(DataFlex) Read IMAP Email Headers

Call FetchHeaders to download only the email headers.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoImap
    Boolean iSuccess
    Variant vMessageSet
    Handle hoMessageSet
    Boolean iFetchUids
    Variant vBundle
    Handle hoBundle
    Integer i
    Variant vEmail
    Handle hoEmail
    Integer j
    String sName
    String sAddr
    Integer iNumAttach
    Integer iAttachSize
    String sTemp1
    Integer iTemp1
    Boolean bTemp1

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

    Get Create (RefClass(cComChilkatImap)) To hoImap
    If (Not(IsComObjectCreated(hoImap))) Begin
        Send CreateComObject of hoImap
    End

    // Connect to an IMAP server.
    // Use TLS
    Set ComSsl Of hoImap To True
    Set ComPort Of hoImap To 993
    Get ComConnect Of hoImap "imap.someMailServer.com" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Login
    Get ComLogin Of hoImap "****" "****" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Select an IMAP mailbox
    Get ComSelectMailbox Of hoImap "Inbox" To iSuccess
    If (iSuccess <> True) Begin
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // We can choose to fetch UIDs or sequence numbers.
    Move True To iFetchUids
    // Get the message IDs of all the emails in the mailbox
    Get ComSearch Of hoImap "ALL" iFetchUids To vMessageSet
    If (IsComObject(vMessageSet)) Begin
        Get Create (RefClass(cComChilkatMessageSet)) To hoMessageSet
        Set pvComObject Of hoMessageSet To vMessageSet
    End
    Get ComLastMethodSuccess Of hoImap To bTemp1
    If (bTemp1 <> True) Begin
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // When downloading headers, each email object contains
    // (obviously) the headers, but the body will be missing.
    // Also, attachments will not be included.  However, it is
    // possible to get information about the attachments
    // as well as the complete size of the email.

    Get ComFetchHeaders Of hoImap vMessageSet To vBundle
    If (IsComObject(vBundle)) Begin
        Get Create (RefClass(cComChilkatEmailBundle)) To hoBundle
        Set pvComObject Of hoBundle To vBundle
    End
    Get ComLastMethodSuccess Of hoImap To bTemp1
    If (bTemp1 <> True) Begin
        Send Destroy of hoMessageSet
        Get ComLastErrorText Of hoImap To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    // Loop over the email objects and display information
    // about each:

    Get ComMessageCount Of hoBundle To iTemp1
    For i From 0 To (iTemp1 - 1)

        Get ComGetEmail Of hoBundle i To vEmail
        If (IsComObject(vEmail)) Begin
            Get Create (RefClass(cComChilkatEmail)) To hoEmail
            Set pvComObject Of hoEmail To vEmail
        End

        // Display the From and Subject
        Get ComFrom Of hoEmail To sTemp1
        Showln sTemp1
        Get ComSubject Of hoEmail To sTemp1
        Showln sTemp1

        // Display the recipients:

        Get ComNumTo Of hoEmail To iTemp1
        For j From 0 To (iTemp1 - 1)
            Get ComGetToName Of hoEmail j To sName
            Get ComGetToAddr Of hoEmail j To sAddr
            Showln sName ", " sAddr
        Loop

        Get ComNumCC Of hoEmail To iTemp1
        For j From 0 To (iTemp1 - 1)
            Get ComGetCcName Of hoEmail j To sName
            Get ComGetCcAddr Of hoEmail j To sAddr
            Showln sName ", " sAddr
        Loop

        // Show the total size of the email, including body and attachments:
        Get ComSize Of hoEmail To iTemp1
        Showln iTemp1

        // When a full email is downloaded, we would use the
        // email.NumAttachments property in conjunction with the
        // email.GetMailAttach* methods.
        // However, when an email object contains only the header,
        // we need to access the attachment info differently:
        Get ComGetMailNumAttach Of hoImap vEmail To iNumAttach
        For j From 0 To (iNumAttach - 1)
            Get ComGetMailAttachFilename Of hoImap vEmail j To sTemp1
            Showln sTemp1
            Get ComGetMailAttachSize Of hoImap vEmail j To iAttachSize
            Showln "    size = " iAttachSize " bytes"
        Loop

        Showln "--"
        Send Destroy of hoEmail
    Loop

    // Disconnect from the IMAP server.
    Get ComDisconnect Of hoImap To iSuccess

    Send Destroy of hoMessageSet
    Send Destroy of hoBundle


End_Procedure