Node.js server.listen()方法

原文:https://www.geeksforgeeks.org/node-js-server-listen-method/

server.listen() 是 tls 模块内 Socket 类的内置应用编程接口，用于启动服务器监听加密连接。

语法:

const server.listen([port[, host[, backlog]]][, callback])

参数:该方法以下列参数为参数:

• 端口:是端口号。

• 主机:是未指定的 IPv4 地址。

返回值:这个方法除了一个回调函数，没有什么可以返回的。

如何生成私钥和公钥证书？

1. Private key: Open notepad and copy paste the following key:

   js -----BEGIN RSA PRIVATE KEY----- MIICXQIBAAKBgQC38R9wXcUbhOd44FavgmE5R3K4JeYOHLnI7dUq1B8/Gv7l3SOg JKef/m9gM1KvUx951mapXGtcWgwB08J3vUE2YOZ4tWJArrVZES0BI/RmFAyhQFP5 HcWl3LSM9LRihP98F33oIkKaCxA5LxOrkgpV4HrUzIKTABDYah7RPex1WQIDAQAB AoGBAIXR71xxa9gUfc5L7+TqBs+EMmrUb6Vusp8CoGXzQvRHMJCMrMFySV0131Nu o0YYRDsAh1nJefYLMNcXd1BjqI+qY8IeRsxaY+9CB2KKGVVDO2uLdurdC2ZdlWXT Vwr3dDoyR0trnXJMmH2ijTeO6bush8HuXxvxJBjvEllM5QYxAkEA3jwny9JP+RFu 0rkqPBe/wi5pXpPl7PUtdNAGrh6S5958wUoR4f9bvwmTBv1nQzExKWu4EIp+7vjJ fBeRZhnBvQJBANPjjge8418PS9zAFyKlITq6cxmM4gOWeveQZwXVNvav0NH+OKdQ sZnnDiG26JWmnD/B8Audu97LcxjxcWI8Jc0CQEYA5PhLU229lA9EzI0JXhoozIBC TlcKFDuLm88VSmlHqDyqvF9YNOpEdc/p2rFLuZS2ndB4D+vu6mjwc5iZ3HECQCxy GBHRclQ3Ti9w76lpv+2kvI4IekRMZWDWnnWfwta+DGxwCgw2pfpleBZkWqdBepb5 JFQbcxQJ0wvRYXo8qaUCQQCgTvWswBj6OTP7LTvBlU1teAN2Lnrk/N5AYHZIXW6m nUG9lYvH7DztWDTioXMrruPF7bdXfZOVJD8t0I4OUzvC -----END RSA PRIVATE KEY-----

   将文件保存为私钥

2. Public certificate: Open notepad and copy paste the following key:

   js -----BEGIN CERTIFICATE----- MIICfzCCAegCCQDxxeXw914Y2DANBgkqhkiG9w0BAQsFADCBgzELMAkGA1UEBhMC SU4xEzARBgNVBAgMCldlc3RiZW5nYWwxEDAOBgNVBAcMB0tvbGthdGExFDASBgNV BAoMC1BhbmNvLCBJbmMuMRUwEwYDVQQDDAxSb2hpdCBQcmFzYWQxIDAeBgkqhkiG 9w0BCQEWEXJvZm9mb2ZAZ21haWwuY29tMB4XDTIwMDkwOTA1NTExN1oXDTIwMTAw OTA1NTExN1owgYMxCzAJBgNVBAYTAklOMRMwEQYDVQQIDApXZXN0YmVuZ2FsMRAw DgYDVQQHDAdLb2xrYXRhMRQwEgYDVQQKDAtQYW5jbywgSW5jLjEVMBMGA1UEAwwM Um9oaXQgUHJhc2FkMSAwHgYJKoZIhvcNAQkBFhFyb2ZvZm9mQGdtYWlsLmNvbTCB nzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEAt/EfcF3FG4TneOBWr4JhOUdyuCXm Dhy5yO3VKtQfPxr+5d0joCSnn/5vYDNSr1MfedZmqVxrXFoMAdPCd71BNmDmeLVi QK61WREtASP0ZhQMoUBT+R3Fpdy0jPS0YoT/fBd96CJCmgsQOS8Tq5IKVeB61MyC kwAQ2Goe0T3sdVkCAwEAATANBgkqhkiG9w0BAQsFAAOBgQATe6ixdAjoV7BSHgRX bXM2+IZLq8kq3s7ck0EZrRVhsivutcaZwDXRCCinB+OlPedbzXwNZGvVX0nwPYHG BfiXwdiuZeVJ88ni6Fm6RhoPtu2QF1UExfBvSXuMBgR+evp+e3QadNpGx6Ppl1aC hWF6W2H9+MAlU7yvtmCQQuZmfQ== -----END CERTIFICATE-----

   将文件保存为公共证书

示例 1: 文件名:index.js

// Node.js program to demonstrate the
// server.listen() method

var tls = require('tls'),
    fs = require('fs'),

// Port and host address for server    
PORT = 1337,
HOST = '127.0.0.1';

// Private key and public certificate for access
var options = {
  key: fs.readFileSync('private-key.pem'),
  cert: fs.readFileSync('public-cert.pem'),
  rejectUnauthorized: false
};

// Creating and initializing server
var server = tls.createServer(options, function(socket) {

  // Print the data that we received
  socket.on('data', function(data) {
     console.log('\nReceived: %s ',
     data.toString().replace(/(\n)/gm, ""));
  });

  // Stopping the server
  // by using the close() method
  server.close();
});

// Getting session key 
// by using getTicketKeys() method
const value1 = server.getTicketKeys();
console.log(value1)

// Close event
server.on('close', () => {
  console.log("Server closed successfully");
})

// Start listening on a specific port and address
// by using listen() method
server.listen(PORT, HOST, function() {
  console.log("I'm listening at %s, on port %s", HOST, PORT);
});

// Creating and initializing client
var client = tls.connect(PORT, HOST, options, function() {

  // Getting the bound address 
  // by using address method
  const value = client.address();
  client.write("Bound address : " + value)
  client.end();
});

输出:

我在 127.0.0.1 监听端口 1337

收到:绑定地址:[对象对象] 服务器成功关闭

示例 2: 文件名:index.js

// Node.js program to demonstrate the
// server.listen() method

var tls = require('tls'),
    fs = require('fs'),

// Port and host address for server    
PORT = 1337,
HOST = '127.0.0.1',
value = null;

// Private key and public certificate for access
var options = {
  key: fs.readFileSync('private-key.pem'),
  cert: fs.readFileSync('public-cert.pem'),
  rejectUnauthorized: false
};

// Creating and initializing server
var server = tls.createServer(options, function(socket) {

  // Print the data that we received
  socket.on('data', function(data) {
    console.log('\nReceived: %s ',
    data.toString());
  });

  // Stopping the server
  // by using the close() method
  server.close();
});

// Getting session key 
// by using getTicketKeys() method
value = server.getTicketKeys();

// Start listening on a specific port and address
// by using listen() method
server.listen(PORT, HOST, function() {
  console.log("I'm listening at %s, on port %s", HOST, PORT);
});

// Creating and initializing client
var client = tls.connect(PORT, HOST, options, function() {
  client.write("Session key : " + value[0])
  client.end();
});

使用以下命令运行 index.js 文件:

node index.js

输出:

I'm listening at 127.0.0.1, on port 1337

Received: Session key : 106

参考:https://nodejs . org/dist/latest-v 12 . x/docs/API/TLS . html # TLS _ server _ listen

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