trunk/public_html/meteor.js

// Set domain at highest level
var domainparts = document.domain.split(".");
document.domain = domainparts[domainparts.length-2]+"."+domainparts[domainparts.length-1];

Function.prototype.bind = function(obj) {
        var method = this,
        temp = function() {
                return method.apply(obj, arguments);
        };
        return temp;
}
Function.prototype.andThen=function(g) {
        var f=this;
        var a=this.arguments
        return function(args) {
                f(a);g(args);
        }
};

function Meteor(instID) {

        this.lastmsgreceived = -1;
        this.transferDoc = false;
        this.pingtimer = false;
        this.updatepollfreqtimer = false;
        this.lastrequest = 0;
        this.recvtimes = new Array();
        this.MHostId = false;
        this.callback_process = function() {};
        this.callback_reset = function() {};
        this.callback_eof = function() {};
        this.callback_changemode = function() {};
        this.persist = true;

        // Documented public properties
        this.channel = false;
        this.subdomain = "data";
        this.dynamicpageaddress = "push";
        this.backtrack = 0;
        this.smartpoll = true;
        this.pollfreq = 2000;
        this.minpollfreq = 2000;
        this.mode = "stream";
        this.polltimeout=30000;
        this.maxmessages=0;
        this.pingtimeout = 10000;

        // Set or retrieve host id.  Cookie takes this form:
        // MeteorID=123:6356353/124:098320454;
        var MeteIds = Meteor.readCookie("MeteorID");
        var regex1 = new RegExp("^([0-9\:\/M]+\/)*"+instID+"\:([^\/]+)(\/[0-9\:\/M]+)*$");
        var regex2 = new RegExp("^([0-9\:\/M]+\/)*M\:([^\/]+)(\/[0-9\:\/M]+)*$");
        if (typeof(instID) == "Number" && regex1.exec(MeteIds)) {
                this.MHostId = ma[2];
        } else if (typeof(instID) == "Number") {
                this.MHostId = Math.floor(Math.random()*1000000);
                var newcookie = (MeteIds)?MeteIds+"/":"";
                newcookie += instID+":"+this.MHostId;
                Meteor.createCookie("MeteorID", newcookie);
        } else if (ma = regex2.exec(MeteIds)) {
                this.MHostId = ma[2];
        } else {
                this.MHostId = Math.floor(Math.random()*1000000);
                var newcookie = (MeteIds)?MeteIds+"/":"";
                newcookie += "M:"+this.MHostId;
                Meteor.createCookie("MeteorID", newcookie);
        }
        this.instID = (typeof(instID) != "undefined") ? instID : 0;
}

Meteor.instances = new Array();
Meteor.servertimeoffset = 0;

Meteor.create = function(instID) {
        if (!instID) instID = 0;
        Meteor.instances[instID] = new Meteor(instID);
        return Meteor.instances[instID];
}

Meteor.register = function(ifr) {
        instid = new String(ifr.window.frameElement.id);
        instid = instid.replace("meteorframe_", "");
        ifr.p = this.instances[instid].process.bind(this.instances[instid]);
        ifr.r = this.instances[instid].reset.bind(this.instances[instid]);
        ifr.eof = this.instances[instid].eof.bind(this.instances[instid]);
        ifr.get = this.instances[instid].get.bind(this.instances[instid]);
        ifr.increasepolldelay = this.instances[instid].increasepolldelay.bind(this.instances[instid]);
}

Meteor.setServerTime = function(timestamp) {
        var now = new Date();
        var clienttime = (now.getTime() / 1000);
        Meteor.servertimeoffset = timestamp - clienttime;
}

