node.js 以编程方式停止和重新启动快速服务器（以更改端口）
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Programmatically stop and restart express servers (to change ports)
提问by Matt
I'm looking to be able to basically change ports that my express app is running on.
我希望能够基本上更改我的 Express 应用程序正在运行的端口。
I've tried:
我试过了：
server.on('close', function() {
server.listen(3000);
});
server.listen(8080);
server.close();
This returns a cryptic node.js error. I'm running node v0.4.11, I'm upgrading now to see if that fixes it.
这将返回一个神秘的 node.js 错误。我正在运行 node v0.4.11，我现在正在升级以查看是否可以修复它。
EDITHere's the error:
编辑这是错误：
Assertion failed: (!io->watcher_.active), function Set, file ../src/node_io_watcher.cc, line 160.
Thanks, Matt
谢谢，马特
回答by loganfsmyth
The issue is that .listenis asynchronous. By calling .closeimmediately after calling .listen, you are closing it before it has been opened.
问题是这.listen是异步的。通过在调用.close之后立即调用.listen，您将在它被打开之前关闭它。
Try this instead.
试试这个。
server.listen(8080, function() {
server.close();
});
回答by Derek Hill
Thanks to @aymericbeaumet, the following snippet works with Express 4:
感谢@aymericbeaumet，以下代码段适用于 Express 4：
var app = express();
var server = app.listen(8080, function() {
console.log('Listening :)');
server.close(function() { console.log('Doh :('); });
});
