Split out common drivers from chat example.
This commit is contained in:
Tony Garnock-Jones
parent
b3e2d17966
commit
a9d3e4eca4
6
Makefile
6
Makefile
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@ -1,6 +1,10 @@
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APP_NAME=MarketplaceChat.app
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LIB_SOURCES=\
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marketplace.js
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marketplace.js \
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spy.js \
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jquery-driver.js \
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wake-detector.js \
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websocket-driver.js
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APP_SOURCES=\
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examples/chat/index.html \
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examples/chat/index.js \
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@ -11,6 +11,10 @@
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<script src="../../third-party/jquery-2.0.3.min.js"></script>
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<script src="../../marketplace.js"></script>
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<script src="../../spy.js"></script>
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<script src="../../jquery-driver.js"></script>
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<script src="../../wake-detector.js"></script>
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<script src="../../websocket-driver.js"></script>
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<script src="index.js"></script>
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</head>
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<body>
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@ -29,285 +29,6 @@ function decodeAction(j) {
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}
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}
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///////////////////////////////////////////////////////////////////////////
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// Generic Spy
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function Spy() {
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}
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Spy.prototype.boot = function () {
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World.updateRoutes([sub(__, 0, Infinity), pub(__, 0, Infinity)]);
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};
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Spy.prototype.handleEvent = function (e) {
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switch (e.type) {
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case "routes": console.log("SPY", "routes", e.routes); break;
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case "message": console.log("SPY", "message", e.message, e.metaLevel, e.isFeedback); break;
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default: console.log("SPY", "unknown", e); break;
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}
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};
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///////////////////////////////////////////////////////////////////////////
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// JQuery event driver
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function spawnJQueryDriver() {
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var d = new DemandMatcher(["jQuery", __, __, __]);
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d.onDemandIncrease = function (r) {
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var selector = r.pattern[1];
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var eventName = r.pattern[2];
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World.spawn(new JQueryEventRouter(selector, eventName),
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[pub(["jQuery", selector, eventName, __]),
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pub(["jQuery", selector, eventName, __], 0, 1)]);
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};
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World.spawn(d);
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}
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function JQueryEventRouter(selector, eventName) {
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var self = this;
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this.selector = selector;
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this.eventName = eventName;
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this.handler =
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World.wrap(function (e) {
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World.send(["jQuery", self.selector, self.eventName, e]);
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e.preventDefault();
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return false;
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});
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$(this.selector).on(this.eventName, this.handler);
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}
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JQueryEventRouter.prototype.handleEvent = function (e) {
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if (e.type === "routes" && e.routes.length === 0) {
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$(this.selector).off(this.eventName, this.handler);
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World.exit();
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}
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};
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///////////////////////////////////////////////////////////////////////////
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// Wake detector - notices when something (such as
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// suspension/sleeping!) has caused periodic activities to be
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// interrupted, and warns others about it
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// Inspired by http://blog.alexmaccaw.com/javascript-wake-event
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function WakeDetector(period) {
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this.message = "wake";
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this.period = period || 10000;
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this.mostRecentTrigger = +(new Date());
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this.timerId = null;
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}
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WakeDetector.prototype.boot = function () {
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var self = this;
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World.updateRoutes([pub(this.message)]);
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this.timerId = setInterval(World.wrap(function () { self.trigger(); }), this.period);
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};
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WakeDetector.prototype.handleEvent = function (e) {};
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WakeDetector.prototype.trigger = function () {
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var now = +(new Date());
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if (now - this.mostRecentTrigger > this.period * 1.5) {
