node . js http 2 server response . getheader()方法
原文:https://www . geesforgeks . org/node-js-http2 server response-get header-method/
Http2ServerResponse . getheader()是 http2 模块内的类 http2 server response 的内置应用编程接口，用于读出已经排队但未发送到客户端的头。
语法:
response.getHeader(name)
参数:该方法以表头名称为参数。
返回值:这个方法返回表头的字符串表示。
如何生成私钥和公钥证书？
1。文件名:私钥
打开记事本，复制粘贴以下密钥，将文件保存为 私钥. PEMT0】
2。文件名:公共证书
打开记事本，复制粘贴以下密钥，将文件保存为 公共证书T0】
示例 1:Filename:index . js
Javascript
// Node.js program to demonstrate the
// Http2ServerResponse.getHeader() 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
// by using getHeader() method
const value = response.getHeader('content-type')
// Display the header
console.log("header :- " + 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 :- hello world; charset=utf-8
status : 200
Received: hello
Received: priority weight : 16
client destroyed
server destroyed
示例 2:Filename:index . js
Javascript
// Node.js program to demonstrate the
// Http2ServerResponse.getHeader() 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('Set-Cookie', ['type=ninja',
'language=javascript']);
// Getting header
// by using getHeader() method
const value = response.getHeader('Set-Cookie')
// Display the header
console.log("header :- " + value);
};
// 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 :- type=ninja,language=javascript
Received: The sum weight of all Http2Stream : 0
client destroyed
server destroyed
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