有没有一种系统调用可以返回端口是否可用?或者至少有一种常规方法可以做到这一点,而不会使进程成为不良公民?
目前我是这样做的:
def find_open_port(min_port, max_port):
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
for port in range(min_port, max_port):
if port > max_port:
raise IOError('Could not find a free port between {0} and {1}'.format(min_port, max_port))
try:
s.bind(('localhost', port))
return port
except socket.error as error:
if error.strerror == 'Address already in use':
continue
else:
raise error
呸!