Protocol::HTTP2

Provides a low-level implementation of the HTTP/2 protocol.

Installation

Add this line to your application's Gemfile:

gem 'protocol-http2'

And then execute:

$ bundle

Or install it yourself as:

$ gem install protocol-http2

Usage

Here is a basic HTTP/2 client:

require 'async'
require 'async/io/stream'
require 'async/http/endpoint'
require 'protocol/http2/client'
require 'pry'

Async do
    endpoint = Async::HTTP::Endpoint.parse("https://www.google.com/search?q=kittens")

    peer = endpoint.connect

    puts "Connected to #{peer.inspect}"

    # IO Buffering...
    stream = Async::IO::Stream.new(peer)

    framer = Protocol::HTTP2::Framer.new(stream)
    client = Protocol::HTTP2::Client.new(framer)

    puts "Sending connection preface..."
    client.send_connection_preface

    puts "Creating stream..."
    stream = client.create_stream

    headers = [
        [":scheme", endpoint.scheme],
        [":method", "GET"],
        [":authority", "www.google.com"],
        [":path", endpoint.path],
        ["accept", "*/*"],
    ]

    puts "Sending request on stream id=#{stream.id} state=#{stream.state}..."
    stream.send_headers(nil, headers, Protocol::HTTP2::END_STREAM)

    puts "Waiting for response..."
    $count = 0

    def stream.process_headers(frame)
        headers = super
        puts "Got response headers: #{headers} (#{frame.end_stream?})"
    end

    def stream.receive_data(frame)
        data = super

        $count += data.scan(/kittens/).count

        puts "Got response data: #{data.bytesize}"
    end

    until stream.closed?
        frame = client.read_frame
    end

    puts "Got #{$count} kittens!"

    binding.pry

    puts "Closing client..."
    client.close
end

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

License

Released under the MIT license.

Copyright, 2019, by Samuel G. D. Williams.

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.