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Merge pull request #185 from MITx/kimth/lms-coderesponse

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Kimth/lms coderesponse
This commit is contained in:
Calen Pennington
2012-07-19 06:29:48 -07:00
parent 2eaa6dbc25 cc9f9a9df8
commit 49ee12963f
8 changed files with 285 additions and 55 deletions
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44
common/lib/capa/capa/capa_problem.py
View File

@@ -118,6 +118,9 @@ class LoncapaProblem(object):
# the dict has keys = xml subtree of Response, values = Response instance
self._preprocess_problem(self.tree)
if not self.student_answers: # True when student_answers is an empty dict
self.set_initial_display()
def do_reset(self):
'''
Reset internal state to unfinished, with no answers
@@ -126,6 +129,14 @@ class LoncapaProblem(object):
self.correct_map = CorrectMap()
self.done = False
def set_initial_display(self):
initial_answers = dict()
for responder in self.responders.values():
if hasattr(responder,'get_initial_display'):
initial_answers.update(responder.get_initial_display())
self.student_answers = initial_answers
def __unicode__(self):
return u"LoncapaProblem ({0})".format(self.problem_id)
@@ -180,14 +191,31 @@ class LoncapaProblem(object):
return {'score': correct,
'total': self.get_max_score()}
def update_score(self, score_msg):
newcmap = CorrectMap()
def update_score(self, score_msg, queuekey):
'''
Deliver grading response (e.g. from async code checking) to
the specific ResponseType that requested grading
Returns an updated CorrectMap
'''
cmap = CorrectMap()
cmap.update(self.correct_map)
for responder in self.responders.values():
if hasattr(responder,'update_score'): # Is this the best way to implement 'update_score' for CodeResponse?
results = responder.update_score(score_msg)
newcmap.update(results)
self.correct_map = newcmap
return newcmap
if hasattr(responder,'update_score'):
# Each LoncapaResponse will update the specific entries of 'cmap' that it's responsible for
cmap = responder.update_score(score_msg, cmap, queuekey)
self.correct_map.set_dict(cmap.get_dict())
return cmap
def is_queued(self):
'''
Returns True if any part of the problem has been submitted to an external queue
'''
queued = False
for answer_id in self.correct_map:
if self.correct_map.is_queued(answer_id):
queued = True
return queued
def grade_answers(self, answers):
'''
@@ -457,7 +485,7 @@ class LoncapaProblem(object):
self.responder_answers = {}
for response in self.responders.keys():
try:
self.responder_answers[response] = responder.get_answers()
self.responder_answers[response] = self.responders[response].get_answers()
except:
log.debug('responder %s failed to properly return get_answers()' % self.responders[response]) # FIXME
raise

10
common/lib/capa/capa/correctmap.py
View File

@@ -14,6 +14,7 @@ class CorrectMap(object):
- msg : string (may have HTML) giving extra message response (displayed below textline or textbox)
- hint : string (may have HTML) giving optional hint (displayed below textline or textbox, above msg)
- hintmode : one of (None,'on_request','always') criteria for displaying hint
- queuekey : a random integer for xqueue_callback verification
Behaves as a dict.
'''
@@ -29,13 +30,14 @@ class CorrectMap(object):
def __iter__(self):
return self.cmap.__iter__()
def set(self, answer_id=None, correctness=None, npoints=None, msg='', hint='', hintmode=None):
def set(self, answer_id=None, correctness=None, npoints=None, msg='', hint='', hintmode=None, queuekey=None):
if answer_id is not None:
self.cmap[answer_id] = {'correctness': correctness,
'npoints': npoints,
'msg': msg,
'hint' : hint,
'hintmode' : hintmode,
'queuekey' : queuekey,
}
def __repr__(self):
@@ -63,6 +65,12 @@ class CorrectMap(object):
if answer_id in self.cmap: return self.cmap[answer_id]['correctness'] == 'correct'
return None
def is_queued(self,answer_id):
return answer_id in self.cmap and self.cmap[answer_id]['queuekey'] is not None
def is_right_queuekey(self, answer_id, test_key):
return answer_id in self.cmap and self.cmap[answer_id]['queuekey'] == test_key
def get_npoints(self,answer_id):
if self.is_correct(answer_id):
npoints = self.cmap[answer_id].get('npoints',1) # default to 1 point if correct

