我可以将多个服务器绑定到同一个 TCP 端口吗? [英] Can I bind multiple servers to the same TCP port?

问题描述

我希望在同一个端口上有多个服务器会导致问题.事实上，当我尝试在同一端口上启动两台服务器时，我希望它抛出异常.问题是，在同一个端口上启动多个服务器似乎很高兴.我可以让以下代码的许多实例正常运行，无一例外.

I would expect having multiple servers on the same port would cause problems. In fact I want it to throw an exception when I try to start two servers on the same port. The problem is, it seems more than happy to start multiple servers on the same port. I can have many instances of the following code running just fine with no exceptions.

import BaseHTTPServer
import SimpleHTTPServer
import sys

def main():
    try:
        server = BaseHTTPServer.HTTPServer(('127.0.0.1',5000), SimpleHTTPServer.SimpleHTTPRequestHandler)
        print "On port: " + str(server.socket.getsockname()[1])
    except Exception, e:
        print e
    server.serve_forever()

if __name__ == "__main__":
    main()

所有这些都声称在端口 5000 上.如果它试图使用一个已经被占用的端口，我怎样才能让它抛出异常?

All of which claim to be on port 5000. How can I get it to throw an exception if it tries to use a port that is already taken?

这是 Python 2.6.4

This is Python 2.6.4

编辑 2:http://www.youtube.com/watch?v=rVOG3JdbHAM&feature=youtu.be 因为人们似乎认为我所解释的不可能?或者我完全误解了人们.无论哪种方式，这个视频都应该清除它.我启动了两台服务器，它们都没有打印出任何异常.当我关闭第一个时，第二个开始工作.为什么会这样?我希望第二台服务器永远不会启动并打印异常.这不是应该发生的事情吗?

Edit 2: http://www.youtube.com/watch?v=rVOG3JdbHAM&feature=youtu.be Because people seem to think what I am explaining is not possible? Or I am totally misunderstanding people. Either way, this video should clear it up. I start two servers, neither of them print out any exceptions. When I close the first, the second starts working. Why is this happening? I would expect the 2nd server to simply never start and print an exception. Is this not what should happen?

推荐答案

我试图执行你的代码并且第二个实例返回，

I tried to execute your code and the second instance returned,

 [Errno 98] Address already in use

应该的.SuSE Linux 上的 Python 2.6.

as it should. Python 2.6 on SuSE Linux.

可以用netstat工具检查5000端口是否真的被占用了?

Can check with netstat utility whether port 5000 is really taken?

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