--- googlecode.com/svn/trunk/public_html/meteor.js	2007/12/20 21:24:24	32
+++ googlecode.com/svn/trunk/public_html/meteor.js	2009/01/19 11:19:41	64
@@ -25,17 +25,35 @@
 	mode: "stream",
 	pingtimeout: 20000,
 	pingtimer: null,
-	pollfreq: 5000,
+	pollfreq: 3000,
 	port: 80,
+	pollaborted: false,
+	pollhost: null,
+	pollnum: 0,
 	polltimeout: 30000,
+	polltimer: null,
 	recvtimes: [],
+	lastrequest: null,
 	status: 0,
 	updatepollfreqtimer: null,
 
+	isSupportedBrowser: function() {
+		var v;
+		if (v = navigator.userAgent.match(/compatible\; MSIE\ ([0-9\.]+)\;/i)) {
+			if (parseFloat(v[1]) <= 5.5) return false;
+		} else if (v = navigator.userAgent.match(/Gecko\/([0-9]+)/i)) {
+			if (parseInt(v[1]) <= 20051015) return false;
+		} else if (v = navigator.userAgent.match(/WebKit\/([0-9\.]+)/i)) {
+			if (parseFloat(v[1]) < 400) return false;
+		}
+		return true;
+	},
+
 	register: function(ifr) {
 		ifr.p = Meteor.process;
 		ifr.r = Meteor.reset;
 		ifr.eof = Meteor.eof;
+		ifr.ch = Meteor.channelInfo;
 		clearTimeout(Meteor.frameloadtimer);
 		Meteor.setstatus(4);
 		Meteor.log("Frame registered");
@@ -43,30 +61,29 @@
 
 	joinChannel: function(channelname, backtrack) {
 		if (typeof(Meteor.channels[channelname]) != "undefined") throw "Cannot join channel "+channelname+": already subscribed";
-		Meteor.channels[channelname] = {backtrack:backtrack, lastmsgreceived:0};
+		Meteor.channels[channelname] = {backtrack:backtrack};
 		Meteor.log("Joined channel "+channelname);
 		Meteor.channelcount++;
-		if (Meteor.status != 0) Meteor.connect();
+		if (Meteor.status != 0 && Meteor.status != 6) Meteor.connect();
 	},
 
 	leaveChannel: function(channelname) {
 		if (typeof(Meteor.channels[channelname]) == "undefined") throw "Cannot leave channel "+channelname+": not subscribed";
 		delete Meteor.channels[channelname];
 		Meteor.log("Left channel "+channelname);
-		if (Meteor.status != 0) Meteor.connect();
 		Meteor.channelcount--;
+		if (Meteor.channelcount && Meteor.status != 0 && Meteor.status != 6) Meteor.connect();
+		else Meteor.disconnect();
 	},
 
 	connect: function() {
-		Meteor.log("Connecting");
 		if (!Meteor.host) throw "Meteor host not specified";
 		if (isNaN(Meteor.port)) throw "Meteor port not specified";
 		if (!Meteor.channelcount) throw "No channels specified";
 		if (Meteor.status) Meteor.disconnect();
+		Meteor.log("Connecting");
 		Meteor.setstatus(1);
-		var now = new Date();
-		var t = now.getTime();
-		if (!Meteor.hostid) Meteor.hostid = t+""+Math.floor(Math.random()*1000000)
+		if (!Meteor.hostid) Meteor.hostid = Meteor.time()+""+Math.floor(Math.random()*1000000)
 		document.domain = Meteor.extract_xss_domain(document.domain);
 		if (Meteor.mode=="stream") Meteor.mode = Meteor.selectStreamTransport();
 		Meteor.log("Selected "+Meteor.mode+" transport");
@@ -80,24 +97,25 @@
 			Meteor.pingtimer = setTimeout(Meteor.pollmode, Meteor.pingtimeout);
 
