Merged r21948 from trunk to 5.0-stable (#37880).

git-svn-id: https://svn.redmine.org/redmine/branches/5.0-stable@21949 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/attachments_controller.rb

@@ -239,11 +239,28 @@ class AttachmentsController < ApplicationController
     if @attachments.sum(&:filesize) > bulk_download_max_size
       flash[:error] = l(:error_bulk_download_size_too_big,
                         :max_size => number_to_human_size(bulk_download_max_size.to_i))
-      redirect_to back_url
+      redirect_back_or_default(container_url, referer: true)
       return
     end
   end
 
+  def container_url
+    case @container
+    when Message
+      url_for(@container.event_url)
+    when Project
+      # project attachments are listed in the files view
+      project_files_url(@container)
+    when Version
+      # version attachments are listed in its project's files view
+      project_files_url(@container.project)
+    when WikiPage
+      project_wiki_page_url @container.wiki.project, @container
+    else
+      url_for(@container)
+    end
+  end
+
   # Checks that the file exists and is readable
   def file_readable
     if @attachment.readable?

test/functional/attachments_controller_test.rb

@@ -631,7 +631,23 @@ class AttachmentsControllerTest < Redmine::ControllerTest
         :params => {
           :object_type => 'issues',
           :object_id => '2',
-          :back_url => '/issues/2'
+          :back_url => '/issues/123'
+        }
+      )
+      assert_redirected_to '/issues/123'
+      assert_equal flash[:error], 'These attachments cannot be bulk downloaded because the total file size exceeds the maximum allowed size (0 Bytes)'
+    end
+  end
+
+  def test_download_all_redirects_to_container_url_on_error
+    with_settings :bulk_download_max_size => 0 do
+      @request.session[:user_id] = 2
+      get(
+        :download_all,
+        :params => {
+          :object_type => 'issues',
+          :object_id => '2',
+          :back_url => 'https://example.com'
         }
       )
       assert_redirected_to '/issues/2'