35 lines
995 B
Elixir
35 lines
995 B
Elixir
defmodule Mobilizon.Federation.NodeInfo do
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@moduledoc """
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Performs NodeInfo requests
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"""
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alias Mobilizon.Service.HTTP.WebfingerClient
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require Logger
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@application_uri "https://www.w3.org/ns/activitystreams#Application"
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@env Application.compile_env(:mobilizon, :env)
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@spec application_actor(String.t()) :: String.t() | nil
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def application_actor(host) do
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prefix = if @env !== :dev, do: "https", else: "http"
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case WebfingerClient.get("#{prefix}://#{host}/.well-known/nodeinfo") do
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{:ok, %{body: body, status: code}} when code in 200..299 ->
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extract_application_actor(body)
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err ->
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Logger.debug("Failed to fetch NodeInfo data #{inspect(err)}")
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nil
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end
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end
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defp extract_application_actor(body) do
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body
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|> Map.get("links", [])
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|> Enum.find(%{"rel" => @application_uri, "href" => nil}, fn %{"rel" => rel, "href" => href} ->
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rel == @application_uri and is_binary(href)
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end)
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|> Map.get("href")
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end
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end
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