Checking if browser is still connected?

[redgenie]

Hi everyone,

I have a CGI script which performs a fair bit of work and I want to stop it running if the user closes their browser or hits back etc.

It's pretty easy in asp, as I could use Response.isClientConnected

Take a look at the following code:

print "Content-Type: text/html\n\n"; 

	while ($recordExists) { 

	# HERE I WOULD LIKE TO CHECK IF THE CLIENT IS CONNECTED OTHERWISE TERMINATE SCRIPT 

	my $recordData=getRecordData(); 
	print "Data: ${recordData}<br>"; 

	$recordExists=isThereAnother(); 
} 

print "Done!"; 

exit;

Is it possible? Any help would be greatly appreciated....

 

[siberian]

Not that I know of. I would image that the 'isClientConnected' code is maybe an ASP->Internet Explorer thing, there's nothing in the RFC to handle this.

 

[redgenie]

I have actually found a way to do this but there is a downside. It only works with PerlScript so I think is only available to Win32 users unfortunately.


The code below works fine:

<% @LANGUAGE="PerlScript" %>
<%
	require 'loggingLibrary.pl';

	for(my $i=0;$i<100;$i++) {
		if ($Response->{IsClientConnected}) {
			# Do whatever
		} else {
			writeToLog("Script terminated at step: $i");
			exit;
		}
	}
%>

Depending on how fast the loop executes you may want to "mod" the isClientConnected test so it doesn't test on every pass.