mobilizon/lib/service/http/utils.ex

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defmodule Mobilizon.Service.HTTP.Utils do
@moduledoc """
Utils for HTTP operations
"""
@spec get_header(Enum.t(), String.t()) :: String.t() | nil
def get_header(headers, key) do
key = String.downcase(key)
case List.keyfind(headers, key, 0) do
{^key, value} -> String.downcase(value)
nil -> nil
end
end
@spec is_content_type?(Enum.t(), String.t() | list(String.t())) :: boolean
def is_content_type?(headers, content_type) do
headers
|> get_header("Content-Type")
|> content_type_header_matches(content_type)
end
@spec content_type_header_matches(String.t() | nil, Enum.t()) :: boolean
defp content_type_header_matches(header, content_types)
defp content_type_header_matches(nil, _content_types), do: false
defp content_type_header_matches(header, content_type)
when is_binary(header) and is_binary(content_type),
do: content_type_header_matches(header, [content_type])
defp content_type_header_matches(header, content_types)
when is_binary(header) and is_list(content_types) do
Enum.any?(content_types, fn content_type -> String.starts_with?(header, content_type) end)
end
end