GPS Security
GPS Security
(OP)
Hi,
I am trying to add some security to a web app I am writing which will mean if you try and run it more than 100m from a certain location it will redirect to a page gpsfail.asp otherwise it will go to loginform.asp
If you are not logged in it redirects to a page that has this code:
In my distancetooffice.asp I have loads of code that has various functions for calculating distances between points etc. but the main thing is I can make the response text be a number.
I want to have as much of my logic hidden from the user as possible - so should I make the response text be the page I want to go to and then on my client side code have something like
Thanks very much
Ed
I am trying to add some security to a web app I am writing which will mean if you try and run it more than 100m from a certain location it will redirect to a page gpsfail.asp otherwise it will go to loginform.asp
If you are not logged in it redirects to a page that has this code:
CODE
<body onload="distanceToOffice();">
CODE
In my .js file I have the following:
function distanceToOffice()
{
navigator.geolocation.getCurrentPosition(handle_geolocation_query);
}
function handle_geolocation_query(position)
{
//alert('Lat: ' + position.coords.latitude + ' ' +
// 'Lon: ' + position.coords.longitude);
xmlhttpDistanceToOffice=GetXmlHttpObject();
if (xmlhttpDistanceToOffice==null)
{
alert ("Your browser does not support XMLHTTP!");
return;
}
url="/admin/distancetooffice.asp?lat1="+position.coords.latitude+"&lon1="+position.coords.longitude;
url=url+"&sid="+Math.random();
xmlhttpDistanceToOffice.onreadystatechange=function(){if (xmlhttpDistanceToOffice.readyState==4){var aspResponse = xmlhttpDistanceToOffice.responseText;document.getElementById('distanceToOfficeDiv').innerHTML = aspResponse;}}
xmlhttpDistanceToOffice.open("GET",url,true);
xmlhttpDistanceToOffice.send(null);
} In my distancetooffice.asp I have loads of code that has various functions for calculating distances between points etc. but the main thing is I can make the response text be a number.
I want to have as much of my logic hidden from the user as possible - so should I make the response text be the page I want to go to and then on my client side code have something like
CODE
window.location=aspResponse;
Thanks very much
Ed
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