(Ruby) Transition from MailMan.MxLookup to Dns.Query

Provides instructions for replacing deprecated MxLookup method calls with the Chilkat Dns class.

Note: This example requires Chilkat v11.0.0 or greater.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

mailman = Chilkat::CkMailMan.new()

# ...
# ...

emailAddr = "joe@example.com"

# ------------------------------------------------------------------------
# The MxLookup method is deprecated:

domain = mailman.mxLookup(emailAddr)
if (mailman.get_LastMethodSuccess() == false)
    print mailman.lastErrorText() + "\n";
    exit
end

# ------------------------------------------------------------------------
# Do the equivalent using the Chilkat DNS class

dns = Chilkat::CkDns.new()

json = Chilkat::CkJsonObject.new()

# This gets all MX domains for an email address.  (Typically one domain.)
# The preferred domain will be at index 0 (see below).
success = dns.Query("MX",emailAddr,json)
if (success == false)
    print dns.lastErrorText() + "\n";
    exit
end

i = 0
count_i = json.SizeOfArray("answer.mx")
while i < count_i
    json.put_I(i)
    domain = json.stringOf("answer.mx[i].domain")
    print domain + "\n";
    i = i + 1
end