Node.js tls.DEFAULT_MAX_VERSION用法及代码示例

tls.DEFAULT_MAX_VERSION是tls模块内的TLS类的内置应用程序编程接口，用于返回tls.createSecureContext()的maxVersion选项的默认值。

用法:

const tls.DEFAULT_MAX_VERSION

参数：此方法不接受任何参数。

返回值：此方法返回tls.createSecureContext()的maxVersion选项的默认值。

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 ：

现在将文件另存为private-key.pem

公开证书：打开记事本并复制粘贴以下 key ：

现在将文件另存为public-cert.pem

范例1： 文件名：index.js

// Node.js program to demonstrate the 
// tls.DEFAULT_MAX_VERSION 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 max version by using 
        // tls.DEFAULT_MAX_VERSION method 
        value = tls.DEFAULT_MAX_VERSION; 
  
        client.write(" max version:" + value); 
  
        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 closed successfully

Received: max version:TLSv1.3
Server closed successfully

范例2： 文件名：index.js

// Node.js program to demonstrate the 
// tls.DEFAULT_MAX_VERSION 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 max version by using 
        // tls.DEFAULT_MAX_VERSION method 
        value = tls.DEFAULT_MAX_VERSION; 
  
        socket.write(" max version:" + 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: max version:TLSv1.3
client closed successfully
Server closed successfully

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

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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 tls.DEFAULT_MAX_VERSION 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。