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From "Ryan Bloom" <...@covalent.net>
Subject RE: How to achieve zero-copy when reading request headers?
Date Sat, 29 Jun 2002 01:43:20 GMT

> > stack in ap_read_request() (and remove once we've parsed the
> > request header): let this filter do the scanning for the various
> > forms of HTTP header, remove the header from the brigade, and
> > leave the rest of the brigade for subsequent input filters to
> > handle.
> 
> It'd have to be a connection-level filter to ensure that we don't
> lose pipelined-requests since we read too much.  But, since we are
> a connection-level filter, that means you don't have access to
> the request.  So, you'd have to split it out into two filters:
> 
> - One connection-level filter that will split on a CRLFCRLF and
> stash the rest away for the next read on this connection.
> - One request-level filter that will expect a CRLFCRLF-segmented
> brigade and process the headers and then get out of the way.

Connection level filters do have access to the request.  I don't
understand why you don't think they do.

Ryan


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