我在Linux上多次运行以下代码,没有任何问题:
def test_ftp(ftpserver):
with FTP() as f:
f.connect("localhost", port=ftpserver.server_port)
f.login("M1", "bachmann")
f.cwd("/")
f.mkd("FOO")
f.quit()
在MacOS X中,同样的测试只能运行一次,之后它将会停止响应。重新启动机器是我能够重新运行测试的唯一方式。
ftpserver
是在 pytest-localftpserver 中定义的一个测试装置。我在这里发布此装置的代码,因为我怀疑它是错误的原因:
class MPFTPServer(multiprocessing.Process):
def __init__(self, username, password, ftp_home, ftp_port, **kwargs):
self._server = SimpleFTPServer(username, password, ftp_home, ftp_port)
self.server_home = self._server.ftp_home
self.anon_root = self._server.anon_root
self.server_port = self._server.ftp_port
super().__init__(**kwargs)
def run(self):
self._server.serve_forever()
def join(self):
self._server.stop()
def stop(self):
self._server.stop()
@pytest.fixture(scope="session", autouse=True)
def ftpserver(request):
"""The returned ``ftpsever`` provides a threaded instance of
``pyftpdlib.servers.FTPServer`` running on localhost.
...
"""
from pytest_localftpserver.plugin import MPFTPServer
ftp_user = os.getenv("FTP_USER", "fakeusername")
ftp_password = os.getenv("FTP_PASS", "qweqwe")
ftp_home = os.getenv("FTP_HOME", "")
ftp_port = int(os.getenv("FTP_PORT", 0))
server = MPFTPServer(ftp_user, ftp_password, ftp_home, ftp_port)
# This is a must in order to clear used sockets
server.daemon = True
server.start()
yield server
server.join()
你能告诉我为什么这段代码在Linux上可以重复运行,但在MacOSX上却不行吗?
更新
进一步调查后,我发现ftp服务器甚至无法启动,因此程序一直处于挂起状态。代码崩溃并显示以下消息:
Process MPFTPServer-1:
Traceback (most recent call last):
File "/opt/pkg/lib/python3.5/multiprocessing/process.py", line 249, in _bootstrap
self.run()
File "/Users/w/.virtualenvs/controller_config/lib/python3.5/site-packages/pytest_localftpserver/plugin.py", line 81, in run
self._server.serve_forever()
File "/Users/w/.virtualenvs/controller_config/lib/python3.5/site-packages/pyftpdlib/servers.py", line 207, in serve_forever
self.ioloop.loop(timeout, blocking)
File "/Users/w/.virtualenvs/controller_config/lib/python3.5/site-packages/pyftpdlib/ioloop.py", line 348, in loop
poll(soonest_timeout)
File "/Users/w/.virtualenvs/controller_config/lib/python3.5/site-packages/pyftpdlib/ioloop.py", line 709, in poll
timeout)
OSError: [Errno 9] Bad file descriptor