1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
# IVLE - Informatics Virtual Learning Environment
# Copyright (C) 2007-2008 The University of Melbourne
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# Module: TutorialService
# Author: Matt Giuca
# Date: 25/1/2008
# Provides the AJAX backend for the tutorial application.
# This allows several actions to be performed on the code the student has
# typed into one of the problem boxes.
# Calling syntax
# Path must be empty.
# The arguments determine what is to be done on this file.
# "problem" - The path to a problem file (including the .xml extension),
# relative to the subjects base directory.
# "code" - Full text of the student's code being submitted.
# "action". May be "test". (More to come).
# Returns a JSON response string indicating the results.
import os
import cjson
import test
import conf
def handle(req):
"""Handler for Ajax backend TutorialService app."""
# Set request attributes
req.write_html_head_foot = False # No HTML
if req.path != "":
req.throw_error(req.HTTP_BAD_REQUEST)
# Get all the arguments, if POST.
# Ignore arguments if not POST, since we aren't allowed to cause
# side-effects on the server.
fields = req.get_fieldstorage()
act = fields.getfirst('action')
problem = fields.getfirst('problem')
code = fields.getfirst('code')
if problem == None or code == None or act == None:
req.throw_error(req.HTTP_BAD_REQUEST)
act = act.value
problem = problem.value
code = code.value
if act == "test":
handle_test(req, problem, code, fields)
else:
req.throw_error(req.HTTP_BAD_REQUEST)
def handle_test(req, problem, code, fields):
"""Handles a test action."""
# First normalise the path
problem = os.path.normpath(problem)
# Now if it begins with ".." or separator, then it's illegal
if problem.startswith("..") or problem.startswith(os.sep):
problemfile = None
else:
problemfile = os.path.join(conf.subjects_base, problem)
try:
problemfile = open(problemfile)
except (TypeError, IOError): # TypeError if problemfile == None
req.throw_error(req.HTTP_NOT_FOUND)
# Parse the file into a problem object using the test suite
problem_obj = test.parse_tutorial_file(problemfile)
problemfile.close()
# Run the test cases. Get the result back as a JSONable object.
# Return it.
test_results = problem_obj.run_tests(code)
req.write(cjson.encode(test_results))
|