test_ftplib.py 文件源码

def test_data_connection(self):
        # clear text
        with self.client.transfercmd('list') as sock:
            self.assertNotIsInstance(sock, ssl.SSLSocket)
        self.assertEqual(self.client.voidresp(), "226 transfer complete")

        # secured, after PROT P
        self.client.prot_p()
        with self.client.transfercmd('list') as sock:
            self.assertIsInstance(sock, ssl.SSLSocket)
        self.assertEqual(self.client.voidresp(), "226 transfer complete")

        # PROT C is issued, the connection must be in cleartext again
        self.client.prot_c()
        with self.client.transfercmd('list') as sock:
            self.assertNotIsInstance(sock, ssl.SSLSocket)
        self.assertEqual(self.client.voidresp(), "226 transfer complete")