Hi all,
This is my code for detect network status , it maybe help to
you.
Thanks Dimitri Glazkov (
http://code.google.com/p/glazkov-attic/source/browse/trunk/YourTimesheets/Scripts/monitor.js)
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/**
* The ParentWorkerPool of Monitor whether the system is online or
offline
*
* Alex([email protected])
* 2009.3
*/
isOnlie: function(){
workerPool = google.gears.factory.create('beta.workerpool');
workerPool.onmessage = function(a, b, message) {
if (message.sender == monitorchildWorkerId) {
if(message.text == 'online'){
$('#is-connected').show();
$('#is-disconnected').hide();
}else if(message.text == 'offline'){
$('#is-disconnected').show();
$('#is-connected').hide();
}
}
};
var monitorchildWorkerId = workerPool.createWorkerFromUrl('/
javascripts/js_app/models/monitor.js');
workerPool.sendMessage(window.location + '?monitor',
monitorchildWorkerId);
}
/**
* The ChinldWorkerPool of Monitor whether the system is online or
offline
*
* Alex([email protected])
* 2009.3
*/
var POLLING_INTERVAL = 2000;
var wp = google.gears.workerPool;
var url;
var parentId;
var first = true;
var online;
var request = google.gears.factory.create('beta.httprequest', '1.0');
var timer = google.gears.factory.create('beta.timer');
var wp = google.gears.workerPool;
monitor = function (message) {
var count = 0;
var db = google.gears.factory.create('beta.database');
db.open('red-CustomersManagement');
request.open('HEAD', url + String(Math.floor(Math.random()*10000)));
request.onreadystatechange = function() {
if (request.readyState == 4) {
try {
if (request.status == 200) {
rs = db.execute("select * from isonline",[]);
if(rs.isValidRow()){count = rs.field(0)};
if (!online) {
online = true;
if (count == 0){
db.execute("insert into isonline (state) values (?)",
['online']);
}else{
db.execute('update isonline set state=? where
state=?;', ['online',"offline"]);
}
rs.close();
wp.sendMessage("online", parentId);
}
}
}
catch(e) {
if (online || first) {
online = false;
first = false;
db.execute('update isonline set state=? where state=?;',
['offline',"online"]);
wp.sendMessage("offline", parentId);
}
}
db.close();
// wp.sendMessage('ddd', parentId);
timer.setTimeout(monitor, POLLING_INTERVAL);
}
}
try {
request.send();
}
catch(e) {
if (online) {
online = false;
var db = google.gears.factory.create('beta.database');
db.open('red-CustomersManagement');
db.execute('update isonline set state=? where state=?;',
['offline',"online"]);
db.close();
wp.sendMessage("offline", parentId);
}
}
}
wp.onmessage = function(a, b, message) {
url = message.text;
parentId = message.sender;
monitor(message)
}
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thank you!
Alex