Meteor.prototype.start = function() {
        this.persist = (this.maxmessages)?1:0;
        this.smartpoll = (this.smartpoll)?1:0;
        this.mode = (this.mode=="stream")?"stream":"poll";
        if (!this.subdomain || !this.channel) throw "Channel or Meteor subdomain host not specified";
        var now = new Date();
        var t = now.getTime();
        if (typeof(this.transferDoc)=="object") {
                this.transferDoc.open();
                this.transferDoc.close();
                delete this.transferDoc;
        }
        if (document.getElementById("meteorframe_"+this.instID)) {
                document.body.removeChild(document.getElementById("meteorframe_"+this.instID));
        }
        if (this.mode=="stream") {
                if (document.all) {
                        this.transferDoc = new ActiveXObject("htmlfile");
                        this.transferDoc.open();
                        this.transferDoc.write("<html>");
                        this.transferDoc.write("<script>document.domain=\""+(document.domain)+"\";</"+"script>");
                        this.transferDoc.write("</html>");
                        var selfref = this;
                        this.transferDoc.parentWindow.Meteor = Meteor;
                        this.transferDoc.close();
                        var ifrDiv = this.transferDoc.createElement("div");
                        this.transferDoc.appendChild(ifrDiv);
                        var url = "http://"+this.subdomain+"."+location.hostname+"/"+this.dynamicpageaddress+"?channel="+this.channel+"&id="+this.MHostId;
                        if (this.lastmsgreceived >= 0) {
                                url += "&restartfrom="+this.lastmsgreceived;
                        } else if (this.backtrack > 0) {
                                url += "&backtrack="+this.backtrack;
                        } else if (this.backtrack < 0 || isNaN(this.backtrack)) {
                                url += "&restartfrom=";
                        }
                        ifrDiv.innerHTML = "<iframe id=\"meteorframe_"+this.instID+"\" src=\""+url+"&nocache="+t+"\" style=\"display: none;\"></iframe>";
                } else {
                        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.id = "meteorframe_"+this.instID;
                        document.body.appendChild(ifr);
                        ifr.src = "http://"+this.subdomain+"."+location.hostname+"/stream.html?nocache="+t;
                }
                var f = this.pollmode.bind(this);
                clearTimeout(this.pingtimer);
                this.pingtimer = setTimeout(f, this.pingtimeout);

        } else {
                var ifr = document.createElement("IFRAME");
                ifr.style.width = "10px";
                ifr.style.height = "10px";
                ifr.style.border = "none";
                if (document.all) {
                        ifr.style.display = "none";
                } else {
                        ifr.style.position = "absolute";
                        ifr.style.marginTop = "-10px";
                        ifr.style.zIndex = "-20";
                }
                ifr.id = "meteorframe_"+this.instID;
                document.body.appendChild(ifr);
                ifr.src = "http://"+this.subdomain+"."+location.hostname+"/poll.html?nocache="+t;
                this.recvtimes[0] = t;
                if (this.updatepollfreqtimer) clearTimeout(this.updatepollfreqtimer);
                this.updatepollfreqtimer = setInterval(this.updatepollfreq.bind(this), 2500);
        }
        this.lastrequest = t;
}

Meteor.prototype.pollmode = function() {
        this.mode="poll";
        this.start();
        this.callback_changemode("poll");
}

Meteor.prototype.process = function(id, data) {
        if (id > this.lastmsgreceived) {
                this.callback_process(data);
                if (id != -1) this.lastmsgreceived = id;
                if (this.mode=="poll") {
                        var now = new Date();
                        var t = now.getTime();
                        this.recvtimes[this.recvtimes.length] = t;
                        while (this.recvtimes.length > 5) this.recvtimes.shift();
                }
        } else if (id == -1) {
                this.ping();
        }
}

Meteor.prototype.ping = function() {
        if (this.mode=="stream" && this.pingtimer) {
                clearTimeout(this.pingtimer);
                var f = this.pollmode.bind(this);
                this.pingtimer = setTimeout(f, this.pingtimeout);
                var now = new Date();
                this.lastpingtime = now.getTime();
        }
}

Meteor.prototype.reset = function() {
        var now = new Date();
        var t = now.getTime();
        var x = this.pollfreq - (t-this.lastrequest);
        if (x < 10) x = 10;
        this.ping();
        this.callback_reset();
        setTimeout(this.start.bind(this), x);
}

Meteor.prototype.eof = function() {
        this.callback_eof();
}

Meteor.prototype.get = function(varname) {
        eval("var a = this."+varname+";");
        if (typeof(a) == "undefined") throw "Cannot get value of "+varname;
        return a;
}

