I think you want $bytes_out >= $size, actually...
I'm not sure what you are sending out for that last extra byte... :-)
You could consider just timing out any zombies.
You could use "ignore_user_abort" and hope to "finish" most of the
downloads, as far as PHP is concerned, but I don't think
ignore_user_abort is 100% guaranteed, and there's always the chance of
a PHP or Apache connection crashing...
You could also re-think the problem to check, say, load on the server,
or some sort of bandwidth meter that you could manage, rather than N
slots.
So somebody on a dog-slow dialup downloading would not "count" as much
as somebody sucking down your entire bandwidth on a T-1.
By shaping it by the bytes/sec being spewed out by PHP, zombie
connections will naturally stop updating the meter, so won't count.
On Sun, December 31, 2006 9:12 am, Aras wrote:
> First of all, Happy New Year for everyone in the list. I wish 2007
> brings
> all us happiness, health and peace.
>
> I want to read your advises at a point i am stuck within, i have an
> application that serves downloads to clients. For some reason i am
> limiting
> total open slot for some group of users (not related to my technical
> question).
>
> Example;
>
> // CHECKS SLOT HERE
>
> else { // IF THERE ANY AVAILABLE SLOTS SEND THE FILE
>
> // INCREMENT SLOT NUMBER BY 1
>
> $fp = fopen($pathside,"r");
>
> if ($fp) {
>
> while (!feof($fp)) {
> echo fread($fp, 334);
>
> $bytes_out += 334;
> ob_flush();
>
> if ($bytes_out > $size) {
>
> // DECREASE SLOT NUMBER BY 1, BECAUSE THIS DOWNLOAD IS FINISHED
>
> }
>
> }
>
> }
>
> }
>
>
> Slots are recorded and checked from a simple mysql table. Everything
> works
> in this scenario. There is no problem if a person starts a download
> and
> finishes it, his slots get empty upon doing so. Yet if he cancelles
> the
> transfer, he will never reach my control structure to empty the slot.
> And
> slots will be full of zombies.
>
> I have thought of updating a mysql field for alive-connections in the
> while
> loop, but it will definitely add some load on my server. Updating a
> system
> file is not secure and good way.
>
> What other ways can you recommend to me for the situtation?
>
>
> Aras Koktas
> manager@xxxxxxxxxx
> Business Excellence Development
> Phi.dot Internet Systems
>
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>
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