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From Ovidiu Predescu <>
Subject Re: [C2] SOAP continued
Date Sat, 19 May 2001 06:18:48 GMT
Hi Michael,

Excellent, I think this is all great stuff! I hope I'll be able to
contribute more than just a few words of encouragement.

How do you plan to do the development? Do you have write access to the
CVS repository so we can track the progress and contribute code?

Ovidiu Predescu <> (inside HP's firewall only) (GNU, Emacs, other stuff)

On Wed, 16 May 2001 10:28:04 +0200, Michael Homeijer <> wrote:

> Based on responses on previous messages, I am going to try to build a SOAP
> client and server prototype in Cocoon 2 with the following principles:
> SOAP Client
> - Requests to a SOAP server can be performed from an XSP page
> - The SOAP envelope will be used to base a logic sheet upon. My motivation
> to not migrate the soap logic sheet developed for Cocoon 1 (By Ulrich
> Mayring) is that using the SOAP envelope syntax will standardize the soap
> call and will make the call less dependent on de logic sheet, creating a
> migration path when new tools for SOAP are available. Motivation not to use
> transformers with WSDL file as input (as proposed by Matthew Langham in a
> reply to one of my posts) is that the WSDL files describe what call can me
> made and not what calls a client can make (IMHO very important when complex
> services are called). Maybe the WSDL file can be used to validate the soap
> envelope or maybe tools can be found that create an editor for the soap
> envelope based on the wsdl file.
> - A call tag will be introduced to be able to send the soap envelope to a
> server and to specify where the content from response envelope should go
> (eg. to the xml output or to a variable).
> - Argument tags will be introduced to be able to pass java datatypes and
> have them translated to the appropriate soap calls.
> - The soap logic sheet will translate the envelope, the call tags and the
> argument tags to java code.
> SOAP server:
> - SOAP requests will be handled by a normal Cocoon pipeline.
> - The output of the pipeline will be a SOAP envelope.
> - A logic sheet can be built in the future to support translation from java
> datatypes to soap specific xml tags.
> - Something should be built to receive the SOAP request envelope and extract
> is so that for example the SOAP method specified in the request can be used
> in the sitemap to specify which XSP page should handle the request and
> produce the soap response as output. This part is not clear to me, Giacomo
> suggested using actions for this part, but I am looking for more detail. 
> Based on my understanding from Cocoon 2, this is what I should develop for
> the SOAP server:
> - A selector that takes the request envelope and makes it possible to select
> pipeline components based on the SOAP method specified in the request
> envelope.
> - An action that takes the request envelope and translates it into something
> that can be used in an XSP page to produce output
> I am not sure if this means parsing the request envelope multiple time (at
> least once in a selector and at least once in an action) or how these
> components should be called or configured in the sitemap. If anyone with
> some more knowledge of C2 / sitemap could translate this part into sitemap
> conventions, i'd be gratefull. It would give me something to start with.
> Thanks in advance for some feedback.
> Michael Homeijer

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