clog/tutorial/13-tutorial/hello-clog/www/js/boot.js

var ws;
var adr;
var params={};
var clog={};
var pingerid;

if (typeof clog_debug == 'undefined') {
    clog_debug = false;
}

function Ping_ws() {
    if (ws.readyState == 1) {
        ws.send ("0");
    }
}

function Shutdown_ws(event) {
    if (ws != null) {
	ws.onerror = null;
	ws.onclose = null;
	ws.close ();
	ws = null;
    }
    clearInterval (pingerid);
    if (clog['html_on_close'] != "") {
        $(document.body).html(clog['html_on_close']);
    }
}

function Setup_ws() {
    ws.onmessage = function (event) {
        try {
            if (clog_debug == true) {
		console.log ("eval data = " + event.data);
            }
            eval (event.data);
        } catch (e) {
            console.error (e.message);
        }
    }
    
    ws.onerror = function (event) {
        console.log ("onerror: reconnect");
        ws = null;
        ws = new WebSocket (adr  + "?" + clog['connection_id']);
        ws.onopen = function (event) {
            console.log ("onerror: reconnect successful");
            Setup_ws();
        }
        ws.onclose = function (event) {
            console.log ("onerror: reconnect failure");
            Shutdown_ws(event);
        }
    }
    
    ws.onclose = function (event) {
        console.log ("onclose: reconnect");
        ws = null;
        ws = new WebSocket (adr  + "?" + clog['connection_id']);
        ws.onopen = function (event) {
            console.log ("onclose: reconnect successful");
            Setup_ws();
        }
        ws.onclose = function (event) {
            console.log ("onclose: reconnect failure");
            Shutdown_ws(event);
        }
    }
}

$( document ).ready(function() {
    var s = document.location.search;
    var tokens;
    var r = /[?&]?([^=]+)=([^&]*)/g;

    clog['body']=document.body;
    clog['head']=document.head;
    clog['documentElement']=document.documentElement;
    clog['window']=window;
    clog['navigator']=navigator;
    clog['document']=window.document;
    clog['location']=window.location;
    
    s = s.split("+").join(" ");
    
    while (tokens = r.exec(s)) {
        params[decodeURIComponent(tokens[1])] = decodeURIComponent(tokens[2]);
    }
    
    if (location.protocol == "https:") {
        adr = "wss://" + location.hostname;
    } else {
        adr = "ws://" + location.hostname;
    }
    
    if (location.port != "") { adr = adr + ":" + location.port; }
    adr = adr + "/clog";
    
    try {
        console.log ("connecting to " + adr);
        ws = new WebSocket (adr);
    } catch (e) {
        console.log ("trying again, connecting to " + adr);
        ws = new WebSocket (adr);
    }
    
    if (ws != null) {
        ws.onopen = function (event) {
            console.log ("connection successful");
            Setup_ws();
        }
        pingerid = setInterval (function () {Ping_ws ();}, 10000);
    } else {
        document.writeln ("If you are seeing this your browser or your connection to the internet is blocking websockets.");
    }
});