An XMPP Sub-protocol for WebSocket
draft-ietf-xmpp-websocket-02
XMPP Working Group L. Stout, Ed.
Internet-Draft &yet
Intended status: Standards Track J. Moffitt
Expires: September 15, 2014 Mozilla
E. Cestari
cstar industries
March 14, 2014
An XMPP Sub-protocol for WebSocket
draft-ietf-xmpp-websocket-02
Abstract
This document defines a binding for the XMPP protocol over a
WebSocket transport layer. A WebSocket binding for XMPP provides
higher performance than the current HTTP binding for XMPP.
Status of This Memo
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provisions of BCP 78 and BCP 79.
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This Internet-Draft will expire on September 15, 2014.
Copyright Notice
Copyright (c) 2014 IETF Trust and the persons identified as the
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Stout, et al. Expires September 15, 2014 [Page 1]
Internet-Draft XMPP over WebSocket March 2014
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. XMPP Sub-Protocol . . . . . . . . . . . . . . . . . . . . . . 3
3.1. Handshake . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2. Messages . . . . . . . . . . . . . . . . . . . . . . . . 4
3.3. XMPP Stream Setup . . . . . . . . . . . . . . . . . . . . 4
3.4. Stream Errors . . . . . . . . . . . . . . . . . . . . . . 5
3.5. Closing the Connection . . . . . . . . . . . . . . . . . 5
3.5.1. see-other-uri . . . . . . . . . . . . . . . . . . . . 6
3.6. Stanzas . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.7. Stream Restarts . . . . . . . . . . . . . . . . . . . . . 7
3.8. Pings and Keepalives . . . . . . . . . . . . . . . . . . 7
3.9. Use of TLS . . . . . . . . . . . . . . . . . . . . . . . 8
3.10. Stream Management . . . . . . . . . . . . . . . . . . . . 8
4. Discovering the WebSocket Connection Method . . . . . . . . . 8
5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
5.1. WebSocket Subprotocol Name . . . . . . . . . . . . . . . 9
5.2. URN Sub-Namespace . . . . . . . . . . . . . . . . . . . . 9
6. Security Considerations . . . . . . . . . . . . . . . . . . . 9
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.1. Normative References . . . . . . . . . . . . . . . . . . 10
7.2. Informative References . . . . . . . . . . . . . . . . . 10
Appendix A. XML Schema . . . . . . . . . . . . . . . . . . . . . 11
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 13
1. Introduction
Applications using the Extensible Messaging and Presence Protocol
(XMPP) (see [RFC6120] and [RFC6121]) on the Web currently make use of
BOSH (see [XEP-0124] and [XEP-0206]), an XMPP binding to HTTP. BOSH
is based on the HTTP long polling technique, and it suffers from high
transport overhead compared to XMPP's native binding to TCP. In
addition, there are a number of other known issues with long polling
[RFC6202], which have an impact on BOSH-based systems.
It would be much better in most circumstances to avoid tunneling XMPP
over HTTP long polled connections and instead use the XMPP protocol
directly. However, the APIs and sandbox that browsers have provided
do not allow this. The WebSocket protocol [RFC6455] exists to solve
these kinds of problems. The WebSocket protocol is a bidirectional
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