odata message

Subject: [OASIS Issue Tracker] Created: (ODATA-291) Consider adding a mechanism for idempotence with POST

From: OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>
To: odata@lists.oasis-open.org
Date: Tue, 12 Mar 2013 15:28:50 -0400 (EDT)

Consider adding a mechanism for idempotence with POST
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                 Key: ODATA-291
                 URL: http://tools.oasis-open.org/issues/browse/ODATA-291
             Project: OASIS Open Data Protocol (OData) TC
          Issue Type: New Feature
          Components: OData Protocol 
    Affects Versions: V4.0_WD01
            Reporter: Evan Ireland


Many backend systems will generate a key in response to a newly POSTed entity.

If a client sends a POST request to create an entity, and the OData service does create the entity, but the HTTP response to the client is lost, the client may be unsure as to whether or not the request succeeded. If the client repeats the request, it may result in duplicate information in the backend system.

Idempotence is especially important for clients which want to be able to do store-and-forward (e.g. offline enablement).


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