VOOZH about

URL: https://www.geeksforgeeks.org/node-js/node-js-dnspromises-resolveany-method/

⇱ Node.js dnsPromises.resolveAny() Method - GeeksforGeeks

  • Courses
  • Tutorials
  • Interview Prep

Node.js dnsPromises.resolveAny() Method

Last Updated : 13 Oct, 2021
The dnsPromises.resolveAny() method is an inbuilt application programming interface of the promises object of dns module which is used to resolve all records (i.e. 'ANY' or '*') for the specified hostname using DNS protocol. Syntax: 
dnsPromises.resolveAny( hostname )
Parameters: This method accepts a single parameter as mentioned above and described below:
  • hostname: This parameter specifies a string which denotes the hostname to be resolved.
Return: This method returns error, records. Records that may be returned are among
  • A: IPv4 address
  • AAAA: IPv6 address
  • ANY: Any records
  • CNAME: canonical name records
  • MX: mail exchange records
  • NAPTR: name authority pointer records
  • NS: name server records
  • PTR: pointer records
  • SOA: start of authority records
  • SRV: service records
  • TXT: text records
Below examples illustrate the use of dnsPromises.resolveAny() method in Node.js: Example 1: Output: 
for localhost :
[ { address: '127.0.0.1', ttl: 0, type: 'A' } ]
for geeksforgeeks :
[ { exchange: 'alt1.aspmx.l.google.com', priority: 5, type: 'MX' },
 { exchange: 'alt2.aspmx.l.google.com', priority: 5, type: 'MX' },
 { exchange: 'aspmx.l.google.com', priority: 1, type: 'MX' },
 { exchange: 'alt3.aspmx.l.google.com', priority: 10, type: 'MX' },
 { exchange: 'alt4.aspmx.l.google.com', priority: 10, type: 'MX' },
 { value: 'ns-1520.awsdns-62.org', type: 'NS' },
 { value: 'ns-1569.awsdns-04.co.uk', type: 'NS' },
 { value: 'ns-245.awsdns-30.com', type: 'NS' },
 { value: 'ns-869.awsdns-44.net', type: 'NS' },
 { entries:
 [ 'v=spf1 include:amazonses.com include:_spf.google.com -all' ],
 type: 'TXT' },
 { entries: [ 'fob1m1abcdp777bf2ncvnjm08n' ], type: 'TXT' },
 { nsname: 'ns-869.awsdns-44.net',
 hostmaster: 'awsdns-hostmaster.amazon.com',
 serial: 1,
 refresh: 7200,
 retry: 900,
 expire: 1209600,
 minttl: 86400,
 type: 'SOA' } ]
Example 2: Output: 
from async:
[ { exchange: 'alt4.aspmx.l.google.com', priority: 10, type: 'MX' },
 { exchange: 'alt1.aspmx.l.google.com', priority: 5, type: 'MX' },
 { exchange: 'alt2.aspmx.l.google.com', priority: 5, type: 'MX' },
 { exchange: 'aspmx.l.google.com', priority: 1, type: 'MX' },
 { exchange: 'alt3.aspmx.l.google.com', priority: 10, type: 'MX' },
 { value: 'ns-869.awsdns-44.net', type: 'NS' },
 { value: 'ns-1520.awsdns-62.org', type: 'NS' },
 { value: 'ns-245.awsdns-30.com', type: 'NS' },
 { value: 'ns-1569.awsdns-04.co.uk', type: 'NS' },
 { entries:
 [ 'v=spf1 include:amazonses.com include:_spf.google.com -all' ],
 type: 'TXT' },
 { entries: [ 'fob1m1abcdp777bf2ncvnjm08n' ], type: 'TXT' },
 { nsname: 'ns-869.awsdns-44.net',
 hostmaster: 'awsdns-hostmaster.amazon.com',
 serial: 1,
 refresh: 7200,
 retry: 900,
 expire: 1209600,
 minttl: 86400,
 type: 'SOA' } ]
Note: The above program will compile and run by using the node index.js command. Reference: https://nodejs.org/api/dns.html#dns_dnspromises_resolveany_hostname
Comment

Explore