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PATCH and FETCH Methods for the Constrained Application Protocol (CoAP) (RFC8132) Disclosure Number: IPCOM000249806D
Original Publication Date: 2017-Apr-01
Included in the Prior Art Database: 2017-Apr-07
Document File: 42 page(s) / 43K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

P. van der Stok: AUTHOR [+3]


Similar to HTTP, the GET method defined in [RFC7252] for the Constrained Application Protocol (CoAP) 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 some applications to use POST where a cacheable, idempotent, safe request is actually desired.

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Internet Engineering Task Force (IETF)                   P. van der Stok Request for Comments: 8132                                    Consultant Category: Standards Track                                     C. Bormann ISSN: 2070-1721                                  Universitaet Bremen TZI                                                                A. Sehgal                                                             NAVOMI, Inc.                                                               April 2017

 PATCH and FETCH Methods for the Constrained Application Protocol (CoAP)


   The methods defined in RFC 7252 for the Constrained Application    Protocol (CoAP) only allow access to a complete resource, not to    parts of a resource.  In case of resources with larger or complex    data, or in situations where resource continuity is required,    replacing or requesting the whole resource is undesirable.  Several    applications using CoAP need to access parts of the resources.

   This specification defines the new CoAP methods, FETCH, PATCH, and    iPATCH, which are used to access and update parts of a resource.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force    (IETF).  It represents the consensus of the IETF community.  It has    received public review and has been approved for publication by the    Internet Engineering Steering Group (IESG).  Further information on    Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,    and how to provide feedback on it may be obtained at

van der Stok, et al.         Standards Track                    [Page 1]
 RFC 8132                    CoAP FETCH PATCH                  April 2017

 Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the    document authors.  All rights reserved.

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