Update websock.js from noVNC
Sync with noVNC as of commit ae510306b5094b55aa08a2a0d15a151704f70993. The main change is to make it a more proper object that you can instantiate multiple times.
This commit is contained in:
Pierre Ossman
parent
10e13d7a7e
commit
3f8f301d7f
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@ -13,288 +13,355 @@
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* read binary data off of the receive queue.
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*/
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/*jslint browser: true, bitwise: false, plusplus: false */
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/*global Util */
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/* [module]
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* import Util from "./util";
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*/
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/*jslint browser: true, bitwise: true */
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/*global Util*/
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function Websock() {
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"use strict";
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/* [module] export default */ function Websock() {
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"use strict";
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var api = {}, // Public API
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websocket = null, // WebSocket object
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rQ = [], // Receive queue
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rQi = 0, // Receive queue index
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rQmax = 10000, // Max receive queue size before compacting
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sQ = [], // Send queue
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this._websocket = null; // WebSocket object
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eventHandlers = {
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'message' : function() {},
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'open' : function() {},
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'close' : function() {},
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'error' : function() {}
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},
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this._rQi = 0; // Receive queue index
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this._rQlen = 0; // Next write position in the receive queue
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this._rQbufferSize = 1024 * 1024 * 4; // Receive queue buffer size (4 MiB)
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this._rQmax = this._rQbufferSize / 8;
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// called in init: this._rQ = new Uint8Array(this._rQbufferSize);
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this._rQ = null; // Receive queue
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test_mode = false;
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this._sQbufferSize = 1024 * 10; // 10 KiB
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// called in init: this._sQ = new Uint8Array(this._sQbufferSize);
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this._sQlen = 0;
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this._sQ = null; // Send queue
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this.maxBufferedAmount = 200;
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//
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// Queue public functions
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//
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this._eventHandlers = {
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'message': function () {},
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'open': function () {},
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'close': function () {},
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'error': function () {}
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};
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};
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function get_sQ() {
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return sQ;
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}
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(function () {
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"use strict";
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// this has performance issues in some versions Chromium, and
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// doesn't gain a tremendous amount of performance increase in Firefox
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// at the moment. It may be valuable to turn it on in the future.
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var ENABLE_COPYWITHIN = false;
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function get_rQ() {
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return rQ;
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}
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function get_rQi() {
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return rQi;
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}
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function set_rQi(val) {
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rQi = val;
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}
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var MAX_RQ_GROW_SIZE = 40 * 1024 * 1024; // 40 MiB
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function rQlen() {
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return rQ.length - rQi;
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}
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var typedArrayToString = (function () {
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// This is only for PhantomJS, which doesn't like apply-ing
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// with Typed Arrays
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try {
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var arr = new Uint8Array([1, 2, 3]);
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String.fromCharCode.apply(null, arr);
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return function (a) { return String.fromCharCode.apply(null, a); };
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} catch (ex) {
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return function (a) {
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return String.fromCharCode.apply(
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null, Array.prototype.slice.call(a));
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};
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}
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})();
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function rQpeek8() {
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return (rQ[rQi] );
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}
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function rQshift8() {
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return (rQ[rQi++] );
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}
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function rQunshift8(num) {
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if (rQi === 0) {
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rQ.unshift(num);
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} else {
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rQi -= 1;
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rQ[rQi] = num;
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}
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Websock.prototype = {
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// Getters and Setters
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get_sQ: function () {
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return this._sQ;
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},
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}
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function rQshift16() {
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return (rQ[rQi++] << 8) +
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(rQ[rQi++] );
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}
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function rQshift32() {
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return (rQ[rQi++] << 24) +
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(rQ[rQi++] << 16) +
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(rQ[rQi++] << 8) +
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(rQ[rQi++] );
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}
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function rQshiftStr(len) {
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if (typeof(len) === 'undefined') { len = rQlen(); }
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var arr = rQ.slice(rQi, rQi + len);
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rQi += len;
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return String.fromCharCode.apply(null, arr);
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}
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function rQshiftBytes(len) {
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if (typeof(len) === 'undefined') { len = rQlen(); }
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rQi += len;
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return rQ.slice(rQi-len, rQi);
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}
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get_rQ: function () {
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return this._rQ;
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},
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function rQslice(start, end) {
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if (end) {
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return rQ.slice(rQi + start, rQi + end);
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} else {
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return rQ.slice(rQi + start);
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}
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}
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get_rQi: function () {
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return this._rQi;
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},
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// Check to see if we must wait for 'num' bytes (default to FBU.bytes)
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// to be available in the receive queue. Return true if we need to
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// wait (and possibly print a debug message), otherwise false.
