Node.js server.setSecureContext() 方法

server.setSecureContext()是 tls 模块中 Socket 类的内置应用程序编程接口，用于替换现有服务器的安全上下文。

句法：

server.setSecureContext(options)

参数：此方法从 tls.createSecureContext() 选项参数中获取任何可能的属性。

返回值：此方法不返回任何内容。

如何生成私钥和公共证书？

私钥：打开记事本并复制粘贴以下密钥：

将文件另存为private-key.pem

公共证书：打开记事本并复制粘贴以下密钥：

将文件另存为public-cert.pem

示例 1：文件名：index.js

// Node.js program to demonstrate the
// server.setSecureContext() method
  
const { Console } = require('console');
  
// Server.setSecureContext()  API
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, ""));
  });
  
  // Replacing secure context with the new one
  server.setSecureContext(options.cert);
  console.log("secure replaced sucssesfully");
  
  server.close();
});
  
// Start listening on a specific port and address
server.listen(PORT, HOST, function() {
  console.log("I'm listening at %s, "
        + "on port %s", HOST, PORT);
});
  
  
// When an error occurs, show it.
server.on("error", function(error) {
  console.error(error);
});
  
  
// Creating and initializing client
var client = tls.connect(PORT, 
      HOST, options, function() {
  
  // Check if the authorization worked
  if (client.authorized) {
     console.log("Connection authorized "
        + "by a Certificate Authority.");
  } else {
     console.log("Connection not authorized: " 
        + client.authorizationError)
  }
  
  // Send a friendly message
  client.write("I am the client sending"
            + " you a message.");
  client.end();
});
  
client.on("close", function() {
  console.log("Connection closed");
});
  
// When an error occurs, show it.
client.on("error", function(error) {
  
  console.error(error);
  
  // Close the connection after 
  // the error occurred.
  client.destroy();
});

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
Connection not authorized: DEPTH_ZERO_SELF_SIGNED_CERT
secure replaced sucssesfully

Received: I am the client sending you a message.
Connection closed

示例 2：文件名：index.js

// Node.js program to demonstrate the
// server.setSecureContext() 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, ""));
  });
  
  // Replacing secure context with the new one
  server.setSecureContext(options.cert);
  console.log("secure replaced successfully");
  
  server.close();
});
  
// Start listening on a specific port and address
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() {
  
  // Send a friendly message
  client.write("I am the client sending you a message.");
  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
secure replaced successfully

Received: I am the client sending you a message.

参考： https://nodejs.org/dist/latest-v12.x/docs/api/tls.html#tls_server_setsecurecontext_options

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