Node.js http2session.pendingSettingsAck用法及代码示例

http2session.pendingSettingsAck是http2模块内的类http2session的内置应用程序编程接口，用于指示Http2Session当前是否正在等待对已发送SETTINGS帧的确认。

用法:

const http2session.pendingSettingsAck

参数：此方法不接受任何参数。

返回值：调用http2session.settings()方法后，此方法返回true；否则，如果已确认所有发送的SETTINGS帧，则返回false。

如何生成私钥和公钥

私钥

步骤 - 1：打开记事本，然后复制粘贴以下关键

步骤 - 2：另存为private-key.pem

公证书

步骤 - 1：打开记事本，然后复制粘贴以下关键

步骤 - 2：另存为public-cert.pem

范例1： 文件名：index.js

Javascript

// Node.js program to demonstrate the 
// http2session.pendingSettingsAck API 
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() api 
const server = http2.createServer(options); 
  
  
server.on('stream', (stream, requestHeaders) => { 
  stream.respond({  
    ':status':200,  
    'content-type':'text/plain' 
  }); 
  
  stream.write('hello '); 
  
   const http2session = stream.session; 
  
   // Checking if the acknowledgement is received 
   // or not by using pendingSettingsAck API 
   const status = http2session.pendingSettingsAck; 
  
  
   if(status) 
   stream.end("all frame is not  acknowledged") 
   else
   stream.end("all frames are acknowledged") 
  
  // Stopping the server by 
  // using the close() method 
  server.close(()=>{ 
    console.log("server localSettings"); 
  }) 
}); 
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 localSettings"); 
  }) 
});

输出：

status:200
Received:hello
Received:all frame is not  acknowledged
client localSettings
server localSettings

使用以下命令运行index.js文件：

node index.js

范例2： 文件名：index.js

Javascript

// Node.js program to demonstrate the 
// http2session.pendingSettingsAck API 
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() api 
const server = http2.createServer(options); 
  
  
server.on('stream', (stream, requestHeaders) => { 
  
   // Getting session object 
   // by using session api 
   const http2session = stream.session; 
  
   // Checking if the acknowledgement is received 
   // or not by using pendingSettingsAck API 
   const status = http2session.pendingSettingsAck; 
  
   if(status) 
     stream.end("all frame is not  acknowledged") 
   else
     stream.end("all frames are acknowledged") 
  
  // Stopping the server by 
  // using the close() method 
  server.close(()=>{ 
    console.log("server destroyed"); 
  }) 
}); 
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 destroyed"); 
  }) 
});

输出：

Received:all frame is not  acknowledged
client destroyed
server destroyed

使用以下命令运行index.js文件：

node index.js

参考： https://nodejs.org/dist/latest-v12.x/docs/api/http2.html#http2_http2session_pendingsettingsack

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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 http2session.pendingSettingsAck 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。