python: 从远程服务器下载日志程序

本文提供了一种方法，该程序可实现抓取服务器的日志文件到本地，根据该程序可自行扩展对日志文件的自动化分析。常用于数据挖掘、生产维护等。
[python] 
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' 
 
运行：python getserverlog.py