Meteor.prototype.increasepolldelay = function() {
        this.pollfreq *= 2;
}

Meteor.prototype.updatepollfreq = function() {
        if (this.smartpoll) {
                var now = new Date();
                var t = now.getTime();
                var avg = 0;
                for (var i=1; i<this.recvtimes.length; i++) {
                        var x = (this.recvtimes[i]-this.recvtimes[i-1]);
                        avg += (x>60000)? 60000 : x;
                }
                x = (t-this.recvtimes[this.recvtimes.length-1]);
                avg += (x>180000)? 180000 : x;
                avg /= this.recvtimes.length;
                if ((avg/3) < this.pollfreq && (avg/3) >= this.minpollfreq) this.pollfreq = Math.ceil(this.pollfreq*0.9);
                if ((avg/3) > this.pollfreq) this.pollfreq = Math.floor(this.pollfreq*1.05);
        }
}

Meteor.prototype.registerEventCallback = function(evt, funcRef) {
        if (evt=="process") {
                this.callback_process = (this.callback_process).andThen(funcRef);
        } else if (evt=="reset") {
                this.callback_reset = (this.callback_reset).andThen(funcRef);
        } else if (evt=="eof") {
                this.callback_eof = (this.callback_eof).andThen(funcRef);
        } else if (evt=="changemode") {
                this.callback_changemode = (this.callback_changemode).andThen(funcRef);
        }
}


Meteor.createCookie = function(name,value,days) {
        if (days) {
                var date = new Date();
                date.setTime(date.getTime()+(days*24*60*60*1000));
                var expires = "; expires="+date.toGMTString();
        }
        else var expires = "";
        document.cookie = name+"="+value+expires+"; path=/";
}

Meteor.readCookie = function(name) {
        var nameEQ = name + "=";
        var ca = document.cookie.split(';');
        for(var i=0;i < ca.length;i++) {
                var c = ca[i];
                while (c.charAt(0)==' ') c = c.substring(1,c.length);
                if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
        }
        return null;
}

