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Viewing changes to services/serveservice

  • Committer: me at id
  • Date: 2009-01-15 03:02:36 UTC
  • mto: This revision was merged to the branch mainline in revision 1090.
  • Revision ID: svn-v3-trunk0:2b9c9e99-6f39-0410-b283-7f802c844ae2:branches%2Fstorm:1150
ivle.makeuser.make_jail: Just take an ivle.database.User, rather than some
    attributes.

services/usrmgt-server: Give make_jail a User.

bin/ivle-remakeuser: Rewrite to use ivle.database.User.

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services/serveservice
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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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# Author: Thomas Conway, Will Grant
 
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# Script: serveservice
 
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# Author: Thomas Conway
 
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# Date:   6/3/2007
 
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# A CGI script for serving files.
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import mimetypes
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import os
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import sys
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import StringIO
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from optparse import OptionParser
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import cjson
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import urlparse
 
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from ivle import (cgirequest, studpath)
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from ivle import zip as zipmod
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import ivle.conf.app.server
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def determine_file_type(filename):
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    filetype = mimetypes.guess_type(filename)[0]
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    if filetype is None:
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         filetype = ivle.conf.mimetypes.default_mimetype
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    return filetype
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def throw_error(message, extra={}):
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    error = {'error': message}
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    error.update(extra)
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    print cjson.encode(error)
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    sys.exit(0)
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parser = OptionParser()
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parser.add_option('-d', '--download', dest='download', action='store_true',
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                  help='force download, not execution, of the paths')
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(options, args) = parser.parse_args()
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# Detect download mode. Download mode zips any multiple selection,
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# and does not execute CGI scripts.
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if options.download:
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    download = True
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    # paths is filled later.
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else:
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    download = False
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    assert len(args) == 1
 
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req = cgirequest.CGIRequest()
 
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req.install_error_handler()
 
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# Work out the parts of the URL
 
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url = urlparse.urlparse(req.path)
 
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querystr = url[4]
 
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urlpath = url[2]
 
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filename = studpath.url_to_jailpaths(urlpath)[2]
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default_mimetype = "application/octet-stream"
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zip_mimetype = "application/zip"
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zipmode = False
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zipbasepath = None
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zipfilename = None
 
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path = None
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# If multiple paths have been specified, zip them up.
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if len(args) > 1:
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    # Mangle the paths - we want the basename of their dirname in front.
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    paths = []
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    dir = os.path.dirname(args[0])
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    for path in args:
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        assert os.path.dirname(path) == dir
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        paths.append(os.path.join(os.path.basename(dir),
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                                  os.path.basename(path)))
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    dir = os.path.dirname(dir)
 
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# If any "path=" variables have been supplied, bring these into a list and
 
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# make a zip file instead.
 
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fields = req.get_fieldstorage()
 
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paths = fields.getlist("path")
 
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if len(paths) > 0:
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    zipmode = True
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    zipbasepath = dir
 
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    zipbasepath = filename
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    zipfilename = os.path.basename(zipbasepath)
 
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    #for i in range(0, len(paths)):
 
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        #paths[i] = paths[i].value
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else:
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    paths = args
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    filename = paths[0]
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    if not os.access(filename, os.F_OK):
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        # The given path doesn't exist. CGI lets us backtrack and put the path
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        # elements through which we pass into PATH_INFO, so we try that.
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        while not os.access(filename, os.F_OK):
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            filename, path_info_frag = os.path.split(filename)
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        # We now have a file that exists, but is it something that we're allowed
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        # to execute? If not, we should 404 anyway.
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        if determine_file_type(filename) not in ivle.conf.app.server.interpreters:
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            throw_error('not-found')
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    # If it's a directory, serve as a zip file
 
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    if filename is None:
 
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        req.throw_error(req.HTTP_NOT_FOUND,
 
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            "The path specified is invalid.")
 
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    elif not os.access(filename, os.R_OK):
 
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        req.throw_error(req.HTTP_NOT_FOUND,
 
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            "The specified file (%s) does not exist." % urlpath)
 
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     # If it's a directory, serve as a zip file
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    if os.path.isdir(filename):
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        if not download:
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            # Not giving a directory listing - this is visible to everyone.
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            throw_error('is-directory')
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        zipmode = True
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        # Zip it from the perspective of its own parent.
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        # That way it will be a directory in the top level of the zip
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        else:
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            zipbasepath = splitpath[0]
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            paths = [splitpath[1]]
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        zipfilename = filename
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    else:
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        if not download and \
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           determine_file_type(filename) in ivle.conf.app.server.interpreters:
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            throw_error('is-executable', {'path': filename})
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        if not download and (
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            (ivle.conf.app.server.blacklist_served_filetypes and \
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                determine_file_type(filename) in \
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                ivle.conf.app.server.served_filetypes_blacklist) or \
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            (ivle.conf.app.server.served_filetypes_whitelist and \
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                determine_file_type(filename) not in \
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                ivle.conf.app.server.served_filetypes_whitelist)):
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            throw_error('forbidden')
 
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        zipfilename = paths[0]
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if zipmode:
 
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    req.content_type = zip_mimetype
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    # zipfilename is some filename. Strip trailing slash or extension,
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    # and add ".zip".
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    if zipfilename == '':
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    elif '.' in zipfilename:
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        zipfilename = zipfilename[:zipfilename.rindex('.')]
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    zipfilename += ".zip"
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    #req.headers_out["Content-Disposition"] = ("attachment; filename=" +   
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    #    zipfilename) # TODO
 
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    req.headers_out["Content-Disposition"] = ("attachment; filename=" +   
 
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        zipfilename)
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    zipfile = StringIO.StringIO()
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    zipmod.make_zip(zipbasepath, paths, zipfile)
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    print cjson.encode({'type': zip_mimetype,
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                        'name': zipfilename})
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    stream = zipfile
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    stream.seek(0)
 
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    req.write(zipfile.getvalue())
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else:
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    print cjson.encode({'type': determine_file_type(filename),
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                        'name': os.path.basename(filename)})
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    stream = open(filename)
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next = stream.read(1024)
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while next:
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    sys.stdout.write(next)
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    next = stream.read(1024)
 
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    #req.content_type = default_mimetype
 
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    req.sendfile(filename)