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# 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: download
# Author: Matt Giuca
# Date: 17/1/2008
# Serves content to the user (acting as a web server for students files).
# Unlike "serve", all content is served as a static file, and with the
# application/octet-stream mime type.
# Also can serve directories or multiple files, automatically zipping them up.
from common import (util, studpath, zip)
import conf
import functools
import os
import mimetypes
import StringIO
# Serve all files as application/octet-stream so the browser presents them as
# a download.
default_mimetype = "application/octet-stream"
zip_mimetype = "application/zip"
def handle(req):
"""Handler for the Download application which serves files for
download."""
# Make sure the logged in user has permission to see this file
studpath.authorize(req)
zipmode = False
zipbasepath = None
zipfilename = None
path = None
req.write_html_head_foot = False
# If any "path=" variables have been supplied, bring these into a list and
# make a zip file instead.
fields = req.get_fieldstorage()
paths = fields.getlist("path")
if len(paths) > 0:
zipmode = True
zipbasepath = req.path
zipfilename = os.path.basename(zipbasepath)
for i in range(0, len(paths)):
paths[i] = paths[i].value
else:
# Otherwise, just serve directly (unless it's a directory)
(_, path) = studpath.url_to_local(req.path)
if path is None:
# TODO: Nicer 404 message?
req.throw_error(req.HTTP_NOT_FOUND)
elif not os.access(path, os.R_OK):
req.throw_error(req.HTTP_NOT_FOUND)
# If it's a directory, serve as a zip file
if os.path.isdir(path):
zipmode = True
# Zip it from the perspective of its own parent.
# That way it will be a directory in the top level of the zip
# file.
path = req.path
if path[-1] == os.sep: path = path[:-1]
splitpath = path.rsplit(os.sep, 1)
if len(splitpath) == 1:
zipbasepath = ''
paths = [path]
else:
zipbasepath = splitpath[0]
paths = [splitpath[1]]
zipfilename = paths[0]
if zipmode:
req.content_type = zip_mimetype
# zipfilename is some filename. Strip trailing slash or extension,
# and add ".zip".
if zipfilename == '':
zipfilename = "files"
elif zipfilename[-1] == '/':
zipfilename = zipfilename[:-1]
elif '.' in zipfilename:
zipfilename = zipfilename[:zipfilename.rindex('.')]
zipfilename += ".zip"
req.headers_out["Content-Disposition"] = ("attachment; filename=" +
zipfilename)
zipfile = StringIO.StringIO()
zip.make_zip(zipbasepath, paths, zipfile,req)
req.write(zipfile.getvalue())
else:
req.content_type = default_mimetype
req.sendfile(path)
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