m.e at acm
May 12, 2008, 2:05 AM
Post #6 of 6
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Re: UTF-16 surrogate message when writing binary data (image)
[In reply to]
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The error is specifically at /usr/lib/perl/5.8/IO/Handle.pm line 199, which
is the second syswrite call in
sub syswrite {
@_ >= 2 && @_ <= 4 or croak 'usage: $io->syswrite(BUF [, LEN [,
OFFSET]])';
if (defined($_[2])) {
syswrite($_[0], $_[1], $_[2], $_[3] || 0);
} else {
syswrite($_[0], $_[1]);
}
}
The error is in production, so I am adding some trace code to investigate
further, but results will need to wait until I have pushed the code.
2008/5/10 Matt S Trout <dbix-class[at]trout.me.uk>:
> On Fri, May 09, 2008 at 02:58:41PM +0800, Martin Ellison wrote:
> > If I write binary data (a JPEG) using $c->res->body then I get all these
> > errors
> >
> > stderr: UTF-16 surrogate 0xdf98 at /usr/lib/perl/5.8/IO/Handle.pm line
> 199.
> >
> > My code looks like
> >
> > $c->res->content_type(q{image/jpeg});
> > $c->res->header( 'Content-Disposition', q{inline} );
> > $c->res->body($pic_image);
> >
> > Presumably, something is assuming that the output is Unicode text and
> trying
> > to interpret it accordingly. These error messages are all over the log,
> > making it difficult to read, besides any impact the situation may be
> having
> > on the output.
> >
> > Is there any way to fix this issue (eg something like binmode)?
>
> My best guess here is that $pic_image is, or looks like, a file handle,
> and so when Catalyst is sending the response it's doing so by reading
> from the filehandle and the error's turning up during $fh->read.
>
> It'd of course be easier for you to confirm this, since you have the
> copy of IO/Handle.pm and the line number - maybe you could look?
>
> A good way to check would be to loop reading $pic_image yourself and
> see if you get the same warning ...
>
> --
> Matt S Trout Need help with your Catalyst or DBIx::Class
> project?
> Technical Director
> http://www.shadowcat.co.uk/catalyst/
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>
> _______________________________________________
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>
--
Regards,
Martin
(m.e[at]acm.org)
IT: http://methodsupport.com Personal: http://thereisnoend.org
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