class dnspromises resolver

一个DNS请求的独立解析器。

创建新的解析器将使用默认服务器设置。使用[resolver.setServers()][dnsPromises.setServers()]设置解析器的服务器并不会影响其他的解析器：

const { Resolver } = require('dns').promises;
const resolver = new Resolver();
resolver.setServers(['4.4.4.4']);
// 该请求使用4.4.4.4的服务器，独立于全局设置。
resolver.resolve4('example.org').then((addresses) => {
  // ...
});
// 或者, 你可以用`async-await`编写异步代码。
(async function() {
  const addresses = await resolver.resolve4('example.org');
})();

以下是dns.Promises API提供的方法。

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