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Re: [hybi] WS URLs

Alexey Melnikov <alexey.melnikov@isode.com> Mon, 24 October 2011 13:02 UTC

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From: Alexey Melnikov <alexey.melnikov@isode.com>
To: Tobias Oberstein <tobias.oberstein@tavendo.de>
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Subject: Re: [hybi] WS URLs
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Hi Tobias,

On Sat, Oct 22, 2011 at 5:40 PM, Tobias Oberstein <
tobias.oberstein@tavendo.de> wrote:

> 2 short questions .. first one is part of
> http://bugs.python.org/issue13244
>
> Which of the following URLs are valid WS URLs?
>
> 1. ws://example.com/something#somewhere
> 2. ws://example.com/something#somewhere/
> 3. ws://example.com/something#somewhere/foo
> 4. ws://example.com/something?query=foo#bar

I think all of these are invalid.

> 5. ws://example.com/something%23somewhere
> 6. ws://example.com/something%23somewhere/
> 7. ws://example.com/something%23somewhere/foo
> 8. ws://example.com/something?query=foo%23bar
>
> %23 = # "percentage escaped"
>
> Hybi-17 spec:
>
> "Fragment identifiers are meaningless in the context of WebSocket
> URIs, and MUST NOT be used on these URIs.  The character "#" in URIs
> MUST be escaped as %23 if used as part of the query component."
>
> "path = <path-abempty, defined in [RFC3986], Section 3.3>"
>
> http://tools.ietf.org/html/rfc3986:
>
> "The path is terminated by the first question mark ("?") or number sign
> ("#") character, or by the end of the URI."
>
> ==
>
> When an invalid WS URLs is received in the client request during opening
> handshake,
> how is the server supposed to react?
>
As far as I remember WS/WSS URLs are not sent during the opening handshake.
They can only be used to initiate one.

> Fail the handshake (i.e. http 400 Bad request), or "ignore" invalid parts
> (like fragment component)?

As per above, the WebSocket server doesn't need to do this.

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