Fetch a Single Message's MIME into a StringBuilder

See more IMAP Examples

Demonstrates the Chilkat Imap.FetchSingleAsMimeSb method, which downloads one message's MIME into a StringBuilder. The first argument is the message id, the second (bUid) selects UID vs sequence number, and the third is the StringBuilder, which is cleared first. This example downloads a message by UID and prints the MIME length.

Background: Chilkat interprets the received MIME as UTF-8. Messages using Base64 or quoted-printable transfer encoding are safe because their encoded bytes are ASCII. Raw 8bit or binary content, or unencoded text in a charset such as ISO-8859-1 or Shift_JIS, can be misinterpreted — in those cases use FetchSingleBd to get the exact bytes.

Chilkat Go Downloads

Download Chilkat for Go

    success := false

    //  Demonstrates the Imap.FetchSingleAsMimeSb method, which downloads one message's MIME into a
    //  StringBuilder.  The 1st argument is the message id, the 2nd (bUid) selects UID vs sequence
    //  number, and the 3rd is the StringBuilder (cleared first).

    imap := chilkat.NewImap()

    imap.SetSsl(true)
    imap.SetPort(993)

    success = imap.Connect("imap.example.com")
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    success = imap.Login("user@example.com","myPassword")
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    success = imap.SelectMailbox("Inbox")
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        return
    }

    //  Search for the message ids to download, returning UIDs.
    wantUids := true
    msgSet := chilkat.NewMessageSet()
    success = imap.QueryMbx("ALL",wantUids,msgSet)
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        msgSet.DisposeMessageSet()
        return
    }

    if msgSet.Count() > 0 {
        uid := msgSet.GetId(0)

        //  Download the message's MIME into a StringBuilder.  The id is a UID.
        useUid := true
        sbMime := chilkat.NewStringBuilder()
        success = imap.FetchSingleAsMimeSb(uid,useUid,sbMime)
        if success == false {
            fmt.Println(imap.LastErrorText())
            imap.DisposeImap()
            msgSet.DisposeMessageSet()
            sbMime.DisposeStringBuilder()
            return
        }

        fmt.Println("MIME length: ", sbMime.Length(), " chars")
    }

    success = imap.Disconnect()
    if success == false {
        fmt.Println(imap.LastErrorText())
        imap.DisposeImap()
        msgSet.DisposeMessageSet()
        sbMime.DisposeStringBuilder()
        return
    }


    imap.DisposeImap()
    msgSet.DisposeMessageSet()
    sbMime.DisposeStringBuilder()