コード例 #1
0
        /*
         * Authenticates a user by checking if there is a record in the DB
         * where the useranme and password match
         */
        private bool AuthenticateUser(User user, out User authedUser, NetworkStream stream)
        {
            bool auth  = false;
            User found = null;

            using (ViaChatEntities db = new ViaChatEntities())
            {
                var query = from u in db.Users
                            where u.username == user.username &&
                            u.password == user.password
                            select u;

                if (query.FirstOrDefault <User>() != null)
                {
                    auth  = true;
                    found = query.FirstOrDefault <User>();
                    SendResponse(true, "", stream);
                }
                else
                {
                    SendResponse(false, "No user found with those credentials.", stream);
                }
            }

            authedUser = found;

            return(auth);
        }
コード例 #2
0
        /*
         * Saves a message in the database
         */
        private bool SaveMessage(Message msg, User user, NetworkStream stream)
        {
            bool success = true;

            byte[] receiveBuffer = new Byte[2];

            using (ViaChatEntities db = new ViaChatEntities())
            {
                msg.user_id = user.id;
                db.Messages.Add(msg);
                try
                {
                    db.SaveChanges();
                    SendResponse(true, "", stream);
                }
                catch (Exception e)
                {
                    success = false;
                    SendResponse(false, e.ToString(), stream);
                    Console.WriteLine(e);
                }
            }

            stream.Read(receiveBuffer, 0, receiveBuffer.Length); //Wait for user to receive message confirmation

            return(success);
        }
コード例 #3
0
        private User FindUser(string username)
        {
            /*
             * Returns the user having the corresponding username
             */
            using (ViaChatEntities context = new ViaChatEntities())
            {
                var query = from u in context.Users
                            where u.username == username
                            select u;

                return(query.FirstOrDefault <User>());
            }
        }
コード例 #4
0
        private void SendMessageHistory(NetworkStream stream, User authedUser)
        {
            ViaChatEntities context = new ViaChatEntities();

            byte[] nbMessages = BitConverter.GetBytes(context.Messages.Count <Message>());

            stream.Write(nbMessages, 0, nbMessages.Length); //Send number of messages to be read

            foreach (Message message in context.Messages)
            {
                string body          = message.body;
                string username      = message.User.id != authedUser.id ? message.User.username : "******";
                byte[] historyEntry  = Encoding.ASCII.GetBytes(username + ": " + body + "\n");
                byte[] receiveBuffer = new Byte[2];

                stream.Write(historyEntry, 0, historyEntry.Length); //Writes the message body in the stream

                //RECEIVE OKAY BEFORE CONTINUING, otherwise the server sends all the messages at once, before the client has time to parse them one by one
                stream.Read(receiveBuffer, 0, receiveBuffer.Length);
            }
        }
コード例 #5
0
        /*
         * Registers a user in the database
         * Returns true if success
         */
        private bool RegisterUser(User user, NetworkStream stream)
        {
            bool success = true;

            using (ViaChatEntities db = new ViaChatEntities())
            {
                db.Users.Add(user);
                try
                {
                    db.SaveChanges();
                    SendResponse(true, "", stream);
                }
                catch (Exception e)
                {
                    success = false;
                    SendResponse(false, e.ToString(), stream);
                    Console.WriteLine(e);
                }
            }

            return(success);
        }