Fix import upload limits

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/48060 broke the
import artifact limit by refactoring the max attachment size in lieu of
the max import size.

To fix this, we now implement a controller-specific `maximum_size` and
test this.

Closes https://gitlab.com/gitlab-org/gitlab/-/issues/292110

app/controllers/concerns/workhorse_authorization.rb

@@ -14,7 +14,7 @@ module WorkhorseAuthorization
 
     authorized = uploader_class.workhorse_authorize(
       has_length: false,
-      maximum_size: Gitlab::CurrentSettings.max_attachment_size.megabytes.to_i)
+      maximum_size: maximum_size.to_i)
 
     render json: authorized
   rescue SocketError
@@ -33,6 +33,10 @@ module WorkhorseAuthorization
     raise NotImplementedError
   end
 
+  def maximum_size
+    raise NotImplementedError
+  end
+
   def file_extension_whitelist
     ImportExportUploader::EXTENSION_WHITELIST
   end

app/controllers/import/gitlab_groups_controller.rb

@@ -68,4 +68,8 @@ class Import::GitlabGroupsController < ApplicationController
   def uploader_class
     ImportExportUploader
   end
+
+  def maximum_size
+    Gitlab::CurrentSettings.max_import_size.megabytes
+  end
 end

app/controllers/import/gitlab_projects_controller.rb

@@ -49,4 +49,8 @@ class Import::GitlabProjectsController < Import::BaseController
   def uploader_class
     ImportExportUploader
   end
+
+  def maximum_size
+    Gitlab::CurrentSettings.max_import_size.megabytes
+  end
 end

ee/app/controllers/projects/requirements_management/requirements_controller.rb

@@ -58,6 +58,10 @@ class Projects::RequirementsManagement::RequirementsController < Projects::Appli
     FileUploader
   end
 
+  def maximum_size
+    Gitlab::CurrentSettings.max_attachment_size.megabytes
+  end
+
   def file_extension_whitelist
     EXTENSION_WHITELIST
   end

ee/spec/requests/projects/requirements_management/requirements_controller_spec.rb

@@ -132,6 +132,7 @@ RSpec.describe Projects::RequirementsManagement::RequirementsController do
 
         it_behaves_like 'handle uploads authorize request' do
           let(:uploader_class) { FileUploader }
+          let(:maximum_size) { Gitlab::CurrentSettings.max_attachment_size.megabytes }
         end
       end
 

spec/requests/import/gitlab_groups_controller_spec.rb

@@ -195,6 +195,7 @@ RSpec.describe Import::GitlabGroupsController do
   describe 'POST authorize' do
     it_behaves_like 'handle uploads authorize request' do
       let(:uploader_class) { ImportExportUploader }
+      let(:maximum_size) { Gitlab::CurrentSettings.max_import_size.megabytes }
 
       subject { post authorize_import_gitlab_group_path, headers: workhorse_headers }
     end

spec/requests/import/gitlab_projects_controller_spec.rb

@@ -86,6 +86,7 @@ RSpec.describe Import::GitlabProjectsController do
   describe 'POST authorize' do
     it_behaves_like 'handle uploads authorize request' do
       let(:uploader_class) { ImportExportUploader }
+      let(:maximum_size) { Gitlab::CurrentSettings.max_import_size.megabytes }
 
       subject { post authorize_import_gitlab_project_path, headers: workhorse_headers }
     end

spec/support/shared_examples/requests/uploads_auhorize_shared_examples.rb

@@ -37,6 +37,7 @@ RSpec.shared_examples 'handle uploads authorize request' do
           expect(json_response['RemoteObject']).to have_key('StoreURL')
           expect(json_response['RemoteObject']).to have_key('DeleteURL')
           expect(json_response['RemoteObject']).to have_key('MultipartUpload')
+          expect(json_response['MaximumSize']).to eq(maximum_size)
         end
       end
 
@@ -52,6 +53,7 @@ RSpec.shared_examples 'handle uploads authorize request' do
           expect(response.media_type.to_s).to eq(Gitlab::Workhorse::INTERNAL_API_CONTENT_TYPE)
           expect(json_response['TempPath']).to eq(uploader_class.workhorse_local_upload_path)
           expect(json_response['RemoteObject']).to be_nil
+          expect(json_response['MaximumSize']).to eq(maximum_size)
         end
       end
     end