[Lispweb] encoding error on stream

[rm@fabula.de]

On Thu, May 12, 2005 at 04:06:24PM -0500, Alan Shields wrote:
> On Tue, May 10, 2005 at 02:56:16PM +0200, rm at fabula.de wrote:
> > On Mon, May 09, 2005 at 03:22:18PM -0500, Alan Shields wrote:
> > > Hey folks,
> > > 
> > > An issue has cropped up that I'm not quite sure how to deal with.
> > > 
> > > I'm trying to send a JPEG as a response in araneida. I've been doing
> > > this for a while. However, with SBCL 0.9.0, I started getting this
> > > error:
> > > 
> > > "encoding error on stream"
> > 
> > Welcome to the club ;-/
> 
> Looks like this might have been fixed in a recent patch.
> 
> 0.9.0.24
> Don't silently assume LATIN-1 for unknown / misspelled
> :external-format argument

I fear it's a bit more complicated - and IMHU unfortunately not realy a 
"bug" . In Common Lisp a stream has (one!) external format and an element
type. Now, when you open the socket with an :external-format of :utf-8 you
won't be able to send binary data (like images etc.) This is bad for an
HTTP/1.1 server where a connection can be used for both text and image data
without reopening. If opened with an element type of '(unsigned-byte 8) you 
can't really do (format stream .....) type of output ... Since HTTP makes
heavy use of MIME data can be in all sorts of external formats send over
the same (unsigned-byte 8) stream. 

> from the commit logs.
> 
> Until Debian updates, I think I'll keep running my app on my PPC
> laptop.

Lucky you. I had quite some fights on our production box :-/

 Cheers Ralf Mattes
> Alan
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