DataFlex

B-Encode a String for MIME Headers

Demonstrates the Chilkat Email.BEncodeString method, which converts the Unicode string in the first argument to the charset named in the second argument, B-encodes the resulting multibyte data, and returns the encoded string. This is the representation used for non-ASCII text in MIME header fields.

Background: MIME headers were defined to carry only plain ASCII, so non-ASCII text (accents, non-Latin scripts) must be wrapped in an "encoded-word" per RFC 2047. The B encoding is Base64-based: the text becomes something like =?utf-8?B?...?=, which mail software recognizes and decodes back to the original characters. There is also a Q (quoted-printable-style) encoding for the same purpose; B-encoding is preferred when most characters are non-ASCII.

Chilkat DataFlex Downloads

Download Chilkat for DataFlex

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Handle hoEmail
    String sEncoded

    //  Demonstrates the BEncodeString method, which converts a Unicode string to a specified
    //  charset, B-encodes (RFC 2047) the resulting bytes, and returns the encoded string.
    //  This is the form used for non-ASCII text in MIME header fields.

    Get Create (RefClass(cComChilkatEmail)) To hoEmail
    If (Not(IsComObjectCreated(hoEmail))) Begin
        Send CreateComObject of hoEmail
    End

    //  B-encode a Unicode string using the utf-8 charset.
    Get ComBEncodeString Of hoEmail "Cafe Meeting Notes" "utf-8" To sEncoded

    Showln "B-encoded: " sEncoded


End_Procedure