Header Event
Fired every time a header line comes in.
Syntax
type THeaderEvent = procedure ( Sender: TObject; const Field: String; const Value: String ) of Object;
property OnHeader: THeaderEvent read FOnHeader write FOnHeader;
Remarks
The Field parameter contains the name of the HTTP header (same case as it is delivered). The Value parameter contains the header contents.
If the header line being retrieved is a continuation header line, then the Field parameter contains '' (empty string).