git.squeep.com Git - akkoma/blob - lib/pleroma/http/http.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 do
   6   @moduledoc """
   7     Wrapper for `Tesla.request/2`.
   8   """
   9
  10   alias Pleroma.HTTP.AdapterHelper
  11   alias Pleroma.HTTP.Request
  12   alias Pleroma.HTTP.RequestBuilder, as: Builder
  13   alias Tesla.Client
  14   alias Tesla.Env
  15
  16   require Logger
  17
  18   @type t :: __MODULE__
  19   @type method() :: :get | :post | :put | :delete | :head
  20
  21   @doc """
  22   Performs GET request.
  23
  24   See `Pleroma.HTTP.request/5`
  25   """
  26   @spec get(Request.url() | nil, Request.headers(), keyword()) ::
  27           nil | {:ok, Env.t()} | {:error, any()}
  28   def get(url, headers \\ [], options \\ [])
  29   def get(nil, _, _), do: nil
  30   def get(url, headers, options), do: request(:get, url, "", headers, options)
  31
  32   @spec head(Request.url(), Request.headers(), keyword()) :: {:ok, Env.t()} | {:error, any()}
  33   def head(url, headers \\ [], options \\ []), do: request(:head, url, "", headers, options)
  34
  35   @doc """
  36   Performs POST request.
  37
  38   See `Pleroma.HTTP.request/5`
  39   """
  40   @spec post(Request.url(), String.t(), Request.headers(), keyword()) ::
  41           {:ok, Env.t()} | {:error, any()}
  42   def post(url, body, headers \\ [], options \\ []),
  43     do: request(:post, url, body, headers, options)
  44
  45   @doc """
  46   Builds and performs http request.
  47
  48   # Arguments:
  49   `method` - :get, :post, :put, :delete, :head
  50   `url` - full url
  51   `body` - request body
  52   `headers` - a keyworld list of headers, e.g. `[{"content-type", "text/plain"}]`
  53   `options` - custom, per-request middleware or adapter options
  54
  55   # Returns:
  56   `{:ok, %Tesla.Env{}}` or `{:error, error}`
  57
  58   """
  59   @spec request(method(), Request.url(), String.t(), Request.headers(), keyword()) ::
  60           {:ok, Env.t()} | {:error, any()}
  61   def request(method, url, body, headers, options) when is_binary(url) do
  62     uri = URI.parse(url)
  63     adapter_opts = AdapterHelper.options(uri, options || [])
  64
  65     options = put_in(options[:adapter], adapter_opts)
  66     params = options[:params] || []
  67     request = build_request(method, headers, options, url, body, params)
  68
  69     adapter = Application.get_env(:tesla, :adapter)
  70
  71     client = Tesla.client(adapter_middlewares(adapter), adapter)
  72
  73     maybe_limit(
  74       fn ->
  75         request(client, request)
  76       end,
  77       adapter,
  78       adapter_opts
  79     )
  80   end
  81
  82   @spec request(Client.t(), keyword()) :: {:ok, Env.t()} | {:error, any()}
  83   def request(client, request), do: Tesla.request(client, request)
  84
  85   defp build_request(method, headers, options, url, body, params) do
  86     Builder.new()
  87     |> Builder.method(method)
  88     |> Builder.headers(headers)
  89     |> Builder.opts(options)
  90     |> Builder.url(url)
  91     |> Builder.add_param(:body, :body, body)
  92     |> Builder.add_param(:query, :query, params)
  93     |> Builder.convert_to_keyword()
  94   end
  95
  96   @prefix Pleroma.Gun.ConnectionPool
  97   defp maybe_limit(fun, Tesla.Adapter.Gun, opts) do
  98     ConcurrentLimiter.limit(:"#{@prefix}.#{opts[:pool] || :default}", fun)
  99   end
 100
 101   defp maybe_limit(fun, _, _) do
 102     fun.()
 103   end
 104
 105   defp adapter_middlewares(Tesla.Adapter.Gun) do
 106     [Tesla.Middleware.FollowRedirects, Pleroma.Tesla.Middleware.ConnectionPool]
 107   end
 108
 109   defp adapter_middlewares(_), do: []
 110 end