Node.js Http2Stream close用法及代碼示例

銷毀Http2Stream時，會發出http2服務器中的‘close’事件。

用法:

Event:'close'

參數：此事件不接受任何參數作為參數。

返回值：此事件僅返回回調函數。

如何生成私鑰和公共證書？

私鑰：

步驟-1：打開記事本，然後複製並粘貼以下 key 。

步驟 - 2：另存為private-key.pem

公開證書：

步驟-1：打開記事本，然後複製並粘貼以下 key 。

步驟 - 2：另存為public-cert.pem

範例1： 文件名：index.js

Javascript

// Node.js program to demonstrate the 
// close Event 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() method 
const server = http2.createServer(options); 
  
  
server.on('stream', (stream, requestHeaders) => { 
  stream.respond({  
    ':status':200,  
    'content-type':'text/plain' 
  }); 
  stream.write('hello '); 
  
   // Getting rst stream code 
   // by using rstCode api 
   const status = stream.rstCode; 
  
   stream.end("RST_STREAM error code:"
     + status); 
  
   stream.destroy(); 
  
   // Close event is emitted 
   stream.on('close',()=>{ 
     console.log("stream is destroyed") 
   }) 
  
  // 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('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 destroyed"); 
  }) 
});

輸出：

stream is destroyed
status:200
Received:hello
client destroyed
server destroyed

使用以下命令運行index.js文件：

node index.js

範例2： 文件名：index.js

Javascript

// Node.js program to demonstrate the 
// close Event 
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); 
  
server.on('stream', (stream, requestHeaders) => { 
  
  
   // Getting rst stream code 
   // by using rstCode api 
   const status = stream.rstCode; 
  
   stream.end("RST_STREAM error code:" + status); 
  
   stream.destroy(); 
  
   // Close event is emitted 
   stream.on('close',()=>{ 
     console.log("stream is destroyed") 
   }) 
    
  // 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"); 
  }) 
});

輸出：

stream is destroyed
Received:RST_STREAM error code:0
client destroyed
server destroyed

使用以下命令運行index.js文件：

node index.js

參考： https://nodejs.org/dist/latest-v12.x/docs/api/http2.html#http2_event_close_1

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注：本文由純淨天空篩選整理自RohitPrasad3大神的英文原創作品 Node.js Http2Stream close Event。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。