[Zope] Serve large files efficiently from a pipe

[Dieter Maurer]

Roman Suzi wrote at 2005-11-8 13:05 +0200:
> ...
>What about serving large files given file(-like) handler? It could be
>very beneficial sometimes, especially with dynamically generated
>content...

You must observe the restrictions required by HTTP!


HTTP 1.1 requires that if a response contains a "Content-Length"
header, then it *MUST* correctly specify the size of the response
entity. If it does not contain a "Content-Length", then
its end *MUST* be indicated by closing the connection.

Zope is a bit buggy in this respect. It always adds a
"Content-Length" header, if the application did not do so.
Of course, this automatically added header has (almost surely)
the wrong value for dynamically created content.

Currently, Zope does not support the "no Content-Length; response end
by connection close" possibility.

-- 
Dieter