node . js http 2 server response . hasheader()方法
原文:https://www . geesforgeks . org/node-js-http2 server response-hasheader-method/
Http2ServerResponse . hasheader()是 http2 模块内的类 http2 server response 的内置应用编程接口，用于检查名称标识的标头当前是否设置在传出标头中。
语法:
response.hasHeader(name)
参数:该方法接受表头名称作为参数。
返回值:当且仅当名称标识的标头当前是否设置在传出标头中时，此方法返回真。
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.hasHeader() 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'
);
// Checking if the header is present or not
// by using hasHeader() method
const value = response.hasHeader('Content-Type')
// Display the header
if(value) console.log("header is present")
else console.log("header is not present")
};
// 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 is present
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.hasHeader() 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']);
// Checking if the header is present or not
// by using hasHeader() method
const value = response.hasHeader('Content-Type')
// Display the header
if(value) console.log("header is present")
else console.log("header is not present")
};
// 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 is not present
Received: The sum weight of all Http2Stream : 0
client destroyed
server destroyed
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