B4X

Fetch an IMAP Message's MIME into a BinData

Demonstrates the Chilkat Imap.FetchSingleBd method, which downloads one message's MIME bytes into a BinData object. If the second argument (bUid) is true, the first argument is a UID; otherwise it is a sequence number. This example downloads message 1's MIME into a BinData and prints the byte count.

Background: This is the binary counterpart to FetchSingleAsMime (which returns a string). A BinData holds raw bytes, so it preserves the message exactly — the right choice when you plan to write the MIME straight to a file, hash it, or hand it to an API expecting a byte buffer, with no charset conversion that could alter binary content.

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Dim success As Boolean = False

'  Demonstrates the Imap.FetchSingleBd method, which downloads one message's MIME bytes into a
'  BinData object.  If the 2nd argument (bUid) is True, the 1st argument is a UID; otherwise
'  it is a sequence number.

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

imap.Ssl = True
imap.Port = 993

success = imap.Connect("imap.example.com")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If

success = imap.Login("user@example.com", "myPassword")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


success = imap.SelectMailbox("Inbox")
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


'  Download message sequence number 1's MIME bytes into a BinData.  bUid = False.
Dim bdMime As ChilkatBinData
bdMime.Initialize
success = imap.FetchSingleBd(1, False, bdMime)
If success = False Then
    Log(imap.LastErrorText)
    Return
End If


Log("MIME size (bytes) = " & bdMime.NumBytes)

success = imap.Disconnect
If success = False Then
    Log(imap.LastErrorText)
    Return
End If