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# IVLE - Informatics Virtual Learning Environment
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# Copyright (C) 2007-2008 The University of Melbourne
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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# ZIP function wrappers. Provides easy methods for reading and writing zip
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# files for the purpose of the IVLE file browser.
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from common import studpath
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def make_zip(basepath, paths, file):
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"""Zips up a bunch of files on the student file space and writes it as
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basepath: Path relative to student home. All file paths will be made
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relative to this path, such that unzipping the file in this path will
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place the files back in their original places.
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paths: List of paths relative to basepath. These are the files to be
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zipped. All paths must be relative.
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file: Either a filename to write to, or a file-like object.
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Throws an OSError if one or more of the files cannot be read. This error
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will be thrown before any writing takes place.
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# First make sure all the files are valid
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newpaths = [] # Store tuples of (path, localpath)
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if len(path) == 0 or path[0] == os.sep:
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raise OSError("ZIP: Invalid path")
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# Relative to req.path
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relpath = os.path.join(basepath, path)
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_, r = studpath.url_to_local(relpath)
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raise OSError("ZIP: Invalid path")
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if not os.access(r, os.R_OK):
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raise OSError("ZIP: Could not access a file")
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newpaths.append((path, r))
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# Now open the zip file and write each path to it
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zip = zipfile.ZipFile(file, 'w')
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for (path, localpath) in newpaths:
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if os.path.isdir(localpath):
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# Walk the directory tree
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if len(localpath) > 0 and localpath[-1] != os.sep:
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raise OSError("ZIP: Could not access a file")
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for (dirpath, dirnames, filenames) in \
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os.walk(localpath, onerror=error):
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# Do not traverse into .svn directories
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dirnames.remove(".svn")
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# dirpath is local. Make arc_dirpath, relative to root
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arc_dirpath = os.path.join(path, dirpath[len(localpath):])
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for filename in filenames:
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zip.write(os.path.join(dirpath, filename),
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os.path.join(arc_dirpath, filename))
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zip.write(localpath, path)
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def unzip(path, file):
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"""Unzips a zip file (or file-like object) into a path.
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Note: All files go directly into the path. To avoid having a "zip bomb"
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situation, the zip file should have a single directory in it with all the
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zip = zipfile.ZipFile(file, 'r')
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# First test the zip file
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if zip.testzip() is not None:
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raise OSError("ZIP: Bad zip file")
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for filename in zip.namelist():
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# Work out the name of this file on the local file system, and make
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relpath = os.path.join(path, filename)
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_, localpath = studpath.url_to_local(relpath)
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if localpath is None:
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raise OSError("ZIP: Permission denied")
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# Create directory for filename
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(file_dir, _) = os.path.split(localpath)
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if not os.path.exists(file_dir):
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os.makedirs(file_dir)
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if filename.endswith(os.sep):
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# Is a directory make the directory
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if not os.path.exists(localpath):
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filedata = zip.read(filename)
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f = open(localpath, 'w')
added
removed
www/common/zip.py
