(Ruby) Get the Email Received Date/Time

Get's the date/time from the topmost Received header. The date/time of when you received an email may be different than the date/time stored in the Date header field, which if truthful, is the date when the email was sent.

The Received header field will look something like this:

Received: from mail.example.com (mail.example.com [99.255.255.99])
 by inbound-smtp.us-west-2.amazonaws.com with SMTP id 72ma443vs1g0o6vqd8erojkpss35s0dt32h323o1
 for admin@chilkatsoft.com;
 Wed, 25 Jul 2018 08:04:23 +0000 (UTC)

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

require 'chilkat'

email = Chilkat::CkEmail.new()

success = email.LoadEml("qa_data/eml/p.eml")
if (success != true)
    print email.lastErrorText() + "\n";
    exit
end

sb = Chilkat::CkStringBuilder.new()
sb.Append(email.getHeaderField("Received"))

#  Replace semicolons with CRLF's
numReplaced = sb.Replace(";","\r\n")

st = Chilkat::CkStringTable.new()
st.AppendFromSb(sb)

if (st.get_Count() == 0)
    print "Should have at least one line.." + "\n";
    exit
end

#  The date/time string is the last line in the string table.
sb.SetString(st.stringAt(st.get_Count() - 1))
sb.Trim()

print "Received date/time = " + sb.getAsString() + "\n";