 		} else {
-			Meteor.loadFrame("http://"+Meteor.host+((Meteor.port==80)?"":":"+Meteor.port)+"/poll.html");
-			Meteor.recvtimes[0] = t;
+			Meteor.recvtimes[0] = Meteor.time();
 			if (Meteor.updatepollfreqtimer) clearTimeout(Meteor.updatepollfreqtimer);
-			if (Meteor.mode=='smartpoll') Meteor.updatepollfreqtimer = setInterval(Meteor.updatepollfreq, 2500);
+			if (Meteor.mode=='smartpoll') Meteor.updatepollfreqtimer = setInterval(Meteor.updatepollfreq, 10000);
 			if (Meteor.mode=='longpoll') Meteor.pollfreq = Meteor.minpollfreq;
+			Meteor.poll();
 		}
-		Meteor.lastrequest = t;
 	},
 
 	disconnect: function() {
 		if (Meteor.status) {
-			if (typeof(Meteor.frameref)=="iframe") Meteor.frameref.setAttribute("src", "about:blank");
-			Meteor.frameref = null;
+			if (Meteor.status != 6) Meteor.setstatus(0);
+			Meteor.clearpoll();
 			clearTimeout(Meteor.pingtimer);
 			clearTimeout(Meteor.updatepollfreqtimer);
 			clearTimeout(Meteor.frameloadtimer);
 			if (typeof CollectGarbage == 'function') CollectGarbage();
-			Meteor.setstatus(0);
+			Meteor.log("Disconnected");
+			try { Meteor.frameref.parentNode.removeChild(Meteor.frameref); delete Meteor.frameref; return true; } catch(e) { }
+			try { Meteor.frameref.open(); Meteor.frameref.close(); return true; } catch(e) {}			
 		}
 	},
 	
@@ -111,47 +129,52 @@
 	},
 
 	getSubsUrl: function() {
-		var surl = "http://" + Meteor.host + ((Meteor.port==80)?"":":"+Meteor.port) + "/push/" + Meteor.hostid + "/" + Meteor.mode;
+		var host = ((Meteor.mode=='simplepoll' || Meteor.mode=='smartpoll' || Meteor.mode=='longpoll') && Meteor.pollhost) ? Meteor.pollhost : Meteor.host;
+		var surl = "http://" + host + ((Meteor.port==80)?"":":"+Meteor.port) + "/push/" + Meteor.hostid + "/" + Meteor.mode;
 		for (var c in Meteor.channels) {
 			surl += "/"+c;
-			if (Meteor.channels[c].lastmsgreceived > 0) {
+			if (typeof Meteor.channels[c].lastmsgreceived != 'undefined') {
 				surl += ".r"+(Meteor.channels[c].lastmsgreceived+1);
 			} else if (Meteor.channels[c].backtrack > 0) {
 				surl += ".b"+Meteor.channels[c].backtrack;
-			} else if (Meteor.channels[c].backtrack < 0 || isNaN(Meteor.channels[c].backtrack)) {
+			} else if (Meteor.channels[c].backtrack != undefined) {
 				surl += ".h";
 			}
 		}
+		surl += "?nc="+Meteor.time();
 		return surl;
 	},
 
