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[project @ Arch-1:robey@lag.net--2003-public%secsh--dev--1.0--patch-30] 

finish up client sftp support
added 'stat' to SFTPFile and SFTP, documented 'open' and 'listdir', and added
'rmdir', 'lstat', 'symlink', 'chmod', 'chown', 'utime', 'readlink'.

turned off ultra debugging now that the unit tests are all working.
This commit is contained in:
Robey Pointer 2004-03-08 17:50:49 +00:00
parent 9f6bbb6519
commit e5193fb23f
1 changed files with 208 additions and 2 deletions
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210
paramiko/sftp.py
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@ -100,7 +100,22 @@ class SFTPAttributes (object):
msg.add_string(val)
return
def _pythonize(self):
"create attributes named the way python's os.stat does it"
if hasattr(self, 'size'):
self.st_size = self.size
if hasattr(self, 'uid'):
self.st_uid = self.uid
if hasattr(self, 'gid'):
self.st_gid = self.gid
if hasattr(self, 'permissions'):
self.st_mode = self.permissions
if hasattr(self, 'atime'):
self.st_atime = self.atime
if hasattr(self, 'mtime'):
self.st_mtime = self.mtime
class SFTPError (Exception):
pass
@ -147,11 +162,27 @@ class SFTPFile (BufferedFile):
self._realpos = self._pos = self._get_size() + offset
self._rbuffer = self._wbuffer = ''
def stat(self):
"""
Retrieve information about this file from the remote system. This is
exactly like L{SFTP.stat}, except that it operates on an already-open
file.
@return: an object containing attributes about this file.
@rtype: SFTPAttributes
"""
t, msg = self.sftp._request(CMD_FSTAT, self.handle)
if t != CMD_ATTRS:
raise SFTPError('Expected attributes')
attr = SFTPAttributes(msg)
attr._pythonize()
return attr
class SFTP (object):
def __init__(self, sock):
self.sock = sock
self.ultra_debug = 1
self.ultra_debug = False
self.request_number = 1
if type(sock) is Channel:
self.logger = logging.getLogger('paramiko.chan.' + sock.get_name() + '.sftp')
@ -175,6 +206,16 @@ class SFTP (object):
from_transport = classmethod(from_transport)
def listdir(self, path):
"""
Return a list containing the names of the entries in the given C{path}.
The list is in arbitrary order. It does not include the special
entries C{'.'} and C{'..'} even if they are present in the folder.
@param path: path to list.
@type path: string
@return: list of filenames.
@rtype: list of string
"""
t, msg = self._request(CMD_OPENDIR, path)
if t != CMD_HANDLE:
raise SFTPError('Expected handle')
@ -200,6 +241,31 @@ class SFTP (object):
return filelist
def open(self, filename, mode='r', bufsize=-1):
"""
Open a file on the remote server. The arguments are the same as for
python's built-in C{open} (aka C{file}). A file-like object is
returned, which closely mimics the behavior of a normal python file
object.
The mode indicates how the file is to be opened: C{'r'} for reading,
C{'w'} for writing (truncating an existing file), C{'a'} for appending,
C{'r+'} for reading/writing, C{'w+'} for reading/writing (truncating an
existing file), C{'a+'} for reading/appending. The python C{'b'} flag
is ignored, since SSH treats all files as binary. The C{'U'} flag is
supported in a compatible way.
@param filename: name of the file to open.
@type filename: string
@param mode: mode (python-style) to open in.
@type mode: string
@param bufsize: desired buffering (-1 = default buffer size, 0 =
unbuffered, 1 = line buffered, >1 = requested buffer size).
@type bufsize: int
@return: a file object representing the open file.
@rtype: SFTPFile
@raise IOError: if the file could not be opened.
"""
imode = 0
if ('r' in mode) or ('+' in mode):
imode |= self._FXF_READ
@ -259,6 +325,146 @@ class SFTP (object):
attr.permissions = mode
self._request(CMD_MKDIR, path, attr)
def rmdir(self, path):
"""
Remove the folder named C{path}.
