Internet Direct (Indy) Version 9.0.1 Beta
TIdEntityHeaderInfo.RawHeaders
Contains message header names and values in their original form.

property RawHeaders: TIdHeaderList;
Description
RawHeaders is a read-only TIdHeaderList property that contains the message header names and values in their original form, as received in the HTTP message. Use TIdEntityHeaderInfo properties, including CustomHeaders and RawHeaders, to access header values.