 	loadFrame: function(url) {
-		Meteor.frameref = null;
 		try {
-			var transferDoc = new ActiveXObject("htmlfile");
-			transferDoc.open();
-			transferDoc.write("<html><script>");
-			transferDoc.write("document.domain=\""+(document.domain)+"\";");
-			transferDoc.write("</"+"script></html>");
-			transferDoc.parentWindow.Meteor = Meteor;
-			transferDoc.close();
-			var ifrDiv = transferDoc.createElement("div");
-			transferDoc.appendChild(ifrDiv);
+			if (!Meteor.frameref) {
+				var transferDoc = new ActiveXObject("htmlfile");
+				Meteor.frameref = transferDoc;
+			}
+			Meteor.frameref.open();
+			Meteor.frameref.write("<html><script>");
+			Meteor.frameref.write("document.domain=\""+(document.domain)+"\";");
+			Meteor.frameref.write("</"+"script></html>");
+			Meteor.frameref.parentWindow.Meteor = Meteor;
+			Meteor.frameref.close();
+			var ifrDiv = Meteor.frameref.createElement("div");
+			Meteor.frameref.appendChild(ifrDiv);
 			ifrDiv.innerHTML = "<iframe src=\""+url+"\"></iframe>";
-			Meteor.frameref = transferDoc;
 		} catch (e) {
-			var ifr = document.createElement("IFRAME");
-			ifr.style.width = "10px";
-			ifr.style.height = "10px";
-			ifr.style.border = "none";
-			ifr.style.position = "absolute";
-			ifr.style.top = "-10px";
-			ifr.style.marginTop = "-10px";
-			ifr.style.zIndex = "-20";
-			ifr.Meteor = Meteor;
-			ifr.setAttribute("src", url);
-			document.body.appendChild(ifr);
-			Meteor.frameref = ifr;
+			if (!Meteor.frameref) {
+				var ifr = document.createElement("IFRAME");
+				ifr.style.width = "10px";
+				ifr.style.height = "10px";
+				ifr.style.border = "none";
+				ifr.style.position = "absolute";
+				ifr.style.top = "-10px";
+				ifr.style.marginTop = "-10px";
+				ifr.style.zIndex = "-20";
+				ifr.Meteor = Meteor;
+				document.body.appendChild(ifr);
+				Meteor.frameref = ifr;
+			}
+			Meteor.frameref.setAttribute("src", url);
 		}
 		Meteor.log("Loading URL '"+url+"' into frame...");
 		Meteor.frameloadtimer = setTimeout(Meteor.frameloadtimeout, 5000);
@@ -159,24 +182,25 @@
 
 	pollmode: function() {
 		Meteor.log("Ping timeout");
-		Meteor.mode="smartpoll";
-		clearTimeout(Meteor.pingtimer);
+		if (Meteor.mode != "smartpoll") {
+			Meteor.mode="smartpoll";
+			Meteor.callbacks["changemode"]("poll");
+			clearTimeout(Meteor.pingtimer);
+			Meteor.lastpingtime = false;
+		}
 		Meteor.connect();
-		Meteor.callbacks["changemode"]("poll");
-		Meteor.lastpingtime = false;
 	},
 
 	process: function(id, channel, data) {
 		if (id == -1) {
 			Meteor.log("Ping");
 			Meteor.ping();
-		} else if (typeof(Meteor.channels[channel]) != "undefined" && id > Meteor.channels[channel].lastmsgreceived) {
+		} else if (typeof(Meteor.channels[channel]) != "undefined") {
 			Meteor.log("Message "+id+" received on channel "+channel+" (last id on channel: "+Meteor.channels[channel].lastmsgreceived+")\n"+data);
 			Meteor.callbacks["process"](data);
 			Meteor.channels[channel].lastmsgreceived = id;
 			if (Meteor.mode=="smartpoll") {
-				var now = new Date();
-				Meteor.recvtimes[Meteor.recvtimes.length] = now.getTime();
+				Meteor.recvtimes[Meteor.recvtimes.length] = Meteor.time();
 				while (Meteor.recvtimes.length > 5) Meteor.recvtimes.shift();
 			}
 		}
@@ -187,35 +211,40 @@
 		if (Meteor.pingtimer) {
 			clearTimeout(Meteor.pingtimer);
 			Meteor.pingtimer = setTimeout(Meteor.pollmode, Meteor.pingtimeout);
-			var now = new Date();
-			Meteor.lastpingtime = now.getTime();
+			Meteor.lastpingtime = Meteor.time();
 		}
 		Meteor.setstatus(5);
 	},
 