93
common/lib/capa/capa/responsetypes.py
View File

@@ -8,6 +8,7 @@ Used by capa_problem.py
'''
# standard library imports
import hashlib
import inspect
import json
import logging
@@ -16,9 +17,9 @@ import numpy
import random
import re
import requests
import time
import traceback
import abc
import time
# specific library imports
from calc import evaluator, UndefinedVariable
@@ -696,7 +697,10 @@ class SymbolicResponse(CustomResponse):
class CodeResponse(LoncapaResponse):
'''
Grade student code using an external server
Grade student code using an external server, called 'xqueue'
In contrast to ExternalResponse, CodeResponse has following behavior:
1) Goes through a queueing system
2) Does not do external request for 'get_answers'
'''
response_tag = 'coderesponse'
@@ -704,7 +708,7 @@ class CodeResponse(LoncapaResponse):
def setup_response(self):
xml = self.xml
self.url = xml.get('url') or "http://ec2-50-16-59-149.compute-1.amazonaws.com/xqueue/submit/" # FIXME -- hardcoded url
self.url = xml.get('url', "http://ec2-50-16-59-149.compute-1.amazonaws.com/xqueue/submit/") # FIXME -- hardcoded url
answer = xml.find('answer')
if answer is not None:
@@ -722,9 +726,27 @@ class CodeResponse(LoncapaResponse):
self.tests = xml.get('tests')
# Extract 'answer' and 'initial_display' from XML. Note that the code to be exec'ed here is:
# (1) Internal edX code, i.e. NOT student submissions, and
# (2) The code should only define the strings 'initial_display', 'answer', 'preamble', 'test_program'
# following the 6.01 problem definition convention
penv = {}
penv['__builtins__'] = globals()['__builtins__']
try:
exec(self.code,penv,penv)
except Exception as err:
log.error('Error in CodeResponse %s: Error in problem reference code' % err)
raise Exception(err)
try:
self.answer = penv['answer']
self.initial_display = penv['initial_display']
except Exception as err:
log.error("Error in CodeResponse %s: Problem reference code does not define 'answer' and/or 'initial_display' in <answer>...</answer>" % err)
raise Exception(err)
def get_score(self, student_answers):
idset = sorted(self.answer_ids)
try:
submission = [student_answers[k] for k in idset]
except Exception as err:
@@ -734,12 +756,16 @@ class CodeResponse(LoncapaResponse):
self.context.update({'submission': submission})
extra_payload = {'edX_student_response': json.dumps(submission)}
# Should do something -- like update the problem state -- based on the queue response
r = self._send_to_queue(extra_payload)
return CorrectMap()
r, queuekey = self._send_to_queue(extra_payload) # TODO: Perform checks on the xqueue response
def update_score(self, score_msg):
# Non-null CorrectMap['queuekey'] indicates that the problem has been submitted
cmap = CorrectMap()
for answer_id in idset:
cmap.set(answer_id, queuekey=queuekey, msg='Submitted to queue')
return cmap
def update_score(self, score_msg, oldcmap, queuekey):
# Parse 'score_msg' as XML
try:
rxml = etree.fromstring(score_msg)
@@ -749,7 +775,6 @@ class CodeResponse(LoncapaResponse):
# The following process is lifted directly from ExternalResponse
idset = sorted(self.answer_ids)
cmap = CorrectMap()