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World.send(this.message);
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}
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this.mostRecentTrigger = now;
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};
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///////////////////////////////////////////////////////////////////////////
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// WebSocket client driver
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var DEFAULT_RECONNECT_DELAY = 100;
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var MAX_RECONNECT_DELAY = 30000;
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var DEFAULT_IDLE_TIMEOUT = 300000; // 5 minutes
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var DEFAULT_PING_INTERVAL = DEFAULT_IDLE_TIMEOUT - 10000;
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function WebSocketConnection(label, wsurl, shouldReconnect) {
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this.label = label;
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this.wsurl = wsurl;
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this.shouldReconnect = shouldReconnect ? true : false;
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this.reconnectDelay = DEFAULT_RECONNECT_DELAY;
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this.localRoutes = [];
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this.peerRoutes = [];
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this.prevPeerRoutesMessage = null;
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this.sock = null;
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this.deduplicator = new Deduplicator();
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this.activityTimestamp = 0;
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this.idleTimeout = DEFAULT_IDLE_TIMEOUT;
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this.pingInterval = DEFAULT_PING_INTERVAL;
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this.idleTimer = null;
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this.pingTimer = null;
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}
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WebSocketConnection.prototype.clearHeartbeatTimers = function () {
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if (this.idleTimer) { clearTimeout(this.idleTimer); this.idleTimer = null; }
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if (this.pingTimer) { clearTimeout(this.pingTimer); this.pingTimer = null; }
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};
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WebSocketConnection.prototype.recordActivity = function () {
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var self = this;
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this.activityTimestamp = +(new Date());
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this.clearHeartbeatTimers();
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this.idleTimer = setTimeout(function () { self.forceclose(); },
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this.idleTimeout);
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this.pingTimer = setTimeout(function () { self.safeSend(JSON.stringify("ping")) },
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this.pingInterval);
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};
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WebSocketConnection.prototype.statusRoute = function (status) {
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return pub([this.label + "_state", status]);
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};
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WebSocketConnection.prototype.relayRoutes = function () {
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// fresh copy each time, suitable for in-place extension/mutation
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return [this.statusRoute(this.isConnected() ? "connected" : "disconnected"),
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pub([this.label, __, __], 0, 1000),
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sub([this.label, __, __], 0, 1000)];
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};
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WebSocketConnection.prototype.aggregateRoutes = function () {
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var rs = this.relayRoutes();
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for (var i = 0; i < this.peerRoutes.length; i++) {
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var r = this.peerRoutes[i];
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rs.push(new Route(r.isSubscription,
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[this.label, __, r.pattern],
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r.metaLevel,
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r.level));
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}
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// console.log("WebSocketConnection.aggregateRoutes", this.label, rs);
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return rs;
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};
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WebSocketConnection.prototype.boot = function () {
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this.reconnect();
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};
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WebSocketConnection.prototype.trapexit = function () {
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this.forceclose();
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};
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WebSocketConnection.prototype.isConnected = function () {
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return this.sock && this.sock.readyState === this.sock.OPEN;
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};
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WebSocketConnection.prototype.safeSend = function (m) {
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try {
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if (this.isConnected()) { this.sock.send(m); }
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} catch (e) {
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console.warn("Trapped exn while sending", e);
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}
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};
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WebSocketConnection.prototype.sendLocalRoutes = function () {
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this.safeSend(JSON.stringify(encodeEvent(updateRoutes(this.localRoutes))));
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};
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WebSocketConnection.prototype.handleEvent = function (e) {
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// console.log("WebSocketConnection.handleEvent", e);
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switch (e.type) {
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case "routes":
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this.localRoutes = [];
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for (var i = 0; i < e.routes.length; i++) {
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var r = e.routes[i];
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if (r.pattern.length && r.pattern.length === 3
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&& r.pattern[0] === this.label
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&& typeof(r.pattern[1]) === "number")
