http.ClientRequest.getHeader() 是 http 模块中 ClientRequest 类的内置应用程序编程接口,用于获取特定标头名称的标头对象。
用法:
const request.getHeader(name)
参数:此方法将标头名称作为参数。
返回值:此方法返回标题的对象作为输出。
范例1:
Javascript
// Node.js program to demonstrate the
// request.getHeader() APi
// 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');
// getting header
// by using getHeader() api
console.log("header:- " + req.getHeader('content-type'))
process.exit(0)
});
输出:
范例2:
Javascript
// Node.js program to demonstrate the
// request.getHeader() APi
// 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']);
// getting header
// by using getHeader() api
const v = req.getHeader('Cookie');
// display the result
console.log("header:- " + v)
process.exit(0)
});
输出:
参考:https://nodejs.org/dist/latest-v12.x/docs/api/http.html#http_request_getheader_name
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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 http.ClientRequest.getHeader() API。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。