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# Copyright (C) 2005, 2006, 2007, 2008, 2009 Canonical Ltd
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# Copyright (C) 2005 Robey Pointer <robey@lag.net>, Canonical Ltd
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""Implementation of Transport over SFTP, using paramiko."""
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# TODO: Remove the transport-based lock_read and lock_write methods. They'll
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# then raise TransportNotPossible, which will break remote access to any
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# formats which rely on OS-level locks. That should be fine as those formats
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# are pretty old, but these combinations may have to be removed from the test
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# suite. Those formats all date back to 0.7; so we should be able to remove
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# these methods when we officially drop support for those formats.
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from bzrlib.errors import (FileExists,
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NoSuchFile, PathNotChild,
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from bzrlib.errors import (FileExists,
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TransportNotPossible, NoSuchFile, NonRelativePath,
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from bzrlib.osutils import pathjoin, fancy_rename, getcwd
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from bzrlib.symbol_versioning import (
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from bzrlib.trace import mutter, warning
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from bzrlib.transport import (
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# Disable one particular warning that comes from paramiko in Python2.5; if
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# this is emitted at the wrong time it tends to cause spurious test failures
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# or at least noise in the test case::
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# [1770/7639 in 86s, 1 known failures, 50 skipped, 2 missing features]
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# test_permissions.TestSftpPermissions.test_new_files
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# /var/lib/python-support/python2.5/paramiko/message.py:226: DeprecationWarning: integer argument expected, got float
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# self.packet.write(struct.pack('>I', n))
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warnings.filterwarnings('ignore',
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'integer argument expected, got float',
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category=DeprecationWarning,
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module='paramiko.message')
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from bzrlib.config import config_dir
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from bzrlib.trace import mutter, warning, error
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from bzrlib.transport import Transport, register_transport
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except ImportError, e:
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raise ParamikoNotPresent(e)
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error('The SFTP transport requires paramiko.')
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from paramiko.sftp import (SFTP_FLAG_WRITE, SFTP_FLAG_CREATE,
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SFTP_FLAG_EXCL, SFTP_FLAG_TRUNC,
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CMD_HANDLE, CMD_OPEN)
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from paramiko.sftp_attr import SFTPAttributes
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from paramiko.sftp_file import SFTPFile
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_paramiko_version = getattr(paramiko, '__version_info__', (0, 0, 0))
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# don't use prefetch unless paramiko version >= 1.5.5 (there were bugs earlier)
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_default_do_prefetch = (_paramiko_version >= (1, 5, 5))
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from paramiko.sftp_client import SFTPClient
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if 'sftp' not in urlparse.uses_netloc: urlparse.uses_netloc.append('sftp')
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def _get_ssh_vendor():
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"""Find out what version of SSH is on the system."""
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if _ssh_vendor is not None:
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p = subprocess.Popen(['ssh', '-V'],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.PIPE)
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returncode = p.returncode
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stdout, stderr = p.communicate()
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if 'OpenSSH' in stderr:
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mutter('ssh implementation is OpenSSH')
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_ssh_vendor = 'openssh'
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elif 'SSH Secure Shell' in stderr:
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mutter('ssh implementation is SSH Corp.')
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if _ssh_vendor != 'none':
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# XXX: 20051123 jamesh
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# A check for putty's plink or lsh would go here.
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mutter('falling back to paramiko implementation')
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"""A socket-like object that talks to an ssh subprocess via pipes."""
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def __init__(self, hostname, port=None, user=None):
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vendor = _get_ssh_vendor()
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assert vendor in ['openssh', 'ssh']
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if vendor == 'openssh':
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'-oForwardX11=no', '-oForwardAgent=no',
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'-oClearAllForwardings=yes', '-oProtocol=2',
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'-oNoHostAuthenticationForLocalhost=yes']
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args.extend(['-p', str(port)])
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args.extend(['-l', user])
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args.extend(['-s', hostname, 'sftp'])
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elif vendor == 'ssh':
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args.extend(['-p', str(port)])
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args.extend(['-l', user])
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args.extend(['-s', 'sftp', hostname])
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self.proc = subprocess.Popen(args, close_fds=True,
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE)
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def send(self, data):
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return os.write(self.proc.stdin.fileno(), data)
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def recv(self, count):
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return os.read(self.proc.stdout.fileno(), count)
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self.proc.stdin.close()
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self.proc.stdout.close()
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# This is a weakref dictionary, so that we can reuse connections
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# that are still active. Long term, it might be nice to have some
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# sort of expiration policy, such as disconnect if inactive for
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# X seconds. But that requires a lot more fanciness.
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_connected_hosts = weakref.WeakValueDictionary()
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def load_host_keys():
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Load system host keys (probably doesn't work on windows) and any
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"discovered" keys from previous sessions.
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global SYSTEM_HOSTKEYS, BZR_HOSTKEYS
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SYSTEM_HOSTKEYS = paramiko.util.load_host_keys(os.path.expanduser('~/.ssh/known_hosts'))
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mutter('failed to load system host keys: ' + str(e))
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bzr_hostkey_path = os.path.join(config_dir(), 'ssh_host_keys')
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BZR_HOSTKEYS = paramiko.util.load_host_keys(bzr_hostkey_path)
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mutter('failed to load bzr host keys: ' + str(e))
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def save_host_keys():
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Save "discovered" host keys in $(config)/ssh_host_keys/.
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global SYSTEM_HOSTKEYS, BZR_HOSTKEYS
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bzr_hostkey_path = os.path.join(config_dir(), 'ssh_host_keys')
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if not os.path.isdir(config_dir()):
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os.mkdir(config_dir())
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f = open(bzr_hostkey_path, 'w')
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f.write('# SSH host keys collected by bzr\n')
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for hostname, keys in BZR_HOSTKEYS.iteritems():
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for keytype, key in keys.iteritems():
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f.write('%s %s %s\n' % (hostname, keytype, key.get_base64()))
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mutter('failed to save bzr host keys: ' + str(e))
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class SFTPTransportError (TransportError):
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class SFTPLock(object):
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"""This fakes a lock in a remote location.
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A present lock is indicated just by the existence of a file. This
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doesn't work well on all transports and they are only used in
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deprecated storage formats.
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"""This fakes a lock in a remote location."""
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__slots__ = ['path', 'lock_path', 'lock_file', 'transport']
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def __init__(self, path, transport):
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assert isinstance(transport, SFTPTransport)
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self.lock_file = None
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self.lock_path = path + '.write-lock'
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self.transport = transport
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# RBC 20060103 FIXME should we be using private methods here ?
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abspath = transport._remote_path(self.lock_path)
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self.lock_file = transport._sftp_open_exclusive(abspath)
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self.lock_file = transport._sftp_open_exclusive(self.lock_path)
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except FileExists:
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raise LockError('File %r already locked' % (self.path,))
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def __del__(self):
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"""Should this warn, or actually try to cleanup?"""