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function rQwait(msg, num, goback) {
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var rQlen = rQ.length - rQi; // Skip rQlen() function call
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if (rQlen < num) {
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if (goback) {
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if (rQi < goback) {
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throw("rQwait cannot backup " + goback + " bytes");
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set_rQi: function (val) {
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this._rQi = val;
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},
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// Receive Queue
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rQlen: function () {
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return this._rQlen - this._rQi;
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},
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rQpeek8: function () {
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return this._rQ[this._rQi];
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},
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rQshift8: function () {
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return this._rQ[this._rQi++];
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},
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rQskip8: function () {
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this._rQi++;
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},
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rQskipBytes: function (num) {
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this._rQi += num;
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},
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// TODO(directxman12): test performance with these vs a DataView
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rQshift16: function () {
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return (this._rQ[this._rQi++] << 8) +
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this._rQ[this._rQi++];
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},
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rQshift32: function () {
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return (this._rQ[this._rQi++] << 24) +
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(this._rQ[this._rQi++] << 16) +
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(this._rQ[this._rQi++] << 8) +
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this._rQ[this._rQi++];
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},
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rQshiftStr: function (len) {
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if (typeof(len) === 'undefined') { len = this.rQlen(); }
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var arr = new Uint8Array(this._rQ.buffer, this._rQi, len);
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this._rQi += len;
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return typedArrayToString(arr);
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},
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rQshiftBytes: function (len) {
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if (typeof(len) === 'undefined') { len = this.rQlen(); }
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this._rQi += len;
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return new Uint8Array(this._rQ.buffer, this._rQi - len, len);
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},
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rQshiftTo: function (target, len) {
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if (len === undefined) { len = this.rQlen(); }
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// TODO: make this just use set with views when using a ArrayBuffer to store the rQ
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target.set(new Uint8Array(this._rQ.buffer, this._rQi, len));
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this._rQi += len;
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},
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rQwhole: function () {
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return new Uint8Array(this._rQ.buffer, 0, this._rQlen);
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},
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rQslice: function (start, end) {
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if (end) {
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return new Uint8Array(this._rQ.buffer, this._rQi + start, end - start);
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} else {
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return new Uint8Array(this._rQ.buffer, this._rQi + start, this._rQlen - this._rQi - start);
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}
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rQi -= goback;
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}
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//Util.Debug(" waiting for " + (num-rQlen) +
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// " " + msg + " byte(s)");
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return true; // true means need more data
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}
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return false;
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}
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},
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//
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// Public Send functions
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//
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function flush() {
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if (websocket.bufferedAmount !== 0) {
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Util.Debug("bufferedAmount: " + websocket.bufferedAmount);
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}
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if (websocket.bufferedAmount < api.maxBufferedAmount) {
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//Util.Debug("arr: " + arr);
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//Util.Debug("sQ: " + sQ);
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if (sQ.length > 0) {
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websocket.send((new Uint8Array(sQ)).buffer);
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sQ = [];
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}
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return true;
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} else {
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Util.Info("Delaying send, bufferedAmount: " +
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websocket.bufferedAmount);
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return false;
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}
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}
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// overridable for testing
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function send(arr) {
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//Util.Debug(">> send_array: " + arr);
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sQ = sQ.concat(arr);
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return flush();
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}
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function send_string(str) {
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//Util.Debug(">> send_string: " + str);
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api.send(str.split('').map(
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function (chr) { return chr.charCodeAt(0); } ) );
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}
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//
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// Other public functions
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function recv_message(e) {
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//Util.Debug(">> recv_message: " + e.data.length);
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try {
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var u8 = new Uint8Array(e.data);
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for (var i = 0; i < u8.length; i++) {
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rQ.push(u8[i]);
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}
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if (rQlen() > 0) {
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eventHandlers.message();
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// Compact the receive queue
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if (rQ.length > rQmax) {
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//Util.Debug("Compacting receive queue");
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rQ = rQ.slice(rQi);
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rQi = 0;
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// Check to see if we must wait for 'num' bytes (default to FBU.bytes)
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// to be available in the receive queue. Return true if we need to
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// wait (and possibly print a debug message), otherwise false.
