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# Copyright (C) 2009, 2010 Canonical Ltd
#
# 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 Street, Fifth Floor, Boston, MA 02110-1301 USA
"""
FTP test server.
Based on pyftpdlib: http://code.google.com/p/pyftpdlib/
"""
import errno
import os
from pyftpdlib import ftpserver
import select
import threading
from bzrlib import (
osutils,
trace,
)
from bzrlib.tests import test_server
class AnonymousWithWriteAccessAuthorizer(ftpserver.DummyAuthorizer):
def _check_permissions(self, username, perm):
# Like base implementation but don't warn about write permissions
# assigned to anonymous, since that's exactly our purpose.
for p in perm:
if p not in self.read_perms + self.write_perms:
raise ftpserver.AuthorizerError('No such permission "%s"' %p)
class BzrConformingFS(ftpserver.AbstractedFS):
def chmod(self, path, mode):
return os.chmod(path, mode)
def listdir(self, path):
"""List the content of a directory."""
return [osutils.safe_utf8(s) for s in os.listdir(path)]
def fs2ftp(self, fspath):
p = ftpserver.AbstractedFS.fs2ftp(self, osutils.safe_unicode(fspath))
return osutils.safe_utf8(p)
def ftp2fs(self, ftppath):
p = osutils.safe_unicode(ftppath)
return ftpserver.AbstractedFS.ftp2fs(self, p)
class BzrConformingFTPHandler(ftpserver.FTPHandler):
abstracted_fs = BzrConformingFS
def __init__(self, conn, server):
ftpserver.FTPHandler.__init__(self, conn, server)
self.authorizer = server.authorizer
def ftp_SIZE(self, path):
# bzr is overly picky here, but we want to make the test suite pass
# first. This may need to be revisited -- vila 20090226
line = self.fs.fs2ftp(path)
if self.fs.isdir(self.fs.realpath(path)):
why = "%s is a directory" % line
self.log('FAIL SIZE "%s". %s.' % (line, why))
self.respond("550 %s." %why)
else:
ftpserver.FTPHandler.ftp_SIZE(self, path)
def ftp_NLST(self, path):
# bzr is overly picky here, but we want to make the test suite pass
# first. This may need to be revisited -- vila 20090226
line = self.fs.fs2ftp(path)
if self.fs.isfile(self.fs.realpath(path)):
why = "Not a directory: %s" % line
self.log('FAIL NLST "%s". %s.' % (line, why))
self.respond("550 %s." %why)
else:
ftpserver.FTPHandler.ftp_NLST(self, path)
def ftp_SITE_CHMOD(self, line):
try:
mode, path = line.split(None, 1)
mode = int(mode, 8)
except ValueError:
# We catch both malformed line and malformed mode with the same
# ValueError.
self.respond("500 'SITE CHMOD %s': command not understood."
% line)
self.log('FAIL SITE CHMOD ' % line)
return
ftp_path = self.fs.fs2ftp(path)
try:
self.run_as_current_user(self.fs.chmod, self.fs.ftp2fs(path), mode)
except OSError, err:
why = ftpserver._strerror(err)
self.log('FAIL SITE CHMOD 0%03o "%s". %s.' % (mode, ftp_path, why))
self.respond('550 %s.' % why)
else:
self.log('OK SITE CHMOD 0%03o "%s".' % (mode, ftp_path))
self.respond('200 SITE CHMOD succesful.')
# pyftpdlib says to define SITE commands by declaring ftp_SITE_<CMD> methods,
# but fails to recognize them.
ftpserver.proto_cmds['SITE CHMOD'] = ftpserver._CommandProperty(
perm='w', # Best fit choice even if not exactly right (can be d, f or m too)
auth_needed=True, arg_needed=True, check_path=False,
help='Syntax: SITE CHMOD <SP> octal_mode_bits file-name (chmod file)',
)
# An empty password is valid, hence the arg is neither mandatory not forbidden
ftpserver.proto_cmds['PASS'].arg_needed = None
class ftp_server(ftpserver.FTPServer):
def __init__(self, address, handler, authorizer):
ftpserver.FTPServer.__init__(self, address, handler)
self.authorizer = authorizer
# Worth backporting upstream ?
self.addr = self.socket.getsockname()
class FTPTestServer(test_server.TestServer):
"""Common code for FTP server facilities."""
def __init__(self):
self._root = None
self._ftp_server = None
self._port = None
self._async_thread = None
# ftp server logs
self.logs = []
self._ftpd_running = False
def get_url(self):
"""Calculate an ftp url to this server."""
return 'ftp://anonymous@localhost:%d/' % (self._port)
def get_bogus_url(self):
"""Return a URL which cannot be connected to."""
return 'ftp://127.0.0.1:1/'
def log(self, message):
"""This is used by ftp_server to log connections, etc."""
self.logs.append(message)
def start_server(self, vfs_server=None):
if not (vfs_server is None or isinstance(vfs_server,
test_server.LocalURLServer)):
raise AssertionError(
"FTPServer currently assumes local transport, got %s"
% vfs_server)
self._root = os.getcwdu()
address = ('localhost', 0) # bind to a random port
authorizer = AnonymousWithWriteAccessAuthorizer()
authorizer.add_anonymous(self._root, perm='elradfmw')
self._ftp_server = ftp_server(address, BzrConformingFTPHandler,
authorizer)
# This is hacky as hell, will not work if we need two servers working
# at the same time, but that's the best we can do so far...
# FIXME: At least log and logline could be overriden in the handler ?
# -- vila 20090227
ftpserver.log = self.log
ftpserver.logline = self.log
ftpserver.logerror = self.log
self._port = self._ftp_server.socket.getsockname()[1]
self._ftpd_starting = threading.Lock()
self._ftpd_starting.acquire() # So it can be released by the server
self._ftpd_thread = threading.Thread(target=self._run_server,)
self._ftpd_thread.start()
# Wait for the server thread to start (i.e release the lock)
self._ftpd_starting.acquire()
self._ftpd_starting.release()
def stop_server(self):
"""See bzrlib.transport.Server.stop_server."""
# Tell the server to stop, but also close the server socket for tests
# that start the server but never initiate a connection. Closing the
# socket should be done first though, to avoid further connections.
self._ftp_server.close()
self._ftpd_running = False
self._ftpd_thread.join()
def _run_server(self):
"""Run the server until stop_server is called, shut it down properly then.
"""
self._ftpd_running = True
self._ftpd_starting.release()
while self._ftpd_running:
try:
self._ftp_server.serve_forever(timeout=0.1, count=1)
except select.error, e:
if e.args[0] != errno.EBADF:
raise
self._ftp_server.close_all(ignore_all=True)
def add_user(self, user, password):
"""Add a user with write access."""
self._ftp_server.authorizer.add_user(user, password, self._root,
perm='elradfmw')
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