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if self.lock_file:
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warning("SFTPLock %r not explicitly unlocked" % (self.path,))
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warn("SFTPLock %r not explicitly unlocked" % (self.path,))
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def unlock(self):
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# What specific errors should we catch here?
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class _SFTPReadvHelper(object):
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"""A class to help with managing the state of a readv request."""
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# See _get_requests for an explanation.
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_max_request_size = 32768
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def __init__(self, original_offsets, relpath, _report_activity):
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"""Create a new readv helper.
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:param original_offsets: The original requests given by the caller of
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:param relpath: The name of the file (if known)
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:param _report_activity: A Transport._report_activity bound method,
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to be called as data arrives.
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self.original_offsets = list(original_offsets)
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self.relpath = relpath
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self._report_activity = _report_activity
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def _get_requests(self):
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"""Break up the offsets into individual requests over sftp.
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The SFTP spec only requires implementers to support 32kB requests. We
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could try something larger (openssh supports 64kB), but then we have to
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handle requests that fail.
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So instead, we just break up our maximum chunks into 32kB chunks, and
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asyncronously requests them.
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Newer versions of paramiko would do the chunking for us, but we want to
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start processing results right away, so we do it ourselves.
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# TODO: Because we issue async requests, we don't 'fudge' any extra
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# data. I'm not 100% sure that is the best choice.
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# The first thing we do, is to collapse the individual requests as much
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# as possible, so we don't issues requests <32kB
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sorted_offsets = sorted(self.original_offsets)
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coalesced = list(ConnectedTransport._coalesce_offsets(sorted_offsets,
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limit=0, fudge_factor=0))
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for c_offset in coalesced:
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start = c_offset.start
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size = c_offset.length
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# Break this up into 32kB requests
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next_size = min(size, self._max_request_size)
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requests.append((start, next_size))
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if 'sftp' in debug.debug_flags:
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mutter('SFTP.readv(%s) %s offsets => %s coalesced => %s requests',
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self.relpath, len(sorted_offsets), len(coalesced),
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def request_and_yield_offsets(self, fp):
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"""Request the data from the remote machine, yielding the results.
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:param fp: A Paramiko SFTPFile object that supports readv.
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:return: Yield the data requested by the original readv caller, one by
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requests = self._get_requests()
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offset_iter = iter(self.original_offsets)
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cur_offset, cur_size = offset_iter.next()
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# paramiko .readv() yields strings that are in the order of the requests
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# So we track the current request to know where the next data is
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# being returned from.
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# This is used to buffer chunks which we couldn't process yet
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# It is (start, end, data) tuples.
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# Create an 'unlimited' data stream, so we stop based on requests,
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# rather than just because the data stream ended. This lets us detect
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data_stream = itertools.chain(fp.readv(requests),
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itertools.repeat(None))
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for (start, length), data in itertools.izip(requests, data_stream):
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if cur_coalesced is not None:
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raise errors.ShortReadvError(self.relpath,
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start, length, len(data))
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if len(data) != length:
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raise errors.ShortReadvError(self.relpath,
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start, length, len(data))
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self._report_activity(length, 'read')
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# This is the first request, just buffer it
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buffered_data = [data]
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buffered_len = length
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elif start == last_end:
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# The data we are reading fits neatly on the previous
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# buffer, so this is all part of a larger coalesced range.
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buffered_data.append(data)
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buffered_len += length
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class SFTPTransport (Transport):
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Transport implementation for SFTP access.
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_do_prefetch = False # Right now Paramiko's prefetch support causes things to hang
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def __init__(self, base, clone_from=None):
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assert base.startswith('sftp://')
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self._parse_url(base)
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base = self._unparse_url()
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super(SFTPTransport, self).__init__(base)
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if clone_from is None:
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# use the same ssh connection, etc
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self._sftp = clone_from._sftp
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# super saves 'self.base'
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def should_cache(self):
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Return True if the data pulled across should be cached locally.
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def clone(self, offset=None):
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Return a new SFTPTransport with root at self.base + offset.
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We share the same SFTP session between such transports, because it's
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fairly expensive to set them up.
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return SFTPTransport(self.base, self)
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return SFTPTransport(self.abspath(offset), self)
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def abspath(self, relpath):
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Return the full url to the given relative path.
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@param relpath: the relative path or path components
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@type relpath: str or list
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return self._unparse_url(self._abspath(relpath))
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def _abspath(self, relpath):
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"""Return the absolute path segment without the SFTP URL."""
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# FIXME: share the common code across transports
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assert isinstance(relpath, basestring)
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relpath = [urllib.unquote(relpath)]
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basepath = self._path.split('/')
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if len(basepath) > 0 and basepath[-1] == '':
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basepath = basepath[:-1]
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if len(basepath) == 0:
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# In most filesystems, a request for the parent
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# of root, just returns root.
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# We have an 'interrupt' in the data stream. So we know we are
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# at a request boundary.
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# We haven't consumed the buffer so far, so put it into
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# data_chunks, and continue.
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buffered = ''.join(buffered_data)
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data_chunks.append((input_start, buffered))
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buffered_data = [data]
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buffered_len = length
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last_end = start + length
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if input_start == cur_offset and cur_size <= buffered_len:
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# Simplify the next steps a bit by transforming buffered_data
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# into a single string. We also have the nice property that
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# when there is only one string ''.join([x]) == x, so there is
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buffered = ''.join(buffered_data)
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# Clean out buffered data so that we keep memory
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# TODO: We *could* also consider the case where cur_offset is in
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# in the buffered range, even though it doesn't *start*
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# the buffered range. But for packs we pretty much always
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# read in order, so you won't get any extra data in the
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while (input_start == cur_offset
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and (buffered_offset + cur_size) <= buffered_len):
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# We've buffered enough data to process this request, spit it
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cur_data = buffered[buffered_offset:buffered_offset + cur_size]
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# move the direct pointer into our buffered data
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buffered_offset += cur_size
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# Move the start-of-buffer pointer
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input_start += cur_size
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# Yield the requested data
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yield cur_offset, cur_data
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cur_offset, cur_size = offset_iter.next()
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# at this point, we've consumed as much of buffered as we can,
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# so break off the portion that we consumed
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if buffered_offset == len(buffered_data):
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# No tail to leave behind
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buffered = buffered[buffered_offset:]
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buffered_data = [buffered]
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buffered_len = len(buffered)
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buffered = ''.join(buffered_data)
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data_chunks.append((input_start, buffered))
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if 'sftp' in debug.debug_flags:
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mutter('SFTP readv left with %d out-of-order bytes',
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sum(map(lambda x: len(x[1]), data_chunks)))
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# We've processed all the readv data, at this point, anything we
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# couldn't process is in data_chunks. This doesn't happen often, so
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# this code path isn't optimized
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# We use an interesting process for data_chunks
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# Specifically if we have "bisect_left([(start, len, entries)],
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# If start == qstart, then we get the specific node. Otherwise we
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# get the previous node
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idx = bisect.bisect_left(data_chunks, (cur_offset,))
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if idx < len(data_chunks) and data_chunks[idx][0] == cur_offset:
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# The data starts here
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data = data_chunks[idx][1][:cur_size]
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# The data is in a portion of a previous page
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sub_offset = cur_offset - data_chunks[idx][0]
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data = data_chunks[idx][1]
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data = data[sub_offset:sub_offset + cur_size]
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# We are missing the page where the data should be found,
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if len(data) != cur_size:
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raise AssertionError('We must have miscalulated.'
