3 files changed, 80 insertions, 15 deletions

diff --git a/lib/pleroma/reverse_proxy/client.ex b/lib/pleroma/reverse_proxy/client.ex
index 776c4794c..71c2b2911 100644
--- a/lib/pleroma/reverse_proxy/client.ex
+++ b/lib/pleroma/reverse_proxy/client.ex
@@ -3,9 +3,14 @@
 # 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()}
 
@@ -14,8 +19,8 @@ defmodule Pleroma.ReverseProxy.Client do
 
   @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 +28,6 @@ defmodule Pleroma.ReverseProxy.Client do
   def close(ref), do: client().close(ref)
 
   defp client do
-    Pleroma.Config.get([Pleroma.ReverseProxy.Client], :hackney)
+    Pleroma.Config.get([Pleroma.ReverseProxy.Client], Pleroma.ReverseProxy.Client.Tesla)
   end
 end
diff --git a/lib/pleroma/reverse_proxy/client/tesla.ex b/lib/pleroma/reverse_proxy/client/tesla.ex
new file mode 100644
index 000000000..fad577ec1
--- /dev/null
+++ b/lib/pleroma/reverse_proxy/client/tesla.ex
@@ -0,0 +1,60 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-onl
+
+defmodule Pleroma.ReverseProxy.Client.Tesla do
+  @behaviour Pleroma.ReverseProxy.Client
+
+  @adapters [Tesla.Adapter.Gun]
+
+  def request(method, url, headers, body, opts \\ []) do
+    adapter_opts =
+      Keyword.get(opts, :adapter, [])
+      |> Keyword.put(:body_as, :chunks)
+
+    with {:ok, response} <-
+           Pleroma.HTTP.request(
+             method,
+             url,
+             body,
+             headers,
+             Keyword.put(opts, :adapter, adapter_opts)
+           ) do
+      if is_map(response.body),
+        do: {:ok, response.status, response.headers, response.body},
+        else: {:ok, response.status, response.headers}
+    else
+      {:error, error} -> {:error, error}
+    end
+  end
+
+  def stream_body(%{fin: true}), do: :done
+
+  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 = Application.get_env(:tesla, :adapter)
+
+    unless adapter in @adapters do
+      raise "#{adapter} doesn't support reading body in chunks"
+    end
+
+    adapter.read_chunk(pid, stream, opts)
+  end
+
+  def close(pid) do
+    adapter = Application.get_env(:tesla, :adapter)
+
+    unless adapter in @adapters do
+      raise "#{adapter} doesn't support closing connection"
+    end
+
+    adapter.close(pid)
+  end
+end
diff --git a/lib/pleroma/reverse_proxy/reverse_proxy.ex b/lib/pleroma/reverse_proxy/reverse_proxy.ex
index 03efad30a..df4eca207 100644
--- a/lib/pleroma/reverse_proxy/reverse_proxy.ex
+++ b/lib/pleroma/reverse_proxy/reverse_proxy.ex
@@ -58,10 +58,10 @@ 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",
@@ -93,9 +93,9 @@ 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)
+    client_opts =
+      Pleroma.HTTP.Connection.options([])
+      |> Keyword.merge(@default_options)
       |> Keyword.merge(Keyword.get(opts, :http, []))
       |> HTTP.process_request_options()
 
@@ -108,7 +108,7 @@ defmodule Pleroma.ReverseProxy do
         opts
       end
 
-    with {:ok, code, headers, client} <- request(method, url, req_headers, hackney_opts),
+    with {:ok, code, headers, client} <- request(method, url, req_headers, client_opts),
          :ok <-
            header_length_constraint(
              headers,
@@ -147,11 +147,11 @@ 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}
 
@@ -201,7 +201,7 @@ 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 <-