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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/websocket/frame/ping.ex
defmodule Bandit.WebSocket.Frame.Ping do
@moduledoc false
defstruct data: <<>>
@typedoc "A WebSocket ping frame"
@type t :: %__MODULE__{data: binary()}
@spec deserialize(boolean(), boolean(), iodata()) :: {:ok, t()} | {:error, term()}
def deserialize(true, false, <<data::binary>>) when byte_size(data) <= 125 do
{:ok, %__MODULE__{data: data}}
end
def deserialize(true, false, _payload) do
{:error, "Invalid ping payload (RFC6455§5.5.2)"}
end
def deserialize(false, false, _payload) do
{:error, "Cannot have a fragmented ping frame (RFC6455§5.5.2)"}
end
def deserialize(true, true, _payload) do
{:error, "Cannot have a compressed ping frame (RFC7692§6.1)"}
end
defimpl Bandit.WebSocket.Frame.Serializable do
alias Bandit.WebSocket.Frame.Ping
def serialize(%Ping{} = frame), do: [{0x9, true, false, frame.data}]
end
end