(Ruby) Scan for Emails with Attachments and Save Attachments to Files

Scan for emails with attachments and save attachments.

Chilkat Ruby Downloads Ruby Library for Linux and MAC OS X

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

imap = Chilkat::CkImap.new()

# Connect to an IMAP server.
# Use TLS
imap.put_Ssl(true)
imap.put_Port(993)
success = imap.Connect("imap.someMailServer.com")
if (success != true)
    print imap.lastErrorText() + "\n";
    exit
end

# Login
success = imap.Login("myLogin","myPassword")
if (success != true)
    print imap.lastErrorText() + "\n";
    exit
end

# Select an IMAP mailbox
success = imap.SelectMailbox("Inbox")
if (success != true)
    print imap.lastErrorText() + "\n";
    exit
end

# We can choose to fetch UIDs or sequence numbers.
fetchUids = true

# Get the message IDs of all the emails in the mailbox
# messageSet is a CkMessageSet
messageSet = imap.Search("ALL",fetchUids)
if (imap.get_LastMethodSuccess() != true)
    print imap.lastErrorText() + "\n";
    exit
end

# Fetch the email headers into a bundle object:

# bundle is a CkEmailBundle
bundle = imap.FetchHeaders(messageSet)
if (imap.get_LastMethodSuccess() != true)

    print imap.lastErrorText() + "\n";
    exit
end

# Scan for emails with attachments, and save the attachments
# to a sub-directory.

for i in 0 .. bundle.get_MessageCount() - 1

    # email is a CkEmail
    email = bundle.GetEmail(i)

    # Does this email have attachments?
    # Use GetMailNumAttach because the attachments
    # are not actually in the email object because
    # we only downloaded headers.
    # (Had we downloaded the full emails by
    # calling mailman.FetchBundle, we could look
    # at the email object's NumAttachments property.)
    numAttach = imap.GetMailNumAttach(email)

    if (numAttach > 0)
        # Download the entire email and save the
        # attachments. (Remember, we 
        # need to download the entire email because
        # only the headers were previously downloaded.
        # If the entire emails were downloaded by
        # calling FetchBundle instead of FetchHeaders,
        # this would not be necessary.

        # The ckx-imap-uid header field is added when
        # headers are downloaded.  This makes it possible
        # to get the UID from the email object.
        uidStr = email.getHeaderField("ckx-imap-uid")
        uid = uidStr.to_i()

        # fullEmail is a CkEmail
        fullEmail = imap.FetchSingle(uid,true)
        if (imap.get_LastMethodSuccess() == true)
            success = fullEmail.SaveAllAttachments("attachmentsDir")

        end

        for j in 0 .. numAttach - 1
            filename = imap.getMailAttachFilename(email,j)
            print filename + "\n";
        end

    end

end

# Disconnect from the IMAP server.
success = imap.Disconnect()