HTTP/2 support

[cactorium]

I'm guessing this would make good feature request :)

[pyfisch]

Is it possible with current blocking design to write a good HTTP/2 implementation?

[seanmonstar]

I don't see a specific stopper to implementing it with the blocking API.
However, we are exploring using async io for hyper before hyper 1.0.

On Sun, Feb 22, 2015, 11:01 AM Pyfisch notifications@github.com wrote:

Is it possible with current blocking design to write a good HTTP/2
implementation?

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#304 (comment).

[andydude]

I am interested in being assigned to this, but I might look around the hyper source first.

[DemiMarie]

Hyper now uses asynchronous I/O, so HTTP/2 is no longer blocked in async I/O.

[stepancheg]

I have kind of working HTTP/2 implementation: httpbis. ("httpbis" is a name of working group developing HTTP/2, "bis" traslates as "twice".)

https is used in my implementation of gRPC (which works over HTTP/2).

It is a fork of @mlalic's solicit library, which was largely rewritten. Now it contains missing HTTP/2 parts, and it is rewritten using tokio instead of being synchronous.

It implements most of HTTP/2 spec, including multiplexing and proper windowing.

Proper windowing means that client or server won't send WINDOW_UPDATE request untill Stream passed to user callback is polled. So for example, connection won't stall, and memory won't be exhaused if user provided callback is slow.

Current status is that it works, however, it needs lots of polishing, including:

• documenting
• testing
• finding and fixing bugs
• adding configuration options
• designinig better API
• improving performance

(And I could use help for these issues).

If someone's interested I'd like to merge it into Hyper somehow.

[seanmonstar]

@stepancheg wow, exciting! I admit to not having much time to review all of it.

I encourage you to keep working on it, including the list you provided. hyper is far too close to a 0.11 release to try to squeeze in such a huge change. But we can definitely see how the project goes!