public override void OnMessage(ConnectionManager connMgr, Message message)
{
try
{
//o Run the message through the GMSEC API-supplied validation
connMgr.GetSpecification().ValidateMessage(message);
//o In this example scenario, we are expecting to receive a
// GMSEC PROD message containing a URI to a location on the disk
// where a product file has been placed for retrieval. In this
// case, we want to validate that the location on the disk is
// in an area which we would expect (i.e. Something that the
// team has agreed upon prior to operational deployment).
//
// By validating this URI, we ensure that no malicious users
// have infiltrated the system and somehow modified the messages
// to cause us to retrieve a file from an unknown location.
//o Start by checking to ensure that this is a PROD message
if (IsProdMsg(message))
{
GMSEC.API.MIST.MESSAGE.ProductFileMessage prodMessage = new GMSEC.API.MIST.MESSAGE.ProductFileMessage(message.ToXML());
//o Extract the Product File URI location(s) from the
// message using a ProductFileIterator
ProductFileIterator prodIter = prodMessage.GetProductFileIterator();
while (prodIter.HasNext())
{
ProductFile prodFile = prodIter.Next();
//o Check to ensure that the URI contains "//hostname/dir"
String prodUri = prodFile.GetURI();
if (prodUri.IndexOf("//hostname/dir") == -1)
{
String errorMsg = "Received an invalid PROD Message (bad URI):\n" + message.ToXML();
throw new GMSEC_Exception(StatusClass.MIST_ERROR, StatusCode.MESSAGE_FAILED_VALIDATION, errorMsg);
}
}
Log.Info("Received a valid message:\n" + message.ToXML());
}
}
catch (Exception e)
{
Log.Error(e.ToString());
}
}
