TwitterAPI: allow deleting one's own account with request body

lib/pleroma/web/api_spec/operations/twitter_util_operation.ex

@@ -188,6 +188,7 @@ defmodule Pleroma.Web.ApiSpec.TwitterUtilOperation do
       parameters: [
         Operation.parameter(:password, :query, :string, "Password")
       ],
+      requestBody: request_body("Parameters", delete_account_request(), required: false),
       responses: %{
         200 =>
           Operation.response("Success", "application/json", %Schema{
@@ -234,4 +235,22 @@ defmodule Pleroma.Web.ApiSpec.TwitterUtilOperation do
       responses: %{200 => Operation.response("Web Page", "test/html", %Schema{type: :string})}
     }
   end
+
+  defp delete_account_request do
+    %Schema{
+      title: "AccountDeleteRequest",
+      description: "POST body for deleting one's own account",
+      type: :object,
+      properties: %{
+        password: %Schema{
+          type: :string,
+          description: "The user's own password for confirmation.",
+          format: :password
+        }
+      },
+      example: %{
+        "password" => "prettyp0ony1313"
+      }
+    }
+  end
 end

lib/pleroma/web/twitter_api/controllers/util_controller.ex

@@ -123,8 +123,10 @@ defmodule Pleroma.Web.TwitterAPI.UtilController do
     end
   end
 
-  def delete_account(%{assigns: %{user: user}} = conn, params) do
-    password = params[:password] || ""
+  def delete_account(%{assigns: %{user: user}, body_params: body_params} = conn, params) do
+    # This endpoint can accept a query param or JSON body for backwards-compatibility.
+    # Submitting a JSON body is recommended, so passwords don't end up in server logs.
+    password = body_params[:password] || params[:password] || ""
 
     case CommonAPI.Utils.confirm_current_password(user, password) do
       {:ok, user} ->

test/pleroma/web/twitter_api/util_controller_test.exs

@@ -444,7 +444,10 @@ defmodule Pleroma.Web.TwitterAPI.UtilControllerTest do
 
     test "with proper permissions and wrong or missing password", %{conn: conn} do
       for params <- [%{"password" => "hi"}, %{}] do
-        ret_conn = post(conn, "/api/pleroma/delete_account", params)
+        ret_conn =
+          conn
+          |> put_req_header("content-type", "application/json")
+          |> post("/api/pleroma/delete_account", params)
 
         assert json_response_and_validate_schema(ret_conn, 200) == %{
                  "error" => "Invalid password."
@@ -452,8 +455,28 @@ defmodule Pleroma.Web.TwitterAPI.UtilControllerTest do
       end
     end
 
-    test "with proper permissions and valid password", %{conn: conn, user: user} do
-      conn = post(conn, "/api/pleroma/delete_account?password=test")
+    test "with proper permissions and valid password (URL query)", %{conn: conn, user: user} do
+      conn =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> post("/api/pleroma/delete_account?password=test")
+
+      ObanHelpers.perform_all()
+      assert json_response_and_validate_schema(conn, 200) == %{"status" => "success"}
+
+      user = User.get_by_id(user.id)
+      refute user.is_active
+      assert user.name == nil
+      assert user.bio == ""
+      assert user.password_hash == nil
+    end
+
+    test "with proper permissions and valid password (JSON body)", %{conn: conn, user: user} do
+      conn =
+        conn
+        |> put_req_header("content-type", "application/json")
+        |> post("/api/pleroma/delete_account", %{password: "test"})
+
       ObanHelpers.perform_all()
       assert json_response_and_validate_schema(conn, 200) == %{"status" => "success"}