RE: [Bug 8301] New: generating the PutDenied fault

Hi Dave,

After some discussion, the WG resolved this issue with comment #3: http://www.w3.org/Bugs/Public/show_bug.cgi?id=8301.

I agree that it would be useful to clarify situations when an implementation may ignore read-only data.

Thanks.

From: David Snelling [mailto:David.Snelling@UK.Fujitsu.com]
Sent: Monday, January 25, 2010 6:01 PM
To: Ram Jeyaraman
Cc: Doug Davis; public-ws-resource-access@w3.org
Subject: Re: [Bug 8301] New: generating the PutDenied fault

Ram,

The approach in [2] seems right, but let get this clear:

 - The service implementation ignores attempted changes to "read-only" values, i.e. never faults.

- The service implementation MUST fault is it is not happy with a "read-write" value.

If the above is correct, the text in [2] is not quite there.


On 19 Jan 2010, at 12:24, Ram Jeyaraman wrote:


Yes, the existing text [1] should be clarified to identify situations in which the service might ignore the supplied elements/attribute values or generate a fault.

How about [2]?

Thanks.

[1] Current text

Replace from:

The replacement representation could contain within it element or attribute values that are different than their corresponding values in the current representation. Such changes could affect elements or attributes that, for whatever reason, the implementation does wish to allow the client to change. An implementation MAY choose to ignore such elements or attributes, or it MAY generate a wst:PutDenied fault. See 5 Faults<http://www.w3.org/2002/ws/ra/edcopies/wst.html#Faults>.

[2] Proposed text

The replacement representation could contain within it element or attribute values that are different than their corresponding values in the current representation. Such changes could affect read-only elements and attributes, and read-write elements and attributes that the implementation does not wish to allow the client to change. If an implementation detects changes it does not allow, in the elements or attributes in the presented representation, it MUST generate a wst:PutDenied fault (See 5 Faults<http://www.w3.org/2002/ws/ra/snapshots/20091117/wst.html#Faults>). If a replacement representation contains read-only elements or attribute values that adhere to the schema of the resource, an implementation MUST ignore such read-only elements or attribute values.

From: public-ws-resource-access-request@w3.org<mailto:public-ws-resource-access-request@w3.org> [mailto:public-ws-resource-access-request@w3.org] On Behalf Of Doug Davis
Sent: Wednesday, January 06, 2010 8:52 AM
To: public-ws-resource-access@w3.org<mailto:public-ws-resource-access@w3.org>
Subject: RE: [Bug 8301] New: generating the PutDenied fault


hmm, when I read that paragraph I interpret it to say "a service is free to ignore anything the client sends in and not tell the client it ignored it".  Anyone else read it that way too?  I understand that perhaps the original purpose of this is to allow for the service to ignore read-only data that the client may have sent, but if so then it seems we should call out those type of cases.  The current wording (e.g "for whatever reason") seems to allow a service to totally lie by ignoring all of the passed in data.

thanks
-Doug
______________________________________________________
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Ram Jeyaraman <Ram.Jeyaraman@microsoft.com<mailto:Ram.Jeyaraman@microsoft.com>>
Sent by: public-ws-resource-access-request@w3.org<mailto:public-ws-resource-access-request@w3.org>

01/06/2010 11:42 AM

To

"public-ws-resource-access@w3.org<mailto:public-ws-resource-access@w3.org>" <public-ws-resource-access@w3.org<mailto:public-ws-resource-access@w3.org>>

cc

Subject

RE: [Bug 8301] New: generating the PutDenied fault







+1

-----Original Message-----
From: public-ws-resource-access-notifications-request@w3.org<mailto:public-ws-resource-access-notifications-request@w3.org> [mailto:public-ws-resource-access-notifications-request@w3.org] On Behalf Of bugzilla@wiggum.w3.org<mailto:bugzilla@wiggum.w3.org>
Sent: Friday, November 13, 2009 7:24 PM
To: public-ws-resource-access-notifications@w3.org<mailto:public-ws-resource-access-notifications@w3.org>
Subject: [Bug 8301] New: generating the PutDenied fault

http://www.w3.org/Bugs/Public/show_bug.cgi?id=8301

          Summary: generating the PutDenied fault
          Product: WS-Resource Access
          Version: PR
         Platform: All
       OS/Version: All
           Status: NEW
         Severity: normal
         Priority: P2
        Component: Transfer
       AssignedTo: public-ws-resource-access-notifications@w3.org<mailto:public-ws-resource-access-notifications@w3.org>
       ReportedBy: gilbert.pilz@oracle.com<mailto:gilbert.pilz@oracle.com>
        QAContact: public-ws-resource-access-notifications@w3.org<mailto:public-ws-resource-access-notifications@w3.org>


Section 3.2 "Put" contains the following paragraph:

"The replacement representation could contain within it element or attribute values that are different than their corresponding values in the current representation. Such changes could affect elements or attributes that, for whatever reason, the implementation does wish to allow the client to change. An implementation MAY choose to ignore such elements or attributes, or it MAY generate a wst:PutDenied fault. See 5 Faults."

Since the term "generate" is defined as "MUST perform some internal logging and MAY transmit a fault", "MAY generate" is a contradictory clause.

Proposal: "The replacement representation could contain within it element or attribute values that are different than their corresponding values in the current representation. Such changes could affect elements or attributes that, for whatever reason, the implementation does wish to allow the client to change. An implementation MAY choose to ignore such elements or attributes. If an implementation does not ignore these elements or attributes, it MUST generate a wst:PutDenied fault. See 5 Faults."


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Take care:

    Dr. David Snelling < David . Snelling . UK . Fujitsu . com >
    Fujitsu Laboratories of Europe Limited
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