CalDAV Managed Attachments
draft-ietf-calext-caldav-attachments-02

Document Type Active Internet-Draft (calext WG)
Last updated 2017-06-02 (latest revision 2017-03-13)
Stream IETF
Intended RFC status Informational
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Stream WG state Submitted to IESG for Publication (wg milestone: May 2017 - Send attachment drat... )
Document shepherd Philipp Kewisch
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Responsible AD Alexey Melnikov
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Calendering Extensions                                          C. Daboo
Internet-Draft                                                     Apple
Intended status: Standards Track                             A. Quillaud
Expires: September 14, 2017                                       Oracle
                                                       K. Murchison, Ed.
                                                                     CMU
                                                          March 13, 2017

                       CalDAV Managed Attachments
                draft-ietf-calext-caldav-attachments-02

Abstract

   This specification defines an extension to the calendar access
   protocol (CalDAV) to allow attachments associated with iCalendar data
   to be stored and managed on the server.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on September 14, 2017.

Copyright Notice

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

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of

Daboo, et al.          Expires September 14, 2017               [Page 1]
Internet-Draft         CalDAV Managed Attachments             March 2017

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Conventions Used in This Document . . . . . . . . . . . . . .   3
   3.  Overview  . . . . . . . . . . . . . . . . . . . . . . . . . .   3
     3.1.  Requirements  . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Discovering Support for Managed Attachments . . . . . . .   4
     3.3.  POST Request for Managing Attachments . . . . . . . . . .   4
     3.4.  Adding attachments  . . . . . . . . . . . . . . . . . . .   6
     3.5.  Updating Attachments  . . . . . . . . . . . . . . . . . .   9
     3.6.  Removing Attachments via POST . . . . . . . . . . . . . .  11
     3.7.  Adding Existing Managed Attachments via PUT . . . . . . .  13
     3.8.  Updating Attachments via PUT  . . . . . . . . . . . . . .  13
     3.9.  Removing Attachments via PUT  . . . . . . . . . . . . . .  14
     3.10. Retrieving Attachments  . . . . . . . . . . . . . . . . .  14
     3.11. Error Handling  . . . . . . . . . . . . . . . . . . . . .  14
     3.12. Additional Considerations . . . . . . . . . . . . . . . .  15
   4.  Modifications to iCalendar Syntax . . . . . . . . . . . . . .  16
     4.1.  SIZE Property Parameter . . . . . . . . . . . . . . . . .  16
     4.2.  FILENAME Property Parameter . . . . . . . . . . . . . . .  17
     4.3.  MANAGED-ID Property Parameter . . . . . . . . . . . . . .  17
   5.  Additional Message Header Fields  . . . . . . . . . . . . . .  18
     5.1.  Cal-Managed-ID Response Header Field  . . . . . . . . . .  18
   6.  Additional WebDAV properties  . . . . . . . . . . . . . . . .  18
     6.1.  CALDAV:managed-attachments-server-URL property  . . . . .  18
     6.2.  CALDAV:max-attachment-size property . . . . . . . . . . .  19
     6.3.  CALDAV:max-attachments-per-resource property  . . . . . .  20
   7.  Implementation Status . . . . . . . . . . . . . . . . . . . .  21
   8.  Security Considerations . . . . . . . . . . . . . . . . . . .  23
   9.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .  23
     9.1.  Parameter Registrations . . . . . . . . . . . . . . . . .  23
     9.2.  Message Header Field Registrations  . . . . . . . . . . .  24
   10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . .  24
   11. References  . . . . . . . . . . . . . . . . . . . . . . . . .  24
     11.1.  Normative References . . . . . . . . . . . . . . . . . .  24
     11.2.  Informative References . . . . . . . . . . . . . . . . .  25
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