adding gun adapter

lib/pleroma/reverse_proxy/client.ex

@@ -3,19 +3,23 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.ReverseProxy.Client do
-  @callback request(atom(), String.t(), [tuple()], String.t(), list()) ::
-              {:ok, pos_integer(), [tuple()], reference() | map()}
-              | {:ok, pos_integer(), [tuple()]}
+  @type status :: pos_integer()
+  @type header_name :: String.t()
+  @type header_value :: String.t()
+  @type headers :: [{header_name(), header_value()}]
+
+  @callback request(atom(), String.t(), headers(), String.t(), list()) ::
+              {:ok, status(), headers(), reference() | map()}
+              | {:ok, status(), headers()}
               | {:ok, reference()}
               | {:error, term()}
 
-  @callback stream_body(reference() | pid() | map()) ::
-              {:ok, binary()} | :done | {:error, String.t()}
+  @callback stream_body(map()) :: {:ok, binary(), map()} | :done | {:error, atom() | String.t()}
 
   @callback close(reference() | pid() | map()) :: :ok
 
-  def request(method, url, headers, "", opts \\ []) do
-    client().request(method, url, headers, "", opts)
+  def request(method, url, headers, body \\ "", opts \\ []) do
+    client().request(method, url, headers, body, opts)
   end
 
   def stream_body(ref), do: client().stream_body(ref)
@@ -23,6 +27,12 @@ defmodule Pleroma.ReverseProxy.Client do
   def close(ref), do: client().close(ref)
 
   defp client do
-    Pleroma.Config.get([Pleroma.ReverseProxy.Client], :hackney)
+    :tesla
+    |> Application.get_env(:adapter)
+    |> client()
   end
+
+  defp client(Tesla.Adapter.Hackney), do: Pleroma.ReverseProxy.Client.Hackney
+  defp client(Tesla.Adapter.Gun), do: Pleroma.ReverseProxy.Client.Tesla
+  defp client(_), do: Pleroma.Config.get!(Pleroma.ReverseProxy.Client)
 end

lib/pleroma/reverse_proxy/client/hackney.ex

@@ -0,0 +1,24 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.ReverseProxy.Client.Hackney do
+  @behaviour Pleroma.ReverseProxy.Client
+
+  @impl true
+  def request(method, url, headers, body, opts \\ []) do
+    :hackney.request(method, url, headers, body, opts)
+  end
+
+  @impl true
+  def stream_body(ref) do
+    case :hackney.stream_body(ref) do
+      :done -> :done
+      {:ok, data} -> {:ok, data, ref}
+      {:error, error} -> {:error, error}
+    end
+  end
+
+  @impl true
+  def close(ref), do: :hackney.close(ref)
+end

lib/pleroma/reverse_proxy/client/tesla.ex

@@ -0,0 +1,87 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.ReverseProxy.Client.Tesla do
+  @type headers() :: [{String.t(), String.t()}]
+  @type status() :: pos_integer()
+
+  @behaviour Pleroma.ReverseProxy.Client
+
+  @spec request(atom(), String.t(), headers(), String.t(), keyword()) ::
+          {:ok, status(), headers}
+          | {:ok, status(), headers, map()}
+          | {:error, atom() | String.t()}
+          | no_return()
+
+  @impl true
+  def request(method, url, headers, body, opts \\ []) do
+    _adapter = check_adapter()
+
+    with opts <- Keyword.merge(opts, body_as: :chunks, mode: :passive),
+         {:ok, response} <-
+           Pleroma.HTTP.request(
+             method,
+             url,
+             body,
+             headers,
+             Keyword.put(opts, :adapter, opts)
+           ) do
+      if is_map(response.body) and method != :head do
+        {:ok, response.status, response.headers, response.body}
+      else
+        {:ok, response.status, response.headers}
+      end
+    else
+      {:error, error} -> {:error, error}
+    end
+  end
+
+  @impl true
+  @spec stream_body(map()) :: {:ok, binary(), map()} | {:error, atom() | String.t()} | :done
+  def stream_body(%{pid: pid, opts: opts, fin: true}) do
+    # if connection was sended and there were redirects, we need to close new conn - pid manually
+    if opts[:old_conn], do: Tesla.Adapter.Gun.close(pid)
+    # if there were redirects we need to checkout old conn
+    conn = opts[:old_conn] || opts[:conn]
+
+    if conn, do: :ok = Pleroma.Pool.Connections.checkout(conn, self(), :gun_connections)
+
+    :done
+  end
+
+  def stream_body(client) do
+    case read_chunk!(client) do
+      {:fin, body} ->
+        {:ok, body, Map.put(client, :fin, true)}
+
+      {:nofin, part} ->
+        {:ok, part, client}
+
+      {:error, error} ->
+        {:error, error}
+    end
+  end
+
+  defp read_chunk!(%{pid: pid, stream: stream, opts: opts}) do
+    adapter = check_adapter()
+    adapter.read_chunk(pid, stream, opts)
+  end
+
+  @impl true
+  @spec close(map) :: :ok | no_return()
+  def close(%{pid: pid}) do
+    adapter = check_adapter()
+    adapter.close(pid)
+  end
+
+  defp check_adapter do
+    adapter = Application.get_env(:tesla, :adapter)
+
+    unless adapter == Tesla.Adapter.Gun do
+      raise "#{adapter} doesn't support reading body in chunks"
+    end
+
+    adapter
+  end
+end

