Protocol buffer class added

package DataImporter_ns;

message Request

{

	//Request type descriptor

	enum Type

	{

		AUTHORIZATION = 0;

		DATA = 1;

	}

	required Type type = 1;

	//Authorization request

	message Authorization

	{

		required string username = 1;

		required string password = 2;

	}

	optional Authorization authorization = 2;

	//Data request

	message Data

	{

		required string file_path = 1;

		required int32 file_version = 2;

		required string file_name = 3;

	}

}

package DataImporter_ns;

message Response

{

	//Response type descriptor

	enum Type

	{

		AUTHORIZATION = 0;

		DATA = 1;

	}

	required Type type = 1;

	//Authorization response

	message Authorization

	{

		enum State

		{

			ACCEPTED = 0;

			REJECTED = 1;

		}

		required State state = 1;

		required string status = 2;

	}

	optional Authorization authorization = 2;

	//Data response

	message Data

	{

		enum State

		{

			ACCEPTED = 0;

			REJECTED = 1;

		}

		required State state = 1;

		required string status = 2;

		required uint64 size = 3;

	}

}