1 files changed, 45 insertions, 0 deletions
diff --git a/app/validators/import/gitlab_projects/remote_file_validator.rb b/app/validators/import/gitlab_projects/remote_file_validator.rb
new file mode 100644
index 00000000000..67bf102e928
--- /dev/null
+++ b/app/validators/import/gitlab_projects/remote_file_validator.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+module Import
+  module GitlabProjects
+    # Validates the given object's #content_type and #content_length accordingly
+    # with the Project Import requirements
+    class RemoteFileValidator < ActiveModel::Validator
+      FILE_SIZE_LIMIT = 10.gigabytes
+      ALLOWED_CONTENT_TYPES = [
+        'application/gzip',
+        # S3 uses different file types
+        'application/x-tar',
+        'application/x-gzip'
+      ].freeze
+
+      def validate(record)
+        validate_content_length(record)
+        validate_content_type(record)
+      end
+
+      private
+
+      def validate_content_length(record)
+        if record.content_length.to_i <= 0
+          record.errors.add(:content_length, :size_too_small, file_size: humanize(1.byte))
+        elsif record.content_length > FILE_SIZE_LIMIT
+          record.errors.add(:content_length, :size_too_big, file_size: humanize(FILE_SIZE_LIMIT))
+        end
+      end
+
+      def humanize(number)
+        ActiveSupport::NumberHelper.number_to_human_size(number)
+      end
+
+      def validate_content_type(record)
+        return if ALLOWED_CONTENT_TYPES.include?(record.content_type)
+
+        record.errors.add(:content_type, "'%{content_type}' not allowed. (Allowed: %{allowed})" % {
+          content_type: record.content_type,
+          allowed: ALLOWED_CONTENT_TYPES.join(', ')
+        })
+      end
+    end
+  end
+end