[Zope] ZServer streaming output

[Toby Dickenson]

I've been comparing the streaming output of ZServer and ZopeHTTPServer
, and come across two disadvantages related to the way ZServer buffers
writes in memory. Firstly if the output is created faster than the
client can consume it then the Zope process grows to accomodate the
buffer. If the streamed output is large then this may not be
appropriate. Secondly, there seems to be no convenient way to abort
the method if the client disconnects part way through receiving the
streamed output. With ZopeHTTPServer in this situation, RESPONSE.write
would raise an exception.

Is there anyway to recover some of the old behaviour under ZServer?