Node.js Http2Stream Timeout用法及代碼示例

如果在配置的毫秒數後Http2Stream上沒有活動，則將發出http2服務器中的‘timeout’事件。

用法:

Event:'timeout'

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？

1.文件名：私鑰打開記事本，然後按copy-paste鍵，然後將文件另存為private-key.pem。

2.文件名：公共證書打開記事本，然後單擊copy-paste，然後將文件另存為public-cert.pem。

範例1： 文件名：index.js

Javascript

// Node.js program to demonstrate the 
// timeout 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) => { 
  
  // Setting timeout for the stream  
  // by using setTimeout()  
  stream.setTimeout(3000) 
  
  // Emitting timeout event 
  stream.on('timeout',()=>{ 
    stream.respond({  
      ':status':200,  
      'content-type':'text/plain' 
    }); 
  
    stream.end("surprise !!!"); 
  }) 
  
  // 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"); 
  }) 
});

使用以下命令運行index.js文件：

node index.js

輸出：

status:200
Received:surprise !!!
client destroyed
server destroyed

範例2： 文件名：index.js

Javascript

// Node.js program to demonstrate the 
// timeout 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) => { 
  
  // Setting timeout for the stream  
  // by using setTimeout()  
  stream.setTimeout(3000) 
  
  // Emitting timeout event 
  stream.on('timeout',() => { 
    console.log("Timeout event called") 
  }) 
    
  // 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"); 
  }) 
});

使用以下命令運行index.js文件：

node index.js

輸出：

Timeout event called

參考：https://nodejs.org/dist/latest-v12.x/docs/api/http2.html#http2_event_timeout_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 Timeout 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。