如何在不杀死进程的情况下停止node.js服务器？

Question

Say a server is created like:

var net = require('net');

var server = net.createServer();
server.listen(32323, '127.0.0.1');

server.close(); // gives a "not running" error if there is IP in the listen statement

is there a way to stop it from node.js, eg without ending/killing the whole process?

Also, here's a more complicated example that doesn't stop regardless of the IP the server is bound to:

var net = require('net');

var server = net.createServer(function(socket) {
    socket.on('data', console.log);
    server.close();
});

server.listen(32323);

var socket = net.createConnection(32323);
socket.write('hi');

Answer 1

server.close

Do not call close before the "listening" event fires.

Either add a callback to listen or add an event manually

server.listen(port, host, function () { server.close(); });
// OR
server.on("listening", function () { server.close(); });
server.listen(port, host);

var net = require('net');

var server = net.createServer(function(socket) {
    socket.on('data', console.log);
    server.close();
});

server.listen(32323);

var socket = net.createConnection(32323);
// call end to make sure the socket closes
socket.end('hi');

Answer 2

Skipping to the 2nd, more realistic case: close the current connection before calling server.close :

var net = require('net')

var server = net.createServer(function(socket){
    socket.on('data', function(data){
        console.log(data.toString())
        socket.destroy()
        server.close()
    })
})

server.listen(32323)

Note that if you don't have any other server instances or activity going on in this process it will quit after closing server .

Answer 3

If it's a HTTP or HTTPS server, it helps if you close the socket of the request with the following:

function onRequest(request, response) {
    response.end(); //close the response
    request.connection.end(); //close the socket
    request.connection.destroy; //close it really
    server.close(); //close the server
}

server.on("request", onRequest);
server.on("close", function() {console.log("closed");});

server.listen(port, host);

Hope that helps.

Answer 4

Here is an example demonstrating what I think you're after.

var net = require('net');


var server = net.createServer(function (socket) {
  socket.on('data', function (data) {
    console.log("server got data " + data.toString());

  });
});

function startServer() {
  server.listen(32323, function () {
    console.log('server started');
  });
}

function stopServer() {
  server.close(function () {
    console.log('server stopped');
  });
}

setInterval(function () {

  if (server.address()) {
    console.log("Server is running on port " + server.address().port + " let's kill it.");
    stopServer();
  } else {
    console.log("Server is stopped let's start it.");
    startServer();
  }

}, 10000);


setInterval(function () {

  var socket = net.createConnection(32323, function () {
    socket.write('hi');
  });
  socket.on('error', function (e) {
    console.log(e.message);
  });


}, 1000);

startServer();

Answer 5

server.close() prevents new connections and waits until all the clients are closed.

To forcibly kill a node server you need to call server.close() and then close all the open connections from the server end.

When a client connects keep track of the socket.

var sockets = []

var server = net.createServer((socket) => {
   sockets.push(socket)
})

To forcibly kill ...

server.close()
sockets.forEach( (s) => s.end() )