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' We expected %d bytes, but only found %d'
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% (cur_size, len(data)))
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yield cur_offset, data
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cur_offset, cur_size = offset_iter.next()
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class SFTPTransport(ConnectedTransport):
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"""Transport implementation for SFTP access."""
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_do_prefetch = _default_do_prefetch
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# TODO: jam 20060717 Conceivably these could be configurable, either
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# by auto-tuning at run-time, or by a configuration (per host??)
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# but the performance curve is pretty flat, so just going with
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# reasonable defaults.
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_max_readv_combine = 200
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# Having to round trip to the server means waiting for a response,
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# so it is better to download extra bytes.
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# 8KiB had good performance for both local and remote network operations
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_bytes_to_read_before_seek = 8192
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# The sftp spec says that implementations SHOULD allow reads
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# to be at least 32K. paramiko.readv() does an async request
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# for the chunks. So we need to keep it within a single request
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# size for paramiko <= 1.6.1. paramiko 1.6.2 will probably chop
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# up the request itself, rather than us having to worry about it
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_max_request_size = 32768
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def __init__(self, base, _from_transport=None):
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super(SFTPTransport, self).__init__(base,
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_from_transport=_from_transport)
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def _remote_path(self, relpath):
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"""Return the path to be passed along the sftp protocol for relpath.
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:param relpath: is a urlencoded string.
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relative = urlutils.unescape(relpath).encode('utf-8')
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remote_path = self._combine_paths(self._path, relative)
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# the initial slash should be removed from the path, and treated as a
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# homedir relative path (the path begins with a double slash if it is
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# absolute). see draft-ietf-secsh-scp-sftp-ssh-uri-03.txt
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# RBC 20060118 we are not using this as its too user hostile. instead
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# we are following lftp and using /~/foo to mean '~/foo'
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# vila--20070602 and leave absolute paths begin with a single slash.
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if remote_path.startswith('/~/'):
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remote_path = remote_path[3:]
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elif remote_path == '/~':
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def _create_connection(self, credentials=None):
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"""Create a new connection with the provided credentials.
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:param credentials: The credentials needed to establish the connection.
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:return: The created connection and its associated credentials.
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The credentials are only the password as it may have been entered
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interactively by the user and may be different from the one provided
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in base url at transport creation time.
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if credentials is None:
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password = self._password
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password = credentials
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vendor = ssh._get_ssh_vendor()
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auth = config.AuthenticationConfig()
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user = auth.get_user('ssh', self._host, self._port)
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connection = vendor.connect_sftp(self._user, password,
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self._host, self._port)
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return connection, (user, password)
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"""Ensures that a connection is established"""
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connection = self._get_connection()
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if connection is None:
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# First connection ever
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connection, credentials = self._create_connection()
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self._set_connection(connection, credentials)
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path = '/'.join(basepath)
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# could still be a "relative" path here, but relative on the sftp server
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def relpath(self, abspath):
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username, password, host, port, path = self._split_url(abspath)
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if (username != self._username or host != self._host or
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port != self._port or not path.startswith(self._path)):
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raise NonRelativePath('path %r is not under base URL %r'
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% (abspath, self.base))
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return path[pl:].lstrip('/')
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def has(self, relpath):
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Does the target location exist?
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self._get_sftp().stat(self._remote_path(relpath))
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self._sftp.stat(self._abspath(relpath))
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def get(self, relpath):
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"""Get the file at the given relative path.
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def get(self, relpath, decode=False):
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Get the file at the given relative path.
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:param relpath: The relative path to the file
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path = self._remote_path(relpath)
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f = self._get_sftp().file(path, mode='rb')
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if self._do_prefetch and (getattr(f, 'prefetch', None) is not None):
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path = self._abspath(relpath)
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f = self._sftp.file(path)
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if self._do_prefetch and hasattr(f, 'prefetch'):
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except (IOError, paramiko.SSHException), e:
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self._translate_io_exception(e, path, ': error retrieving',
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failure_exc=errors.ReadError)
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def get_bytes(self, relpath):
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# reimplement this here so that we can report how many bytes came back
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except (IOError, paramiko.SSHException), x:
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raise NoSuchFile('Error retrieving %s: %s' % (path, str(x)), x)
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def get_partial(self, relpath, start, length=None):
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Get just part of a file.
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:param relpath: Path to the file, relative to base
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:param start: The starting position to read from
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:param length: The length to read. A length of None indicates
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read to the end of the file.
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:return: A file-like object containing at least the specified bytes.
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Some implementations may return objects which can be read
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past this length, but this is not guaranteed.
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# TODO: implement get_partial_multi to help with knit support
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f = self.get(relpath)
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self._report_activity(len(bytes), 'read')
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def _readv(self, relpath, offsets):
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"""See Transport.readv()"""
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# We overload the default readv() because we want to use a file
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# that does not have prefetch enabled.
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# Also, if we have a new paramiko, it implements an async readv()
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path = self._remote_path(relpath)
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fp = self._get_sftp().file(path, mode='rb')
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readv = getattr(fp, 'readv', None)
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return self._sftp_readv(fp, offsets, relpath)
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if 'sftp' in debug.debug_flags:
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mutter('seek and read %s offsets', len(offsets))
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return self._seek_and_read(fp, offsets, relpath)
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except (IOError, paramiko.SSHException), e:
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self._translate_io_exception(e, path, ': error retrieving')
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def recommended_page_size(self):
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"""See Transport.recommended_page_size().
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For SFTP we suggest a large page size to reduce the overhead
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introduced by latency.
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def _sftp_readv(self, fp, offsets, relpath):
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"""Use the readv() member of fp to do async readv.
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Then read them using paramiko.readv(). paramiko.readv()
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does not support ranges > 64K, so it caps the request size, and
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just reads until it gets all the stuff it wants.
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helper = _SFTPReadvHelper(offsets, relpath, self._report_activity)
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return helper.request_and_yield_offsets(fp)
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def put_file(self, relpath, f, mode=None):
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Copy the file-like object into the location.
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if self._do_prefetch and hasattr(f, 'prefetch'):
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def put(self, relpath, f):
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Copy the file-like or string object into the location.
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:param relpath: Location to put the contents, relative to base.
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:param f: File-like object.
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:param mode: The final mode for the file
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:param f: File-like or string object.
