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In the sections that follow, you ll see how to build a login form, authenticate users, construct an authentication ticket, fill that authentication ticket with role information, and parse that role information out on subsequent requests so you can use it on the pages in your application.

Before you can let people log in to your application, you need a login form, and almost every login page ever built has two text boxes to allow people to entire their username and password. Our login form has both of these entry controls as well as a Remember Me check box that allows users to decide whether they want the application to remember their login information when they close down the browser. This allows them to return to your application and use it without having to log back in. The login form also has two login buttons. One demonstrates how to log in by placing role information directly in the authentication ticket, and the other demonstrates how to log in without placing role information in the authentication ticket. Listing 5-3 provides the definitions for the controls in the login form without any visual or layout formatting. Listing 5-3. Textbox Controls for a Username and Password <asp:TextBox runat="server" ID="txtUsername" /> <asp:TextBox runat="server" ID="txtPassword" TextMode="password" /> <asp:Button runat="server" ID="btnLogin" Text="Login with Roles" /> <asp:Button runat="server" ID="btnLoginNoRoles" Text="Login without Roles" /> After users enter their login credentials you have to authenticate those users by checking their credentials against a data store. We ll tackle that next.

One aspect of manually implementing Forms Authentication is writing the code to authenticate users by validating their login credentials. Normally, you authenticate users against a database of usernames and passwords using a standard SQL query. For the sake of simplicity, the usernames and passwords are hard-coded directly in the sample application as shown in Listing 5-4. Listing 5-4. Example Authentication Method '*************************************************************************** Private Function AuthenticateUser(ByVal Username As String, _ ByVal Password As String) As Boolean Select Case UCase(Username) Case "BOB" : Return CBool(Password = "bobpassword") Case "JANE" : Return CBool(Password = "janepassword") Case "MARK" : Return CBool(Password = "markpassword") Case Else : Return False End Select End Function This method accepts a username and password and then checks to see if the username and password match any of the three hard-coded users in the sample application. The

AudioManager uses a HashMap for clip caching: HashMap<String, AudioClip> mSounds = new HashMap<String, AudioClip>(); When a sound request comes along, the method void startSound(int sidx) will be invoked where sidx is the ID of the native sound. Next, the Android resource ID will be extracted using the SoundNames class: int id = SoundNames.Sounds[sidx]; Finally, the cache table will be queried. If the table contains the sound, it will be played from cache. Otherwise, the sound will be loaded from disk and cached for the next event: if (mSounds.containsKey(key)) {

Handles the error by publishing the message passed to it Handles the error by publishing the error information, including the Java exception being thrown and the integer error code describing the problem Handles the error by publishing the error message, the exception, the integer error code, and the logging event that generated the error Sets the appender for which the error is handled Sets the backup appender to fall back to in case the primary appender fails Sets the reference of the logger to which the failing appender might be attached

username is not case sensitive because the method forces it into uppercase before checking it, but the passwords are case sensitive.