B4X Requires Chilkat v11.0.0+

Scan for Emails with Attachments and Save Attachments to Files

Scan for emails with attachments and save attachments. B4X

Dim success As Boolean = False

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

Dim imap As ChilkatImap
imap.Initialize("imap")

'  Connect to an IMAP server.
'  Use TLS
imap.Ssl = True
imap.Port = 993
success = imap.Connect("imap.example.com")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  Login
success = imap.Login("myLogin", "myPassword")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  Select an IMAP mailbox
success = imap.SelectMailbox("Inbox")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  We can choose to fetch UIDs or sequence numbers.
Dim fetchUids As Boolean = True

'  Get the message IDs of all the emails in the mailbox
Dim messageSet As ChilkatMessageSet
messageSet.Initialize
success = imap.QueryMbx("ALL", fetchUids, messageSet)
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  Fetch the email headers into a bundle object:
Dim bundle As ChilkatEmailBundle
bundle.Initialize
Dim headersOnly As Boolean = True
success = imap.FetchMsgSet(headersOnly, messageSet, bundle)
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  Scan for emails with attachments, and save the attachments
'  to a sub-directory.
Dim fullEmail As ChilkatEmail
fullEmail.Initialize
Dim emailHeader As ChilkatEmail
emailHeader.Initialize
Dim i As Int = 0
Do While 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.
    Dim numAttach As Int = imap.GetMailNumAttach(emailHeader)

    If numAttach > 0 Then
        '  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.
        Dim uidStr As String = emailHeader.GetHeaderField("ckx-imap-uid")
        Dim uid As Int = uidStr

        success = imap.FetchEmail(False, uid, True, fullEmail)
        If success = False Then
            Log(imap.LastErrorText)
            Return
        End If


        success = fullEmail.SaveAllAttachments("attachmentsDir")

        Dim j As Int
        For j = 0 To numAttach - 1
            Dim filename As String = imap.GetMailAttachFilename(emailHeader, j)
            Log(filename)
        Next

    End If


    i = i + 1
Loop

'  Disconnect from the IMAP server.
success = imap.Disconnect