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final_path = self._remote_path(relpath)
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return self._put(final_path, f, mode=mode)
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def _put(self, abspath, f, mode=None):
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"""Helper function so both put() and copy_abspaths can reuse the code"""
489
tmp_abspath = '%s.tmp.%.9f.%d.%d' % (abspath, time.time(),
342
final_path = self._abspath(relpath)
343
tmp_relpath = '%s.tmp.%.9f.%d.%d' % (relpath, time.time(),
490
344
os.getpid(), random.randint(0,0x7FFFFFFF))
491
fout = self._sftp_open_exclusive(tmp_abspath, mode=mode)
345
tmp_abspath = self._abspath(tmp_relpath)
346
fout = self._sftp_open_exclusive(tmp_relpath)
495
fout.set_pipelined(True)
496
length = self._pump(f, fout)
497
except (IOError, paramiko.SSHException), e:
498
self._translate_io_exception(e, tmp_abspath)
499
# XXX: This doesn't truly help like we would like it to.
500
# The problem is that openssh strips sticky bits. So while we
501
# can properly set group write permission, we lose the group
502
# sticky bit. So it is probably best to stop chmodding, and
503
# just tell users that they need to set the umask correctly.
504
# The attr.st_mode = mode, in _sftp_open_exclusive
505
# will handle when the user wants the final mode to be more
506
# restrictive. And then we avoid a round trip. Unless
507
# paramiko decides to expose an async chmod()
509
# This is designed to chmod() right before we close.
510
# Because we set_pipelined() earlier, theoretically we might
511
# avoid the round trip for fout.close()
513
self._get_sftp().chmod(tmp_abspath, mode)
516
self._rename_and_overwrite(tmp_abspath, abspath)
352
self._translate_io_exception(e, relpath)
353
except paramiko.SSHException, x:
354
raise SFTPTransportError('Unable to write file %r' % (relpath,), x)
518
355
except Exception, e:
519
356
# If we fail, try to clean up the temporary file
520
357
# before we throw the exception
521
358
# but don't let another exception mess things up
522
# Write out the traceback, because otherwise
523
# the catch and throw destroys it
525
mutter(traceback.format_exc())
529
self._get_sftp().remove(tmp_abspath)
531
# raise the saved except
533
# raise the original with its traceback if we can.
536
def _put_non_atomic_helper(self, relpath, writer, mode=None,
537
create_parent_dir=False,
539
abspath = self._remote_path(relpath)
541
# TODO: jam 20060816 paramiko doesn't publicly expose a way to
542
# set the file mode at create time. If it does, use it.
543
# But for now, we just chmod later anyway.
545
def _open_and_write_file():
546
"""Try to open the target file, raise error on failure"""
361
self._sftp.remove(tmp_abspath)
366
# sftp rename doesn't allow overwriting, so play tricks:
367
tmp_safety = 'bzr.tmp.%.9f.%d.%d' % (time.time(), os.getpid(), random.randint(0, 0x7FFFFFFF))
368
tmp_safety = self._abspath(tmp_safety)
370
self._sftp.rename(final_path, tmp_safety)
550
fout = self._get_sftp().file(abspath, mode='wb')
551
fout.set_pipelined(True)
553
except (paramiko.SSHException, IOError), e:
554
self._translate_io_exception(e, abspath,
557
# This is designed to chmod() right before we close.
558
# Because we set_pipelined() earlier, theoretically we might
559
# avoid the round trip for fout.close()
561
self._get_sftp().chmod(abspath, mode)
377
self._sftp.rename(tmp_abspath, final_path)
379
self._translate_io_exception(e, relpath)
380
except paramiko.SSHException, x:
381
raise SFTPTransportError('Unable to rename into file %r' % (path,), x)
566
if not create_parent_dir:
567
_open_and_write_file()
570
# Try error handling to create the parent directory if we need to
572
_open_and_write_file()
574
# Try to create the parent directory, and then go back to
576
parent_dir = os.path.dirname(abspath)
577
self._mkdir(parent_dir, dir_mode)
578
_open_and_write_file()
580
def put_file_non_atomic(self, relpath, f, mode=None,
581
create_parent_dir=False,
583
"""Copy the file-like object into the target location.
585
This function is not strictly safe to use. It is only meant to
586
be used when you already know that the target does not exist.
587
It is not safe, because it will open and truncate the remote
588
file. So there may be a time when the file has invalid contents.
590
:param relpath: The remote location to put the contents.
591
:param f: File-like object.
592
:param mode: Possible access permissions for new file.
593
None means do not set remote permissions.
594
:param create_parent_dir: If we cannot create the target file because
595
the parent directory does not exist, go ahead and
596
create it, and then try again.
600
self._put_non_atomic_helper(relpath, writer, mode=mode,
601
create_parent_dir=create_parent_dir,
604
def put_bytes_non_atomic(self, relpath, bytes, mode=None,
605
create_parent_dir=False,
609
self._put_non_atomic_helper(relpath, writer, mode=mode,
610
create_parent_dir=create_parent_dir,
387
self._sftp.unlink(tmp_safety)
389
self._sftp.rename(tmp_safety, final_path)
613
391
def iter_files_recursive(self):
614
392
"""Walk the relative paths of all files in this transport."""
615
393
queue = list(self.list_dir('.'))
617
relpath = queue.pop(0)
395
relpath = urllib.quote(queue.pop(0))
618
396
st = self.stat(relpath)
619
397
if stat.S_ISDIR(st.st_mode):
620
398
for i, basename in enumerate(self.list_dir(relpath)):
625
def _mkdir(self, abspath, mode=None):
631
self._get_sftp().mkdir(abspath, local_mode)
633
# chmod a dir through sftp will erase any sgid bit set
634
# on the server side. So, if the bit mode are already
635
# set, avoid the chmod. If the mode is not fine but
636
# the sgid bit is set, report a warning to the user
637
# with the umask fix.
638
stat = self._get_sftp().lstat(abspath)
639
mode = mode & 0777 # can't set special bits anyway
640
if mode != stat.st_mode & 0777:
641
if stat.st_mode & 06000:
642
warning('About to chmod %s over sftp, which will result'
643
' in its suid or sgid bits being cleared. If'
644
' you want to preserve those bits, change your '
645
' environment on the server to use umask 0%03o.'
646
% (abspath, 0777 - mode))
647
self._get_sftp().chmod(abspath, mode=mode)
648
except (paramiko.SSHException, IOError), e:
649
self._translate_io_exception(e, abspath, ': unable to mkdir',
650
failure_exc=FileExists)
652
def mkdir(self, relpath, mode=None):
403
def mkdir(self, relpath):
653
404
"""Create a directory at the given path."""
654
self._mkdir(self._remote_path(relpath), mode=mode)
656
def open_write_stream(self, relpath, mode=None):
657
"""See Transport.open_write_stream."""
