Merge branch 'develop' into 'cleanup/masto_fe-default_settings'

[akkoma] / lib / pleroma / http / http.ex

diff --git a/lib/pleroma/http/http.ex b/lib/pleroma/http/http.ex
index 59afacf4cd54c5fc4659b6e9307dd111dcb4fd8b..b37b3fa8927c252a9b357e51d5635ca20f5d2376 100644 (file)
--- a/lib/pleroma/http/http.ex
+++ b/lib/pleroma/http/http.ex
@@ -1,48 +1,117 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
 defmodule Pleroma.HTTP do
-  require HTTPoison
-  alias Pleroma.HTTP.Connection
+  @moduledoc """
+    Wrapper for `Tesla.request/2`.
+  """
+
+  alias Pleroma.HTTP.AdapterHelper
+  alias Pleroma.HTTP.Request
   alias Pleroma.HTTP.RequestBuilder, as: Builder
+  alias Tesla.Client
+  alias Tesla.Env
+
+  require Logger
+
+  @type t :: __MODULE__
+  @type method() :: :get | :post | :put | :delete | :head
+
+  @doc """
+  Performs GET request.
+
+  See `Pleroma.HTTP.request/5`
+  """
+  @spec get(Request.url() | nil, Request.headers(), keyword()) ::
+          nil | {:ok, Env.t()} | {:error, any()}
+  def get(url, headers \\ [], options \\ [])
+  def get(nil, _, _), do: nil
+  def get(url, headers, options), do: request(:get, url, "", headers, options)
+
+  @spec head(Request.url(), Request.headers(), keyword()) :: {:ok, Env.t()} | {:error, any()}
+  def head(url, headers \\ [], options \\ []), do: request(:head, url, "", headers, options)
+
+  @doc """
+  Performs POST request.
+
+  See `Pleroma.HTTP.request/5`
+  """
+  @spec post(Request.url(), String.t(), Request.headers(), keyword()) ::
+          {:ok, Env.t()} | {:error, any()}
+  def post(url, body, headers \\ [], options \\ []),
+    do: request(:post, url, body, headers, options)
+
+  @doc """
+  Builds and performs http request.
+
+  # Arguments:
+  `method` - :get, :post, :put, :delete, :head
+  `url` - full url
+  `body` - request body
+  `headers` - a keyworld list of headers, e.g. `[{"content-type", "text/plain"}]`
+  `options` - custom, per-request middleware or adapter options
+
+  # Returns:
+  `{:ok, %Tesla.Env{}}` or `{:error, error}`
+
+  """
+  @spec request(method(), Request.url(), String.t(), Request.headers(), keyword()) ::
+          {:ok, Env.t()} | {:error, any()}
+  def request(method, url, body, headers, options) when is_binary(url) do
+    uri = URI.parse(url)
+    adapter_opts = AdapterHelper.options(uri, options[:adapter] || [])
 
-  def request(method, url, body \\ "", headers \\ [], options \\ []) do
-    options =
-      process_request_options(options)
-      |> process_sni_options(url)
+    case AdapterHelper.get_conn(uri, adapter_opts) do
+      {:ok, adapter_opts} ->
+        options = put_in(options[:adapter], adapter_opts)
+        params = options[:params] || []
+        request = build_request(method, headers, options, url, body, params)
 
-    %{}
+        adapter = Application.get_env(:tesla, :adapter)
+
+        client = Tesla.client(adapter_middlewares(adapter), adapter)
+
+        maybe_limit(
+          fn ->
+            request(client, request)
+          end,
+          adapter,
+          adapter_opts
+        )
+
+      # Connection release is handled in a custom FollowRedirects middleware
+      err ->
+        err
+    end
+  end
+
+  @spec request(Client.t(), keyword()) :: {:ok, Env.t()} | {:error, any()}
+  def request(client, request), do: Tesla.request(client, request)
+
+  defp build_request(method, headers, options, url, body, params) do
+    Builder.new()
     |> Builder.method(method)
     |> Builder.headers(headers)
     |> Builder.opts(options)
     |> Builder.url(url)
     |> Builder.add_param(:body, :body, body)
-    |> Enum.into([])
-    |> (&Tesla.request(Connection.new(), &1)).()
+    |> Builder.add_param(:query, :query, params)
+    |> Builder.convert_to_keyword()
   end
 
-  defp process_sni_options(options, nil), do: options
-  defp process_sni_options(options, url) do
-    uri = URI.parse(url)
-    host = uri.host |> to_charlist()
-
-    case uri.scheme do
-      "https" -> options ++ [ssl: [server_name_indication: host]]
-      _ -> options
-    end
+  @prefix Pleroma.Gun.ConnectionPool
+  defp maybe_limit(fun, Tesla.Adapter.Gun, opts) do
+    ConcurrentLimiter.limit(:"#{@prefix}.#{opts[:pool] || :default}", fun)
   end
 
-  def process_request_options(options) do
-    config = Application.get_env(:pleroma, :http, [])
-    proxy = Keyword.get(config, :proxy_url, nil)
-    options = options ++ [adapter: [pool: :default]]
-
-    case proxy do
-      nil -> options
-      _ -> options ++ [proxy: proxy]
-    end
+  defp maybe_limit(fun, _, _) do
+    fun.()
   end
 
-  def get(url, headers \\ [], options \\ []),
-    do: request(:get, url, "", headers, options)
+  defp adapter_middlewares(Tesla.Adapter.Gun) do
+    [Pleroma.HTTP.Middleware.FollowRedirects]
+  end
 
-  def post(url, body, headers \\ [], options \\ []),
-    do: request(:post, url, body, headers, options)
+  defp adapter_middlewares(_), do: []
 end