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298 lines
12 KiB
Python
298 lines
12 KiB
Python
#
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# Copyright (c) 2009-2015 Tom Keffer <tkeffer@gmail.com>
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#
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# See the file LICENSE.txt for your full rights.
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#
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"""For uploading files to a remove server via FTP"""
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from __future__ import with_statement
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import os
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import sys
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import ftplib
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import cPickle
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import time
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import syslog
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class FtpUpload(object):
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"""Uploads a directory and all its descendants to a remote server.
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Keeps track of when a file was last uploaded, so it is uploaded only
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if its modification time is newer."""
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def __init__(self, server,
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user, password,
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local_root, remote_root,
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port = 21,
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name = "FTP",
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passive = True,
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max_tries = 3,
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secure = False,
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debug = 0):
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"""Initialize an instance of FtpUpload.
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After initializing, call method run() to perform the upload.
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server: The remote server to which the files are to be uploaded.
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user,
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password : The user name and password that are to be used.
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name: A unique name to be given for this FTP session. This allows more
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than one session to be uploading from the same local directory. [Optional.
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Default is 'FTP'.]
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passive: True to use passive mode; False to use active mode. [Optional.
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Default is True (passive mode)]
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max_tries: How many times to try creating a directory or uploading
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a file before giving up [Optional. Default is 3]
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secure: Set to True to attempt an FTP over TLS (FTPS) session.
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debug: Set to 1 for extra debug information, 0 otherwise.
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"""
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self.server = server
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self.user = user
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self.password = password
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self.local_root = os.path.normpath(local_root)
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self.remote_root = os.path.normpath(remote_root)
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self.port = port
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self.name = name
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self.passive = passive
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self.max_tries = max_tries
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self.secure = secure
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self.debug = debug
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def run(self):
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"""Perform the actual upload.
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returns: the number of files uploaded."""
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if self.secure:
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try:
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FTPClass = ftplib.FTP_TLS
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except AttributeError:
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FTPClass = ftplib.FTP
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syslog.syslog(syslog.LOG_DEBUG, "ftpupload: Your version of Python does not support FTPS. Using insecure connection.")
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self.secure = False
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else:
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FTPClass = ftplib.FTP
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# Get the timestamp and members of the last upload:
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(timestamp, fileset) = self.getLastUpload()
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n_uploaded = 0
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# Try to connect to the ftp server up to max_tries times:
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try:
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if self.secure:
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syslog.syslog(syslog.LOG_DEBUG, "ftpupload: Attempting secure connection to %s" % self.server)
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else:
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syslog.syslog(syslog.LOG_DEBUG, "ftpupload: Attempting connection to %s" % self.server)
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for count in range(self.max_tries):
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try:
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ftp_server = FTPClass()
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ftp_server.connect(self.server, self.port)
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if self.debug:
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ftp_server.set_debuglevel(self.debug)
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ftp_server.login(self.user, self.password)
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ftp_server.set_pasv(self.passive)
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if self.secure:
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ftp_server.prot_p()
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syslog.syslog(syslog.LOG_DEBUG, "ftpupload: Secure connection to %s" % self.server)
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else:
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syslog.syslog(syslog.LOG_DEBUG, "ftpupload: Connected to %s" % self.server)
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break
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except ftplib.all_errors, e:
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syslog.syslog(syslog.LOG_NOTICE, "ftpupload: Unable to connect or log into server : %s" % e)
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else:
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# This is executed only if the loop terminates naturally (without a break statement),
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# meaning the ftp connection failed max_tries times. Abandon ftp upload
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syslog.syslog(syslog.LOG_CRIT,
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"ftpupload: Attempted %d times to connect to server %s. Giving up." %
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(self.max_tries, self.server))
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return n_uploaded
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# Walk the local directory structure
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for (dirpath, unused_dirnames, filenames) in os.walk(self.local_root):
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# Strip out the common local root directory. What is left
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# will be the relative directory both locally and remotely.
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local_rel_dir_path = dirpath.replace(self.local_root, '.')
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if self._skipThisDir(local_rel_dir_path):
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continue
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# This is the absolute path to the remote directory:
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remote_dir_path = os.path.normpath(os.path.join(self.remote_root, local_rel_dir_path))
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# Make the remote directory if necessary:
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self._make_remote_dir(ftp_server, remote_dir_path)
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# Now iterate over all members of the local directory:
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for filename in filenames:
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full_local_path = os.path.join(dirpath, filename)
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# See if this file can be skipped:
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if self._skipThisFile(timestamp, fileset, full_local_path):
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continue
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full_remote_path = os.path.join(remote_dir_path, filename)
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STOR_cmd = "STOR %s" % full_remote_path
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# Retry up to max_tries times:
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for count in range(self.max_tries):
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try:
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# If we have to retry, we should probably reopen the file as well.
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# Hence, the open is in the inner loop:
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fd = open(full_local_path, "r")
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ftp_server.storbinary(STOR_cmd, fd)
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except ftplib.all_errors, e:
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# Unsuccessful. Log it and go around again.
