test_functional.py 文件源码

def test_max_connections(self):
        # Test FTPServer.max_cons attribute
        with self.server.lock:
            self.server.server.max_cons = 3
        self.client.quit()
        c1 = self.client_class()
        c2 = self.client_class()
        c3 = self.client_class()
        try:
            c1.connect(self.server.host, self.server.port)
            c2.connect(self.server.host, self.server.port)
            self.assertRaises(ftplib.error_temp, c3.connect, self.server.host,
                              self.server.port)
            # with passive data channel established
            c2.quit()
            c1.login(USER, PASSWD)
            c1.makepasv()
            self.assertRaises(ftplib.error_temp, c2.connect, self.server.host,
                              self.server.port)
            # with passive data socket waiting for connection
            c1.login(USER, PASSWD)
            c1.sendcmd('pasv')
            self.assertRaises(ftplib.error_temp, c2.connect, self.server.host,
                              self.server.port)
            # with active data channel established
            c1.login(USER, PASSWD)
            with contextlib.closing(c1.makeport()):
                self.assertRaises(
                    ftplib.error_temp, c2.connect, self.server.host,
                    self.server.port)
        finally:
            for c in (c1, c2, c3):
                try:
                    c.quit()
                except (socket.error, EOFError):  # already disconnected
                    c.close()