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I agree with Jorge, HTTP defines PUT and POST in a way that allows each 
to be used for both create and update. We should not be changing the 
semantics of HTTP's uniform interface by adding additional constraints 
that are not documented in the HTTP spec.


On 09/19/2011 11:33 PM, Jorge Williams wrote:
>
>
> On 9/19/11 1:03 AM, "Mark McLoughlin"<markmc at redhat.com>  wrote:
>
>> The spec is actually quite clear on the different between PUT and POST:
>>
>>   "The fundamental difference between the POST and PUT requests is
>>    reflected in the different meaning of the Request-URI. The URI in a
>>    POST request identifies the resource that will handle the enclosed
>>    entity. That resource might be a data-accepting process, a gateway to
>>    some other protocol, or a separate entity that accepts annotations.
>>    In contrast, the URI in a PUT request identifies the entity enclosed
>>    with the request"
>
> Right.  Another important difference between PUT and POST in that PUT is
> idempotent -- see section 9.1.2.  In reality both PUT and POST can be used
> for create and update. Some further thoughts on this in
> http://etherpad.openstack.org/RFC-API-Guidelines
>
> -jOrGe W.
>
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