Node.js server.addContext()用法及代码示例

server.addContext()是tls模块内的Socket类的内置应用程序编程接口，用于添加安全上下文以供客户端使用。

用法:

server.addContext(hostname, context)

参数：此方法将以下参数作为参数：

hostname:指示主机名的服务器名称。
context:tls.createSecureContext()选项参数中的任何属性。

返回值：此方法不返回任何值。

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 ：

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 
// server.setBroadcast() 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, "")); 
    }); 
  
}); 
  
// Adding context into the server 
server.addContext('127.0.0.2', options.key); 
console.log("context is added"); 
  
// 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); 
    // Close the connection after the 
    // error occurred. 
    // server.destroy(); 
}); 
  
server.on("end", () => { 
    server.end(); 
    //server.destroy(); 
}) 
  
  
// 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(); 
});

输出：

context is added
I'm listening at 127.0.0.1, on port 1337
Connection not authorized:DEPTH_ZERO_SELF_SIGNED_CERT

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

范例2： 文件名：index.js

// Node.js program to demonstrate the 
// server.addcontext() 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, "")); 
    }); 
}); 
  
// Adding context into the server 
// by using addContext() method 
server.addContext('127.0.0.2', options.key); 
console.log("context is added"); 
  
// 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：

context is added
I'm listening at 127.0.0.1, on port 1337

Received:I am the client sending you a message.

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

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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 server.addContext() 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。