Re: Design Issue: Separate HEADERS and PRIORITY Frames, Eliminate HEADERS+PRIORITY
James M Snell <jasnell@gmail.com> Tue, 21 May 2013 16:35 UTC
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From: James M Snell <jasnell@gmail.com>
Date: Tue, 21 May 2013 09:33:39 -0700
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To: Roberto Peon <grmocg@gmail.com>
Cc: HTTP Working Group <ietf-http-wg@w3.org>
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Subject: Re: Design Issue: Separate HEADERS and PRIORITY Frames, Eliminate HEADERS+PRIORITY
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Which is why we could allow for the client sending the PRIORITY frame *before* the initial HEADERS frame. On Tue, May 21, 2013 at 9:31 AM, Roberto Peon <grmocg@gmail.com> wrote: > This separation would introduce a race where the server may start sending > content before it knows the appropriate priority. > > That would be bad. > > On May 21, 2013 9:13 AM, "James M Snell" <jasnell@gmail.com> wrote: >> >> https://github.com/http2/http2-spec/issues/99 >> >> With regards to the discussion over stream re-prioritization, I suggest: >> >> 1. Drop the HEADERS+PRIORITY frame type. >> 2. Create a new separate PRIORITY frame type whose payload is the >> Priority value, no frame-specific flags. >> 3. The PRIORITY frame becomes the only way to set/change the priority >> for a stream. >> >> If it is necessary to allow an endpoint to establish the priority of >> stream prior to actually initiating the stream, we can allow sending a >> PRIORITY frame before the initial HEADERS frame. Doing so would >> effectively reserve the stream id (in the same general manner >> PUSH_PROMISE does). >> >> The advantages of this approach are: >> >> 1. It eliminates any possible confusion and complexity about when to >> use HEADERS+PRIORITY vs. HEADERS >> 2. It provides a single way of setting/change stream priority (as >> opposed to using HEADERS+PRIORITY plus a separate CHANGE-PRIORITY >> frame) >> >
- Design Issue: Separate HEADERS and PRIORITY Frame… James M Snell
- Re: Design Issue: Separate HEADERS and PRIORITY F… Roberto Peon
- Re: Design Issue: Separate HEADERS and PRIORITY F… William Chan (陈智昌)
- Re: Design Issue: Separate HEADERS and PRIORITY F… James M Snell
- Re: Design Issue: Separate HEADERS and PRIORITY F… James M Snell
- Re: Design Issue: Separate HEADERS and PRIORITY F… William Chan (陈智昌)
- Re: Design Issue: Separate HEADERS and PRIORITY F… Patrick McManus
- Re: Design Issue: Separate HEADERS and PRIORITY F… William Chan (陈智昌)
- Re: Design Issue: Separate HEADERS and PRIORITY F… James M Snell
- Re: Design Issue: Separate HEADERS and PRIORITY F… Roberto Peon
- Re: Design Issue: Separate HEADERS and PRIORITY F… James M Snell
- Re: Design Issue: Separate HEADERS and PRIORITY F… Jeff Pinner
- Re: Design Issue: Separate HEADERS and PRIORITY F… Roberto Peon
- Re: Design Issue: Separate HEADERS and PRIORITY F… Jeff Pinner
- Re: Design Issue: Separate HEADERS and PRIORITY F… Roberto Peon
- Re: Design Issue: Separate HEADERS and PRIORITY F… Jeff Pinner
- Re: Design Issue: Separate HEADERS and PRIORITY F… Roberto Peon
- Re: Design Issue: Separate HEADERS and PRIORITY F… Patrick McManus
- Re: Design Issue: Separate HEADERS and PRIORITY F… Jeff Pinner
- Re: Design Issue: Separate HEADERS and PRIORITY F… Roberto Peon
- Re: Design Issue: Separate HEADERS and PRIORITY F… Jeff Pinner
- Re: Design Issue: Separate HEADERS and PRIORITY F… Jeff Pinner
- Re: Design Issue: Separate HEADERS and PRIORITY F… James M Snell
- Re: Design Issue: Separate HEADERS and PRIORITY F… Martin Thomson
- Re: Design Issue: Separate HEADERS and PRIORITY F… Jeff Pinner
- Re: Design Issue: Separate HEADERS and PRIORITY F… William Chan (陈智昌)
- Re: Design Issue: Separate HEADERS and PRIORITY F… Roberto Peon
- Re: Design Issue: Separate HEADERS and PRIORITY F… Jeff Pinner
- Re: Design Issue: Separate HEADERS and PRIORITY F… Roberto Peon
- Re: Design Issue: Separate HEADERS and PRIORITY F… William Chan (陈智昌)