git.squeep.com Git - akkoma/blob - lib/pleroma/http/adapter_helper.ex

   1 # Pleroma: A lightweight social networking server
   2 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
   3 # SPDX-License-Identifier: AGPL-3.0-only
   4
   5 defmodule Pleroma.HTTP.AdapterHelper do
   6   @moduledoc """
   7   Configure Tesla.Client with default and customized adapter options.
   8   """
   9   @defaults [pool: :federation, connect_timeout: 5_000, recv_timeout: 5_000]
  10
  11   @type proxy_type() :: :socks4 | :socks5
  12   @type host() :: charlist() | :inet.ip_address()
  13
  14   alias Pleroma.HTTP.AdapterHelper
  15   require Logger
  16
  17   @type proxy ::
  18           {Connection.host(), pos_integer()}
  19           | {Connection.proxy_type(), Connection.host(), pos_integer()}
  20
  21   @callback options(keyword(), URI.t()) :: keyword()
  22
  23   @spec format_proxy(String.t() | tuple() | nil) :: proxy() | nil
  24   def format_proxy(nil), do: nil
  25
  26   def format_proxy(proxy_url) do
  27     case parse_proxy(proxy_url) do
  28       {:ok, host, port} -> {host, port}
  29       {:ok, type, host, port} -> {type, host, port}
  30       _ -> nil
  31     end
  32   end
  33
  34   @spec maybe_add_proxy(keyword(), proxy() | nil) :: keyword()
  35   def maybe_add_proxy(opts, nil), do: opts
  36   def maybe_add_proxy(opts, proxy), do: Keyword.put_new(opts, :proxy, proxy)
  37
  38   @doc """
  39   Merge default connection & adapter options with received ones.
  40   """
  41
  42   @spec options(URI.t(), keyword()) :: keyword()
  43   def options(%URI{} = uri, opts \\ []) do
  44     @defaults
  45     |> Keyword.merge(opts)
  46     |> adapter_helper().options(uri)
  47   end
  48
  49   defp adapter, do: Application.get_env(:tesla, :adapter)
  50
  51   defp adapter_helper do
  52     case adapter() do
  53       Tesla.Adapter.Gun -> AdapterHelper.Gun
  54       Tesla.Adapter.Hackney -> AdapterHelper.Hackney
  55       _ -> AdapterHelper.Default
  56     end
  57   end
  58
  59   @spec parse_proxy(String.t() | tuple() | nil) ::
  60           {:ok, host(), pos_integer()}
  61           | {:ok, proxy_type(), host(), pos_integer()}
  62           | {:error, atom()}
  63           | nil
  64
  65   def parse_proxy(nil), do: nil
  66
  67   def parse_proxy(proxy) when is_binary(proxy) do
  68     with [host, port] <- String.split(proxy, ":"),
  69          {port, ""} <- Integer.parse(port) do
  70       {:ok, parse_host(host), port}
  71     else
  72       {_, _} ->
  73         Logger.warn("Parsing port failed #{inspect(proxy)}")
  74         {:error, :invalid_proxy_port}
  75
  76       :error ->
  77         Logger.warn("Parsing port failed #{inspect(proxy)}")
  78         {:error, :invalid_proxy_port}
  79
  80       _ ->
  81         Logger.warn("Parsing proxy failed #{inspect(proxy)}")
  82         {:error, :invalid_proxy}
  83     end
  84   end
  85
  86   def parse_proxy(proxy) when is_tuple(proxy) do
  87     with {type, host, port} <- proxy do
  88       {:ok, type, parse_host(host), port}
  89     else
  90       _ ->
  91         Logger.warn("Parsing proxy failed #{inspect(proxy)}")
  92         {:error, :invalid_proxy}
  93     end
  94   end
  95
  96   @spec parse_host(String.t() | atom() | charlist()) :: charlist() | :inet.ip_address()
  97   def parse_host(host) when is_list(host), do: host
  98   def parse_host(host) when is_atom(host), do: to_charlist(host)
  99
 100   def parse_host(host) when is_binary(host) do
 101     host = to_charlist(host)
 102
 103     case :inet.parse_address(host) do
 104       {:error, :einval} -> host
 105       {:ok, ip} -> ip
 106     end
 107   end
 108
 109   @spec format_host(String.t()) :: charlist()
 110   def format_host(host) do
 111     host_charlist = to_charlist(host)
 112
 113     case :inet.parse_address(host_charlist) do
 114       {:error, :einval} ->
 115         :idna.encode(host_charlist)
 116
 117       {:ok, _ip} ->
 118         host_charlist
 119     end
 120   end
 121 end