Node.js http2stream.setTimeout()用法及代碼示例

http2stream.setTimeout()方法是http2模塊內的Http2Stream類的內置應用程序編程接口，用於設置持續時間，在該持續時間後將執行特定操作。

用法:

const http2stream.setTimeout(msecs, callback)

參數：此方法采用duration的整數值。

返回值：此方法僅返回超時後開始特定活動的回調函數。

如何生成私鑰和公共證書？

私鑰：打開記事本並複製粘貼以下 key ：

現在將文件另存為private-key.pem

公開證書：打開記事本並複製粘貼以下 key ：

現在將文件另存為public-cert.pem

範例1： 文件名：index.js

Javascript

// Node.js program to demonstrate the 
// Http2Stream.setTimeout() API 
const http2 = require('http2'); 
const fs = require('fs'); 
  
// private key and public certificate for acess 
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) => { 
  
  
   // setting time out for the stream  
   // by using setTimeout()  
   stream.setTimeout(3000, ()=>{ 
     stream.respond({  
       ':status':200,  
       'content-type':'text/plain' 
     }); 
  
     stream.end("surprise !!!"); 
   }) 
  
  // stoping 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：

status:200
Received:surprise !!!
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 
// Http2Stream.setTimeout() API 
const http2 = require('http2'); 
const fs = require('fs'); 
  
// private key and public certificate for acess 
const options = { 
  key:fs.readFileSync('private-key.pem'), 
  cert:fs.readFileSync('public-cert.pem'), 
}; 
  
  
// creating and intializing 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"); 
  }) 
  
  // Cancel the stream if there's 
  // no activity after 3 seconds 
  req.setTimeout(3000, ()=>{ 
  
    req.close(NGHTTP2_CANCEL); 
  }) 
    
});

輸出：

events.js:292
throw er; // Unhandled ‘error’ event
^

Error [ERR_HTTP2_STREAM_CANCEL]:The pending stream has been canceled (caused by:connect ECONNREFUSED 127.0.0.1:8000)
at ClientHttp2Session.destroy (internal/http2/core.js:1379:20)
at Socket.socketOnError (internal/http2/core.js:2758:13)
at Socket.emit (events.js:315:20)
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
at processTicksAndRejections (internal/process/task_queues.js:84:21)
Emitted ‘error’ event on ClientHttp2Stream instance at:
at emitErrorNT (internal/streams/destroy.js:92:8)
at emitErrorAndCloseNT (internal/streams/destroy.js:60:3)
at processTicksAndRejections (internal/process/task_queues.js:84:21) {
cause:Error:connect ECONNREFUSED 127.0.0.1:8000
at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1141:16) {
errno:‘ECONNREFUSED’,
code:‘ECONNREFUSED’,
syscall:‘connect’,
address:‘127.0.0.1’,
port:8000
},
code:‘ERR_HTTP2_STREAM_CANCEL’
}

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_http2stream_settimeout_msecs_callback

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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.setTimeout() Method。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。