148 lines
6.0 KiB
Python
148 lines
6.0 KiB
Python
import datetime
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import ftplib
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import logging
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import io
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import os
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import pathlib
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##
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from . import _base
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_logger = logging.getLogger()
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class FTP(_base.BaseFetcher):
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type = 'ftp'
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def __init__(self, domain, port, path, dest, owner = None, mtime = False, offset = None, *args, **kwargs):
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super().__init__(domain, port, path, dest, owner = owner, mtime = mtime, offset = offset, *args, **kwargs)
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_logger.debug('Instantiated FTP fetcher')
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self.handler = ftplib.FTP(self.domain)
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_logger.debug('Configured handler for {0}'.format(self.domain))
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self.handler.port = self.port
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_logger.debug('Set port for {0} to {1}'.format(self.domain, self.port))
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self.connected = None
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def _connect(self):
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if not self.connected:
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self.handler.login()
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_logger.debug('Connected to {0}:{1} as Anonymous'.format(self.domain, self.port))
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self.connected = True
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return(None)
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def _disconnect(self):
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if self.connected:
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self.handler.close()
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_logger.debug('Disconnected from {0}:{1} as Anonymous'.format(self.domain, self.port))
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self.connected = False
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return(None)
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def _pathtuple(self, path):
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relpath = path.lstrip('/')
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relpath_stripped = str(pathlib.Path(relpath).relative_to(self.path))
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destdir = os.path.join(self.dest, os.path.dirname(relpath_stripped))
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destpath = os.path.join(self.dest, relpath_stripped)
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return((relpath, destdir, destpath))
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def _prepdir(self, destdir):
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os.makedirs(destdir, mode = 0o0755, exist_ok = True)
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_logger.debug('Created directory {0} (if it did not exist)'.format(destdir))
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if self.owner:
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os.chown(destdir, **self.owner)
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_logger.debug('Chowned {0} to {uid}:{gid}'.format(destdir, **self.owner))
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return()
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def fetch(self):
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def getter(path, relroot):
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_logger.debug('getter invoked with path={0}, relroot={1}'.format(path, relroot))
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if relroot == path:
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parentdir = path
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_logger.debug('relroot and path are the same')
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else:
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parentdir = relroot
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_logger.debug('relroot and path are not the same')
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_logger.debug('parentdir set to {0}'.format(parentdir))
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_logger.debug('Executing LS on {0}'.format(parentdir))
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for itemspec in self.handler.mlsd(parentdir):
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relpath, spec = itemspec
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if relpath in ('.', '..'):
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continue
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_logger.debug(('Parsing path ('
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'relroot: {0}, '
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'path: {1}, '
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'relpath: {2}) with spec {3}').format(relroot, path, relpath, itemspec))
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ptype = spec['type']
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newpath = os.path.join(parentdir, relpath)
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itemspec = (newpath, itemspec[1])
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if ptype.startswith('OS.unix=slink'):
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_logger.debug('Fetching symlink {0}'.format(parentdir))
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self.fetch_symlink(itemspec)
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elif ptype == 'dir':
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_logger.debug('Fetching dir {0}'.format(parentdir))
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self.fetch_dir(itemspec)
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_logger.debug('Recursing getter with relpath={0}, parentdir={1}'.format(relpath, parentdir))
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getter(relpath, newpath)
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elif ptype == 'file':
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_logger.debug('Fetching file {0}'.format(parentdir))
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self.fetch_file(itemspec)
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return(None)
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self._connect()
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getter(self.path, self.path)
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self._disconnect()
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return(None)
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def fetch_content(self, remote_filepath, mtime_only = False):
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self._connect()
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if mtime_only:
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directory, file = os.path.split(remote_filepath)
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parent = '/{0}'.format(directory.lstrip('/'))
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meta = self.handler.mlsd(parent)
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file_info = dict(meta)[file]
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tstmp = file_info['modify']
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content = datetime.datetime.strptime(tstmp, '%Y%m%d%H%M%S')
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else:
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buf = io.BytesIO()
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self.handler.retrbinary('RETR {0}'.format(remote_filepath), buf.write)
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self._disconnect()
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buf.seek(0, 0)
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content = buf.read()
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self._disconnect()
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return(content)
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def fetch_dir(self, pathspec):
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self._connect()
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# Relative to FTP root.
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relpath, destdir, destpath = self._pathtuple(pathspec[0])
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mode = int(pathspec[1]['unix.mode'], 8)
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os.makedirs(destpath, mode = mode, exist_ok = True)
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_logger.debug('Created directory {0} with mode {1} (if it did not exist)'.format(destpath, oct(mode)))
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if self.owner:
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os.chown(destpath, **self.owner)
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_logger.debug('Chowned {0} to {uid}:{gid}'.format(destpath, **self.owner))
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return(None)
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def fetch_file(self, pathspec):
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self._connect()
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relpath, destdir, destpath = self._pathtuple(pathspec[0])
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self._prepdir(destdir)
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with open(destpath, 'wb') as fh:
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self.handler.retrbinary('RETR {0}'.format(relpath), fh.write)
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_logger.debug('Created file {0}'.format(destpath))
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mode = int(pathspec[1]['unix.mode'], 8)
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os.chmod(destpath, mode)
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_logger.debug('Chmodded {0} to {1}'.format(destpath, oct(mode)))
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if self.owner:
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os.chown(destpath, **self.owner)
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_logger.debug('Chowned {0} to {uid}:{gid}'.format(destpath, **self.owner))
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return(None)
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def fetch_symlink(self, pathspec):
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relpath, destdir, destpath = self._pathtuple(pathspec[0])
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self._prepdir(destdir)
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# For symlinks, this is something like: OS.unix=slink:path/to/target
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target = pathspec[1]['type'].split(':', 1)[1]
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# We don't care if the target exists.
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os.symlink(target, destpath)
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_logger.debug('Created symlink {0} -> {1}'.format(destpath, target))
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return(None)
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