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Re: [APPS-REVIEW] Review of HTTP Binding for DSKPP

I expect HTTP bindings to address the concerns raised in BCP 56. Unless the primary client for your protocol is a web browser, I would strongly encourage registering a separate port. In the SMTP world, the primary source of interoperability problems is application-level gateways/firewalls. At this point it's inevitable we'll end up with intrusive firewalls on port 80 that will break anything beyond stock browser-based HTTP. I encourage new HTTP-based protocols to register a separate port so they have the opportunity to avoid such damage and interoperability problems. It also simplifies responsible firewall operation by enabling port-based service restrictions that are more scalable and less intrusive.

I have yet to see any evidence that WSDL is useful in practice but that may be due to my lack of experience with web services.

I find Relax NG and/or XML schema useful for XML-based protocols/formats whether or not they are built on top of HTTP. My understanding is that Relax NG is better for extensible entity-based XML formats, whereas XML Schema is better for XML formats with strong value typing.

I haven't reviewed the DSKPP draft yet.

               - Chris

Hannes Tschofenig wrote on 9/13/07 14:56 +0200:

Hi all,

I would like to solicit feedback regarding the HTTP binding described in
DSKPP:
http://www.ietf.org/internet-drafts/draft-ietf-keyprov-dskpp-00.txt

I went through a couple of documents that describe an HTTP binding and
noticed all of them are slightly different. If you, for example, take a look
at another recent work, namely HELD, from the GEOPRIV working group then you
will notice that the author incorporated a WSDL binding. The draft is here:
http://www.ietf.org/internet-drafts/draft-ietf-geopriv-http-location-delivery
-01.txt

Do people on this list have an opinion about the content they would like to
see in these type of documents?
What is the opinion regarding the usage of WSDL?

Ciao
Hannes




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