly print a debug message), otherwise false.
+        rQwait: function (msg, num, goback) {
+            var rQlen = this._rQ.length - this._rQi; // Skip rQlen() function call
+            if (rQlen < num) {
+                if (goback) {
+                    if (this._rQi < goback) {
+                        throw new Error("rQwait cannot backup " + goback + " bytes");
+                    }
+                    this._rQi -= goback;
+                }
+                return true; // true means need more data
+            }
+            return false;
+        },
+
+        // Send Queue
+
+        flush: function () {
+            if (this._websocket.bufferedAmount !== 0) {
+                Util.Debug("bufferedAmount: " + this._websocket.bufferedAmount);
+            }
+
+            if (this._websocket.bufferedAmount < this.maxBufferedAmount) {
+                if (this._sQ.length > 0) {
+                    this._websocket.send(this._encode_message());
+                    this._sQ = [];
+                }
+
+                return true;
+            } else {
+                Util.Info("Delaying send, bufferedAmount: " +
+                        this._websocket.bufferedAmount);
+                return false;
+            }
+        },
+
+        send: function (arr) {
+           this._sQ = this._sQ.concat(arr);
+           return this.flush();
+        },
+
+        send_string: function (str) {
+            this.send(str.split('').map(function (chr) {
+                return chr.charCodeAt(0);
+            }));
+        },
+
+        // Event Handlers
+        off: function (evt) {
+            this._eventHandlers[evt] = function () {};
+        },
+
+        on: function (evt, handler) {
+            this._eventHandlers[evt] = handler;
+        },
+
+        init: function (protocols, ws_schema) {
+            this._rQ = [];
+            this._rQi = 0;
+            this._sQ = [];
+            this._websocket = null;
+
+            // Check for full typed array support
+            var bt = false;
+            if (('Uint8Array' in window) &&
+                    ('set' in Uint8Array.prototype)) {
+                bt = true;
+            }
+
+            // Check for full binary type support in WebSockets
+            // Inspired by:
+            // https://github.com/Modernizr/Modernizr/issues/370
+            // https://github.com/Modernizr/Modernizr/blob/master/feature-detects/websockets/binary.js
+            var wsbt = false;
+            try {
+                if (bt && ('binaryType' in WebSocket.prototype ||
+                           !!(new WebSocket(ws_schema + '://.').binaryType))) {
+                    Util.Info("Detected binaryType support in WebSockets");
+                    wsbt = true;
+                }
+            } catch (exc) {
+                // Just ignore failed test localhost connection
+            }
+
+            // Default protocols if not specified
+            if (typeof(protocols) === "undefined") {
+                if (wsbt) {
+                    protocols = ['binary', 'base64'];
+                } else {
+                    protocols = 'base64';
+                }
+            }
+
+            if (!wsbt) {
+                if (protocols === 'binary') {
+                    throw new Error('WebSocket binary sub-protocol requested but not supported');
+                }
+
+                if (typeof(protocols) === 'object') {
+                    var new_protocols = [];
+
+                    for (var i = 0; i < protocols.length; i++) {
+                        if (protocols[i] === 'binary') {
+                            Util.Error('Skipping unsupported WebSocket binary sub-protocol');
+                        } else {
+                            new_protocols.push(protocols[i]);
+                        }
+                    }
+
+                    if (new_protocols.length > 0) {
+                        protocols = new_protocols;
+                    } else {
+                        throw new Error("Only WebSocket binary sub-protocol was requested and is not supported.");
+                    }
+                }
+            }
+
+            return protocols;
+        },
+
+        open: function (uri, protocols) {
+            var ws_schema = uri.match(/^([a-z]+):\/\//)[1];
+            protocols = this.init(protocols, ws_schema);
+
+            this._websocket = new WebSocket(uri, protocols);
+
+            if (protocols.indexOf('binary') >= 0) {
+                this._websocket.binaryType = 'arraybuffer';
+            }
+
+            this._websocket.onmessage = this._recv_message.bind(this);
+            this._websocket.onopen = (function () {
+                Util.Debug('>> WebSock.onopen');
+                if (this._websocket.protocol) {
+                    this._mode = this._websocket.protocol;
+                    Util.Info("Server choose sub-protocol: " + this._websocket.protocol);
+                } else {
+                    this._mode = 'base64';
+                    Util.Error('Server select no sub-protocol!: ' + this._websocket.protocol);
+                }
+                this._eventHandlers.open();
+                Util.Debug("<< WebSock.onopen");
+            }).bind(this);
+            this._websocket.onclose = (function (e) {
+                Util.Debug(">> WebSock.onclose");
+                this._eventHandlers.close(e);
+                Util.Debug("<< WebSock.onclose");
+            }).bind(this);
+            this._websocket.onerror = (function (e) {
+                Util.Debug(">> WebSock.onerror: " + e);
+                this._eventHandlers.error(e);
+                Util.Debug("<< WebSock.onerror: " + e);
+            }).bind(this);
+        },
+
+        close: function () {
+            if (this._websocket) {
+                if ((this._websocket.readyState === WebSocket.OPEN) ||
+                        (this._websocket.readyState === WebSocket.CONNECTING)) {
+                    Util.Info("Closing WebSocket connection");
+                    this._websocket.close();
+                }
+
+                this._websocket.onmessage = function (e) { return; };
+            }
+        },
+
+        // private methods
+        _encode_message: function () {
+            if (this._mode === 'binary') {
+                // Put in a binary arraybuffer
+                return (new Uint8Array(this._sQ)).buffer;
+            } else {
+                // base64 encode
+                return Base64.encode(this._sQ);
+            }
+        },
+
+        _decode_message: function (data) {
+            if (this._mode === 'binary') {
+                // push arraybuffer values onto the end
+                var u8 = new Uint8Array(data);
+                for (var i = 0; i < u8.length; i++) {
+                    this._rQ.push(u8[i]);
+                }
+            } else {
+                // base64 decode and concat to end
+                this._rQ = this._rQ.concat(Base64.decode(data, 0));
+            }
+        },
+
+        _recv_message: function (e) {
+            try {
+                this._decode_message(e.data);
+                if (this.rQlen() > 0) {
+                    this._eventHandlers.message();
+                    // Compact the receive queue
+                    if (this._rQ.length > this._rQmax) {
+                        this._rQ = this._rQ.slice(this._rQi);
+                        this._rQi = 0;
+                    }
+                } else {
+                    Util.Debug("Ignoring empty message");
+                }
+            } catch (exc) {
+                var exception_str = "";
+                if (exc.name) {
+                    exception_str += "\n    name: " + exc.name + "\n";
+                    exception_str += "    message: " + exc.message + "\n";
+                }
+
+                if (typeof exc.description !== 'undefined') {
+                    exception_str += "    description: " + exc.description + "\n";
+                }
+
+                if (typeof exc.stack !== 'undefined') {
+                    exception_str += exc.stack;
+                }
+
+                if (exception_str.length > 0) {
+                    Util.Error("recv_message, caught exception: " + exception_str);
+                } else {
+                    Util.Error("recv_message, caught exception: " + exc);
+                }
+
+                if (typeof exc.name !== 'undefined') {
+                    this._eventHandlers.error(exc.name + ": " + exc.message);
+                } else {
+                    this._eventHandlers.error(exc);
+                }
+            }
+        }
+    };
+})();