In another case, the server will redirect the client to the error page. After the user has filled out the form and sent its credentials to the server, the authentication mechanism will start.Īfter the user authentication succeeds, the server will check the roles of the user, and if the security constraint allows at least one of them, the server will redirect the client to the requested URL. If the server doesn't contain a valid SSO session ID, the server will redirect the client to the logging form. To understand what will happen on the server when it receives a request from a protected resource of a FORM authenticated web app, let's summarize the flow of this authentication mechanism.įirst of all, the client requests a protected resource. Here we can see an example of what it must look like: This is to achieve that the login form works with all kinds of resources and to remove the need to configure the action field of the outbound form in the server. They must be j_security_check, j_username, and j_password. The login page must follow some strict rules defined in the Login Form Notes of the servlet specification 2.3 because we can choose neither the names of the form nor the input fields. For instance, this method will be useful when we want to customize the login page to look like the web app, and the configuration will look like this: FORM authentication method requires a login form, and the login failed the web page. We need to modify the tomcat-users.xml file: Īt the ping web app, we use the FORM authentication method. The resource will instantiate an object of type and will populate it from the tomcat-users.xml file using the factory class .MemoryUserDatabaseFactory.įinally, here we see how to add a user with the admin role required by the example of the article. This configuration uses a global JNDI resource to define the source of the user's database: The cookies store the token that associates the requests with the user credentials. Run the default Tomcat server ( CMD catalina.
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