Merge pull request 'Handle errors from HTTP requests gracefully' (#791) from wp-embeds into develop

Reviewed-on: AkkomaGang/akkoma#791

lib/pleroma/http.ex

@@ -75,6 +75,10 @@ def request(method, url, body, headers, options) when is_binary(url) do
     client = Tesla.client([Tesla.Middleware.FollowRedirects, Tesla.Middleware.Telemetry])
 
     request(client, request)
+  rescue
+    e ->
+      Logger.error("Failed to fetch #{url}: #{inspect(e)}")
+      {:error, :fetch_error}
   end
 
   @spec request(Client.t(), keyword()) :: {:ok, Env.t()} | {:error, any()}

test/pleroma/http_test.exs

@@ -69,4 +69,14 @@ test "returns successfully result" do
              }
     end
   end
+
+  describe "Catching errors" do
+    test "rescues when adapter throws an error" do
+      mock(fn
+        %{method: :get, url: "http://example.com/hello"} -> raise ArgumentError
+      end)
+
+      assert HTTP.get("http://example.com/hello") == {:error, :fetch_error}
+    end
+  end
 end

test/pleroma/web/rich_media/helpers_test.exs

@@ -81,4 +81,11 @@ test "refuses to crawl URLs of private network from posts" do
     assert %{} = Helpers.fetch_data_for_activity(activity4)
     assert %{} = Helpers.fetch_data_for_activity(activity5)
   end
+
+  test "catches errors in fetching" do
+    Tesla.Mock.mock(fn _ -> raise ArgumentError end)
+
+    assert {:error, :fetch_error} ==
+             Helpers.rich_media_get("wp-json/oembed/1.0/embed?url=http:%252F%252F")
+  end
 end