Gmail Poll IMAP

gistfile1.rb

def self.perform
    imap = Net::IMAP.new('imap.gmail.com', 993, true)
    imap.login('MAILBOX', 'PASSWORD')

    loop do
      imap.select('INBOX')
      imap.search(['UNSEEN']).each do |message_id|
        messages = imap.fetch(message_id, ['RFC822'])

        messages.each do |message|
          m = TMail::Mail.parse message.attr['RFC822']

          m.body =~ /To\:\[BJ\-(\d+)\].*\r\n/
          fax_metadata_id = $1.to_i

          next unless fax_metadata_id

          fax_metadata = FaxMetadata.find(fax_metadata_id)

          fax_metadata.was_successful = !(m.subject =~ /^Fax Delivery Successful/).nil?

          fax_metadata.save!
        end
      end
      sleep 5
    end

    imap.logout
    # imap.disconnect
  end

I assume you found my comments about why IMAP IDLE looks like a great way to do this, but it ends up sucking? ;) (For more fun background, search for "IMAP IDLE" in the codebase from which you pulled this gist ;) )

I'm not using IMAP IDLE - I'm just polling the inbox every 5 seconds (for now), I just wanted to get rid of the SSL overhead of logging in each time we want to check, and so far in testing, it's been working pretty well .... so far. I saw your comment and looked up IMAP IDLE but it seems like unnecessary added complexity for a mailbox that has way too little traffic. IMAP IDLE has more to do with "push", something we don't need, when polling every few seconds serves the same purpose.

If you dig through the git logs you should see where I try to implement IMAP IDLE... but then fail because of the mentioned deadlocks and/or concurrency issues. But there might be sample code hidden in the history.

Regardless, it is kind of interesting. :)