Meteor.eraseCookie = function(name) {
        createCookie(name,"",-1);
}
1	// Set domain at highest level
2	var domainparts = document.domain.split(".");
3	document.domain = domainparts[domainparts.length-2]+"."+domainparts[domainparts.length-1];
4
5	Function.prototype.bind = function(obj) {
6	var method = this,
7	temp = function() {
8	return method.apply(obj, arguments);
9	};
10	return temp;
11	}
12	Function.prototype.andThen=function(g) {
13	var f=this;
14	var a=this.arguments
15	return function(args) {
16	f(a);g(args);
17	}
18	};
19
20	function Meteor(instID) {
21
22	this.lastmsgreceived = -1;
23	this.transferDoc = false;
24	this.pingtimer = false;
25	this.updatepollfreqtimer = false;
26	this.lastrequest = 0;
27	this.recvtimes = new Array();
28	this.MHostId = false;
29	this.callback_process = function() {};
30	this.callback_reset = function() {};
31	this.callback_eof = function() {};
32	this.callback_changemode = function() {};
33	this.persist = true;
34
35	// Documented public properties
36	this.channel = false;
37	this.subdomain = "data";
38	this.dynamicpageaddress = "push";
39	this.backtrack = 0;
40	this.smartpoll = true;
41	this.pollfreq = 2000;
42	this.minpollfreq = 2000;
43	this.mode = "stream";
44	this.polltimeout=30000;
45	this.maxmessages=0;
46	this.pingtimeout = 10000;
47
48	// Set or retrieve host id. Cookie takes this form:
49	// MeteorID=123:6356353/124:098320454;
50	var MeteIds = Meteor.readCookie("MeteorID");
51	var regex1 = new RegExp("^([0-9\:\/M]+\/)"+instID+"\:([^\/]+)(\/[0-9\:\/M]+)$");
52	var regex2 = new RegExp("^([0-9\:\/M]+\/)M\:([^\/]+)(\/[0-9\:\/M]+)$");
53	if (typeof(instID) == "Number" && regex1.exec(MeteIds)) {
54	this.MHostId = ma[2];
55	} else if (typeof(instID) == "Number") {
56	this.MHostId = Math.floor(Math.random()*1000000);
57	var newcookie = (MeteIds)?MeteIds+"/":"";
58	newcookie += instID+":"+this.MHostId;
59	Meteor.createCookie("MeteorID", newcookie);
60	} else if (ma = regex2.exec(MeteIds)) {
61	this.MHostId = ma[2];
62	} else {
63	this.MHostId = Math.floor(Math.random()*1000000);
64	var newcookie = (MeteIds)?MeteIds+"/":"";
65	newcookie += "M:"+this.MHostId;
66	Meteor.createCookie("MeteorID", newcookie);
67	}
68	this.instID = (typeof(instID) != "undefined") ? instID : 0;
69	}
70
71	Meteor.instances = new Array();
72	Meteor.servertimeoffset = 0;
73
74	Meteor.create = function(instID) {
75	if (!instID) instID = 0;
76	Meteor.instances[instID] = new Meteor(instID);
77	return Meteor.instances[instID];
78	}
79
80	Meteor.register = function(ifr) {
81	instid = new String(ifr.window.frameElement.id);
82	instid = instid.replace("meteorframe_", "");
83	ifr.p = this.instances[instid].process.bind(this.instances[instid]);
84	ifr.r = this.instances[instid].reset.bind(this.instances[instid]);
85	ifr.eof = this.instances[instid].eof.bind(this.instances[instid]);
86	ifr.get = this.instances[instid].get.bind(this.instances[instid]);
87	ifr.increasepolldelay = this.instances[instid].increasepolldelay.bind(this.instances[instid]);
88	}
89
90	Meteor.setServerTime = function(timestamp) {
91	var now = new Date();
92	var clienttime = (now.getTime() / 1000);
93	Meteor.servertimeoffset = timestamp - clienttime;
94	}
95
96	Meteor.prototype.start = function() {
97	this.persist = (this.maxmessages)?1:0;
98	this.smartpoll = (this.smartpoll)?1:0;
99	this.mode = (this.mode=="stream")?"stream":"poll";
100	if (!this.subdomain \|\| !this.channel) throw "Channel or Meteor subdomain host not specified";
101	var now = new Date();
102	var t = now.getTime();
103	if (typeof(this.transferDoc)=="object") {
104	this.transferDoc.open();
105	this.transferDoc.close();
106	delete this.transferDoc;
107	}
108	if (document.getElementById("meteorframe_"+this.instID)) {
109	document.body.removeChild(document.getElementById("meteorframe_"+this.instID));
110	}
111	if (this.mode=="stream") {
112	if (document.all) {
113	this.transferDoc = new ActiveXObject("htmlfile");
114	this.transferDoc.open();
115	this.transferDoc.write("<html>");
116	this.transferDoc.write("<script>document.domain=\""+(document.domain)+"\";</"+"script>");
117	this.transferDoc.write("</html>");
118	var selfref = this;
119	this.transferDoc.parentWindow.Meteor = Meteor;
120	this.transferDoc.close();
121	var ifrDiv = this.transferDoc.createElement("div");
122	this.transferDoc.appendChild(ifrDiv);
123	var url = "http://"+this.subdomain+"."+location.hostname+"/"+this.dynamicpageaddress+"?channel="+this.channel+"&id="+this.MHostId;
124	if (this.lastmsgreceived >= 0) {
125	url += "&restartfrom="+this.lastmsgreceived;
126	} else if (this.backtrack > 0) {
127	url += "&backtrack="+this.backtrack;
128	} else if (this.backtrack < 0 \|\| isNaN(this.backtrack)) {
129	url += "&restartfrom=";
