const http = require("http");
function createServer(
name,
hostname
)
{
const server = http.createServer(
(
request,
response
) =>
{
console.log("request on", name);
response.end(name);
}
);
server.on(
"error",
(error) => console.log(`${name} error`, error)
);
server.on(
"close",
() => console.log(`${name} closed`)
);
server.listen(4321, hostname, () => console.log(`${name} listening (${server.listening}) on address`, server.address()));
}
createServer(
"Server 1",
"localhost"
);
createServer(
"Server 2",
"127.0.0.1"
);
createServer(
"Server 3",
"127.0.1.1"
);
createServer(
"Server 4",
"localhost"
);
createServer(
"Server 5",
"10.9.129.49"
);
createServer(
"Server 6",
"localhost"
);
使用Node v6.15.1,v8.14.1和v10.15.0,以上代码会将其打印在我的计算机上:
Server 2 listening (true) on address { address: '127.0.0.1', family: 'IPv4', port: 4321 }
Server 3 listening (true) on address { address: '127.0.1.1', family: 'IPv4', port: 4321 }
Server 5 listening (true) on address { address: '10.9.129.49', family: 'IPv4', port: 4321 }
Server 1 listening (true) on address { address: '127.0.0.1', family: 'IPv4', port: 4321 }
Server 4 listening (true) on address { address: '127.0.0.1', family: 'IPv4', port: 4321 }
Server 6 listening (true) on address { address: '127.0.0.1', family: 'IPv4', port: 4321 }
这怎么可能?我本来希望触发EADDRINUSE
错误。
EDIT (此问题的先前版本)仅显示了两个使用主机名localhost
的服务器。该代码已更新,以表明无论服务器数量或主机如何,问题似乎仍然存在。
更新
我尝试混合使用指向我的计算机的不同主机名(localhost
,127.0.0.1
,本地IP等),即使打印的address
对象显示了不同的值, address()
没有错误。
我很好奇它是否与Node.js的server.listen
方法相关,从而允许多次调用自身。也许Node.js检测到我使用的所有主机名都绑定到相同的设备和端口,所以它只是按照文档所说的那样“重新打开”。