Re: [Chicken-users] with-input-from-request does not close SSL socket

[Peter Bex]

On Fri, Dec 16, 2011 at 11:39:56AM +0100, address@hidden wrote:
> 2011/12/15 Peter Bex <address@hidden>:
> I would say the GC must close the connection. How will you ever be
> able to close the socket in this case:
> 
> (use tcp)
> (let ((p (tcp-connect "localhost" 25)))
>   (if #f #f))
> 
> All references are lost. But the socket is still open.
> 
> But you are right. It is the same for file handles. This will also
> leak resources:
> 
> (let ((p (open-input-file "/bin/bash")))
>   (if #f #f))
> 
> And Bigloo, Gambit and Guile do not close them either.
> 
> But this sounds somehow broken to me. File descriptors are a resource
> like memory. It is a bit strange that memory gets collected but file
> descriptors not. Is there a reason for this?

This could be done, but adding finalizers to them would cause quite a
performance hit, and it wouldn't *really* fix anything.  It would just
sweep the problem deeper under the rug.  For example, if you open a
lot of files in a program that doesn't do any (or much) allocating, the
GC wouldn't be triggered and you would start getting "out of
filedescriptors" errors.

> > Have you checked that there's no trailing data?
> 
> I think the kernel function close does not care about any data not
> read when closing a socket. Is this different in Chicken?

Not sure.  Just try it, if it helps we can think about why it helps.

> > If you are still having trouble, please post a full example including
> > the URI that's doing this.  I can't reproduce this with for example
> 
> I can not post the URI because it is an internal service of the
> company I am working for. But I was able to solve the problem with the
> function I have posted. So it is ok for me.

Can you reproduce it on another service?

Cheers,
Peter
-- 
http://sjamaan.ath.cx
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