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syslog.syslog(syslog.LOG_ERR, "ftpupload: Attempt #%d. Failed uploading %s to %s. Reason: %s" %
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(count+1, full_remote_path, self.server, e))
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ftp_server.set_pasv(self.passive)
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else:
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# Success. Log it, break out of the loop
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n_uploaded += 1
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fileset.add(full_local_path)
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syslog.syslog(syslog.LOG_DEBUG, "ftpupload: Uploaded file %s" % full_remote_path)
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break
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finally:
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# This is always executed on every loop. Close the file.
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try:
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fd.close()
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except:
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pass
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else:
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# This is executed only if the loop terminates naturally (without a break statement),
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# meaning the upload failed max_tries times. Log it, move on to the next file.
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syslog.syslog(syslog.LOG_ERR, "ftpupload: Failed to upload file %s" % full_remote_path)
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finally:
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try:
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ftp_server.quit()
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except:
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pass
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timestamp = time.time()
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self.saveLastUpload(timestamp, fileset)
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return n_uploaded
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def getLastUpload(self):
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"""Reads the time and members of the last upload from the local root"""
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timeStampFile = os.path.join(self.local_root, "#%s.last" % self.name )
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# If the file does not exist, an IOError exception will be raised.
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# If the file exists, but is truncated, an EOFError will be raised.
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# Either way, be prepared to catch it.
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try:
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with open(timeStampFile, "r") as f:
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timestamp = cPickle.load(f)
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fileset = cPickle.load(f)
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except (IOError, EOFError, cPickle.PickleError, AttributeError):
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timestamp = 0
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fileset = set()
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# Either the file does not exist, or it is garbled.
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# Either way, it's safe to remove it.
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try:
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os.remove(timeStampFile)
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except OSError:
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pass
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return (timestamp, fileset)
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def saveLastUpload(self, timestamp, fileset):
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"""Saves the time and members of the last upload in the local root."""
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timeStampFile = os.path.join(self.local_root, "#%s.last" % self.name )
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with open(timeStampFile, "w") as f:
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cPickle.dump(timestamp, f)
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cPickle.dump(fileset, f)
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def _make_remote_dir(self, ftp_server, remote_dir_path):
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"""Make a remote directory if necessary."""
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# Try to make the remote directory up max_tries times, then give up.
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for unused_count in range(self.max_tries):
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try:
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ftp_server.mkd(remote_dir_path)
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except ftplib.all_errors, e:
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# Got an exception. It might be because the remote directory already exists:
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if sys.exc_info()[0] is ftplib.error_perm:
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msg =str(e).strip()
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# If a directory already exists, some servers respond with a '550' ("Requested action not taken") code,
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# others with a '521' ("Access denied" or "Pathname already exists") code.
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if msg.startswith('550') or msg.startswith('521'):
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# Directory already exists
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return
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syslog.syslog(syslog.LOG_ERR, "ftpupload: Got error while attempting to make remote directory %s" % remote_dir_path)
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syslog.syslog(syslog.LOG_ERR, " **** Error: %s" % e)
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else:
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syslog.syslog(syslog.LOG_DEBUG, "ftpupload: Made directory %s" % remote_dir_path)
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return
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else:
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syslog.syslog(syslog.LOG_ERR, "ftpupload: Unable to create remote directory %s" % remote_dir_path)
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raise IOError, "Unable to create remote directory %s" % remote_dir_path
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def _skipThisDir(self, local_dir):
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return os.path.basename(local_dir) in ('.svn', 'CVS')
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def _skipThisFile(self, timestamp, fileset, full_local_path):
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filename = os.path.basename(full_local_path)
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if filename[-1] == '~' or filename[0] == '#' :
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return True
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if full_local_path not in fileset:
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return False
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if os.stat(full_local_path).st_mtime > timestamp:
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return False
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# Filename is in the set, and is up to date.
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return True
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if __name__ == '__main__':
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import weewx
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import socket
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import configobj
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weewx.debug = 1
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syslog.openlog('wee_ftpupload', syslog.LOG_PID|syslog.LOG_CONS)
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syslog.setlogmask(syslog.LOG_UPTO(syslog.LOG_DEBUG))
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if len(sys.argv) < 2 :
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print """Usage: ftpupload.py path-to-configuration-file [path-to-be-ftp'd]"""
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sys.exit(weewx.CMD_ERROR)
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try :
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config_dict = configobj.ConfigObj(sys.argv[1], file_error=True)
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except IOError:
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print "Unable to open configuration file ", sys.argv[1]
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raise
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if len(sys.argv) == 2:
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try:
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ftp_dir = os.path.join(config_dict['WEEWX_ROOT'],
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config_dict['StdReport']['HTML_ROOT'])
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except KeyError:
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print "No HTML_ROOT in configuration dictionary."
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sys.exit(1)
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else:
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ftp_dir = sys.argv[2]
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socket.setdefaulttimeout(10)
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ftp_upload = FtpUpload(config_dict['StdReport']['FTP']['server'],
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config_dict['StdReport']['FTP']['user'],
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config_dict['StdReport']['FTP']['password'],
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ftp_dir,
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config_dict['StdReport']['FTP']['path'],
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'FTP',
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config_dict['StdReport']['FTP'].as_bool('passive'),
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config_dict['StdReport']['FTP'].as_int('max_tries'))
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ftp_upload.run()
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