Node.js Http2Stream Response用法及代码示例

如果已从连接的HTTP /2服务器接收到此流的响应HEADERS帧，则将发出http2服务器中的‘response’事件。

用法:

Event:'response'

参数：此事件不接受任何参数作为参数。

返回值：此事件仅返回回调函数。

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 
// response event 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); 
  
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':'/' }); 
  
// Emitting response event 
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"); 
  }) 
});

使用以下命令运行index.js文件：

node index.js

输出：

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

范例2： 文件名：index.js

Javascript

// Node.js program to demonstrate the 
// response event 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); 
  
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':'/' }); 
  
// Emitting response event 
req.on('response', (responseHeaders) => { 
  console.log("status:", responseHeaders); 
}); 
  
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：

status: [Object:null prototype] {   
  ':status':200,
  date:'Tue, 10 Nov 2020 15:54:51 GMT'
}
Received:world
client closed
server closed

参考：https://nodejs.org/dist/latest-v12.x/docs/api/http2.html#http2_event_response

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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 Http2Stream Response Event。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。