Design Space for Bidirectional Protocols

Document Type Expired Internet-Draft (hybi WG)
Authors Jack Moffitt  , Salvatore Loreto  , Peter Saint-Andre  , Stefano Salsano 
Last updated 2010-06-28
Stream Internet Engineering Task Force (IETF)
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


As technologies for bidirectional communication over HTTP have become pervasive, interest has grown in (1) defining improved mechanisms for support of existing technologies (short-term solutions such as new HTTP headers) and (2) the development of new bidirectional protocols (long-term solutions such as WebSocket, Bidirectional Web Transfer Protocol, and Reverse HTTP). In order to provide context for such work, this document provides a tentative map of the design space for bidirectional HTTP, with special attention to deployed infrastructure (e.g. web clients, intermediaries, firewalls, NATs, web servers) and programming environments.


Jack Moffitt (
Salvatore Loreto (
Peter Saint-Andre (
Stefano Salsano (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)