silverstripe-framework/admin/javascript/LeftAndMain.Ping.js

50 lines
1.4 KiB
JavaScript

/**
* File: LeftAndMain.Ping.js
*/
(function($) {
$.entwine('ss.ping', function($){
$('.cms-container').entwine(/** @lends ss.Form_EditForm */{
/**
* Variable: PingIntervalSeconds
* (Number) Interval in which /Security/ping will be checked for a valid login session.
*/
PingIntervalSeconds: 5*60,
onadd: function() {
this._setupPinging();
this._super();
},
/**
* Function: _setupPinging
*
* This function is called by prototype when it receives notification that the user was logged out.
* It uses /Security/ping for this purpose, which should return '1' if a valid user session exists.
* It redirects back to the login form if the URL is either unreachable, or returns '0'.
*/
_setupPinging: function() {
var onSessionLost = function(xmlhttp, status) {
if(xmlhttp.status > 400 || xmlhttp.responseText == 0) {
// TODO will pile up additional alerts when left unattended
if(window.open('Security/login')) {
alert('Please log in and then try again');
} else {
alert('Please enable pop-ups for this site');
}
}
};
// setup pinging for login expiry
setInterval(function() {
$.ajax({
url: 'admin/security/ping',
global: false,
complete: onSessionLost
});
}, this.getPingIntervalSeconds() * 1000);
}
});
});
}(jQuery));