To make it clear:
My question is how server (SERVLET) knows if (web
browser) finish download 100% of the file.
If user had downloaded the whole file. user cannot
re-download the file again. If user click cancel in
the middle or didn't download 100% of a file -->
server will knows it and user can download it again.
Thanks.
--- eric leung <[EMAIL PROTECTED]> wrote:
> Hi,
> I have a servlet serves files for web browser.
>
> How can I know if the HTTP web browser had:
> 1) finished download 100% of the file, or;
> 2) only downloaded 50% of the file then click
> cancel,
> or;
> 3) only downloaded 70% then reboot the machine
>
> i think the TCP/IP layer (socket) will keep track of
> acknowlegament send back from client. but how do i
> implement this in my servlet? how do i (servlet)
> know
> how many bytes client had receive?
>
> I am now using apache + tomcat. I heard tomcat has
> problem getting acknowlegament from client. since
> tomcat is seperated by apache server from client
> (it's
> a tomcat bug also). Any one knows how to fix this
> problem?
> Web-browser --> apache --> tomcat
>
> thanks.
>
>
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