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HTTP web server and client, supports http1 and http2
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lib/ace/http2/frame/2_priority.ex
defmodule Ace.HTTP2.Frame.Priority do
@moduledoc false
@enforce_keys [:stream_id, :stream_dependency, :weight, :exclusive]
defstruct @enforce_keys
def new(stream_id, stream_dependency, weight, exclusive) do
%__MODULE__{
stream_id: stream_id,
stream_dependency: stream_dependency,
weight: weight,
exclusive: exclusive
}
end
def decode({2, _flags, stream_id, <<exclusive::1, stream_dependency::31, weight::8>>}) when stream_id > 0 do
exclusive = exclusive == 1
if stream_id == stream_dependency do
{:error, {:protocol_error, "Priority frame can not be dependent on own stream"}}
else
{:ok, new(stream_id, stream_dependency, weight, exclusive)}
end
end
def decode({2, _flags, 0, <<_::40>>}) do
{:error, {:protocol_error, "Priority frame not valid on stream 0"}}
end
def decode({2, _flags, _stream_id, _payload}) do
{:error, {:protocol_error, "Priority frame invalid payload length"}}
end
def serialize(frame) do
exclusive = if frame.exclusive, do: 1, else: 0
<<5::24, 2::8, 0::8, 0::1, frame.stream_id::31, exclusive::1, frame.stream_dependency::31, frame.weight::8>>
end
end