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rQwait: function (msg, num, goback) {
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var rQlen = this._rQlen - this._rQi; // Skip rQlen() function call
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if (rQlen < num) {
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if (goback) {
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if (this._rQi < goback) {
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throw new Error("rQwait cannot backup " + goback + " bytes");
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}
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this._rQi -= goback;
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}
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return true; // true means need more data
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}
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return false;
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},
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// Send Queue
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flush: function () {
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if (this._websocket.bufferedAmount !== 0) {
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Util.Debug("bufferedAmount: " + this._websocket.bufferedAmount);
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}
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if (this._websocket.bufferedAmount < this.maxBufferedAmount) {
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if (this._sQlen > 0 && this._websocket.readyState === WebSocket.OPEN) {
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this._websocket.send(this._encode_message());
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this._sQlen = 0;
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}
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return true;
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} else {
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Util.Info("Delaying send, bufferedAmount: " +
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this._websocket.bufferedAmount);
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return false;
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}
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},
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send: function (arr) {
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this._sQ.set(arr, this._sQlen);
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this._sQlen += arr.length;
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return this.flush();
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},
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send_string: function (str) {
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this.send(str.split('').map(function (chr) {
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return chr.charCodeAt(0);
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}));
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},
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// Event Handlers
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off: function (evt) {
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this._eventHandlers[evt] = function () {};
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},
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on: function (evt, handler) {
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this._eventHandlers[evt] = handler;
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},
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_allocate_buffers: function () {
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this._rQ = new Uint8Array(this._rQbufferSize);
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this._sQ = new Uint8Array(this._sQbufferSize);
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},
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init: function () {
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this._allocate_buffers();
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this._rQi = 0;
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this._websocket = null;
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},
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open: function (uri, protocols) {
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var ws_schema = uri.match(/^([a-z]+):\/\//)[1];
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this.init();
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this._websocket = new WebSocket(uri, protocols);
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this._websocket.binaryType = 'arraybuffer';
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this._websocket.onmessage = this._recv_message.bind(this);
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this._websocket.onopen = (function () {
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Util.Debug('>> WebSock.onopen');
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if (this._websocket.protocol) {
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Util.Info("Server choose sub-protocol: " + this._websocket.protocol);
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}
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this._eventHandlers.open();
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Util.Debug("<< WebSock.onopen");
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}).bind(this);
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this._websocket.onclose = (function (e) {
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Util.Debug(">> WebSock.onclose");
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this._eventHandlers.close(e);
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Util.Debug("<< WebSock.onclose");
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}).bind(this);
