X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/eec77d22e408fe3983cba666c6f5185ecf2d15ec..35ade8a042094a27e2ca5cfd5e9754aa3513410c:/apps/workbench/app/controllers/application_controller.rb

diff --git a/apps/workbench/app/controllers/application_controller.rb b/apps/workbench/app/controllers/application_controller.rb
index 4b775c6036..4f5d8fdcd2 100644
--- a/apps/workbench/app/controllers/application_controller.rb
+++ b/apps/workbench/app/controllers/application_controller.rb
@@ -12,6 +12,7 @@ class ApplicationController < ActionController::Base
   # Methods that don't require login should
   #   skip_around_filter :require_thread_api_token
   around_filter :require_thread_api_token, except: ERROR_ACTIONS
+  before_filter :set_cache_buster
   before_filter :accept_uuid_as_id_param, except: ERROR_ACTIONS
   before_filter :check_user_agreements, except: ERROR_ACTIONS
   before_filter :check_user_profile, except: ERROR_ACTIONS
@@ -31,6 +32,12 @@ class ApplicationController < ActionController::Base
                 with: :render_exception)
   end
 
+  def set_cache_buster
+    response.headers["Cache-Control"] = "no-cache, no-store, max-age=0, must-revalidate"
+    response.headers["Pragma"] = "no-cache"
+    response.headers["Expires"] = "Fri, 01 Jan 1990 00:00:00 GMT"
+  end
+
   def unprocessable(message=nil)
     @errors ||= []
 
@@ -704,14 +711,16 @@ class ApplicationController < ActionController::Base
       end
     end
 
-    Job.filter([["uuid", "in", jobs.keys]]).each do |j|
-      jobs[j[:uuid]] = j
-    end
+    if jobs.keys.any?
+      Job.filter([["uuid", "in", jobs.keys]]).each do |j|
+        jobs[j[:uuid]] = j
+      end
 
-    pi.each do |pl|
-      pl.components.each do |k,v|
-        if v.is_a? Hash and v[:job]
-          v[:job] = jobs[v[:job][:uuid]]
+      pi.each do |pl|
+        pl.components.each do |k,v|
+          if v.is_a? Hash and v[:job]
+            v[:job] = jobs[v[:job][:uuid]]
+          end
         end
       end
     end