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{
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this.localRoutes.push(new Route(r.isSubscription,
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r.pattern[2],
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r.pattern[1],
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r.level));
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}
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}
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this.sendLocalRoutes();
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break;
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case "message":
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var m = e.message;
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if (m.length && m.length === 3
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&& m[0] === this.label
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&& typeof(m[1]) === "number")
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{
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var encoded = JSON.stringify(encodeEvent(sendMessage(m[2], m[1], e.isFeedback)));
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if (this.deduplicator.accept(encoded)) {
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this.safeSend(encoded);
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}
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}
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break;
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}
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};
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WebSocketConnection.prototype.forceclose = function (keepReconnectDelay) {
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if (!keepReconnectDelay) {
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this.reconnectDelay = DEFAULT_RECONNECT_DELAY;
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}
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this.clearHeartbeatTimers();
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if (this.sock) {
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console.log("WebSocketConnection.forceclose called");
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this.sock.close();
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this.sock = null;
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}
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};
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WebSocketConnection.prototype.reconnect = function () {
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var self = this;
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this.forceclose(true);
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this.sock = new WebSocket(this.wsurl);
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this.sock.onopen = World.wrap(function (e) { return self.onopen(e); });
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this.sock.onmessage = World.wrap(function (e) { return self.onmessage(e); });
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this.sock.onclose = World.wrap(function (e) { return self.onclose(e); });
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};
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WebSocketConnection.prototype.onopen = function (e) {
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console.log("connected to " + this.sock.url);
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this.reconnectDelay = DEFAULT_RECONNECT_DELAY;
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this.sendLocalRoutes();
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};
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WebSocketConnection.prototype.onmessage = function (wse) {
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// console.log("onmessage", wse);
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this.recordActivity();
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var j = JSON.parse(wse.data);
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if (j === "ping") {
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this.safeSend(JSON.stringify("pong"));
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return;
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} else if (j === "pong") {
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return; // recordActivity already took care of our timers
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}
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var e = decodeAction(j);
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switch (e.type) {
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case "routes":
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if (this.prevPeerRoutesMessage !== wse.data) {
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this.prevPeerRoutesMessage = wse.data;
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this.peerRoutes = e.routes;
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World.updateRoutes(this.aggregateRoutes());
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}
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break;
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case "message":
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if (this.deduplicator.accept(wse.data)) {
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World.send([this.label, e.metaLevel, e.message], 0, e.isFeedback);
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}
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break;
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}
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};
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WebSocketConnection.prototype.onclose = function (e) {
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var self = this;
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console.log("onclose", e);
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// Update routes to give clients some indication of the discontinuity
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World.updateRoutes(this.aggregateRoutes());
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if (this.shouldReconnect) {
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console.log("reconnecting to " + this.wsurl + " in " + this.reconnectDelay + "ms");
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setTimeout(World.wrap(function () { self.reconnect(); }), this.reconnectDelay);
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this.reconnectDelay = this.reconnectDelay * 1.618 + (Math.random() * 1000);
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this.reconnectDelay =
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this.reconnectDelay > MAX_RECONNECT_DELAY
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? MAX_RECONNECT_DELAY + (Math.random() * 1000)
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: this.reconnectDelay;
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}
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};
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///////////////////////////////////////////////////////////////////////////
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// Main
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@ -0,0 +1,33 @@
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// JQuery event driver
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function spawnJQueryDriver() {
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var d = new DemandMatcher(["jQuery", __, __, __]);
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d.onDemandIncrease = function (r) {
