Node.js tlsSocket.getProtocol()用法及代码示例

tlsSocket.getProtocol()是tls模块内TLSSocket类的内置应用程序编程接口，用于返回包含当前连接的协商SSL /TLS协议版本的字符串。

用法:

const tlsSocket.getProtocol()

参数：此方法不接受任何参数。

返回值：此方法返回一个字符串，其中包含当前连接的协商的SSL /TLS协议版本。

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 key ：

将文件另存为private-key.pem

公开证书：打开记事本并复制粘贴以下 key ：

将文件另存为public-cert.pem

范例1： 文件名：index.js

// Node.js program to demonstrate the 
// tlsSocket.getProtocol() 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().replace(/(\n)/gm, "")); 
  }); 
  
  // Stopping the server 
  // by using the close() method 
  server.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 tsl protocol version 
  // by using tlsSocket.getProtocol() method 
  value = client.getProtocol(); 
  
  client.write("Protocol:" + value); 
    
  client.end(() => { 
    console.log("Client closed successfully"); 
  }); 
});

输出：

I'm listening at 127.0.0.1, on port 1337
Client closed successfully

Received:Protocol:TLSv1.3
Server closed successfully

范例2： 文件名：index.js

// Node.js program to demonstrate the 
// tlsSocket.getProtocol() 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) { 
  
  // Getting tsl protocol version 
  // by using tlsSocket.getProtocol() method 
  value = socket.getProtocol(); 
  
  socket.write("Protocol:" + value); 
  
  // Stopping the server 
  // by using the close() method 
  server.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() { 
   console.log("client is connected"); 
}); 
  
client.on("data", function(data) { 
  
  console.log('Received:%s', 
  data.toString().replace(/(\n)/gm, "")); 
  
  // Close the connection after receiving the message 
  client.end(() => { 
    console.log("client closed successfully") 
  }); 
});

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
client is connected
Received:Protocol:TLSv1.3
client closed successfully
Server closed successfully

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

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注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 Node.js tlsSocket.getProtocol() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。