Node.js http2.getPackedSettings()用法及代码示例

http2.getPackedSettings()是http2模块内的类http2的内置应用程序编程接口，用于提供一个对象，该对象包含HTTP /2规范中指定的给定HTTP /2设置的序列化表示。

用法:

const http2.getPackedSettings([settings])

参数：此方法采用可选的http2设置作为参数。

返回值：此方法返回一个对象，该对象包含HTTP /2规范中指定的给定HTTP /2设置的序列化表示。

如何生成私钥和公共证书？

1.文件名：私钥

打开记事本和copy-paste下面的项并将文件另存为private-key.pem

2.文件名：公开证书

打开记事本和copy-paste下面的项并将文件另存为public-cert.pem

范例1： 文件名：index.js

Javascript

// Node.js program to demonstrate the 
// http2.getPackedSettings() method 
  
const http2 = require('http2'); 
const fs = require('fs'); 
  
// Private key and public certificate for access 
const options = { 
  key:fs.readFileSync('private-key.pem'), 
  cert:fs.readFileSync('public-cert.pem'), 
}; 
  
// Creating and initializing server 
// by using http2.createServer() method 
const server = http2.createServer(options); 
  
// Getting packed setting  
// by using getPackedSettings() method 
const value =  http2.getPackedSettings( 
    { enablePush:false }) 
  
console.log("packed setting:- " 
    + value.toString('base64')); 
  
server.on('stream', (stream, requestHeaders) => { 
    stream.respond({ ':status':200, 'content-type':  
    'text/plain' }); 
    stream.write('hello '); 
    stream.end('world'); 
      
    // Stopping the server 
    // by using the close() method 
    server.close(() => { 
        console.log("server closed"); 
    }) 
}); 
  
server.listen(8000); 
  
// Creating and initializing client 
// by using tls.connect() method 
const client = http2.connect('http://localhost:8000'); 
  
const req = client.request({  
  ':method':'GET', ':path':'/' }); 
  
req.on('response', (responseHeaders) => { 
    console.log("status:" 
    + responseHeaders[":status"]); 
}); 
  
req.on('data', (data) => { 
    console.log('Received:%s ', 
    data.toString().replace(/(\n)/gm,"")); 
}); 
  
req.on('end', () => { 
    client.close(() => { 
        console.log("client closed"); 
    }) 
});

使用以下命令运行index.js文件：

node index.js

输出：

packed setting:- AAIAAAAA
status:200
Received:hello
Received:world
client closed
server closed

范例2： 文件名：index.js

Javascript

// Node.js program to demonstrate the 
// http2.getPackedSettings() method 
  
const http2 = require('http2'); 
const fs = require('fs'); 
  
// Private key and public certificate for access 
const options = { 
  key:fs.readFileSync('private-key.pem'), 
  cert:fs.readFileSync('public-cert.pem'), 
}; 
  
// Creating and initializing server 
// by using http2.createServer() method 
const server = http2.createServer(options); 
  
// Getting packed setting  
// by using getPackedSettings() method 
const value =  http2.getPackedSettings( 
  { enablePush:true }) 
  
console.log("packed setting:- " 
  + value.toString('base64')); 
  
server.on('stream', (stream, requestHeaders) => { 
    stream.end('world'); 
      
    // Stopping the server 
    // by using the close() method 
    server.close(() => { 
        console.log("server closed"); 
    }) 
}); 
  
server.listen(8000); 
  
// Creating and initializing client 
// by using tls.connect() method 
const client = http2.connect('http://localhost:8000'); 
  
const req = client.request({  
  ':method':'GET', ':path':'/' }); 
  
req.on('data', (data) => { 
    console.log('Received:%s ', 
    data.toString().replace(/(\n)/gm,"")); 
}); 
  
req.on('end', () => { 
    client.close(() => { 
        console.log("client closed"); 
    }) 
});

使用以下命令运行index.js文件：

node index.js

输出：

packed setting:- AAIAAAAB
Received:world
client closed
server closed

参考：https://nodejs.org/dist/latest-v12.x/docs/api/http2.html#http2_http2_getpackedsettings_settings

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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 http2.getPackedSettings() 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。