Which of the following methods does the Java Servlet Specification v2.4 define in the HttpServletRequest interface that control programmatic security? Each correct answer represents a complete solution.
Choose all that apply.
Click on the arrows to vote for the correct answer
A. B. C. D.the remote user name.
The value of the getUserPrincipal() method returns null if no user is authenticated.
Answer: A is incorrect.
It is not defined in the.
The various methods of the HttpServletRequest interface are as follows: getRemoteUser(): It returns the user name that is used for the client authentication.
The value of the getRemoteUser() method returns null if no user is authenticated.
isUserInRole(): It determines whether the remote user is granted a specified user role.
The value of the isUserInRole() method returns true if the remote user is granted the specified user role; otherwise it returns false.
getUserPrincipal(): It determines the principle name of the current user and returns the java.security.Principal object.
The java.security.Principal object contains HttpServletRequest interface.
The getCallerIdentity() method is used to obtain the java.security.Identity of the caller.
The Java Servlet Specification defines the standard API for interacting with web-based applications in the Java programming language. Among other things, it provides interfaces for handling HTTP requests and responses. The HttpServletRequest interface is used to represent an HTTP request and provides methods for controlling programmatic security.
The methods defined in the HttpServletRequest interface that control programmatic security are as follows:
A. getCallerIdentity(): This method is not defined in the HttpServletRequest interface. It is a method of the EJBContext interface, which provides access to security information for Enterprise JavaBeans (EJBs).
B. isUserInRole(): This method returns a boolean value indicating whether the user making the request is in the specified role. For example, if a web application has a role called "admin", the isUserInRole("admin") method can be used to determine whether the user making the request is an administrator.
C. getUserPrincipal(): This method returns a java.security.Principal object representing the user making the request. The Principal object contains information about the user's identity, such as their name and authentication status.
D. getRemoteUser(): This method returns the name of the user making the request, as obtained from the authentication mechanism used by the web server. If the user has not been authenticated, this method returns null.
Therefore, the correct answers are B, C, and D.