Node.js clienthttp2session.request()用法及代码示例

clienthttp2session.request()是http2模块内的ClientHttp2Session类的内置应用程序编程接口，用于返回ClientHttp2Stream的对象。

用法:

const clienthttp2session.request(headers[, options])

参数：此方法将以下参数作为参数。

header:标头对象。
options:它采用任何参数{endStream，exclusive，parent，weight，waitForTrailers}

返回值：此方法返回ClientHttp2Stream的对象。

如何生成私钥和公共证书？

私钥：

步骤— 1：打开记事本，然后复制并粘贴以下 key 。

步骤2：另存为private-key.pem

公开证书

步骤— 1：打开记事本并复制并粘贴以下 key

步骤2：另存为public-cert.pem

示例1：Filename：index.js

Javascript

// Node.js program to demonstrate the 
// clienthttp2session.request() method 
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() method 
const server = http2.createServer(options); 
  
server.on('session', (session) => { 
  
  // Set origin frame 
  session.origin('http://localhost:8000'); 
  console.log("ORIGIN frame is submitted") 
}); 
  
  
server.on('stream', (stream, requestHeaders) => { 
  
  // Setting reponse header to client  
  // by using respond() method 
  stream.respond({  
    ':status':200,  
    'content-type':'text/plain' 
  }); 
    
  stream.write('hello '); 
  
   // Checking if hader is sent or not 
   // by using pushAllowed method 
   const status = stream.pushAllowed; 
  
   if(status) 
     stream.end("push stream is accepted"); 
   else
     stream.end("push stream is not accepted"); 
  
  // 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'); 
  
  
// Getting object of ClientHttp2Stream  
// by using reauest() method 
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"); 
  }) 
});

输出：

ORIGIN frame is submitted
status:200
Received:hello
Received:push stream is accepted
client destroyed
server destroyed

使用以下命令运行index.js文件：

node index.js

示例2：Filename：index.js

Javascript

// Node.js program to demonstrate the 
// clienthttp2session.request() method 
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() method 
const server = http2.createServer(options); 
  
server.on('stream', (stream, requestHeaders) => { 
  
  // Setting reponse header to client  
  // by using respond() method 
  stream.respond({  
    ':status':200,  
    'content-type':'text/plain' 
  }); 
    
  stream.write('hello '); 
  
  const session = stream.session; 
  
  // Set origin frame 
  session.origin('http://localhost:8000'); 
  stream.end("ORIGIN frame is submitted") 
  
  // 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'); 
  
// Getting object of ClientHttp2Stream  
// by using reauest() method 
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"); 
  }) 
});

输出：

status:200
Received:hello
Received:ORIGIN frame is submitted
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_clienthttp2session_request_headers_options

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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 clienthttp2session.request() 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。