ad = rxml.find('awarddetail').text
admap = {'EXACT_ANS':'correct', # TODO: handle other loncapa responses
'WRONG_FORMAT': 'incorrect',
@@ -758,41 +783,41 @@ class CodeResponse(LoncapaResponse):
if ad in admap:
self.context['correct'][0] = admap[ad]
# create CorrectMap
for key in idset:
idx = idset.index(key)
msg = rxml.find('message').text.replace('&nbsp;','&#160;') if idx==0 else None
cmap.set(key, self.context['correct'][idx], msg=msg)
# Replace 'oldcmap' with new grading results if queuekey matches
# If queuekey does not match, we keep waiting for the score_msg that will match
for answer_id in idset:
if oldcmap.is_right_queuekey(answer_id, queuekey): # If answer_id is not queued, will return False
idx = idset.index(answer_id)
msg = rxml.find('message').text.replace('&nbsp;','&#160;') if idx==0 else None
oldcmap.set(answer_id, self.context['correct'][idx], msg=msg, queuekey=None) # Queuekey is consumed
else: # Queuekey does not match
log.debug('CodeResponse: queuekey %d does not match for answer_id=%s.' % (queuekey, answer_id))
return cmap
return oldcmap
# CodeResponse differentiates from ExternalResponse in the behavior of 'get_answers'. CodeResponse.get_answers
# does NOT require a queue submission, and the answer is computed (extracted from problem XML) locally.
def get_answers(self):
# Extract the CodeResponse answer from XML
penv = {}
penv['__builtins__'] = globals()['__builtins__']
try:
exec(self.code,penv,penv)
except Exception as err:
log.error('Error in CodeResponse %s: Error in problem reference code' % err)
raise Exception(err)
try:
ans = penv['answer']
except Exception as err:
log.error('Error in CodeResponse %s: Problem reference code does not define answer in <answer>...</answer>' % err)
raise Exception(err)
anshtml = '<font color="blue"><span class="code-answer"><br/><pre>%s</pre><br/></span></font>' % ans
anshtml = '<font color="blue"><span class="code-answer"><br/><pre>%s</pre><br/></span></font>' % self.answer
return dict(zip(self.answer_ids,[anshtml]))
def get_initial_display(self):
return dict(zip(self.answer_ids,[self.initial_display]))
# CodeResponse._send_to_queue implements the same interface as defined for ExternalResponse's 'get_score'
def _send_to_queue(self, extra_payload):
# Prepare payload
xmlstr = etree.tostring(self.xml, pretty_print=True)
header = { 'return_url': self.system.xqueue_callback_url }
header.update({'timestamp': time.time()})
payload = {'xqueue_header': json.dumps(header), # 'xqueue_header' should eventually be derived from xqueue.queue_common.HEADER_TAG or something similar
h = hashlib.md5()
if self.system is not None:
h.update(str(self.system.get('seed')))
h.update(str(time.time()))
queuekey = int(h.hexdigest(),16)
header.update({'queuekey': queuekey})
payload = {'xqueue_header': json.dumps(header), # TODO: 'xqueue_header' should eventually be derived from a config file
'xml': xmlstr,
'edX_cmd': 'get_score',
'edX_tests': self.tests,
@@ -808,7 +833,7 @@ class CodeResponse(LoncapaResponse):
log.error(msg)
raise Exception(msg)
return r
return r, queuekey
#-----------------------------------------------------------------------------

