[hybi] WebSocket subprotocol parameters
Tobias Oberstein <tobias.oberstein@tavendo.de> Fri, 17 January 2014 09:25 UTC
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From: Tobias Oberstein <tobias.oberstein@tavendo.de>
To: "hybi@ietf.org" <hybi@ietf.org>
Date: Fri, 17 Jan 2014 01:24:45 -0800
Thread-Topic: WebSocket subprotocol parameters
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Subject: [hybi] WebSocket subprotocol parameters
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The "Sec-WebSocket-Extensions" allows for parameters for each element, eg (from "permessage-deflate"): Sec-WebSocket-Extensions: permessage-deflate; client_max_window_bits; server_max_window_bits=10, permessage-deflate; client_max_window_bits Similar seems to be disallowed for _subprotocols_. RFC6455 says: """ The elements that comprise this value MUST be non-empty strings with characters in the range U+0021 to U+007E not including separator characters as defined in [RFC2616] and MUST all be unique strings. The ABNF for the value of this header field is 1#token, where the definitions of constructs and rules are as given in [RFC2616]. """ and RFC2616 says: """ token = 1*<any CHAR except CTLs or separators> separators = "(" | ")" | "<" | ">" | "@" | "," | ";" | ":" | "\" | <"> | "/" | "[" | "]" | "?" | "=" | "{" | "}" | SP | HAT """ So Sec-WebSocket-Protocol: wamp; version=2; serialization=msgpack; batched, wamp; version=1 is disallowed, right? This is unfortunate, since "simulating parameters" like Sec-WebSocket-Protocol: wamp.2.msgpack.batched, wamp is a hack, and more so, RFC6455 requires that all subprotocol name be registered via the " WebSocket Subprotocol Name Registry". This would mean registering all subprotocol variants: wamp wamp.2.json wamp.2.msgpack wamp.2.json.batched wamp.2.msgpack.batched .. Was there any good reason disallowing parameters for "Sec-WebSocket-Protocol"? If not, could this be fixed via errata for RFC6455? /Tobias
- [hybi] WebSocket subprotocol parameters Tobias Oberstein
- Re: [hybi] WebSocket subprotocol parameters Julian Reschke
- Re: [hybi] WebSocket subprotocol parameters Tobias Oberstein
- Re: [hybi] WebSocket subprotocol parameters Bjoern Hoehrmann
- Re: [hybi] WebSocket subprotocol parameters Takeshi Yoshino
- Re: [hybi] WebSocket subprotocol parameters Tobias Oberstein
- Re: [hybi] WebSocket subprotocol parameters Peter Thorson
- Re: [hybi] WebSocket subprotocol parameters Tobias Oberstein
- Re: [hybi] WebSocket subprotocol parameters Peter Thorson
- Re: [hybi] WebSocket subprotocol parameters Tobias Oberstein
- Re: [hybi] WebSocket subprotocol parameters Takeshi Yoshino
- Re: [hybi] WebSocket subprotocol parameters Martin J. Dürst
- Re: [hybi] WebSocket subprotocol parameters Tobias Oberstein
- Re: [hybi] WebSocket subprotocol parameters Takeshi Yoshino