1 files changed, 69 insertions, 0 deletions
diff --git a/lib/api/helpers/runner.rb b/lib/api/helpers/runner.rb
new file mode 100644
index 00000000000..74848a6e144
--- /dev/null
+++ b/lib/api/helpers/runner.rb
@@ -0,0 +1,69 @@
+module API
+  module Helpers
+    module Runner
+      JOB_TOKEN_HEADER = 'HTTP_JOB_TOKEN'.freeze
+      JOB_TOKEN_PARAM = :token
+      UPDATE_RUNNER_EVERY = 10 * 60
+
+      def runner_registration_token_valid?
+        ActiveSupport::SecurityUtils.variable_size_secure_compare(params[:token],
+                                                                  current_application_settings.runners_registration_token)
+      end
+
+      def get_runner_version_from_params
+        return unless params['info'].present?
+        attributes_for_keys(%w(name version revision platform architecture), params['info'])
+      end
+
+      def authenticate_runner!
+        forbidden! unless current_runner
+      end
+
+      def current_runner
+        @runner ||= ::Ci::Runner.find_by_token(params[:token].to_s)
+      end
+
+      def update_runner_info
+        return unless update_runner?
+
+        current_runner.contacted_at = Time.now
+        current_runner.assign_attributes(get_runner_version_from_params)
+        current_runner.save if current_runner.changed?
+      end
+
+      def update_runner?
+        # Use a random threshold to prevent beating DB updates.
+        # It generates a distribution between [40m, 80m].
+        #
+        contacted_at_max_age = UPDATE_RUNNER_EVERY + Random.rand(UPDATE_RUNNER_EVERY)
+
+        current_runner.contacted_at.nil? ||
+          (Time.now - current_runner.contacted_at) >= contacted_at_max_age
+      end
+
+      def validate_job!(job)
+        not_found! unless job
+
+        yield if block_given?
+
+        forbidden!('Project has been deleted!') unless job.project
+        forbidden!('Job has been erased!') if job.erased?
+      end
+
+      def authenticate_job!(job)
+        validate_job!(job) do
+          forbidden! unless job_token_valid?(job)
+        end
+      end
+
+      def job_token_valid?(job)
+        token = (params[JOB_TOKEN_PARAM] || env[JOB_TOKEN_HEADER]).to_s
+        token && job.valid_token?(token)
+      end
+
+      def max_artifacts_size
+        current_application_settings.max_artifacts_size.megabytes.to_i
+      end
+    end
+  end
+end