54
common/lib/xmodule/tests/__init__.py
View File

@@ -13,6 +13,7 @@ import numpy
import xmodule
import capa.calc as calc
import capa.capa_problem as lcp
from capa.correctmap import CorrectMap
from xmodule import graders, x_module
from xmodule.graders import Score, aggregate_scores
from xmodule.progress import Progress
@@ -271,6 +272,59 @@ class StringResponseWithHintTest(unittest.TestCase):
self.assertEquals(cmap.get_correctness('1_2_1'), 'incorrect')
self.assertTrue('St. Paul' in cmap.get_hint('1_2_1'))
class CodeResponseTest(unittest.TestCase):
'''
Test CodeResponse
'''
def test_update_score(self):
problem_file = os.path.dirname(__file__)+"/test_files/coderesponse.xml"
test_lcp = lcp.LoncapaProblem(open(problem_file).read(), '1', system=i4xs)
# CodeResponse requires internal CorrectMap state. Build it now in the 'queued' state
old_cmap = CorrectMap()
answer_ids = sorted(test_lcp.get_question_answers().keys())
numAnswers = len(answer_ids)
for i in range(numAnswers):
old_cmap.update(CorrectMap(answer_id=answer_ids[i], queuekey=1000+i))
# Message format inherited from ExternalResponse
correct_score_msg = "<edxgrade><awarddetail>EXACT_ANS</awarddetail><message>MESSAGE</message></edxgrade>"
incorrect_score_msg = "<edxgrade><awarddetail>WRONG_FORMAT</awarddetail><message>MESSAGE</message></edxgrade>"
xserver_msgs = {'correct': correct_score_msg,
'incorrect': incorrect_score_msg,
}
# Incorrect queuekey, state should not be updated
for correctness in ['correct', 'incorrect']:
test_lcp.correct_map = CorrectMap()
test_lcp.correct_map.update(old_cmap) # Deep copy
test_lcp.update_score(xserver_msgs[correctness], queuekey=0)
self.assertEquals(test_lcp.correct_map.get_dict(), old_cmap.get_dict()) # Deep comparison
for i in range(numAnswers):
self.assertTrue(test_lcp.correct_map.is_queued(answer_ids[i])) # Should be still queued, since message undelivered
# Correct queuekey, state should be updated
for correctness in ['correct', 'incorrect']:
for i in range(numAnswers): # Target specific answer_id's
test_lcp.correct_map = CorrectMap()
test_lcp.correct_map.update(old_cmap)
new_cmap = CorrectMap()
new_cmap.update(old_cmap)
new_cmap.set(answer_id=answer_ids[i], correctness=correctness, msg='MESSAGE', queuekey=None)
test_lcp.update_score(xserver_msgs[correctness], queuekey=1000+i)
self.assertEquals(test_lcp.correct_map.get_dict(), new_cmap.get_dict())
for j in range(numAnswers):
if j == i:
self.assertFalse(test_lcp.correct_map.is_queued(answer_ids[j])) # Should be dequeued, message delivered
else:
self.assertTrue(test_lcp.correct_map.is_queued(answer_ids[j])) # Should be queued, message undelivered
#-----------------------------------------------------------------------------
# Grading tests

101
common/lib/xmodule/tests/test_files/coderesponse.xml Normal file
View File

@@ -0,0 +1,101 @@
<problem>
<text>
<h2>Code response</h2>
<p>
</p>
<text>
Write a program to compute the square of a number
<coderesponse tests="repeat:2,generate">
<textbox rows="10" cols="70" mode="python"/>
<answer><![CDATA[
initial_display = """
def square(n):
"""
answer = """
def square(n):
return n**2
"""
preamble = """
import sys, time
"""
test_program = """
import random
import operator
def testSquare(n = None):
if n is None:
n = random.randint(2, 20)
print 'Test is: square(%d)'%n
return str(square(n))
def main():
f = os.fdopen(3,'w')
test = int(sys.argv[1])
rndlist = map(int,os.getenv('rndlist').split(','))
random.seed(rndlist[0])
if test == 1: f.write(testSquare(0))
elif test == 2: f.write(testSquare(1))
else: f.write(testSquare())
f.close()
main()
sys.exit(0)
"""
]]>
</answer>
</coderesponse>
</text>
<text>
Write a program to compute the cube of a number
<coderesponse tests="repeat:2,generate">
<textbox rows="10" cols="70" mode="python"/>
<answer><![CDATA[
initial_display = """
def cube(n):
"""
answer = """
def cube(n):
return n**3
"""
preamble = """
import sys, time
"""
test_program = """
import random
import operator
def testCube(n = None):
if n is None:
n = random.randint(2, 20)
print 'Test is: cube(%d)'%n
return str(cube(n))
def main():
f = os.fdopen(3,'w')
test = int(sys.argv[1])
rndlist = map(int,os.getenv('rndlist').split(','))
random.seed(rndlist[0])
if test == 1: f.write(testCube(0))
elif test == 2: f.write(testCube(1))
else: f.write(testCube())
f.close()
main()
sys.exit(0)
"""
]]>
</answer>
</coderesponse>
</text>
</text>
</problem>

15
common/lib/xmodule/xmodule/capa_module.py
View File

@@ -323,8 +323,18 @@ class CapaModule(XModule):
raise self.system.exception404
def update_score(self, get):
"""
Delivers grading response (e.g. from asynchronous code checking) to
the capa problem, so its score can be updated
'get' must have a field 'response' which is a string that contains the
grader's response
No ajax return is needed. Return empty dict.
"""
queuekey = get['queuekey']
score_msg = get['response']
self.lcp.update_score(score_msg)
self.lcp.update_score(score_msg, queuekey)
return dict() # No AJAX return is needed
@@ -424,7 +434,8 @@ class CapaModule(XModule):
if not correct_map.is_correct(answer_id):
success = 'incorrect'
# log this in the track_function
# NOTE: We are logging both full grading and queued-grading submissions. In the latter,
# 'success' will always be incorrect
event_info['correct_map'] = correct_map.get_dict()
event_info['success'] = success
self.system.track_function('save_problem_check', event_info)

