clj-dnssrv

A Clojure library for looking up DNS SRV records.

Usage

The simplest way to lookup SRV resords for a fully qualified domain name is to just call the lookup function:

(require '[clj-dnssrv.core :as srv])

(srv/lookup "_xmpp-server._tcp.gmail.com")
;; => ({:host "alt4.xmpp-server.l.google.com.", :port 5269}
 {:host "alt1.xmpp-server.l.google.com.", :port 5269}
 {:host "alt2.xmpp-server.l.google.com.", :port 5269}
 {:host "xmpp-server.l.google.com.", :port 5269}
 {:host "alt3.xmpp-server.l.google.com.", :port 5269})

By default the lookup function will use the default DNS resolver with :retain-data, :cache-lookup and a :lookup-timeout of 5000 milliseconds.

Alternatively you can create a new resolver with resolver and pass that to lookup:

(require '[clj-dnssrv.core :as srv])

(def my-resolver (srv/resolver {:cache-lookups true
                                :lookup-timeout-ms 10000
                                :metered true
                                :retain-data true}))

(srv/lookup my-resolver "_xmpp-server._tcp.gmail.com")
;; => ({:host "alt4.xmpp-server.l.google.com.", :port 5269}
 {:host "alt1.xmpp-server.l.google.com.", :port 5269}
 {:host "alt2.xmpp-server.l.google.com.", :port 5269}
 {:host "xmpp-server.l.google.com.", :port 5269}
 {:host "alt3.xmpp-server.l.google.com.", :port 5269})

See the resolver docstring for more details on the configuration options.

License

Copyright © 2014 Lauri Pesonen

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.