658
# initialise the file to zero-length
659
# this is three round trips, but we don't use this
660
# api more than once per write_group at the moment so
661
# it is a tolerable overhead. Better would be to truncate
662
# the file after opening. RBC 20070805
663
self.put_bytes_non_atomic(relpath, "", mode)
664
abspath = self._remote_path(relpath)
665
# TODO: jam 20060816 paramiko doesn't publicly expose a way to
666
# set the file mode at create time. If it does, use it.
667
# But for now, we just chmod later anyway.
670
handle = self._get_sftp().file(abspath, mode='wb')
671
handle.set_pipelined(True)
672
except (paramiko.SSHException, IOError), e:
673
self._translate_io_exception(e, abspath,
675
_file_streams[self.abspath(relpath)] = handle
676
return FileFileStream(self, relpath, handle)
678
def _translate_io_exception(self, e, path, more_info='',
679
failure_exc=PathError):
680
"""Translate a paramiko or IOError into a friendlier exception.
682
:param e: The original exception
683
:param path: The path in question when the error is raised
684
:param more_info: Extra information that can be included,
685
such as what was going on
686
:param failure_exc: Paramiko has the super fun ability to raise completely
687
opaque errors that just set "e.args = ('Failure',)" with
689
If this parameter is set, it defines the exception
690
to raise in these cases.
406
path = self._abspath(relpath)
407
self._sftp.mkdir(path)
409
self._translate_io_exception(e, relpath)
410
except (IOError, paramiko.SSHException), x:
411
raise SFTPTransportError('Unable to mkdir %r' % (path,), x)
413
def _translate_io_exception(self, e, relpath):
692
414
# paramiko seems to generate detailless errors.
693
self._translate_error(e, path, raise_generic=False)
694
if getattr(e, 'args', None) is not None:
695
if (e.args == ('No such file or directory',) or
696
e.args == ('No such file',)):
697
raise NoSuchFile(path, str(e) + more_info)
698
if (e.args == ('mkdir failed',) or
699
e.args[0].startswith('syserr: File exists')):
700
raise FileExists(path, str(e) + more_info)
701
# strange but true, for the paramiko server.
702
if (e.args == ('Failure',)):
703
raise failure_exc(path, str(e) + more_info)
704
mutter('Raising exception with args %s', e.args)
705
if getattr(e, 'errno', None) is not None:
706
mutter('Raising exception with errno %s', e.errno)
415
if (e.errno == errno.ENOENT or
416
e.args == ('No such file or directory',) or
417
e.args == ('No such file',)):
418
raise NoSuchFile(relpath)
419
if (e.args == ('mkdir failed',)):
420
raise FileExists(relpath)
421
# strange but true, for the paramiko server.
422
if (e.args == ('Failure',)):
423
raise FileExists(relpath)
709
def append_file(self, relpath, f, mode=None):
426
def append(self, relpath, f):
711
428
Append the text in the file-like object into the final
715
path = self._remote_path(relpath)
716
fout = self._get_sftp().file(path, 'ab')
718
self._get_sftp().chmod(path, mode)
432
path = self._abspath(relpath)
433
fout = self._sftp.file(path, 'ab')
720
434
self._pump(f, fout)
722
except (IOError, paramiko.SSHException), e:
723
self._translate_io_exception(e, relpath, ': unable to append')
725
def rename(self, rel_from, rel_to):
726
"""Rename without special overwriting"""
728
self._get_sftp().rename(self._remote_path(rel_from),
729
self._remote_path(rel_to))
730
except (IOError, paramiko.SSHException), e:
731
self._translate_io_exception(e, rel_from,
732
': unable to rename to %r' % (rel_to))
734
def _rename_and_overwrite(self, abs_from, abs_to):
735
"""Do a fancy rename on the remote server.
737
Using the implementation provided by osutils.
740
sftp = self._get_sftp()
741
fancy_rename(abs_from, abs_to,
742
rename_func=sftp.rename,
743
unlink_func=sftp.remove)
744
except (IOError, paramiko.SSHException), e:
745
self._translate_io_exception(e, abs_from,
746
': unable to rename to %r' % (abs_to))
435
except (IOError, paramiko.SSHException), x:
436
raise SFTPTransportError('Unable to append file %r' % (path,), x)
438
def copy(self, rel_from, rel_to):
439
"""Copy the item at rel_from to the location at rel_to"""
440
path_from = self._abspath(rel_from)
441
path_to = self._abspath(rel_to)
442
self._copy_abspaths(path_from, path_to)
444
def _copy_abspaths(self, path_from, path_to):
445
"""Copy files given an absolute path
447
:param path_from: Path on remote server to read
448
:param path_to: Path on remote server to write
451
TODO: Should the destination location be atomically created?
452
This has not been specified
453
TODO: This should use some sort of remote copy, rather than
454
pulling the data locally, and then writing it remotely
457
fin = self._sftp.file(path_from, 'rb')
459
fout = self._sftp.file(path_to, 'wb')
461
fout.set_pipelined(True)
462
self._pump(fin, fout)
467
except (IOError, paramiko.SSHException), x:
468
raise SFTPTransportError('Unable to copy %r to %r' % (path_from, path_to), x)
470
def copy_to(self, relpaths, other, pb=None):
471
"""Copy a set of entries from self into another Transport.
473
:param relpaths: A list/generator of entries to be copied.
475
if isinstance(other, SFTPTransport) and other._sftp is self._sftp:
476
# Both from & to are on the same remote filesystem
477
# We can use a remote copy, instead of pulling locally, and pushing
479
total = self._get_total(relpaths)
481
for path in relpaths:
482
path_from = self._abspath(relpath)
483
path_to = other._abspath(relpath)
484
self._update_pb(pb, 'copy-to', count, total)
485
self._copy_abspaths(path_from, path_to)
489
return super(SFTPTransport, self).copy_to(relpaths, other, pb=pb)
491
# The dummy implementation just does a simple get + put
492
def copy_entry(path):
493
other.put(path, self.get(path))
495
return self._iterate_over(relpaths, copy_entry, pb, 'copy_to', expand=False)
748
497
def move(self, rel_from, rel_to):
749
498
"""Move the item at rel_from to the location at rel_to"""
750
path_from = self._remote_path(rel_from)
751
path_to = self._remote_path(rel_to)
752
self._rename_and_overwrite(path_from, path_to)
499
path_from = self._abspath(rel_from)
500
path_to = self._abspath(rel_to)
502
self._sftp.rename(path_from, path_to)
503
except (IOError, paramiko.SSHException), x:
504
raise SFTPTransportError('Unable to move %r to %r' % (path_from, path_to), x)
754
506
def delete(self, relpath):
755
507
"""Delete the item at relpath"""
756
path = self._remote_path(relpath)
508
path = self._abspath(relpath)
758
self._get_sftp().remove(path)
759
except (IOError, paramiko.SSHException), e:
760
self._translate_io_exception(e, path, ': unable to delete')
510
self._sftp.remove(path)
511
except (IOError, paramiko.SSHException), x:
512
raise SFTPTransportError('Unable to delete %r' % (path,), x)
762
def external_url(self):
763
"""See bzrlib.transport.Transport.external_url."""
764
# the external path for SFTP is the base
767
514
def listable(self):
768
515
"""Return True if this store supports listing."""
