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
|
# IVLE
# 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
# App: File Service (AJAX server)
# Author: Matt Giuca
# Date: 9/1/2008
# This application is a wrapper around the library module fileservice.
# It can be configured to either call the library directly (in which case it
# behaves just like a regular application), or run it through the trampoline
# as a CGI app.
# It receives file handling instructions as requests. Performs actions on the
# student's workspace, and returns directory listings in JSON.
# See the documentation in lib/fileservice for details.
import os.path
import ivle.conf
import ivle.fileservice_lib
import ivle.interpret
import ivle.util
# handle_with_trampoline controls the way in which fileservice_lib is invoked.
# If False, it will simply be called directly by this handler.
# If True, the request will get marshalled into a CGI environment and the
# trampoline will invoke services/fileservices within the user's jail
# (SetUID'd to them). This script will then wrap the CGI environment in a
# replica of the original environment and handle it that way.
# This is a lot of overhead but it's the only way to properly ensure we are
# acting "as" that user and therefore we don't run into permissions problems.
# If set to True, it will be a lot more efficient, but there will be
# permissions issues unless all user's files are owned by the web server user.
HANDLE_WITH_TRAMPOLINE = True
fileservice_path = os.path.join(ivle.conf.share_path, 'services/fileservice')
def handle(req):
"""Handler for the File Services application."""
if len(req.path) == 0:
# If no path specified, default to the user's home directory
req.throw_redirect(ivle.util.make_path(os.path.join('fileservice',
req.user.login)))
if not HANDLE_WITH_TRAMPOLINE:
ivle.fileservice_lib.handle(req)
else:
interp_object = ivle.interpret.interpreter_objects["cgi-python"]
user_jail_dir = os.path.join(ivle.conf.jail_base, req.user.login)
ivle.interpret.interpret_file(req, req.user, user_jail_dir,
fileservice_path, interp_object, gentle=False)
|