dns.resolve(hostname[, rrtype], callback)


使用域名系统协议将主机名(例如 'nodejs.org')解析为资源记录数组。callback 函数有参数 (err, records)。当成功时,records 将是资源记录数组。个别结果的类型和结构因 rrtype 而异:

¥Uses the DNS protocol to resolve a host name (e.g. 'nodejs.org') into an array of the resource records. The callback function has arguments (err, records). When successful, records will be an array of resource records. The type and structure of individual results varies based on rrtype:

rrtyperecords 包含结果类型速记法
'A'IPv4 地址(默认)<string>dns.resolve4()
'AAAA'IPv6 地址<string>dns.resolve6()
'ANY'任何记录<Object>dns.resolveAny()
'CAA'CA 授权记录<Object>dns.resolveCaa()
'CNAME'规范名称记录<string>dns.resolveCname()
'MX'邮件交换记录<Object>dns.resolveMx()
'NAPTR'名称权限指针记录<Object>dns.resolveNaptr()
'NS'名称服务器记录<string>dns.resolveNs()
'PTR'指针记录<string>dns.resolvePtr()
'SOA'权限记录的开始<Object>dns.resolveSoa()
'SRV'服务记录<Object>dns.resolveSrv()
'TLSA'证书关联<Object>dns.resolveTlsa()
'TXT'文本记录<string[]>dns.resolveTxt()

出错时,err 是一个 Error 对象,其中 err.codeDNS 错误代码 之一。

¥On error, err is an Error object, where err.code is one of the DNS error codes.