A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Patch and Fetch Methods for Constrained Application Protocol (CoAP)
Authors : Peter van der Stok
Carsten Bormann
Anuj Sehgal
Filename : draft-vanderstok-core-etch-00.txt
Pages : 16
Date : 2016-03-21
Abstract:
The existing Constrained Application Protocol (CoAP) methods only
allow access to a complete resource. This does not permit
applications to access parts of a resource. In case of resources
with larger or complex data, or in situations where a resource
continuity is required, replacing or requesting the whole resource is
undesirable. Several applications using CoAP will need to perform
partial resource accesses.
Similar to HTTP, the existing Constrained Application Protocol (CoAP)
GET method only allows the specification of a URI and request
parameters in CoAP options, not the transfer of a request payload
detailing the request. This leads to some applications to using POST
where actually a cacheable, idempotent, safe request is desired.
Again similar to HTTP, the existing Constrained Application Protocol
(CoAP) PUT method only allows to replace a complete resource. This
also leads applications to use POST where actually a cacheable,
possibly idempotent request is desired.
This specification adds new CoAP methods, FETCH, to perform the
equivalent of a GET with a request body; and the twin methods PATCH
and iPATCH, to modify parts of an existing CoAP resource.
The IETF datatracker status page for this draft is:
https://datatracker.ietf.org/doc/draft-vanderstok-core-etch/
There's also a htmlized version available at:
https://tools.ietf.org/html/draft-vanderstok-core-etch-00
Please note that it may take a couple of minutes from the time of submission
until the htmlized version and diff are available at tools.ietf.org.
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
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