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# -*- frozen-string-literal: true -*-
module Plum
# HTTP/2 client session.
class ClientSession
HTTP2_DEFAULT_SETTINGS = {
enable_push: 0, # TODO: api?
initial_window_size: 2 ** 30, # TODO
}
attr_reader :plum
def initialize(socket, config)
@socket = socket
@config = config
@http2_settings = HTTP2_DEFAULT_SETTINGS.merge(@config[:http2_settings])
@plum = setup_plum
@responses = Set.new
end
def succ
@plum << @socket.readpartial(16384)
rescue => e
fail(e)
end
def empty?
@responses.empty?
end
def close
@closed = true
@responses.each(&:_fail)
@responses.clear
@plum.close
end
def request(headers, body, options, &headers_cb)
headers = { ":method" => nil,
":path" => nil,
":authority" => @config[:hostname],
":scheme" => @config[:scheme]
}.merge(headers)
response = Response.new(**options)
@responses << response
stream = @plum.open_stream
stream.send_headers(headers, end_stream: !body)
stream.send_data(body, end_stream: true) if body
stream.on(:headers) { |resp_headers_raw|
response._headers(resp_headers_raw)
headers_cb.call(response) if headers_cb
}
stream.on(:data) { |chunk|
response._chunk(chunk)
check_window(stream)
}
stream.on(:end_stream) {
response._finish
@responses.delete(response)
}
stream.on(:stream_error) { |ex|
response._fail
raise ex
}
stream.on(:local_stream_error) { |type|
response.fail
raise LocalStreamError.new(type)
}
response
end
private
def fail(exception)
close
raise exception
end
def setup_plum
plum = ClientConnection.new(@socket.method(:write), @http2_settings)
plum.on(:connection_error) { |ex|
fail(ex)
}
plum.window_update(@http2_settings[:initial_window_size])
plum
end
def check_window(stream)
ws = @http2_settings[:initial_window_size]
stream.window_update(ws) if stream.recv_remaining_window < (ws / 2)
@plum.window_update(ws) if @plum.recv_remaining_window < (ws / 2)
end
end
end
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