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

Scan for emails with attachments and save attachments.

Chilkat Go Downloads Go Package for Windows, MacOS, Linux, Alpine Linux, Solaris

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

    imap := chilkat.NewImap()

    // Connect to an IMAP server.
    // Use TLS
    imap.SetSsl(true)
    imap.SetPort(993)
    success := imap.Connect("imap.someMailServer.com")
    if success != true {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Login
    success = imap.Login("myLogin","myPassword")
    if success != true {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Select an IMAP mailbox
    success = imap.SelectMailbox("Inbox")
    if success != true {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // messageSet is a MessageSet
    // We can choose to fetch UIDs or sequence numbers.
    fetchUids := true

    // Get the message IDs of all the emails in the mailbox
    messageSet := imap.Search("ALL",fetchUids)
    if imap.LastMethodSuccess() != true {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Fetch the email headers into a bundle object:
    // bundle is a EmailBundle
    bundle := imap.FetchHeaders(messageSet)
    if imap.LastMethodSuccess() != true {
        messageSet.DisposeMessageSet()
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    // Scan for emails with attachments, and save the attachments
    // to a sub-directory.
    var i int
    for i = 0; i <= bundle.MessageCount() - 1; i++ {
        // email is a Email
        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 := int(*uidStr)

            // fullEmail is a Email
            fullEmail := imap.FetchSingle(uid,true)
            if imap.LastMethodSuccess() == true {
                success = fullEmail.SaveAllAttachments("attachmentsDir")
                fullEmail.DisposeEmail()
            }

            var j int
            for j = 0; j <= numAttach - 1; j++ {
                filename := imap.GetMailAttachFilename(email,j)
                fmt.Println(*filename)
            }

        }

        email.DisposeEmail()
    }

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

    messageSet.DisposeMessageSet()
    bundle.DisposeEmailBundle()

    imap.DisposeImap()