Node.js http。ClientRequest.setHeader()方法
原文:https://www . geesforgeks . org/node-js-http-client request-set header-method/
http。ClientRequest.setHeader() 是 HTTP 模块内 ClientRequest 类的内置应用编程接口，用于设置头的对象。
语法:
const request.setHeader(name, value)
参数:该方法以特定报头的名称和值作为参数作为键值对。
返回值:这个方法没有什么可返回的。
示例 1: Filename-index.js
java 描述语言
// Node.js program to demonstrate the
// request.setHeader() method
// Importing http module
const http = require('http');
// Create an HTTP server
http.createServer((req, res) => { })
.listen(3000, '127.0.0.1', () => {
// Getting client request
const req = http.request({
port: 3000,
host: '127.0.0.1',
});
req.setHeader('content-type', 'text/html');
console.log("before operation :- "
+ req.getHeader('content-type'))
// Removing header by using
// removeHeader() method
req.removeHeader('content-type')
console.log("after operation :- "
+ req.getHeader('content-type'))
process.exit(0)
});
使用以下命令运行 index.js 文件:
node index.js
输出:
before operation :- text/html
after operation :- undefined
示例 2:Filename-index . js
Javascript
// Node.js program to demonstrate the
// request.setHeader() method
// Importing http module
const http = require('http');
// Create an HTTP server
const server = http.createServer((req, res) => {
res.writeHead(200, { 'Content-Type': 'text/plain' });
res.end('okay');
});
// Now that server is running
server.listen(3000, '127.0.0.1', () => {
// Make a request
const options = {
port: 3000,
host: '127.0.0.1',
headers: {
'Connection': 'Upgrade',
'Upgrade': 'websocket'
}
};
// Getting client request
const req = http.request(options);
req.setHeader('Cookie', ['type=ninja',
'language=javascript']);
console.log("before operation :- "
+ req.getHeader('Cookie'))
// Removing header by using
// removeHeader() method
req.removeHeader('Cookie')
console.log("after operation :- "
+ req.getHeader('Cookie'))
process.exit(0)
});
使用以下命令运行 index.js 文件:
node index.js
输出:
before operation :- type=ninja,language=javascript
after operation :- undefined
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