lib/pleroma/reverse_proxy/reverse_proxy.ex

@@ -3,8 +3,6 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.ReverseProxy do
-  alias Pleroma.HTTP
-
   @keep_req_headers ~w(accept user-agent accept-encoding cache-control if-modified-since) ++
                       ~w(if-unmodified-since if-none-match if-range range)
   @resp_cache_headers ~w(etag date last-modified cache-control)
@@ -61,10 +59,10 @@ defmodule Pleroma.ReverseProxy do
 
   * `req_headers`, `resp_headers` additional headers.
 
-  * `http`: options for [hackney](https://github.com/benoitc/hackney).
+  * `http`: options for [gun](https://github.com/ninenines/gun).
 
   """
-  @default_hackney_options [pool: :media]
+  @default_options [pool: :media]
 
   @inline_content_types [
     "image/gif",
@@ -97,11 +95,7 @@ defmodule Pleroma.ReverseProxy do
   def call(_conn, _url, _opts \\ [])
 
   def call(conn = %{method: method}, url, opts) when method in @methods do
-    hackney_opts =
-      Pleroma.HTTP.Connection.hackney_options([])
-      |> Keyword.merge(@default_hackney_options)
-      |> Keyword.merge(Keyword.get(opts, :http, []))
-      |> HTTP.process_request_options()
+    client_opts = Keyword.merge(@default_options, Keyword.get(opts, :http, []))
 
     req_headers = build_req_headers(conn.req_headers, opts)
 
@@ -113,7 +107,7 @@ defmodule Pleroma.ReverseProxy do
       end
 
     with {:ok, nil} <- Cachex.get(:failed_proxy_url_cache, url),
-         {:ok, code, headers, client} <- request(method, url, req_headers, hackney_opts),
+         {:ok, code, headers, client} <- request(method, url, req_headers, client_opts),
          :ok <-
            header_length_constraint(
              headers,
@@ -159,11 +153,11 @@ defmodule Pleroma.ReverseProxy do
     |> halt()
   end
 
-  defp request(method, url, headers, hackney_opts) do
+  defp request(method, url, headers, opts) do
     Logger.debug("#{__MODULE__} #{method} #{url} #{inspect(headers)}")
     method = method |> String.downcase() |> String.to_existing_atom()
 
-    case client().request(method, url, headers, "", hackney_opts) do
+    case client().request(method, url, headers, "", opts) do
       {:ok, code, headers, client} when code in @valid_resp_codes ->
         {:ok, code, downcase_headers(headers), client}
 
@@ -213,7 +207,7 @@ defmodule Pleroma.ReverseProxy do
              duration,
              Keyword.get(opts, :max_read_duration, @max_read_duration)
            ),
-         {:ok, data} <- client().stream_body(client),
+         {:ok, data, client} <- client().stream_body(client),
          {:ok, duration} <- increase_read_duration(duration),
          sent_so_far = sent_so_far + byte_size(data),
          :ok <-