TIdMessageDecoderMIME.ReadBody Method

Decodes the contents of a MIME-encode message part.

Pascal

function ReadBody(
    ADestStream: TIdStream; 
    var VMsgEnd: Boolean
): TIdMessageDecoder; override;

Parameters

Parameters	Description
ADestStream	Stream to receive the decode message part contents.
VMsgEnd	Indicates the message terminator was found in the message body.

Returns

TIdMessageDecoder - Decoder used for the message part, or Nil.

Description

ReadBody is a TIdMessageDecoder function used to convert the MIME-encoded contents of an RFC message part to its textual representation.

When BodyEncoded contains True, the ContentTransferEncoding from the TIdMessage instance that owns the decoder is used to create a decoder class instance for the message part. Otherwise, the 'Content-Transfer-Encoding' value in Headers is used to initialize the decoder class instance .

ReadBody returns the TIdMessageDecoder instance to be used for the message part, or Nil when the message part is not an encoded attachment. When an attachment is detected, the content-transfer-encoding header is used to determine the proper decoder.

The following decoders are used based on the content transfer encoding values:

Content Transfer	Decoder Class
base64	TIdDecoderMIME
quoted-printable	TIdDecoderQuotedPrintable
7bit	No decoder is required

ReadBody reads the message part content, one line at a time, using the ReadLnSplit method. If a MIMEBoundary is detected in the line, a new TIdMessageDecoderMIME instance is created for the new message part, and the method is exited. If a message terminator (CRLF + '.' + CRLF) is encountered, VMsgEnd is set to True and the method is exited.

ReadBody uses the message decoder, when present, to convert the encoded data for the message part. Decoded message part contents are written to ADestStream until a blank line (or message terminator) is read from the encoded message part.