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

Scan for emails with attachments and save attachments.

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

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

    success := false

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

    imap := Imap_Ref.html">chilkat.NewImap()

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

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

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

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

    // Get the message IDs of all the emails in the mailbox
    messageSet := MessageSet_Ref.html">chilkat.NewMessageSet()
    success = imap.QueryMbx("ALL",fetchUids,messageSet)
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        messageSet.DisposeMessageSet()
        return
    }

    // Fetch the email headers into a bundle object:
    bundle := EmailBundle_Ref.html">chilkat.NewEmailBundle()
    headersOnly := true
    success = imap.FetchMsgSet(headersOnly,messageSet,bundle)
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        messageSet.DisposeMessageSet()
        bundle.DisposeEmailBundle()
        return
    }

    // Scan for emails with attachments, and save the attachments
    // to a sub-directory.
    fullEmail := Email_Ref.html">chilkat.NewEmail()
    emailHeader := Email_Ref.html">chilkat.NewEmail()
    i := 0
    for i < bundle.MessageCount() {
        // The bundle contains email headers..
        bundle.EmailAt(i,emailHeader)

        // Does this email have attachments?
        // Use GetMailNumAttach because the attachments
        // are not actually in the email object because
        // we only downloaded headers.
        numAttach := imap.GetMailNumAttach(emailHeader)

        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.

            // 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 := emailHeader.GetHeaderField("ckx-imap-uid")
            uid := int(*uidStr)

            success = imap.FetchEmail(false,uid,true,fullEmail)
            if success == false {
                fmt.Println(imap.LastErrorText())
                imap.DisposeImap()
                messageSet.DisposeMessageSet()
                bundle.DisposeEmailBundle()
                fullEmail.DisposeEmail()
                emailHeader.DisposeEmail()
                return
            }

            success = fullEmail.SaveAllAttachments("attachmentsDir")

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

        }

        i = i + 1
    }

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

    imap.DisposeImap()
    messageSet.DisposeMessageSet()
    bundle.DisposeEmailBundle()
    fullEmail.DisposeEmail()
    emailHeader.DisposeEmail()