@multiformats/dns


> Resolve DNS queries with browser fallback

About

Query DNS records using node:dns, DNS over HTTP and/or DNSJSON over HTTP.

A list of publicly accessible servers can be found here.

Example - Using the default resolver

``TypeScript
import { dns } from '@multiformats/dns'

const resolver = dns()

// resolve A records with a 5s timeout
const result = await dns.query('google.com', {
signal: AbortSignal.timeout(5000)
})
`

Example - Using per-TLD resolvers

`TypeScript
import { dns } from '@multiformats/dns'
import { dnsJsonOverHttps } from '@multiformats/dns/resolvers'

const resolver = dns({
resolvers: {
// will only be used to resolve .com addresses
'com.': dnsJsonOverHttps('https://cloudflare-dns.com/dns-query'),

// this can also be an array, resolvers will be shuffled and tried in
// series
'net.': [
dnsJsonOverHttps('https://dns.google/resolve'),
dnsJsonOverHttps('https://dns.pub/dns-query')
],

// will only be used to resolve all other addresses
'.': dnsJsonOverHttps('https://dnsforge.de/dns-query'),
}
})
`

Example - Query for specific record types

`TypeScript
import { dns, RecordType } from '@multiformats/dns'

const resolver = dns()

// resolve only TXT records
const result = await dns.query('google.com', {
types: [
RecordType.TXT
]
})
`

Caching

Individual Aanswers are cached so. If you make a request, for which all
record types are cached, all values will be pulled from the cache.

If any of the record types are not cached, a new request will be resolved as
if none of the records were cached, and the cache will be updated to include
the new results.

Example - Ignoring the cache

`TypeScript
import { dns, RecordType } from '@multiformats/dns'

const resolver = dns()

// do not used cached results, always resolve a new query
const result = await dns.query('google.com', {
cached: false
})
`

Install

`console
$ npm i @multiformats/dns
`

Browser
``

API Docs

-

License

Licensed under either of

- Apache 2.0, (LICENSE-APACHE / )
- MIT (LICENSE-MIT / )

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.