Merge branch 'release/2.2.0' into 'stable'v2.2.0

Release/2.2.0

See merge request pleroma/secteam/pleroma!19

1 files changed, 110 insertions, 0 deletions

diff --git a/lib/pleroma/http.ex b/lib/pleroma/http.ex
new file mode 100644
index 000000000..052597191
--- /dev/null
+++ b/lib/pleroma/http.ex
@@ -0,0 +1,110 @@
+# 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
+  @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 || [])
+
+    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
+    )
+  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)
+    |> Builder.add_param(:query, :query, params)
+    |> Builder.convert_to_keyword()
+  end
+
+  @prefix Pleroma.Gun.ConnectionPool
+  defp maybe_limit(fun, Tesla.Adapter.Gun, opts) do
+    ConcurrentLimiter.limit(:"#{@prefix}.#{opts[:pool] || :default}", fun)
+  end
+
+  defp maybe_limit(fun, _, _) do
+    fun.()
+  end
+
+  defp adapter_middlewares(Tesla.Adapter.Gun) do
+    [Tesla.Middleware.FollowRedirects, Pleroma.Tesla.Middleware.ConnectionPool]
+  end
+
+  defp adapter_middlewares(_), do: []
+end