Node.js Http2ServerResponse.getHeaderNames() 方法

Http2ServerResponse.getHeaderNames()是 http2 模块中类 Http2ServerResponse 的内置应用程序编程接口，用于返回包含当前传出标头的唯一名称的数组。

句法：

response.getHeaderNames()

参数：此方法不接受任何参数作为参数。

返回值：此方法返回一个数组，其中包含当前传出标头的唯一名称。

如何生成私钥和公共证书？

1. 文件名：私钥

打开记事本并复制粘贴以下密钥并将文件保存为private-key.pem

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

2. 文件名：公共证书

打开记事本并复制粘贴以下密钥并将文件另存为public-cert.pem

-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

示例 1：文件名：index.js

Javascript

// Node.js program to demonstrate the
// Http2ServerResponse.getHeaderNames() 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'),
};
  
// Request and response handler
const http2Handlers = (request, response) => {
  
    // Setting new header
    response.setHeader(
      'Content-Type', 
      'hello world; charset=utf-8'
    );
  
    // Getting header's names
    // by using getHeaderNames() method
    const value = response.getHeaderNames()
  
    // Display the header
    console.log("header names :- " +  value);
};
  
// Creating and initializing server
// by using http2.createServer() method
const server = http2
  .createServer(options,http2Handlers);
  
server.on('stream', (stream, requestheader) => {
    stream.write('hello ');
  
    // Getting all information of this
    // http2stream object by using 
    // state method
    const status = stream.state;
  
    stream.end("priority weight : " 
      + status.weight);
  
    // 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', (responsesocket) => {
    console.log("status : " 
    + responsesocket[":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：

header :- content-type
status : 200
Received: hello
Received: priority weight : 16
client destroyed
server destroyed

示例 2：文件名：index.js

Javascript

// Node.js program to demonstrate the
// Http2ServerResponse.getHeaderNames() 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'),
};
  
// Request and response handler
const http2Handlers = (request, response) => {
  
    // Setting new header
    response.setHeader('Foo', 'bar');
    response.setHeader(
      'Set-Cookie', ['foo=bar', 'bar=baz']);
  
    // Getting header
    // by using getHeader() method
    const value = response.getHeaderNames()
  
    // Display the header
    console.log("header names")
  
    value.forEach(element => { 
        console.log(element); 
    }); 
};
  
// Creating and initializing server
// by using http2.createServer() method
const server = http2.createServer(options,http2Handlers);
  
server.on('stream', (stream, requestHeaders) => {
  
    // Getting all information of this http2stream object
    // by using state method
    const status = stream.state;
  
    stream.end("The sum weight of all Http2Stream : " + 
    status.sumDependencyWeight);
  
    // 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': '/www.geeksforgeeks.org' });
  
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：

header names
foo
set-cookie
Received: The sum weight of all Http2Stream : 0
client destroyed
server destroyed

参考：https://nodejs.org/dist/latest-v12.x/docs/api/http2.html#http2_response_getheader_name