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How can a server file record when a web page rendered in Chrome was closed ?
- Thread starter peterpann
- Start date
Hi
I see you posted it in the AJAX forum, so you know the answer : send an [tt]XMLHttpRequest[/tt] call to notify the server.
That is thegood old portable way. But now there is the Beacon API's [tt]sendBeacon[/tt] Method, specially designed for this situation. Less portable for now ( see Can I use... beacon ), but more reliable.
Feherke.
feherke.ga
I see you posted it in the AJAX forum, so you know the answer : send an [tt]XMLHttpRequest[/tt] call to notify the server.
That is the
Feherke.
feherke.ga
- Thread starter
- #3
Feherke,
Thanks, but how is sendBeacon used ? I tried the following to store the time the page is unloaded but it didn't
seem to run the alert.php to change alert.txt.
<html>
<head>
<title>alert.htm</title>
</head>
<body>
alert.htm
<script type="text/javascript">
window.addEventListener('unload', logData(), false);
function logData()
{
navigator.sendBeacon("alert.php", nowhhmm() );
}
function nowhhmm() //with leading zero
{
var now = new Date();
var hournow = now.getHours();
var minutenow = now.getMinutes();
var hhmm = hournow*100 + minutenow;
hhmm = ("0" + hhmm).slice(-4);
return hhmm;
}
</script>
</body>
</html>
<?php
//alert.php
$data = $HTTP_RAW_POST_DATA;
$file = 'alert.txt';// Open the file to get existing content
$prev = file_get_contents($file);
$total = $data . $prev . "\n";
file_put_contents($file, $total);
////fclose($file); //not needed ?
exit();
?>
Merry Christmas.
Thanks, but how is sendBeacon used ? I tried the following to store the time the page is unloaded but it didn't
seem to run the alert.php to change alert.txt.
<html>
<head>
<title>alert.htm</title>
</head>
<body>
alert.htm
<script type="text/javascript">
window.addEventListener('unload', logData(), false);
function logData()
{
navigator.sendBeacon("alert.php", nowhhmm() );
}
function nowhhmm() //with leading zero
{
var now = new Date();
var hournow = now.getHours();
var minutenow = now.getMinutes();
var hhmm = hournow*100 + minutenow;
hhmm = ("0" + hhmm).slice(-4);
return hhmm;
}
</script>
</body>
</html>
<?php
//alert.php
$data = $HTTP_RAW_POST_DATA;
$file = 'alert.txt';// Open the file to get existing content
$prev = file_get_contents($file);
$total = $data . $prev . "\n";
file_put_contents($file, $total);
////fclose($file); //not needed ?
exit();
?>
Merry Christmas.
Hi
It works for me in FireFox 50.1.0, just the beacon is sent in wrong moment, because you call logData() when setting up the event handler - you should reference it instead :
Regarding your PHP code, do you realize you always put the newline at the end of file, not between previous and new data ? ( Also no idea why you need the times logged in reverse order. ) Anyway, first of all, please check whether the web server's user has permission to write in that directory. Check your web server's error log, probably you will find something like this :
Feherke.
feherke.ga
It works for me in FireFox 50.1.0, just the beacon is sent in wrong moment, because you call logData() when setting up the event handler - you should reference it instead :
Code:
window[teal].[/teal][COLOR=orange]addEventListener[/color][teal]([/teal][i][green]'unload'[/green][/i][teal],[/teal] logData[teal],[/teal] [b]false[/b][teal]);[/teal]
[gray]// no () here --^[/gray]Regarding your PHP code, do you realize you always put the newline at the end of file, not between previous and new data ? ( Also no idea why you need the times logged in reverse order. ) Anyway, first of all, please check whether the web server's user has permission to write in that directory. Check your web server's error log, probably you will find something like this :
/var/log/apache2/error.log said:
Certainly not. $file is a string. You can't close a string.peterpann said:
Feherke.
feherke.ga
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