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var selector = r.pattern[1];
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var eventName = r.pattern[2];
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World.spawn(new JQueryEventRouter(selector, eventName),
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[pub(["jQuery", selector, eventName, __]),
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pub(["jQuery", selector, eventName, __], 0, 1)]);
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};
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World.spawn(d);
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}
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function JQueryEventRouter(selector, eventName) {
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var self = this;
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this.selector = selector;
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this.eventName = eventName;
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this.handler =
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World.wrap(function (e) {
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World.send(["jQuery", self.selector, self.eventName, e]);
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e.preventDefault();
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return false;
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});
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$(this.selector).on(this.eventName, this.handler);
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}
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JQueryEventRouter.prototype.handleEvent = function (e) {
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if (e.type === "routes" && e.routes.length === 0) {
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$(this.selector).off(this.eventName, this.handler);
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World.exit();
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}
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};
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@ -0,0 +1,16 @@
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// Generic Spy
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function Spy() {
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}
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Spy.prototype.boot = function () {
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World.updateRoutes([sub(__, 0, Infinity), pub(__, 0, Infinity)]);
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};
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Spy.prototype.handleEvent = function (e) {
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switch (e.type) {
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case "routes": console.log("SPY", "routes", e.routes); break;
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case "message": console.log("SPY", "message", e.message, e.metaLevel, e.isFeedback); break;
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default: console.log("SPY", "unknown", e); break;
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}
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};
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@ -0,0 +1,27 @@
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// Wake detector - notices when something (such as
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// suspension/sleeping!) has caused periodic activities to be
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// interrupted, and warns others about it
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// Inspired by http://blog.alexmaccaw.com/javascript-wake-event
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function WakeDetector(period) {
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this.message = "wake";
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this.period = period || 10000;
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this.mostRecentTrigger = +(new Date());
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this.timerId = null;
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}
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WakeDetector.prototype.boot = function () {
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var self = this;
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World.updateRoutes([pub(this.message)]);
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this.timerId = setInterval(World.wrap(function () { self.trigger(); }), this.period);
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};
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WakeDetector.prototype.handleEvent = function (e) {};
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WakeDetector.prototype.trigger = function () {
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var now = +(new Date());
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if (now - this.mostRecentTrigger > this.period * 1.5) {
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World.send(this.message);
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}
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this.mostRecentTrigger = now;
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};
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@ -0,0 +1,195 @@
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// WebSocket client driver
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var DEFAULT_RECONNECT_DELAY = 100;
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var MAX_RECONNECT_DELAY = 30000;
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var DEFAULT_IDLE_TIMEOUT = 300000; // 5 minutes
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var DEFAULT_PING_INTERVAL = DEFAULT_IDLE_TIMEOUT - 10000;
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function WebSocketConnection(label, wsurl, shouldReconnect) {
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this.label = label;
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this.wsurl = wsurl;
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this.shouldReconnect = shouldReconnect ? true : false;
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this.reconnectDelay = DEFAULT_RECONNECT_DELAY;
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this.localRoutes = [];
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this.peerRoutes = [];
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this.prevPeerRoutesMessage = null;
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this.sock = null;
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this.deduplicator = new Deduplicator();
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this.activityTimestamp = 0;
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this.idleTimeout = DEFAULT_IDLE_TIMEOUT;
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this.pingInterval = DEFAULT_PING_INTERVAL;
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this.idleTimer = null;
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this.pingTimer = null;
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}
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WebSocketConnection.prototype.clearHeartbeatTimers = function () {
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if (this.idleTimer) { clearTimeout(this.idleTimer); this.idleTimer = null; }
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if (this.pingTimer) { clearTimeout(this.pingTimer); this.pingTimer = null; }
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};
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WebSocketConnection.prototype.recordActivity = function () {
