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A pure-Elixir HTTP server built for Plug & WebSock apps
Security advisory:
This version has known vulnerabilities.
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lib/bandit/http2/frame/window_update.ex
defmodule Bandit.HTTP2.Frame.WindowUpdate do
@moduledoc false
alias Bandit.HTTP2.{Connection, Errors, Frame, Serializable, Stream}
defstruct stream_id: nil,
size_increment: nil
@typedoc "An HTTP/2 WINDOW_UPDATE frame"
@type t :: %__MODULE__{
stream_id: Stream.stream_id(),
size_increment: non_neg_integer()
}
@spec deserialize(Frame.flags(), Stream.stream_id(), iodata()) ::
{:ok, t()} | {:error, Connection.error()}
def deserialize(_flags, _stream_id, <<_reserved::1, 0::31>>) do
{:error,
{:connection, Errors.flow_control_error(),
"Invalid WINDOW_UPDATE size increment (RFC7540§6.9)"}}
end
def deserialize(_flags, stream_id, <<_reserved::1, size_increment::31>>) do
{:ok, %__MODULE__{stream_id: stream_id, size_increment: size_increment}}
end
def deserialize(_flags, _stream_id, _payload) do
{:error,
{:connection, Errors.frame_size_error(), "Invalid WINDOW_UPDATE frame (RFC7540§6.9)"}}
end
defimpl Serializable do
alias Bandit.HTTP2.Frame.WindowUpdate
def serialize(%WindowUpdate{} = frame, _max_frame_size) do
[{0x8, 0, frame.stream_id, <<0::1, frame.size_increment::31>>}]
end
end
end