130	}
131	ifrDiv.innerHTML = "<iframe id=\"meteorframe_"+this.instID+"\" src=\""+url+"&nocache="+t+"\" style=\"display: none;\"></iframe>";
132	} else {
133	var ifr = document.createElement("IFRAME");
134	ifr.style.width = "10px";
135	ifr.style.height = "10px";
136	ifr.style.border = "none";
137	ifr.style.position = "absolute";
138	ifr.style.top = "-10px";
139	ifr.style.marginTop = "-10px";
140	ifr.style.zIndex = "-20";
141	ifr.id = "meteorframe_"+this.instID;
142	document.body.appendChild(ifr);
143	ifr.src = "http://"+this.subdomain+"."+location.hostname+"/stream.html?nocache="+t;
144	}
145	var f = this.pollmode.bind(this);
146	clearTimeout(this.pingtimer);
147	this.pingtimer = setTimeout(f, this.pingtimeout);
148
149	} else {
150	var ifr = document.createElement("IFRAME");
151	ifr.style.width = "10px";
152	ifr.style.height = "10px";
153	ifr.style.border = "none";
154	if (document.all) {
155	ifr.style.display = "none";
156	} else {
157	ifr.style.position = "absolute";
158	ifr.style.marginTop = "-10px";
159	ifr.style.zIndex = "-20";
160	}
161	ifr.id = "meteorframe_"+this.instID;
162	document.body.appendChild(ifr);
163	ifr.src = "http://"+this.subdomain+"."+location.hostname+"/poll.html?nocache="+t;
164	this.recvtimes[0] = t;
165	if (this.updatepollfreqtimer) clearTimeout(this.updatepollfreqtimer);
166	this.updatepollfreqtimer = setInterval(this.updatepollfreq.bind(this), 2500);
167	}
168	this.lastrequest = t;
169	}
170
171	Meteor.prototype.pollmode = function() {
172	this.mode="poll";
173	this.start();
174	this.callback_changemode("poll");
175	}
176
177	Meteor.prototype.process = function(id, data) {
178	if (id > this.lastmsgreceived) {
179	this.callback_process(data);
180	if (id != -1) this.lastmsgreceived = id;
181	if (this.mode=="poll") {
182	var now = new Date();
183	var t = now.getTime();
184	this.recvtimes[this.recvtimes.length] = t;
185	while (this.recvtimes.length > 5) this.recvtimes.shift();
186	}
187	} else if (id == -1) {
188	this.ping();
189	}
190	}
191
192	Meteor.prototype.ping = function() {
193	if (this.mode=="stream" && this.pingtimer) {
194	clearTimeout(this.pingtimer);
195	var f = this.pollmode.bind(this);
196	this.pingtimer = setTimeout(f, this.pingtimeout);
197	var now = new Date();
198	this.lastpingtime = now.getTime();
199	}
200	}
201
202	Meteor.prototype.reset = function() {
203	var now = new Date();
204	var t = now.getTime();
205	var x = this.pollfreq - (t-this.lastrequest);
206	if (x < 10) x = 10;
207	this.ping();
208	this.callback_reset();
209	setTimeout(this.start.bind(this), x);
210	}
211
212	Meteor.prototype.eof = function() {
213	this.callback_eof();
214	}
215
216	Meteor.prototype.get = function(varname) {
217	eval("var a = this."+varname+";");
218	if (typeof(a) == "undefined") throw "Cannot get value of "+varname;
219	return a;
220	}
221
222	Meteor.prototype.increasepolldelay = function() {
223	this.pollfreq *= 2;
224	}
225
226	Meteor.prototype.updatepollfreq = function() {
227	if (this.smartpoll) {
228	var now = new Date();
229	var t = now.getTime();
230	var avg = 0;
231	for (var i=1; i<this.recvtimes.length; i++) {
232	var x = (this.recvtimes[i]-this.recvtimes[i-1]);
233	avg += (x>60000)? 60000 : x;
234	}
235	x = (t-this.recvtimes[this.recvtimes.length-1]);
236	avg += (x>180000)? 180000 : x;
237	avg /= this.recvtimes.length;
238	if ((avg/3) < this.pollfreq && (avg/3) >= this.minpollfreq) this.pollfreq = Math.ceil(this.pollfreq*0.9);
239	if ((avg/3) > this.pollfreq) this.pollfreq = Math.floor(this.pollfreq*1.05);
240	}
241	}
242
243	Meteor.prototype.registerEventCallback = function(evt, funcRef) {
244	if (evt=="process") {
245	this.callback_process = (this.callback_process).andThen(funcRef);
246	} else if (evt=="reset") {
247	this.callback_reset = (this.callback_reset).andThen(funcRef);
248	} else if (evt=="eof") {
249	this.callback_eof = (this.callback_eof).andThen(funcRef);
250	} else if (evt=="changemode") {
251	this.callback_changemode = (this.callback_changemode).andThen(funcRef);
252	}
253	}
254
255
256	Meteor.createCookie = function(name,value,days) {
257	if (days) {
258	var date = new Date();
259	date.setTime(date.getTime()+(days2460601000));
260	var expires = "; expires="+date.toGMTString();
261	}
262	else var expires = "";
263	document.cookie = name+"="+value+expires+"; path=/";
264	}
265
266	Meteor.readCookie = function(name) {
267	var nameEQ = name + "=";
268	var ca = document.cookie.split(';');
269	for(var i=0;i < ca.length;i++) {
270	var c = ca[i];
271	while (c.charAt(0)==' ') c = c.substring(1,c.length);
272	if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
273	}
274	return null;
275	}
276
277	Meteor.eraseCookie = function(name) {
278	createCookie(name,"",-1);
279	}