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this._websocket.onerror = (function (e) {
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Util.Debug(">> WebSock.onerror: " + e);
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this._eventHandlers.error(e);
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Util.Debug("<< WebSock.onerror: " + e);
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}).bind(this);
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},
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close: function () {
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if (this._websocket) {
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if ((this._websocket.readyState === WebSocket.OPEN) ||
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(this._websocket.readyState === WebSocket.CONNECTING)) {
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Util.Info("Closing WebSocket connection");
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this._websocket.close();
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}
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this._websocket.onmessage = function (e) { return; };
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}
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},
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// private methods
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_encode_message: function () {
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// Put in a binary arraybuffer
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// according to the spec, you can send ArrayBufferViews with the send method
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return new Uint8Array(this._sQ.buffer, 0, this._sQlen);
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},
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_expand_compact_rQ: function (min_fit) {
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var resizeNeeded = min_fit || this._rQlen - this._rQi > this._rQbufferSize / 2;
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if (resizeNeeded) {
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if (!min_fit) {
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// just double the size if we need to do compaction
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this._rQbufferSize *= 2;
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} else {
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// otherwise, make sure we satisy rQlen - rQi + min_fit < rQbufferSize / 8
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this._rQbufferSize = (this._rQlen - this._rQi + min_fit) * 8;
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}
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}
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// we don't want to grow unboundedly
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if (this._rQbufferSize > MAX_RQ_GROW_SIZE) {
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this._rQbufferSize = MAX_RQ_GROW_SIZE;
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if (this._rQbufferSize - this._rQlen - this._rQi < min_fit) {
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throw new Exception("Receive Queue buffer exceeded " + MAX_RQ_GROW_SIZE + " bytes, and the new message could not fit");
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}
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}
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if (resizeNeeded) {
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var old_rQbuffer = this._rQ.buffer;
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this._rQmax = this._rQbufferSize / 8;
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this._rQ = new Uint8Array(this._rQbufferSize);
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this._rQ.set(new Uint8Array(old_rQbuffer, this._rQi));
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} else {
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if (ENABLE_COPYWITHIN) {
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this._rQ.copyWithin(0, this._rQi);
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} else {
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this._rQ.set(new Uint8Array(this._rQ.buffer, this._rQi));
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}
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}
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this._rQlen = this._rQlen - this._rQi;
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this._rQi = 0;
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},
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_decode_message: function (data) {
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// push arraybuffer values onto the end
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var u8 = new Uint8Array(data);
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if (u8.length > this._rQbufferSize - this._rQlen) {
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this._expand_compact_rQ(u8.length);
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}
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this._rQ.set(u8, this._rQlen);
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this._rQlen += u8.length;
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},
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_recv_message: function (e) {
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try {
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this._decode_message(e.data);
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if (this.rQlen() > 0) {
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this._eventHandlers.message();
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// Compact the receive queue
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if (this._rQlen == this._rQi) {
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this._rQlen = 0;