825
560
# that we have taken the lock.
826
561
return SFTPLock(relpath, self)
828
def _sftp_open_exclusive(self, abspath, mode=None):
564
def _unparse_url(self, path=None):
567
path = urllib.quote(path)
568
if path.startswith('/'):
569
path = '/%2F' + path[1:]
572
netloc = urllib.quote(self._host)
573
if self._username is not None:
574
netloc = '%s@%s' % (urllib.quote(self._username), netloc)
575
if self._port not in (None, 22):
576
netloc = '%s:%d' % (netloc, self._port)
578
return urlparse.urlunparse(('sftp', netloc, path, '', '', ''))
580
def _split_url(self, url):
581
if isinstance(url, unicode):
582
url = url.encode('utf-8')
583
(scheme, netloc, path, params,
584
query, fragment) = urlparse.urlparse(url, allow_fragments=False)
585
assert scheme == 'sftp'
586
username = password = host = port = None
588
username, host = netloc.split('@', 1)
590
username, password = username.split(':', 1)
591
password = urllib.unquote(password)
592
username = urllib.unquote(username)
597
host, port = host.rsplit(':', 1)
601
raise SFTPTransportError('%s: invalid port number' % port)
602
host = urllib.unquote(host)
604
path = urllib.unquote(path)
606
# the initial slash should be removed from the path, and treated
607
# as a homedir relative path (the path begins with a double slash
608
# if it is absolute).
609
# see draft-ietf-secsh-scp-sftp-ssh-uri-03.txt
610
if path.startswith('/'):
613
return (username, password, host, port, path)
615
def _parse_url(self, url):
616
(self._username, self._password,
617
self._host, self._port, self._path) = self._split_url(url)
618
if self._port is None:
621
def _sftp_connect(self):
622
"""Connect to the remote sftp server.
623
After this, self._sftp should have a valid connection (or
624
we raise an SFTPTransportError 'could not connect').
626
TODO: Raise a more reasonable ConnectionFailed exception
628
global _connected_hosts
630
idx = (self._host, self._port, self._username)
632
self._sftp = _connected_hosts[idx]
637
vendor = _get_ssh_vendor()
639
sock = SFTPSubprocess(self._host, self._port, self._username)
640
self._sftp = SFTPClient(sock)
642
self._paramiko_connect()
644
_connected_hosts[idx] = self._sftp
646
def _paramiko_connect(self):
647
global SYSTEM_HOSTKEYS, BZR_HOSTKEYS
652
t = paramiko.Transport((self._host, self._port))
654
except paramiko.SSHException:
655
raise SFTPTransportError('Unable to reach SSH host %s:%d' % (self._host, self._port))
657
server_key = t.get_remote_server_key()
658
server_key_hex = paramiko.util.hexify(server_key.get_fingerprint())
659
keytype = server_key.get_name()
660
if SYSTEM_HOSTKEYS.has_key(self._host) and SYSTEM_HOSTKEYS[self._host].has_key(keytype):
661
our_server_key = SYSTEM_HOSTKEYS[self._host][keytype]
662
our_server_key_hex = paramiko.util.hexify(our_server_key.get_fingerprint())
663
elif BZR_HOSTKEYS.has_key(self._host) and BZR_HOSTKEYS[self._host].has_key(keytype):
664
our_server_key = BZR_HOSTKEYS[self._host][keytype]
665
our_server_key_hex = paramiko.util.hexify(our_server_key.get_fingerprint())
667
warning('Adding %s host key for %s: %s' % (keytype, self._host, server_key_hex))
668
if not BZR_HOSTKEYS.has_key(self._host):
669
BZR_HOSTKEYS[self._host] = {}
670
BZR_HOSTKEYS[self._host][keytype] = server_key
671
our_server_key = server_key
672
our_server_key_hex = paramiko.util.hexify(our_server_key.get_fingerprint())
674
if server_key != our_server_key:
675
filename1 = os.path.expanduser('~/.ssh/known_hosts')
676
filename2 = os.path.join(config_dir(), 'ssh_host_keys')
677
raise SFTPTransportError('Host keys for %s do not match! %s != %s' % \
678
(self._host, our_server_key_hex, server_key_hex),
679
['Try editing %s or %s' % (filename1, filename2)])
681
self._sftp_auth(t, self._username or getpass.getuser(), self._host)
684
self._sftp = t.open_sftp_client()
685
except paramiko.SSHException:
686
raise BzrError('Unable to find path %s on SFTP server %s' % \
687
(self._path, self._host))
689
def _sftp_auth(self, transport, username, host):
690
agent = paramiko.Agent()
691
for key in agent.get_keys():
692
mutter('Trying SSH agent key %s' % paramiko.util.hexify(key.get_fingerprint()))
694
transport.auth_publickey(self._username, key)
696
except paramiko.SSHException, e:
699
# okay, try finding id_rsa or id_dss? (posix only)
700
if self._try_pkey_auth(transport, paramiko.RSAKey, 'id_rsa'):
702
if self._try_pkey_auth(transport, paramiko.DSSKey, 'id_dsa'):
707
transport.auth_password(self._username, self._password)
709
except paramiko.SSHException, e:
712
# give up and ask for a password
713
# FIXME: shouldn't be implementing UI this deep into bzrlib
714
enc = sys.stdout.encoding
715
password = getpass.getpass('SSH %s@%s password: ' %
716
(self._username.encode(enc, 'replace'), self._host.encode(enc, 'replace')))
718
transport.auth_password(self._username, password)
719
except paramiko.SSHException:
720
raise SFTPTransportError('Unable to authenticate to SSH host as %s@%s' % \
721
(self._username, self._host))
723
def _try_pkey_auth(self, transport, pkey_class, filename):
724
filename = os.path.expanduser('~/.ssh/' + filename)
726
key = pkey_class.from_private_key_file(filename)
727
transport.auth_publickey(self._username, key)
729
except paramiko.PasswordRequiredException:
730
# FIXME: shouldn't be implementing UI this deep into bzrlib
731
enc = sys.stdout.encoding
732
password = getpass.getpass('SSH %s password: ' %
733
(os.path.basename(filename).encode(enc, 'replace'),))
735
key = pkey_class.from_private_key_file(filename, password)
736
transport.auth_publickey(self._username, key)
738
except paramiko.SSHException:
739
mutter('SSH authentication via %s key failed.' % (os.path.basename(filename),))
740
except paramiko.SSHException:
741
mutter('SSH authentication via %s key failed.' % (os.path.basename(filename),))
746
def _sftp_open_exclusive(self, relpath):
829
747
"""Open a remote path exclusively.
831
749
SFTP supports O_EXCL (SFTP_FLAG_EXCL), which fails if
836
754
WARNING: This breaks the SFTPClient abstraction, so it
837
755
could easily break against an updated version of paramiko.
