Re: HTTP router point-of-view concerns

[Jeff Pinner <[e-mail]>]

On Fri, Jul 12, 2013 at 2:11 AM, Mike Belshe <[e-mail]> wrote:

> I'm also in favor of removing the compressor completely.
>

So the compressor buys us the ability to share headers between streams and
possibly to reduce the size of the headers via some sort of encoding
(whether it's typed encodings, or huffman compressed strings, or varint
lengths, etc). So a dumb proposal:

A HEADERS frame consists of encoded name values pairs, let's say varint
length followed by UTF-8 bytes of the string (we can argue over compressed
strings, types, etc. later, but basically no indexing into shared state).

Sending a HEADERS frame on Stream-ID 0 creates a set of headers that gets
saved and added to the HEADERS frame that opens any streams after it is
sent. Sending a new HEADERS frame on Stream-ID 0 overwrites the previous
frame.

This allows us to share Cookies, User-Agent, Host, etc. between requests,
but wouldn't allow for any response header sharing. It would allow us to
share headers for pushed responses since those are streams opened by the
server.