[Catalyst] Detecting if a user aborted a (long) download

[Jeff Chimene]

Jonathan Rockway wrote:
> On Sunday 11 March 2007 20:59, Jeff Chimene wrote:
>   
>> How does that differ from something that compares bytes sent to bytes
>> received? Assuming that the OP defines success when "bytes received =
>> bytes sent"
>>     
>
> How do you determine how many bytes were received and successfully written to 
> disk?

There's also this:
> http://ajaxpatterns.org/Progress_Indicator#What_sort_of_progress_indicator_will_you_use.3F