839
:param abspath: The remote absolute path where the file should be opened
840
:param mode: The mode permissions bits for the new file
757
:param relpath: The relative path, where the file should be opened
842
# TODO: jam 20060816 Paramiko >= 1.6.2 (probably earlier) supports
843
# using the 'x' flag to indicate SFTP_FLAG_EXCL.
844
# However, there is no way to set the permission mode at open
845
# time using the sftp_client.file() functionality.
846
path = self._get_sftp()._adjust_cwd(abspath)
847
# mutter('sftp abspath %s => %s', abspath, path)
759
path = self._sftp._adjust_cwd(self._abspath(relpath))
848
760
attr = SFTPAttributes()
851
omode = (SFTP_FLAG_WRITE | SFTP_FLAG_CREATE
761
mode = (SFTP_FLAG_WRITE | SFTP_FLAG_CREATE
852
762
| SFTP_FLAG_TRUNC | SFTP_FLAG_EXCL)
854
t, msg = self._get_sftp()._request(CMD_OPEN, path, omode, attr)
764
t, msg = self._sftp._request(CMD_OPEN, path, mode, attr)
855
765
if t != CMD_HANDLE:
856
raise TransportError('Expected an SFTP handle')
766
raise SFTPTransportError('Expected an SFTP handle')
857
767
handle = msg.get_string()
858
return SFTPFile(self._get_sftp(), handle, 'wb', -1)
859
except (paramiko.SSHException, IOError), e:
860
self._translate_io_exception(e, abspath, ': unable to open',
861
failure_exc=FileExists)
863
def _can_roundtrip_unix_modebits(self):
864
if sys.platform == 'win32':
870
# ------------- server test implementation --------------
873
from bzrlib.tests.stub_sftp import StubServer, StubSFTPServer
875
STUB_SERVER_KEY = """
876
-----BEGIN RSA PRIVATE KEY-----
877
MIICWgIBAAKBgQDTj1bqB4WmayWNPB+8jVSYpZYk80Ujvj680pOTh2bORBjbIAyz
878
oWGW+GUjzKxTiiPvVmxFgx5wdsFvF03v34lEVVhMpouqPAYQ15N37K/ir5XY+9m/
879
d8ufMCkjeXsQkKqFbAlQcnWMCRnOoPHS3I4vi6hmnDDeeYTSRvfLbW0fhwIBIwKB
880
gBIiOqZYaoqbeD9OS9z2K9KR2atlTxGxOJPXiP4ESqP3NVScWNwyZ3NXHpyrJLa0
881
EbVtzsQhLn6rF+TzXnOlcipFvjsem3iYzCpuChfGQ6SovTcOjHV9z+hnpXvQ/fon
882
soVRZY65wKnF7IAoUwTmJS9opqgrN6kRgCd3DASAMd1bAkEA96SBVWFt/fJBNJ9H
883
tYnBKZGw0VeHOYmVYbvMSstssn8un+pQpUm9vlG/bp7Oxd/m+b9KWEh2xPfv6zqU
884
avNwHwJBANqzGZa/EpzF4J8pGti7oIAPUIDGMtfIcmqNXVMckrmzQ2vTfqtkEZsA
885
4rE1IERRyiJQx6EJsz21wJmGV9WJQ5kCQQDwkS0uXqVdFzgHO6S++tjmjYcxwr3g
886
H0CoFYSgbddOT6miqRskOQF3DZVkJT3kyuBgU2zKygz52ukQZMqxCb1fAkASvuTv
887
qfpH87Qq5kQhNKdbbwbmd2NxlNabazPijWuphGTdW0VfJdWfklyS2Kr+iqrs/5wV
888
HhathJt636Eg7oIjAkA8ht3MQ+XSl9yIJIS8gVpbPxSw5OMfw0PjVE7tBdQruiSc
889
nvuQES5C9BMHjF39LZiGH1iLQy7FgdHyoP+eodI7
890
-----END RSA PRIVATE KEY-----
894
class SocketListener(threading.Thread):
896
def __init__(self, callback):
897
threading.Thread.__init__(self)
898
self._callback = callback
899
self._socket = socket.socket()
900
self._socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
901
self._socket.bind(('localhost', 0))
902
self._socket.listen(1)
903
self.port = self._socket.getsockname()[1]
904
self._stop_event = threading.Event()
907
# called from outside this thread
908
self._stop_event.set()
909
# use a timeout here, because if the test fails, the server thread may
910
# never notice the stop_event.
916
readable, writable_unused, exception_unused = \
917
select.select([self._socket], [], [], 0.1)
918
if self._stop_event.isSet():
920
if len(readable) == 0:
923
s, addr_unused = self._socket.accept()
924
# because the loopback socket is inline, and transports are
925
# never explicitly closed, best to launch a new thread.
926
threading.Thread(target=self._callback, args=(s,)).start()
927
except socket.error, x:
928
sys.excepthook(*sys.exc_info())
929
warning('Socket error during accept() within unit test server'
932
# probably a failed test; unit test thread will log the
934
sys.excepthook(*sys.exc_info())
935
warning('Exception from within unit test server thread: %r' %
939
class SocketDelay(object):
940
"""A socket decorator to make TCP appear slower.
942
This changes recv, send, and sendall to add a fixed latency to each python
943
call if a new roundtrip is detected. That is, when a recv is called and the
944
flag new_roundtrip is set, latency is charged. Every send and send_all
947
In addition every send, sendall and recv sleeps a bit per character send to
950
Not all methods are implemented, this is deliberate as this class is not a
951
replacement for the builtin sockets layer. fileno is not implemented to
952
prevent the proxy being bypassed.
956
_proxied_arguments = dict.fromkeys([
957
"close", "getpeername", "getsockname", "getsockopt", "gettimeout",
958
"setblocking", "setsockopt", "settimeout", "shutdown"])
960
def __init__(self, sock, latency, bandwidth=1.0,
963
:param bandwith: simulated bandwith (MegaBit)
964
:param really_sleep: If set to false, the SocketDelay will just
965
increase a counter, instead of calling time.sleep. This is useful for
966
unittesting the SocketDelay.
969
self.latency = latency
970
self.really_sleep = really_sleep
971
self.time_per_byte = 1 / (bandwidth / 8.0 * 1024 * 1024)
972
self.new_roundtrip = False
975
if self.really_sleep:
978
SocketDelay.simulated_time += s
980
def __getattr__(self, attr):
981
if attr in SocketDelay._proxied_arguments:
982
return getattr(self.sock, attr)
983
raise AttributeError("'SocketDelay' object has no attribute %r" %
987
return SocketDelay(self.sock.dup(), self.latency, self.time_per_byte,
990
def recv(self, *args):
991
data = self.sock.recv(*args)
992
if data and self.new_roundtrip:
993
self.new_roundtrip = False
994
self.sleep(self.latency)
995
self.sleep(len(data) * self.time_per_byte)
998
def sendall(self, data, flags=0):
999
if not self.new_roundtrip:
1000
self.new_roundtrip = True
1001
self.sleep(self.latency)
1002
self.sleep(len(data) * self.time_per_byte)
1003
return self.sock.sendall(data, flags)
1005
def send(self, data, flags=0):
1006
if not self.new_roundtrip:
1007
self.new_roundtrip = True
1008
self.sleep(self.latency)
1009
bytes_sent = self.sock.send(data, flags)
1010
self.sleep(bytes_sent * self.time_per_byte)
1014
class SFTPServer(Server):
1015
"""Common code for SFTP server facilities."""
