import os import sys import ftplib import socket ################################################################## # sign in the ftp server and download the log file. # 登陆生产服务器下载日志 ################################################################# def getServerLog(dir,fileName,host,userName,password):  if os.path.exists(fileName):  print '****the file '+ fileName +' has already exist! The file will be over writed'  #connect  try:  f=ftplib.FTP(host)  except (socket.error,socket.gaierror),e:  print '----ERROR:cannot reach '+host  print e  return False  #login  try:  f.login(user=userName,passwd=password)  except ftplib.error_perm ,e:  print '----ERROR:cannot login to server '+host  print e  f.quit()  return False  print '****Logged in as ' + userName + ' to server ' +host  #change folder  try:  f.cwd(dir)  except ftplib.error_perm,e:  print '----ERROR:cannot CD to %s on %s' % (dir,host)  print e  f.quit()  return False  print '**** changed to %s folder on %s' % (dir,host)  #get file  try:  f.retrbinary('RETR %s' % fileName,open(fileName,'wb').write)  except ftplib.error_perm,e:  print '----ERROR:cannot read file %s on %s' % (fileName,host)  print e  os.unlink(fileName)  return False  else:  print '****Downloaded '+ fileName +' from '+ host +' to '+os.getcwd()  f.quit()  return True if __name__ == "__main__":  getServerLog("/userhome/root/other/temp","a.out","10.10.10.10","root","password")  print '****done'