You can customize the response of HTTP.SYS server using the CustomHeaders property of response object.
Just set the value of CustomHeaders with the Header Name + Header Value separated by NewLine Characters.
Example: if you want to add the following headers, find below a sample code
Access-Control-Allow-Origin: *
Acces-Control-Allow-Methods: GET, POST, OPTIONS, PUT, PATCH, DELETE
procedure OnHTTPRequest(aConnection: TsgcWSConnection_HTTPAPI; const aRequestInfo: THttpServerRequest;
var aResponseInfo: THttpServerResponse);
begin
aResponseInfo.ResponseNo := 200;
aResponseInfo.CustomHeaders := 'Access-Control-Allow-Origin: *' + #13#10 + 'Acces-Control-Allow-Methods: ' +
'GET, POST, OPTIONS, PUT, PATCH, DELETE';
end;