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var self = this;
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this.activityTimestamp = +(new Date());
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this.clearHeartbeatTimers();
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this.idleTimer = setTimeout(function () { self.forceclose(); },
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this.idleTimeout);
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this.pingTimer = setTimeout(function () { self.safeSend(JSON.stringify("ping")) },
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this.pingInterval);
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};
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WebSocketConnection.prototype.statusRoute = function (status) {
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return pub([this.label + "_state", status]);
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};
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WebSocketConnection.prototype.relayRoutes = function () {
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// fresh copy each time, suitable for in-place extension/mutation
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return [this.statusRoute(this.isConnected() ? "connected" : "disconnected"),
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pub([this.label, __, __], 0, 1000),
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sub([this.label, __, __], 0, 1000)];
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};
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WebSocketConnection.prototype.aggregateRoutes = function () {
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var rs = this.relayRoutes();
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for (var i = 0; i < this.peerRoutes.length; i++) {
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var r = this.peerRoutes[i];
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rs.push(new Route(r.isSubscription,
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[this.label, __, r.pattern],
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r.metaLevel,
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r.level));
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}
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// console.log("WebSocketConnection.aggregateRoutes", this.label, rs);
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return rs;
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};
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WebSocketConnection.prototype.boot = function () {
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this.reconnect();
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};
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WebSocketConnection.prototype.trapexit = function () {
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this.forceclose();
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};
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WebSocketConnection.prototype.isConnected = function () {
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return this.sock && this.sock.readyState === this.sock.OPEN;
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};
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WebSocketConnection.prototype.safeSend = function (m) {
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try {
|
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if (this.isConnected()) { this.sock.send(m); }
|
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} catch (e) {
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console.warn("Trapped exn while sending", e);
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}
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};
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WebSocketConnection.prototype.sendLocalRoutes = function () {
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this.safeSend(JSON.stringify(encodeEvent(updateRoutes(this.localRoutes))));
|
||||
};
|
||||
|
||||
WebSocketConnection.prototype.handleEvent = function (e) {
|
||||
// console.log("WebSocketConnection.handleEvent", e);
|
||||
switch (e.type) {
|
||||
case "routes":
|
||||
this.localRoutes = [];
|
||||
for (var i = 0; i < e.routes.length; i++) {
|
||||
var r = e.routes[i];
|
||||
if (r.pattern.length && r.pattern.length === 3
|
||||
&& r.pattern[0] === this.label
|
||||
&& typeof(r.pattern[1]) === "number")
|
||||
{
|
||||
this.localRoutes.push(new Route(r.isSubscription,
|
||||
r.pattern[2],
|
||||
r.pattern[1],
|
||||
r.level));
|
||||
}
|
||||
}
|
||||
this.sendLocalRoutes();
|
||||
break;
|
||||
case "message":
|
||||
var m = e.message;
|
||||
if (m.length && m.length === 3
|
||||
&& m[0] === this.label
|
||||
&& typeof(m[1]) === "number")
|
||||
{
|
||||
var encoded = JSON.stringify(encodeEvent(sendMessage(m[2], m[1], e.isFeedback)));
|
||||
if (this.deduplicator.accept(encoded)) {
|
||||
this.safeSend(encoded);
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
};
|
||||
|
||||
WebSocketConnection.prototype.forceclose = function (keepReconnectDelay) {
|
||||
if (!keepReconnectDelay) {
|
||||
this.reconnectDelay = DEFAULT_RECONNECT_DELAY;
|
||||
}
|
||||
this.clearHeartbeatTimers();
|
||||
if (this.sock) {
|
||||
console.log("WebSocketConnection.forceclose called");
|
||||
this.sock.close();
|
||||
this.sock = null;
|
||||
}
|
||||
};
|
||||
|
||||
WebSocketConnection.prototype.reconnect = function () {
|
||||
var self = this;
|
||||
this.forceclose(true);
|
||||
this.sock = new WebSocket(this.wsurl);
|
||||
this.sock.onopen = World.wrap(function (e) { return self.onopen(e); });
|
||||
this.sock.onmessage = World.wrap(function (e) { return self.onmessage(e); });
|
||||
this.sock.onclose = World.wrap(function (e) { return self.onclose(e); });
|
||||
};
|
||||
|
||||
WebSocketConnection.prototype.onopen = function (e) {
|
||||
console.log("connected to " + this.sock.url);
|
||||
this.reconnectDelay = DEFAULT_RECONNECT_DELAY;
|
||||
this.sendLocalRoutes();
|
||||
};
|
||||
|
||||
WebSocketConnection.prototype.onmessage = function (wse) {
|
||||
// console.log("onmessage", wse);
|
||||
this.recordActivity();
|
||||
|
||||
var j = JSON.parse(wse.data);
|
||||
if (j === "ping") {
|
||||
this.safeSend(JSON.stringify("pong"));
|
||||
return;
|
||||
} else if (j === "pong") {
|
||||
return; // recordActivity already took care of our timers
|
||||
}
|
||||
|
||||
var e = decodeAction(j);
|
||||
switch (e.type) {
|
||||
case "routes":
|
||||
if (this.prevPeerRoutesMessage !== wse.data) {
|
||||
this.prevPeerRoutesMessage = wse.data;
|
||||
this.peerRoutes = e.routes;
|
||||
World.updateRoutes(this.aggregateRoutes());
|
||||
}
|
||||
break;
|
||||
case "message":
|
||||
if (this.deduplicator.accept(wse.data)) {
|
||||
World.send([this.label, e.metaLevel, e.message], 0, e.isFeedback);
|
||||
}
|
||||
break;
|
||||
}
|
||||
};
|
||||
|
||||
WebSocketConnection.prototype.onclose = function (e) {
|
||||
var self = this;
|
||||
console.log("onclose", e);
|
||||
|
||||
// Update routes to give clients some indication of the discontinuity
|
||||
World.updateRoutes(this.aggregateRoutes());
|
||||
|
||||
if (this.shouldReconnect) {
|
||||
console.log("reconnecting to " + this.wsurl + " in " + this.reconnectDelay + "ms");
|
||||
setTimeout(World.wrap(function () { self.reconnect(); }), this.reconnectDelay);
|
||||
this.reconnectDelay = this.reconnectDelay * 1.618 + (Math.random() * 1000);
|
||||
this.reconnectDelay =
|
||||
this.reconnectDelay > MAX_RECONNECT_DELAY
|
||||
? MAX_RECONNECT_DELAY + (Math.random() * 1000)
|
||||
: this.reconnectDelay;
|
||||
}
|
||||
};
|
||||
Loading…
Reference in New Issue