Re: Update resource - GET required to preceed the PUT?

[Julian Reschke <julian.reschke@xxxxxx>]

Davis_Cornelia@xxxxxxx wrote:
> The subject line really says it all.  To be a compliant AtomPub client, 
> when editing a resource must the client do a GET before doing a PUT?

No.

> The way I understand it, use of etags or modify dates as a part of the 
> exchange is not required (resulting in potential overwrite problems).

Yes.

> Yet if a server did require that, say, eTags be used then PUT requests 
> lacking the eTag could result in an error code (not sure which) which 
> could be interpreted to mean, “do a GET and use the eTag to retry your 
> PUT”.

Correct.

Of course the interesting issue here is which status code would be right 
(403? 409? generic 400?), and whether it's necessary to standardize it.

BR, Julian