Re: Transport level compression

[christopher ferris <chris.ferris@east.sun.com>]

Arvola Chan wrote:
> 
> HTTP allows transport level compression through the use of the
> Content-Encoding entity-header. The permissible compression
> algorithms include gzip, compress, and deflate.
> 
> Should the use of transport level compression be specifiable in
> the CPA when the transport is HTTP?
> 
> Thanks,
> -Arvola
> 
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Arvola,

This is an interesting question. I would say that this is probably
a good idea. However, we shouldn't limit to Content-Encoding.
Seems to me that what a CPP/A should define (at least for HTTP)
is equivalent to the HTTP Accept* request headers that a client
uses for HTTP requests to inform the origin server what its
capabilities and/or preferences are.

It also seems to me that one could apply the Accept headers
abstractly to any transport protocol. Thus, something like:

<c:Transport transportId=".." xmlns:c="...">
	<c:SendingProtocol version="1.1">HTTP</c:SendingProtocol>
	<c:SendingProtocol version="1.1">SMTP</c:SendingProtocol>
	<c:ReceivingProtocol version="1.1">HTTP</c:ReceivingProtocol>
	<c:Accept c:mediaType="..."/> <!-- zero or more -->
	<c:AcceptEncoding c:contentCoding="..."/> <!-- zero or more -->
	<c:AcceptLanguage xml:lang="..."/> <!-- zero or more -->
	<c:AcceptCharset charset="..."/> <!-- zero or more -->
	...
</c:Transport>

Comments?

Chris