paramiko模塊(基於SSH用於鏈接遠程服務器)

paramiko模塊，基於SSH用於鏈接遠程服務器並執行相關操做

class SSHConnection(object):
    def __init__(self, host_dict):
        self.host = host_dict['host']
        self.port = host_dict['port']
        self.username = host_dict['username']
        self.pwd = host_dict['pwd']
        self.__k = None
 
    def connect(self):
        transport = paramiko.Transport((self.host,self.port))
        transport.connect(username=self.username,password=self.pwd)
        self.__transport = transport
 
    def close(self):
        self.__transport.close()
 
    def run_cmd(self, command):
        """
         執行shell命令,返回字典
         return {'color': 'red','res':error}或
         return {'color': 'green', 'res':res}
        :param command:
        :return:
        """
        ssh = paramiko.SSHClient()
        ssh._transport = self.__transport
        # 執行命令
        stdin, stdout, stderr = ssh.exec_command(command)
        # 獲取命令結果
        res = unicode_utils.to_str(stdout.read())
        # 獲取錯誤信息
        error = unicode_utils.to_str(stderr.read())
        # 若是有錯誤信息，返回error
        # 不然返回res
        if error.strip():
            return {'color':'red','res':error}
        else:
            return {'color': 'green', 'res':res}
 
    def upload(self,local_path, target_path):
        # 鏈接，上傳
        sftp = paramiko.SFTPClient.from_transport(self.__transport)
        # 將location.py 上傳至服務器 /tmp/test.py
        sftp.put(local_path, target_path, confirm=True)
        # print(os.stat(local_path).st_mode)
        # 增長權限
        # sftp.chmod(target_path, os.stat(local_path).st_mode)
        sftp.chmod(target_path, 0o755)  # 注意這裏的權限是八進制的，八進制須要使用0o做爲前綴
 
    def download(self,target_path, local_path):
        # 鏈接，下載
        sftp = paramiko.SFTPClient.from_transport(self.__transport)
        # 將location.py 下載至服務器 /tmp/test.py
        sftp.get(target_path, local_path)
 
    # 銷燬
    def __del__(self):
        self.close()
 
　　
#unicode_utils.py
def to_str(bytes_or_str):
    """
    把byte類型轉換爲str
    :param bytes_or_str:
    :return:
    """
    if isinstance(bytes_or_str, bytes):
        value = bytes_or_str.decode('utf-8')
    else:
        value = bytes_or_str
    return value