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Issue DNS lookups for Dat archives using HTTPS requests to the target host. [ DEPRECATED - see https://github.com/martinheidegger/hyper-dns for similar functionality. More info on active projects and modules at https://dat-ecosystem.org/ ]

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deprecated See hyper-dns for similar functionality.

More info on active projects and modules at dat-ecosystem.org


dat-dns

Issue DNS lookups for Dat archives using HTTPS requests to the target host. Keeps an in-memory cache of recent lookups.

API

var datDns = require('dat-dns')()

// or, if you have a custom protocol
var datDns = require('dat-dns')({
    recordName: /* name of .well-known file */
    protocolRegex: /* RegExp object for custom protocol */,
    hashRegex: /* RegExp object for custom hash i.e. */,
    txtRegex: /* RegExp object for DNS TXT record of custom protocol */,
})

// example: 
var cabalDns = require('dat-dns')({
    recordName: 'cabal',
    hashRegex: /^[0-9a-f]{64}?$/i,
    protocolRegex: /^cabal:\/\/([0-9a-f]{64})/i,
    txtRegex: /^"?cabalkey=([0-9a-f]{64})"?$/i
})

// resolve a name: pass the hostname by itself
datDns.resolveName('foo.com', function (err, key) { ... })
datDns.resolveName('foo.com').then(key => ...)

// dont use cached 'misses'
datDns.resolveName('foo.com', {ignoreCachedMiss: true})

// dont use the cache at all
datDns.resolveName('foo.com', {ignoreCache: true})

// dont use dns-over-https
datDns.resolveName('foo.com', {noDnsOverHttps: true})

// dont use .well-known/dat
datDns.resolveName('foo.com', {noWellknownDat: true})

// list all entries in the cache
datDns.listCache()

// clear the cache
datDns.flushCache()

// configure the DNS-over-HTTPS host used
var datDns = require('dat-dns')({
  dnsHost: 'dns.google.com',
  dnsPath: '/resolve'
})

// use a persistent fallback cache
// (this is handy for persistent dns data when offline)
var datDns = require('dat-dns')({
  persistentCache: {
    read: async (name, err) => {
      // try lookup
      // if failed, you can throw the original error:
      throw err
    },
    write: async (name, key, ttl) => {
      // write to your cache
    }
  }
})

// emits some events, mainly useful for logging/debugging
datDns.on('resolved', ({method, name, key}) => {...})
datDns.on('failed', ({method, name, err}) => {...})
datDns.on('cache-flushed', () => {...})

Spec

In detail.

Option 1 (DNS-over-HTTPS). Create a DNS TXT record witht he following schema:

datkey={key}

Option 2 (.well-known/dat). Place a file at /.well-known/dat with the following schema:

{dat-url}
TTL={time in seconds}

TTL is optional and will default to 3600 (one hour). If set to 0, the entry is not cached.

About

Issue DNS lookups for Dat archives using HTTPS requests to the target host. [ DEPRECATED - see https://github.com/martinheidegger/hyper-dns for similar functionality. More info on active projects and modules at https://dat-ecosystem.org/ ]

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