class dns resolver

DNS 请求的独立解析程序。

使用默认的设置创建一个新的解析程序。 使用 [resolver.setServers()][dns.setServers()] 为解析程序设置使用的服务器，则不会影响其他的解析程序：

const { Resolver } = require('dns');
const resolver = new Resolver();
resolver.setServers(['4.4.4.4']);
// 此请求将使用 4.4.4.4 中的服务器，与全局设置无关。
resolver.resolve4('example.org', (err, addresses) => {
  // ...
});

可以使用的 dns 模块的方法如下：

• [resolver.getServers()][dns.getServers()]
• [resolver.resolve()][dns.resolve()]
• [resolver.resolve4()][dns.resolve4()]
• [resolver.resolve6()][dns.resolve6()]
• [resolver.resolveAny()][dns.resolveAny()]
• [resolver.resolveCname()][dns.resolveCname()]
• [resolver.resolveMx()][dns.resolveMx()]
• [resolver.resolveNaptr()][dns.resolveNaptr()]
• [resolver.resolveNs()][dns.resolveNs()]
• [resolver.resolvePtr()][dns.resolvePtr()]
• [resolver.resolveSoa()][dns.resolveSoa()]
• [resolver.resolveSrv()][dns.resolveSrv()]
• [resolver.resolveTxt()][dns.resolveTxt()]
• [resolver.reverse()][dns.reverse()]
• [resolver.setServers()][dns.setServers()]