 	reset: function() {
-		Meteor.log("Stream reset");
-		Meteor.ping();
-		Meteor.callbacks["reset"]();
-		var now = new Date();
-		var t = now.getTime();
-		var x = Meteor.pollfreq - (t-Meteor.lastrequest);
-		if (x < 10) x = 10;
-		setTimeout(Meteor.connect, x);
+		if (Meteor.status != 6 && Meteor.status != 0) {
+			Meteor.log("Stream reset");
+			Meteor.ping();
+			Meteor.callbacks["reset"]();
+			var x = Meteor.pollfreq - (Meteor.time()-Meteor.lastrequest);
+			if (x < 10) x = 10;
+			setTimeout(Meteor.connect, x);
+		}
 	},
 
 	eof: function() {
+		Meteor.log("Received end of stream, will not reconnect");
 		Meteor.callbacks["eof"]();
+		Meteor.setstatus(6);
+		Meteor.disconnect();
+	},
+
+	channelInfo: function(channel, id) {
+		Meteor.channels[channel].lastmsgreceived = id;
+		Meteor.log("Received channel info for channel "+channel+": resume from "+id);
 	},
 
 	updatepollfreq: function() {
-		var now = new Date();
-		var t = now.getTime();
 		var avg = 0;
 		for (var i=1; i<Meteor.recvtimes.length; i++) {
 			avg += (Meteor.recvtimes[i]-Meteor.recvtimes[i-1]);
 		}
-		avg += (t-Meteor.recvtimes[Meteor.recvtimes.length-1]);
+		avg += (Meteor.time()-Meteor.recvtimes[Meteor.recvtimes.length-1]);
 		avg /= Meteor.recvtimes.length;
 		var target = avg/2;
 		if (target < Meteor.pollfreq && Meteor.pollfreq > Meteor.minpollfreq) Meteor.pollfreq = Math.ceil(Meteor.pollfreq*0.9);
@@ -241,7 +270,7 @@
 		Meteor.log("Frame load timeout");
 		if (Meteor.frameloadtimer) clearTimeout(Meteor.frameloadtimer);
 		Meteor.setstatus(3);
-		setTimeout(Meteor.connect, 5000);
+		Meteor.pollmode();
 	},
 
 	extract_xss_domain: function(old_domain) {
@@ -257,6 +286,7 @@
 		//				3 = Controller frame timeout, retrying.
 		//				4 = Controller frame loaded and ready
 		//				5 = Receiving data
+		//				6 = End of stream, will not reconnect
 
 		if (Meteor.status != newstatus) {
 			Meteor.status = newstatus;
@@ -272,6 +302,38 @@
 				document.getElementById("meteorlogoutput").innerHTML += logstr+"<br/>";
 			}
 		}
+	},
+
+	poll: function() {
+		Meteor.pollaborted = 0;
+		try {
+			clearTimeout(Meteor.polltimer);
+		} catch (e) {};
+		Meteor.lastrequest = Meteor.time();
+		if (Meteor.polltimeout) Meteor.polltimer = setTimeout(Meteor.clearpoll, Meteor.polltimeout);
+		var scripttag = document.createElement("SCRIPT");
+		scripttag.type = "text/javascript";
+		scripttag.src = Meteor.getSubsUrl();
+		scripttag.id = "meteorpoll"+(++Meteor.pollnum);
+		scripttag.className = "meteorpoll";
+		document.getElementsByTagName("HEAD")[0].appendChild(scripttag);
+	},
+
+	clearpoll: function() {
+		if (document.getElementById('meteorpoll'+Meteor.pollnum)) {
+			var s = document.getElementById('meteorpoll'+Meteor.pollnum);
+			s.parentNode.removeChild(s);
+		}
+		if (Meteor.status == 5) {
+			var x = parent.Meteor.pollfreq - (Meteor.time()-Meteor.lastrequest);
+			if (x < 10) x = 10;
+			setTimeout(Meteor.poll, x);
+		}
+	},
+
+	time: function() {
+		var now = new Date();
+		return now.getTime();
 	}
 }