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libcluster_gce

0.0.1
0.0.1

Clustering strategy for connecting nodes running on Google App Engine.

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libcluster_gce lib cluster_gce access_token.ex
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lib/cluster_gce/access_token.ex 

defmodule ClusterGCE.AccessToken do

  @type token :: String.t()



  @access_token_path 'http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token'

  @headers [{'Metadata-Flavor', 'Google'}]



  @spec get :: {:ok, token} | {:error, :failed_connect}

  def get do

    :get

    |> :httpc.request({@access_token_path, @headers}, [], [])

    |> case do

      {:ok, {{_, 200, _}, _headers, body}} ->

        %{"access_token" => token} = Jason.decode!(body)

        {:ok, token}



      {:error, {:failed_connect, _}} ->

        {:error, :failed_connect}

    end

  end

end