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furlex

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Furlex is a structured data extraction tool written in Elixir. It currently supports unfurling oEmbed, Twitter Card, Facebook Open Graph, JSON-LD and plain ole' HTML `<meta />` data out of any url you supply.

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furlex lib furlex parser twitter.ex
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lib/furlex/parser/twitter.ex 

defmodule Furlex.Parser.Twitter do

  @behaviour Furlex.Parser



  alias Furlex.Parser



  @tags ~w(

    twitter:card twitter:site twitter:domain twitter:url twitter:site:id

    twitter:creator twitter:creator:id twitter:description twitter:title

    twitter:image twitter:image:alt twitter:player twitter:player:width

    twitter:player:height twitter:player:stream twitter:app:name:iphone

    twitter:app:id:iphone twitter:app:url:iphone twitter:app:name:ipad

    twitter:app:id:ipad twitter:app:url:ipad twitter:app:name:googleplay

    twitter:app:url:googleplay twitter:app:id:googleplay

  )



  @spec parse(String.t) :: {:ok, Map.t}

  def parse(html) do

    meta = &("meta[name=\"#{&1}\"]")

    map  = Parser.extract tags(), html, meta



    {:ok, map}

  end



  @doc false

  def tags do

    (config(:tags) || [])

    |> Enum.concat(@tags)

    |> Enum.uniq()

  end



  defp config(key), do: Application.get_env(:furlex, __MODULE__)[key]

end