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List:       cgi-list
Subject:    Re: SV: [CGI] Script timing out
From:       "Lily Y. Fu" <lily () tigr ! org>
Date:       1998-12-30 17:23:20
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Hi Robert,


I'd appreciate you posting an example on handling the timeout issue 
using fork, alarm() and $SIG{ALRM} as you mentioned.

Thanks,

Lily


> > Robert,
> > 
> > Thank you very much for your quick response. After adding this line to my
> > script (close to the top of the script):
> > 
> > $| = 1;
> > 
> > ...it is still doing the same thing:
> > 
> >     foreach $url (@urllist) {
> >          chomp ($url);
> >          print "<STRONG><A HREF=\"$url\"
> > TARGET=\"_new\">$url</A></STRONG><BR> \n";
> >          &submit_urls;   # <<< this is the submitter routine, slows it
> down
> > a lot
> >          print "<BR><P> \n";
> >     }
> >     print "<BR><P><STRONG>", scalar(@urllist), " URL(s)
> submitted.</STRONG>
> > <BR><P> \n";
> >     print "</BLOCKQUOTE></BLOCKQUOTE> \n";
> >     print "</BODY></HTML> \n";
> > 
> > 
> > I would expect it to print one line, pause, print another, etc., but it
> > timeouts after 60 seconds. Sorry to be a bother, but what am I doing
> wrong?
> 
>   Probably nothing. $| tells perl to flush after every print/write but what
>   happens after that is beyond the scope of your script.
> 
>   A better solution would be to use fork and run &submit_urls() as a 
>   child process. fork isn't supported on NT, but there's a module for
>   that. I think it's called Win32::Spawn.pm but I'm not sure.
> 
>   You might also want to define a maximum time for &submit_urls()
>   to complete and report a timeout to the client on failure.
>   Use alarm() and $SIG{ALRM} for that. If you (or anyone) want an 
>   example just ask and I'll post one.
> 
> hth,
> Robban
>  ~v~^~v~^~v~^~v~^~v~^~v~^~v~^~v~^~v~^~v~^~v~
> >
> >   Robert Friberg
> >   Delphi, C, Perl Developer
> >   0708 - 98 57 01
> >
>  ~v~^~v~^~v~^~v~^~v~^~v~^~v~^~v~^~v~^~v~^~v~
> 
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