21
lms/djangoapps/courseware/module_render.py
View File

@@ -4,8 +4,10 @@ import logging
from django.conf import settings
from django.http import Http404
from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt
from functools import wraps
from django.contrib.auth.models import User
from xmodule.modulestore.django import modulestore
from mitxmako.shortcuts import render_to_string
from models import StudentModule, StudentModuleCache
@@ -33,6 +35,8 @@ class I4xSystem(object):
Create a closure around the system environment.
ajax_url - the url where ajax calls to the encapsulating module go.
xqueue_callback_url - the url where external queueing system (e.g. for grading)
returns its response
track_function - function of (event_type, event), intended for logging
or otherwise tracking the event.
TODO: Not used, and has inconsistent args in different
@@ -208,7 +212,7 @@ def get_module(user, request, location, student_module_cache, position=None):
# Setup system context for module instance
ajax_url = settings.MITX_ROOT_URL + '/modx/' + descriptor.location.url() + '/'
xqueue_callback_url = settings.MITX_ROOT_URL + '/xqueue/' + user.username + '/' + descriptor.location.url() + '/'
xqueue_callback_url = settings.MITX_ROOT_URL + '/xqueue/' + str(user.id) + '/' + descriptor.location.url() + '/'
def _get_module(location):
(module, _, _, _) = get_module(user, request, location, student_module_cache, position)
@@ -324,11 +328,9 @@ def add_histogram(module):
module.get_html = get_html
return module
# THK: TEMPORARY BYPASS OF AUTH!
from django.views.decorators.csrf import csrf_exempt
from django.contrib.auth.models import User
# TODO: TEMPORARY BYPASS OF AUTH!
@csrf_exempt
def xqueue_callback(request, username, id, dispatch):
def xqueue_callback(request, userid, id, dispatch):
# Parse xqueue response
get = request.POST.copy()
try:
@@ -336,12 +338,9 @@ def xqueue_callback(request, username, id, dispatch):
except Exception as err:
msg = "Error in xqueue_callback %s: Invalid return format" % err
raise Exception(msg)
# Should proceed only when the request timestamp is more recent than problem timestamp
timestamp = header['timestamp']
# Retrieve target StudentModule
user = User.objects.get(username=username)
user = User.objects.get(id=userid)
student_module_cache = StudentModuleCache(user, modulestore().get_item(id))
instance, instance_module, shared_module, module_type = get_module(request.user, request, id, student_module_cache)
@@ -354,6 +353,10 @@ def xqueue_callback(request, username, id, dispatch):
oldgrade = instance_module.grade
old_instance_state = instance_module.state
# Transfer 'queuekey' from xqueue response header to 'get'. This is required to
# use the interface defined by 'handle_ajax'
get.update({'queuekey': header['queuekey']})
# We go through the "AJAX" path
# So far, the only dispatch from xqueue will be 'score_update'
try:

2
lms/urls.py
View File

@@ -95,7 +95,7 @@ if settings.COURSEWARE_ENABLED:
url(r'^masquerade/', include('masquerade.urls')),
url(r'^jumpto/(?P<probname>[^/]+)/$', 'courseware.views.jump_to'),
url(r'^modx/(?P<id>.*?)/(?P<dispatch>[^/]*)$', 'courseware.module_render.modx_dispatch'), #reset_problem'),
url(r'^xqueue/(?P<username>[^/]*)/(?P<id>.*?)/(?P<dispatch>[^/]*)$', 'courseware.module_render.xqueue_callback'),
url(r'^xqueue/(?P<userid>[^/]*)/(?P<id>.*?)/(?P<dispatch>[^/]*)$', 'courseware.module_render.xqueue_callback'),
url(r'^change_setting$', 'student.views.change_setting'),
url(r'^s/(?P<template>[^/]*)$', 'static_template_view.views.auth_index'),
# url(r'^course_info/$', 'student.views.courseinfo'),