CodeResponse uses 'is_file' helper function

common/lib/capa/capa/responsetypes.py

@@ -800,6 +800,12 @@ class CodeResponse(LoncapaResponse):
     '''
     Grade student code using an external queueing server, called 'xqueue'
 
+    Expects 'xqueue' dict in ModuleSystem with the following keys:
+        system.xqueue = { 'interface': XqueueInterface object,
+                          'callback_url': Per-StudentModule callback URL where results are posted (string),
+                          'default_queuename': Default queuename to submit request (string)
+                        }
+
     External requests are only submitted for student submission grading 
         (i.e. and not for getting reference answers)
     '''
@@ -873,15 +879,16 @@ class CodeResponse(LoncapaResponse):
                     'edX_cmd': 'get_score',
                     'edX_tests': self.tests,
                     'processor': self.code,
-                    'edX_student_response': unicode(submission), # unicode on File object returns its filename
                     }
         
         # Submit request
-        if hasattr(submission, 'read'): # Test for whether submission is a file
+        if is_file(submission):
+            contents.update({'edX_student_response': submission.name})
             (error, msg) = qinterface.send_to_queue(header=xheader,
                                                     body=json.dumps(contents),
                                                     file_to_upload=submission)
         else:
+            contents.update({'edX_student_response': submission})
             (error, msg) = qinterface.send_to_queue(header=xheader,
                                                     body=json.dumps(contents))
 

common/lib/capa/capa/util.py

@@ -39,13 +39,13 @@ def convert_files_to_filenames(answers):
     '''
     new_answers = dict()
     for answer_id in answers.keys():
-        if is_uploaded_file(answers[answer_id]):
+        if is_file(answers[answer_id]):
             new_answers[answer_id] = answers[answer_id].name
         else:
             new_answers[answer_id] = answers[answer_id]
     return new_answers
 
-def is_uploaded_file(file_to_test):
+def is_file(file_to_test):
     '''
     Duck typing to check if 'file_to_test' is a File object
     '''