I am currently working on JavaScript code where I am trying to establish a connection with a remote asp.net page (aspx) using AJAX. My goal is to check this connection for a maximum of 2 minutes, with intervals of 10 seconds each. Here is the logic that I have in mind:
If flag=true if seconds < 120 setInterval("GetFeed()", 2000);
Can anyone please assist me with this?
Below is the snippet of my code for checking the connection:
var learnerUniqueID1;
var flag='true';
function fnCheckConnectivity(coursId)
{
var url = 'http://<%=System.Web.HttpContext.Current.Request.UrlReferrer.Host+System.Web.HttpContext.Current.Request.ApplicationPath%>/TestConn.aspx';
if (window.XMLHttpRequest) {
learnerUniqueID1 = new XMLHttpRequest();
}
else if (window.ActiveXObject) {
learnerUniqueID1 = new ActiveXObject("Microsoft.XMLHTTP");
}
else
{
alert("Your browser does not support XMLHTTP!");
}
learnerUniqueID1.open("POST", url, true);
learnerUniqueID1.onreadystatechange = callbackZone;
learnerUniqueID1.send(null);
}
function callbackZone()
{
if (learnerUniqueID1.readyState == 4)
{
if (learnerUniqueID1.status == 200)
{
parseMessageZone();
}
else
{
flag='false';
alert('We have detected a break in your web connection, \n please login again to continue with your session');
}
}
}
function parseMessageZone()
{
var result = learnerUniqueID1.responseText;
}
function makePayment(obj)
{
try
{
var Id = obj.attributes["rel"].value
var res=confirm('Want to Continue.');
if(res == true)
{
startRequest(Id);
}
else
{
return false;
}
}
catch(Error)
{
}
}
function startRequest(Id)
{
var milliseconds = 10000;
currentDate = new Date();
pollRequest(milliseconds, false, currentDate, 120000,Id);
}
function pollRequest(milliseconds, finshed, date, timeout,Id)
{
if((new Date()).getTime() > date.getTime()+timeout)
{
return;
}
if(!finished){
setTimeout(() => {
if(//check backend to see if finished) //which method will go here
{
fnCheckConnectivity(coursId);
pollRequest(milliseconds, true, date, timeout,Id);
}
else{
pollRequest(milliseconds, false, date, timeout,Id)
}
}, milliseconds);
return;
}
}