@param path: name of the folder to remove.
@type path: string
"""
self._request(CMD_RMDIR, path)
def stat(self, path):
"""
Retrieve information about a file on the remote system. The return
value is an object whose attributes correspond to the attributes of
python's C{stat} structure as returned by C{os.stat}, except that it
contains fewer fields. An SFTP server may return as much or as little
info as it wants, so the results may vary from server to server.
Unlike a python C{stat} object, the result may not be accessed as a
tuple. This is mostly due to the author's slack factor.
The fields supported are: C{st_mode}, C{st_size}, C{st_uid}, C{st_gid},
C{st_atime}, and C{st_mtime}.
@param path: the filename to stat.
@type path: string
@return: an object containing attributes about the given file.
@rtype: SFTPAttributes
"""
t, msg = self._request(CMD_STAT, path)
if t != CMD_ATTRS:
raise SFTPError('Expected attributes')
attr = SFTPAttributes(msg)
attr._pythonize()
return attr
def lstat(self, path):
"""
Retrieve information about a file on the remote system, without
following symbolic links (shortcuts). This otherwise behaves exactly
the same as L{stat}.
@param path: the filename to stat.
@type path: string
@return: an object containing attributes about the given file.
@rtype: SFTPAttributes
"""
t, msg = self._request(CMD_LSTAT, path)
if t != CMD_ATTRS:
raise SFTPError('Expected attributes')
attr = SFTPAttributes(msg)
attr._pythonize()
return attr
def symlink(self, source, dest):
"""
Create a symbolic link (shortcut) of the C{source} path at
C{destination}.
@param source: path of the original file.
@type source: string
@param dest: path of the newly created symlink.
@type dest: string
"""
self._request(CMD_SYMLINK, source, dest)
def chmod(self, path, mode):
"""
Change the mode (permissions) of a file. The permissions are
unix-style and identical to those used by python's C{os.chmod}
function.
@param path: path of the file to change the permissions of.
@type path: string
@param mode: new permissions.
@type mode: int
"""
attr = SFTPAttributes()
attr.permissions = mode
self._request(CMD_SETSTAT, path, attr)
def chown(self, path, uid, gid):
"""
Change the owner (C{uid}) and group (C{gid}) of a file. As with
python's C{os.chown} function, you must pass both arguments, so if you
only want to change one, use L{stat} first to retrieve the current
owner and group.
@param path: path of the file to change the owner and group of.
@type path: string
@param uid: new owner's uid
@type uid: int
@param gid: new group id
@type gid: int
"""
attr = SFTPAttributes()
attr.uid, attr.gid = uid, gid
self._request(CMD_SETSTAT, path, attr)
def utime(self, path, times):
"""
Set the access and modified times of the file specified by C{path}. If
C{times} is C{None}, then the file's access and modified times are set
to the current time. Otherwise, C{times} must be a 2-tuple of numbers,
of the form C{(atime, mtime)}, which is used to set the access and
modified times, respectively. This bizarre API is mimicked from python
for the sake of consistency -- I apologize.
@param path: path of the file to modify.
@type path: string
@param times: C{None} or a tuple of (access time, modified time) in
standard internet epoch time (seconds since 01 January 1970 GMT).
@type times: tuple of int
"""
if times is None:
times = (time.time(), time.time())
attr = SFTPAttributes()
attr.atime, attr.mtime = times
self._request(CMD_SETSTAT, path, attr)
def readlink(self, path):
"""
Return the target of a symbolic link (shortcut). You can use
L{symlink} to create these. The result may be either an absolute or
relative pathname.
@param path: path of the symbolic link file.
@type path: string
@return: target path.
@rtype: string
"""
t, msg = self._request(CMD_READLINK, path)
if t != CMD_NAME:
raise SFTPError('Expected name response')
count = msg.get_int()
if count == 0:
return None
if count != 1:
raise SFTPError('Readlink returned %d results' % count)
return msg.get_string()
### internals...