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

http2.getUnpackedSettings()是http2模块内的类http2的内置应用程序编程接口，用于提供HTTP /2设置对象，该对象包含由http2.getPackedSettings()生成的给定缓冲区中的反序列化设置。

用法:

const http2.getUnpackedSettings(buf)

参数：此函数将http2设置作为参数。

返回值：此函数返回一个HTTP /2设置对象，该对象包含由http2.getPackedSettings()生成的给定缓冲区中的反序列化设置。

如何生成私钥和公共证书？

1.文件名：私钥打开记事本，然后按copy-paste键，然后将文件另存为private-key.pem。

2.文件名：公共证书打开记事本，然后单击copy-paste，然后将文件另存为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( 
        { maxFrameSize:163955 }) 
  
const unpacked = http2.getUnpackedSettings(value); 
  
console.log("max frame size:- " 
    + unpacked.maxFrameSize); 
  
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：

max frame size:- 163955
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.getUnpackedSettings() 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({  
        maxHeaderListSize:655353 }) 
  
  
const unpacked = http2.getUnpackedSettings(value); 
  
console.log("max Header list Size:- " 
    + unpacked.maxHeaderListSize); 
  
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：

max Header list Size:- 655353
Received:world
client closed
server closed

参考： https://nodejs.org/dist/latest-v12.x/docs/api/http2.html#http2_http2_getunpackedsettings_buf

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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.getUnpackedSettings() 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。