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this._rQi = 0;
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} else if (this._rQlen > this._rQmax) {
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this._expand_compact_rQ();
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}
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} else {
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Util.Debug("Ignoring empty message");
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}
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} catch (exc) {
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var exception_str = "";
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if (exc.name) {
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exception_str += "\n name: " + exc.name + "\n";
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exception_str += " message: " + exc.message + "\n";
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}
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if (typeof exc.description !== 'undefined') {
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exception_str += " description: " + exc.description + "\n";
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}
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if (typeof exc.stack !== 'undefined') {
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exception_str += exc.stack;
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}
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if (exception_str.length > 0) {
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Util.Error("recv_message, caught exception: " + exception_str);
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||||
} 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);
|
||||
}
|
||||
}
|
||||
} else {
|
||||
Util.Debug("Ignoring empty message");
|
||||
}
|
||||
} catch (exc) {
|
||||
if (typeof exc.stack !== 'undefined') {
|
||||
Util.Warn("recv_message, caught exception: " + exc.stack);
|
||||
} else if (typeof exc.description !== 'undefined') {
|
||||
Util.Warn("recv_message, caught exception: " + exc.description);
|
||||
} else {
|
||||
Util.Warn("recv_message, caught exception:" + exc);
|
||||
}
|
||||
if (typeof exc.name !== 'undefined') {
|
||||
eventHandlers.error(exc.name + ": " + exc.message);
|
||||
} else {
|
||||
eventHandlers.error(exc);
|
||||
}
|
||||
}
|
||||
//Util.Debug("<< recv_message");
|
||||
}
|
||||
|
||||
|
||||
// Set event handlers
|
||||
function on(evt, handler) {
|
||||
eventHandlers[evt] = handler;
|
||||
}
|
||||
|
||||
function init() {
|
||||
rQ = [];
|
||||
rQi = 0;
|
||||
sQ = [];
|
||||
websocket = null;
|
||||
}
|
||||
|
||||
function open(uri, protocols) {
|
||||
var ws_schema = uri.match(/^([a-z]+):\/\//)[1];
|
||||
init();
|
||||
|
||||
if (test_mode) {
|
||||
websocket = {};
|
||||
} else {
|
||||
websocket = new WebSocket(uri, protocols);
|
||||
websocket.binaryType = 'arraybuffer';
|
||||
}
|
||||
|
||||
websocket.onmessage = recv_message;
|
||||
websocket.onopen = function() {
|
||||
Util.Debug(">> WebSock.onopen");
|
||||
eventHandlers.open();
|
||||
Util.Debug("<< WebSock.onopen");
|
||||
};
|
||||
websocket.onclose = function(e) {
|
||||
Util.Debug(">> WebSock.onclose");
|
||||
eventHandlers.close(e);
|
||||
Util.Debug("<< WebSock.onclose");
|
||||
};
|
||||
websocket.onerror = function(e) {
|
||||
Util.Debug(">> WebSock.onerror: " + e);
|
||||
eventHandlers.error(e);
|
||||
Util.Debug("<< WebSock.onerror");
|
||||
};
|
||||
}
|
||||
|
||||
function close() {
|
||||
if (websocket) {
|
||||
if ((websocket.readyState === WebSocket.OPEN) ||
|
||||
(websocket.readyState === WebSocket.CONNECTING)) {
|
||||
Util.Info("Closing WebSocket connection");
|
||||
websocket.close();
|
||||
}
|
||||
websocket.onmessage = function (e) { return; };
|
||||
}
|
||||
}
|
||||
|
||||
// Override internal functions for testing
|
||||
// Takes a send function, returns reference to recv function
|
||||
function testMode(override_send) {
|
||||
test_mode = true;
|
||||
api.send = override_send;
|
||||
api.close = function () {};
|
||||
return recv_message;
|
||||
}
|
||||
|
||||
function constructor() {
|
||||
// Configuration settings
|
||||
api.maxBufferedAmount = 200;
|
||||
|
||||
// Direct access to send and receive queues
|
||||
api.get_sQ = get_sQ;
|
||||
api.get_rQ = get_rQ;
|
||||
api.get_rQi = get_rQi;
|
||||
api.set_rQi = set_rQi;
|
||||
|
||||
// Routines to read from the receive queue
|
||||
api.rQlen = rQlen;
|
||||
api.rQpeek8 = rQpeek8;
|
||||
api.rQshift8 = rQshift8;
|
||||
api.rQunshift8 = rQunshift8;
|
||||
api.rQshift16 = rQshift16;
|
||||
api.rQshift32 = rQshift32;
|
||||
api.rQshiftStr = rQshiftStr;
|
||||
api.rQshiftBytes = rQshiftBytes;
|
||||
api.rQslice = rQslice;
|
||||
api.rQwait = rQwait;
|
||||
|
||||
api.flush = flush;
|
||||
api.send = send;
|
||||
api.send_string = send_string;
|
||||
|
||||
api.on = on;
|
||||
api.init = init;
|
||||
api.open = open;
|
||||
api.close = close;
|
||||
api.testMode = testMode;
|
||||
|
||||
return api;
|
||||
}
|
||||
|
||||
return constructor();
|
||||
|
||||
}
|
||||
})();
|
||||
|
|
|
|||
|
|
@ -91,8 +91,8 @@
|
|||
now = (new Date()).getTime(); // Early as possible
|
||||
|
||||
arr = ws.rQshiftBytes(ws.rQlen());
|
||||
first = String.fromCharCode(arr.shift());
|
||||
last = String.fromCharCode(arr.pop());
|
||||
first = String.fromCharCode(arr[0]);
|
||||
last = String.fromCharCode(arr[arr.length-1]);
|
||||
|
||||
if (first != "^") {
|
||||
message("Error: packet missing start char '^'");
|
||||
|
|
@ -104,9 +104,11 @@
|
|||
disconnect();
|
||||
return;
|
||||
}
|
||||
arr = arr.map(function(num) {
|
||||
return String.fromCharCode(num);
|
||||
} ).join('').split(':');
|
||||
text = ''
|
||||
for (var i = 1; i < arr.length-1; i++) {
|
||||
text += String.fromCharCode(arr[i]);
|
||||
}
|
||||
arr = text.split(':');
|
||||
seq = arr[0];
|
||||
timestamp = parseInt(arr[1],10);
|
||||
rpayload = arr[2];
|
||||
|
|
|
|||
Loading…
Reference in New Issue