从FTP获取文件并恢复网络设备

#coding=utf8
import paramiko
import sys
import time
import os
import re



class DoError(Exception):
    pass

class DoSsh(object):
    def __init__(self,host=None, username=None, password=None, port='22',private_key=None,is_windows=False,debug=False):
        self.ip = host
        self.user = username.encode('utf8')
        self.passwd = password.encode('utf8')
        self.port = int(port)
        self.slip = "\r\n".encode('utf8') if is_windows else "\n".encode('utf8')
        self.private_key=private_key
        self.client=None

    def login(self):
        try:
            client = paramiko.SSHClient()
            client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
            client.connect(self.ip, self.port, username=self.user, password=self.passwd, timeout=4)
            ssh_shell = client.invoke_shell()
            ssh_shell.keep_this = client
            self.client=ssh_shell
            ssh_shell.recv(1024)#获取连接信息
            test_connect = ssh_shell.recv(1024)#获取输入提示符
            if test_connect:
                return True,test_connect
        except Exception as e:
            return False, 'connect fail:{}'.format(e)

    def run(self,cmd):
        try:
            self.client.send(cmd+'\n')
            while not self.client.recv_ready():
                time.sleep(2)
            result=''
            res= self.client.recv(1024)
            # while res.strip():
            #     print res
            #     result = result + res
            #     if re.search(r'% Unrecognized|% Invalid|% Unknown| %Incomplete', res):
            #         return False
            #     res=self.client.recv(1024)
            return result
        except Exception as e:
            print e
            sys.exit(1)

    def close(self):
        try:
            print self.client.recv(1024)
            self.client.close()
            print "Close success"
        except Exception as err:
            print "Close Error: {}".format(err)
            sys.exit(1)


is_windows = True if os.name == 'nt' else False
now = time.strftime('%Y%m%d_%H%M%S')


def get_file(host, username, password,ftp_host,ftp_user,ftp_passwd,filename,directory, **kwargs):
    """支持cisco、 h3c 、huawei交换机的升级"""
    print host
    try:
        terminal = DoSsh(host=host, username=username, password=password, **kwargs)
        terminal.login()

        slip = "\r\n".encode('utf8') if is_windows else "\n".encode('utf8')
        out = terminal.run('ftp {}'.format(ftp_host))
        outs=out.split(slip)
        success=False
        for line in outs:
            if 'Connected to' in line:
                success=True
                break
        if not success:
            raise DoError(out)

        terminal.run('{}'.format(ftp_user))
        out = terminal.run('{}'.format(ftp_passwd))
        if 'Login successful' not in out:
            raise DoError('ftp user or password is error')

        if directory:
            out=terminal.run('cd {}'.format(directory))
            if 'Failed to change directory' in out:
                raise DoError(out)
        files = terminal.run('ls').split(slip)
        file_exists=False
        for file in files:
            if file.strip()==filename:
                file_exists=True
        if not file_exists:
            raise DoError( 'file not exists')
        out = terminal.run('get {}'.format(filename))
        if 'Overwrite it? [Y/N]:' in out:
            out=terminal.run('Y')
        print out
        terminal.run('bye')
        outs = terminal.run('dir /all').split(slip)
        for file in outs:
            if file.strip()==filename:
                #terminal.close()
                return True
        #terminal.close()
        return False

    except Exception as e:
        print e
        sys.exit(1)




if __name__ == '__main__':
    for ip in ips.split(','):
        if ip.strip():
            _tmp = get_file(ip.strip(), username, password, ftp_host,ftp_user,ftp_passwd,
                            filename,directory,is_windows=is_windows, debug=False)
            print '{}已升级'.format(ip.strip())