1017
def __init__(self, server_interface=StubServer):
1018
self._original_vendor = None
1019
self._homedir = None
1020
self._server_homedir = None
1021
self._listener = None
1023
self._vendor = ssh.ParamikoVendor()
1024
self._server_interface = server_interface
1027
self.add_latency = 0
1029
def _get_sftp_url(self, path):
1030
"""Calculate an sftp url to this server for path."""
1031
return 'sftp://foo:bar@localhost:%d/%s' % (self._listener.port, path)
1033
def log(self, message):
1034
"""StubServer uses this to log when a new server is created."""
1035
self.logs.append(message)
1037
def _run_server_entry(self, sock):
1038
"""Entry point for all implementations of _run_server.
1040
If self.add_latency is > 0.000001 then sock is given a latency adding
1043
if self.add_latency > 0.000001:
1044
sock = SocketDelay(sock, self.add_latency)
1045
return self._run_server(sock)
1047
def _run_server(self, s):
1048
ssh_server = paramiko.Transport(s)
1049
key_file = pathjoin(self._homedir, 'test_rsa.key')
1050
f = open(key_file, 'w')
1051
f.write(STUB_SERVER_KEY)
1053
host_key = paramiko.RSAKey.from_private_key_file(key_file)
1054
ssh_server.add_server_key(host_key)
1055
server = self._server_interface(self)
1056
ssh_server.set_subsystem_handler('sftp', paramiko.SFTPServer,
1057
StubSFTPServer, root=self._root,
1058
home=self._server_homedir)
1059
event = threading.Event()
1060
ssh_server.start_server(event, server)
1063
def setUp(self, backing_server=None):
1064
# XXX: TODO: make sftpserver back onto backing_server rather than local
1066
if not (backing_server is None or
1067
isinstance(backing_server, local.LocalURLServer)):
1068
raise AssertionError(
1069
"backing_server should not be %r, because this can only serve the "
1070
"local current working directory." % (backing_server,))
1071
self._original_vendor = ssh._ssh_vendor_manager._cached_ssh_vendor
1072
ssh._ssh_vendor_manager._cached_ssh_vendor = self._vendor
1073
if sys.platform == 'win32':
1074
# Win32 needs to use the UNICODE api
1075
self._homedir = getcwd()
1077
# But Linux SFTP servers should just deal in bytestreams
1078
self._homedir = os.getcwd()
1079
if self._server_homedir is None:
1080
self._server_homedir = self._homedir
1082
if sys.platform == 'win32':
1084
self._listener = SocketListener(self._run_server_entry)
1085
self._listener.setDaemon(True)
1086
self._listener.start()
1089
"""See bzrlib.transport.Server.tearDown."""
1090
self._listener.stop()
1091
ssh._ssh_vendor_manager._cached_ssh_vendor = self._original_vendor
1093
def get_bogus_url(self):
1094
"""See bzrlib.transport.Server.get_bogus_url."""
1095
# this is chosen to try to prevent trouble with proxies, wierd dns, etc
1096
# we bind a random socket, so that we get a guaranteed unused port
1097
# we just never listen on that port
1099
s.bind(('localhost', 0))
1100
return 'sftp://%s:%s/' % s.getsockname()
1103
class SFTPFullAbsoluteServer(SFTPServer):
1104
"""A test server for sftp transports, using absolute urls and ssh."""
1107
"""See bzrlib.transport.Server.get_url."""
1108
homedir = self._homedir
1109
if sys.platform != 'win32':
1110
# Remove the initial '/' on all platforms but win32
1111
homedir = homedir[1:]
1112
return self._get_sftp_url(urlutils.escape(homedir))
1115
class SFTPServerWithoutSSH(SFTPServer):
1116
"""An SFTP server that uses a simple TCP socket pair rather than SSH."""
1119
super(SFTPServerWithoutSSH, self).__init__()
1120
self._vendor = ssh.LoopbackVendor()
1122
def _run_server(self, sock):
1123
# Re-import these as locals, so that they're still accessible during
1124
# interpreter shutdown (when all module globals get set to None, leading
1125
# to confusing errors like "'NoneType' object has no attribute 'error'".
1126
class FakeChannel(object):
1127
def get_transport(self):
1129
def get_log_channel(self):
1133
def get_hexdump(self):
1138
server = paramiko.SFTPServer(
1139
FakeChannel(), 'sftp', StubServer(self), StubSFTPServer,
1140
root=self._root, home=self._server_homedir)
1142
server.start_subsystem(
1143
'sftp', None, ssh.SocketAsChannelAdapter(sock))
1144
except socket.error, e:
1145
if (len(e.args) > 0) and (e.args[0] == errno.EPIPE):
1146
# it's okay for the client to disconnect abruptly
1147
# (bug in paramiko 1.6: it should absorb this exception)
1151
except Exception, e:
1152
# This typically seems to happen during interpreter shutdown, so
1153
# most of the useful ways to report this error are won't work.
1154
# Writing the exception type, and then the text of the exception,
1155
# seems to be the best we can do.
1157
sys.stderr.write('\nEXCEPTION %r: ' % (e.__class__,))
1158
sys.stderr.write('%s\n\n' % (e,))
1159
server.finish_subsystem()
1162
class SFTPAbsoluteServer(SFTPServerWithoutSSH):
1163
"""A test server for sftp transports, using absolute urls."""
1166
"""See bzrlib.transport.Server.get_url."""
1167
homedir = self._homedir
1168
if sys.platform != 'win32':
1169
# Remove the initial '/' on all platforms but win32
1170
homedir = homedir[1:]
1171
return self._get_sftp_url(urlutils.escape(homedir))
1174
class SFTPHomeDirServer(SFTPServerWithoutSSH):
1175
"""A test server for sftp transports, using homedir relative urls."""
1178
"""See bzrlib.transport.Server.get_url."""
1179
return self._get_sftp_url("~/")
1182
class SFTPSiblingAbsoluteServer(SFTPAbsoluteServer):
1183
"""A test server for sftp transports where only absolute paths will work.
1185
It does this by serving from a deeply-nested directory that doesn't exist.
1188
def setUp(self, backing_server=None):
1189
self._server_homedir = '/dev/noone/runs/tests/here'
1190
super(SFTPSiblingAbsoluteServer, self).setUp(backing_server)
1193
def get_test_permutations():
1194
"""Return the permutations to be used in testing."""
1195
return [(SFTPTransport, SFTPAbsoluteServer),
1196
(SFTPTransport, SFTPHomeDirServer),
1197
(SFTPTransport, SFTPSiblingAbsoluteServer),
768
return SFTPFile(self._sftp, handle, 'w', -1)
770
self._translate_io_exception(e, relpath)
771
except paramiko.SSHException, x:
772
raise SFTPTransportError('Unable to open file %r' % (path,), x)
added
removed
bzrlib/transport/sftp.py
