JMAP R. Cordier, Ed. Internet-Draft M. Bailly, Ed. Intended status: Standards Track Linagora Expires: March 8, 2020 September 5, 2019 JMAP for Quotas draft-ietf-jmap-quotas-00 Abstract This document specifies a data model for handling quotas on mailboxes with a server using JMAP. 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 https://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 March 8, 2020. Copyright Notice Copyright (c) 2019 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 (https://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 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Cordier & Bailly Expires March 8, 2020 [Page 1] Internet-Draft JMAP Quotas September 2019 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Notational conventions . . . . . . . . . . . . . . . . . 2 1.2. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 1.2.1. Quota . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3. Addition to the capabilities object . . . . . . . . . . . 3 1.3.1. urn::ietf::params::jmap::quota . . . . . . . . . . . 3 2. Quota definition . . . . . . . . . . . . . . . . . . . . . . 3 2.1. The Scope Data Type . . . . . . . . . . . . . . . . . . . 3 2.2. The Quota Object . . . . . . . . . . . . . . . . . . . . 4 2.3. Example . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.4. Quota/get . . . . . . . . . . . . . . . . . . . . . . . . 4 2.4.1. Example . . . . . . . . . . . . . . . . . . . . . . . 5 2.5. Quota/changes . . . . . . . . . . . . . . . . . . . . . . 5 2.5.1. Example . . . . . . . . . . . . . . . . . . . . . . . 5 3. Addition to the Mailbox object . . . . . . . . . . . . . . . 6 4. Security considerations . . . . . . . . . . . . . . . . . . . 6 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 6 5.1. JMAP Capability Registration for "quota" . . . . . . . . 6 6. Normative References . . . . . . . . . . . . . . . . . . . . 6 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 7 1. Introduction JMAP ([RFC8620] - JSON Meta Application Protocol) is a generic protocol for synchronising data, such as mail, calendars or contacts, between a client and a server. It is optimised for mobile and web environments, and aims to provide a consistent interface to different data types. This specification defines a data model for handling mail quotas over JMAP, allowing you to read and explain quota information. This specification does not address quota administration, which should be handled by other means. 1.1. Notational conventions The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here. Type signatures, examples and property descriptions in this document follow the conventions established in section 1.1 of [RFC8620]. Data Cordier & Bailly Expires March 8, 2020 [Page 2] Internet-Draft JMAP Quotas September 2019 types defined in the core specification are also used in this document. Servers MUST support all properties specified for the new data types defined in this document. 1.2. Terminology 1.2.1. Quota A quota is a numeric upper limit that the server is enforcing. Quotas are applied to JMAP Mailbox objects. 1.3. Addition to the capabilities object The capabilities object is returned as part of the JMAP Session object; see [RFC8620], section 2. This document defines one additional capability URI. 1.3.1. urn::ietf::params::jmap::quota This represents support for the Quota data type and associated API methods. Servers supporting this specification MUST add this property to the capabilities object. 2. Quota definition The quota is an object that displays the limit set to a mailbox usage as well as the current usage in regard to that limit. 2.1. The Scope Data Type The *Scope* is a "String" from an enumeration defined list of values, handled by the server. It explains the entities this value applies to. Some custom specifications might provide some additional values. If the client does not specify custom scope specifications in the "using" parameter of the request, the server should respond the JSON value "null", instead of answering a scope value that the client does not support. Standard values are: * "account": Applies for this account * "domain": All users of this domain share this part of the quota * "global": All users of this mail server share this part of the quota Cordier & Bailly Expires March 8, 2020 [Page 3] Internet-Draft JMAP Quotas September 2019 2.2. The Quota Object The quota object MUST contain the following fields: o *id*: "Id" The unique identifier for this object. It should respect the JMAP ID datatype defined in section 1.2 of [RFC8620] o *type*: "String" The type of quota. It should either be "messageCount" or "messageStorageSize". There is two ways we can define a quota: either on a number of emails, or in the amount of bytes. o *used*: "UnsignedInt" The current usage of the mailbox. Computation of this value is handled by the server. o *usedScope*: "Scope" The "Scope" of the current mailbox usage. o *limit*: "UnsignedInt" The limit set by this quota object to the current mailbox. o *limitScope*: "Scope" The "Scope" of the mailbox limit. The quota object MAY contain the following field: o *description*: "String|null" Arbitrary free, human readable, description of this quota. Might be used to explain where the limit comes from and explain the entities this quota applies to. 2.3. Example { "id": "2a06df0d-9865-4e74-a92f-74dcc814270e", "type": "messageCount", "used": 1056, "usedScope": "account", "limit": 2000, "limitScope": "domain", "description": "Personal account usage, bounded by a domain limit" } 2.4. Quota/get Standard "/get" method as described in [RFC8620] section 5.1. The ids argument may be "null" to fetch all at once. Cordier & Bailly Expires March 8, 2020 [Page 4] Internet-Draft JMAP Quotas September 2019 2.4.1. Example Request fetching all quotas related to an account : [[ "Quota/get", { "accountId": "u33084183", "ids": null }, "0" ]] With response : [[ "Quota/get", { "accountId": "u33084183", "state": "78540", "list": [{ "id": "2a06df0d-9865-4e74-a92f-74dcc814270e", "type": "messageCount", "used": 1056, "usedScope": "account", "limit": 2000, "limitScope": "domain", "description": "Personal account usage, bounded by a domain limit" }, { "id": "3b06df0e-3761-4s74-a92f-74dcc963501x", "type": "messageStorageSize", ... }, ...], "notFound": [] }, "0" ]] 2.5. Quota/changes Standard "/changes" method as described in [RFC8620] section 5.2. 2.5.1. Example Request: [[ "Quota/changes", { "accountId": "u33084183", "sinceState": "10824", "maxChanges": 20 }, "0" ] Response: Cordier & Bailly Expires March 8, 2020 [Page 5] Internet-Draft JMAP Quotas September 2019 [[ "Quota/changes", { "accountId": "u33084183", "oldState": "10824", "newState": "10826", "hasMoreChanges": false, "created": [], "updated": ["2a06df0d-9865-4e74-a92f-74dcc814270e"], "destroyed": [] }, "0" ], ... ] 3. Addition to the Mailbox object The following extra property is defined: o *quotaIds:* "Id[]" (default: "[]") A list of quota ids bound to that mailbox, or "[]" if that mailbox has no quota restrictions. This value is server-set. 4. Security considerations All security considerations of JMAP ([RFC8620]) apply to this specification. 5. IANA Considerations 5.1. JMAP Capability Registration for "quota" IANA will register the "quota" JMAP Capability as follows: Capability Name: "urn:ietf:params:jmap:quota" Specification document: this document Intended use: common Change Controller: IETF Security and privacy considerations: this document, section 4. 6. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . Cordier & Bailly Expires March 8, 2020 [Page 6] Internet-Draft JMAP Quotas September 2019 [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . [RFC8620] Jenkins, N. and C. Newman, "The JSON Meta Application Protocol (JMAP)", RFC 8620, DOI 10.17487/RFC8620, July 2019, . Authors' Addresses Rene Cordier (editor) Linagora 100 Terrasse Boieldieu - Tour Franklin Paris - La Defense CEDEX 92042 France Email: rcordier@linagora.com URI: https://www.linagora.com Michael Bailly (editor) Linagora 100 Terrasse Boieldieu - Tour Franklin Paris - La Defense CEDEX 92042 France Email: mbailly@linagora.com URI: https://www.linagora.com Cordier & Bailly Expires March 8, 2020 [Page 7]