Node.js DNS
介绍:
DNS 是一个节点模块,用于执行操作系统提供的名称解析功能,也用于执行实际的 DNS 查找。
优势
无需记住 IP 地址——DNS 服务器提供了一个将域名或子域名转换为 IP 地址的绝妙解决方案。
示例 1:
// Include 'dns' module and create its object
const dns = require('dns');
const website = 'geeksforgeeks.org';
// Call to lookup function of dns
dns.lookup(website, (err, address, family) => {
console.log('address of %s is %j family: IPv%s',
website, address, family);
});
// Execute using $ node
输出:
address of geeksforgeeks.org is "52.25.109.230" family: IPv4
示例 2:
// Include 'dns' module and create its object
var dns = require('dns');
// Call to reverse function along with lookup function.
dns.lookup('www.geeksforgeeks.org',
function onLookup(err, address, family) {
console.log('address:', address);
dns.reverse(address, function (err, hostnames) {
console.log('reverse for ' + address + ': '
+ JSON.stringify(hostnames));
});
});
// Execute using $ node
输出:
address: 52.222.176.140
reverse for 52.222.176.140: ["server-52-222-176-140.bom52.r.cloudfront.net"]
参考:
https://nodejs.org/docs/latest-v9.x/api/dns.html#dns_dns