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# Copyright (C) 2007-2010 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
import bzrlib.hooks
from bzrlib import transport
from bzrlib.tests import features
# SFTPTransport offers better performances but relies on paramiko, if paramiko
# is not available, we fallback to FtpTransport
if features.paramiko.available():
from bzrlib.tests import test_sftp_transport
from bzrlib.transport import sftp
_backing_scheme = 'sftp'
_backing_transport_class = sftp.SFTPTransport
_backing_test_class = test_sftp_transport.TestCaseWithSFTPServer
else:
from bzrlib.transport import ftp
from bzrlib.tests import test_ftp_transport
_backing_scheme = 'ftp'
_backing_transport_class = ftp.FtpTransport
_backing_test_class = test_ftp_transport.TestCaseWithFTPServer
from bzrlib.transport import (
ConnectedTransport,
register_transport,
register_urlparse_netloc_protocol,
unregister_transport,
_unregister_urlparse_netloc_protocol,
)
class TransportHooks(bzrlib.hooks.Hooks):
"""Dict-mapping hook name to a list of callables for transport hooks"""
def __init__(self):
super(TransportHooks, self).__init__()
# Invoked when the transport has just created a new connection.
# The api signature is (transport, connection, credentials)
self['_set_connection'] = []
_hooked_scheme = 'hooked'
def _change_scheme_in(url, actual, desired):
if not url.startswith(actual + '://'):
raise AssertionError('url "%r" does not start with "%r]"'
% (url, actual))
return desired + url[len(actual):]
class InstrumentedTransport(_backing_transport_class):
"""Instrumented transport class to test commands behavior"""
hooks = TransportHooks()
def __init__(self, base, _from_transport=None):
if not base.startswith(_hooked_scheme + '://'):
raise ValueError(base)
# We need to trick the backing transport class about the scheme used
# We'll do the reverse when we need to talk to the backing server
fake_base = _change_scheme_in(base, _hooked_scheme, _backing_scheme)
super(InstrumentedTransport, self).__init__(
fake_base, _from_transport=_from_transport)
# The following is needed to minimize the effects of our trick above
# while retaining the best compatibility.
self._scheme = _hooked_scheme
base = self._unsplit_url(self._scheme,
self._user, self._password,
self._host, self._port,
self._path)
super(ConnectedTransport, self).__init__(base)
class ConnectionHookedTransport(InstrumentedTransport):
"""Transport instrumented to inspect connections"""
def _set_connection(self, connection, credentials):
"""Called when a new connection is created """
super(ConnectionHookedTransport, self)._set_connection(connection,
credentials)
for hook in self.hooks['_set_connection']:
hook(self, connection, credentials)
class TestCaseWithConnectionHookedTransport(_backing_test_class):
def setUp(self):
register_urlparse_netloc_protocol(_hooked_scheme)
register_transport(_hooked_scheme, ConnectionHookedTransport)
self.addCleanup(unregister_transport, _hooked_scheme,
ConnectionHookedTransport)
self.addCleanup(_unregister_urlparse_netloc_protocol, _hooked_scheme)
super(TestCaseWithConnectionHookedTransport, self).setUp()
self.reset_connections()
# Add the 'hooked' url to the permitted url list.
# XXX: See TestCase.start_server. This whole module shouldn't need to
# exist - a bug has been filed on that. once its cleanedup/removed, the
# standard test support code will work and permit the server url
# correctly.
url = self.get_url()
t = transport.get_transport(url)
if t.base.endswith('work/'):
t = t.clone('../..')
self.permit_url(t.base)
def get_url(self, relpath=None):
super_self = super(TestCaseWithConnectionHookedTransport, self)
url = super_self.get_url(relpath)
# Replace the backing scheme by our own (see
# InstrumentedTransport.__init__)
url = _change_scheme_in(url, _backing_scheme, _hooked_scheme)
return url
def start_logging_connections(self):
self.overrideAttr(InstrumentedTransport, 'hooks', TransportHooks())
# We preserved the hooks class attribute. Now we install our hook.
ConnectionHookedTransport.hooks.install_named_hook(
'_set_connection', self._collect_connection, None)
def reset_connections(self):
self.connections = []
def _collect_connection(self, transport, connection, credentials):
# Note: uncomment the following line and use 'bt' under pdb, that will
# identify all the connections made including the extraneous ones.
# import pdb; pdb.set_trace()
self.connections.append(connection)
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