Table of Contents
- 1 What are different ways for Servlet Authentication?
- 2 How do you program a Servlet?
- 3 Which authentication options are available in servlets select all that apply?
- 4 What is generic Servlet and HTTP Servlet?
- 5 What is an authentication filter?
- 6 What is Dao in servlet?
- 7 Where do I Find my servlet class name?
- 8 How to change license header for servlet in Java?
What are different ways for Servlet Authentication?
What are different ways for authentication of servlet?
- HTTP Digest Authentication.
- HTTP Basic Authentication.
- HTTPS Authentication.
- Form-based Authentication.
How do you program a Servlet?
These steps are as follows:
- Create a directory structure under Tomcat for your application.
- Write the servlet source code. You need to import the javax. servlet package and the javax. servlet.
- Compile your source code.
- Create a deployment descriptor.
- Run Tomcat.
- Call your servlet from a web browser.
What is Servlet Authentication?
With basic authentication of a servlet, the web browser presents a standard login dialog that is not customizable. When a user submits their name and password, the server determines if the user name and password are those of an authorized user and sends the requested web resource if the user is authorized to view it.
How does servlet provide security?
The authentication mechanism in the servlet specification uses a technique called role-based security. The idea is that rather than restricting resources at the user level, you create roles and restrict the resources by role. This file defines a simple mapping between username, password, and role.
Which authentication options are available in servlets select all that apply?
A servlet-based web application can choose from the following types of authentication, from least secure to most:
- Basic authentication.
- Form-based authentication.
- Digest authentication.
- SSL and client certificate authentication.
What is generic Servlet and HTTP Servlet?
The main difference between GenericServlet and HttpServlet is that the GenericServlet is protocol independent that can be used with any protocol such as HTTP, SMTP, FTP, CGI etc. while HttpServlet is protocol dependent and is only used with HTTP protocol.
What is the difference between JSP and servlets?
Servlet is a java code. JSP is slower than Servlet because the first step in JSP lifecycle is the translation of JSP to java code and then compile. Servlet can accept all protocol requests.
What is generic servlet in Java?
Defines a generic, protocol-independent servlet. GenericServlet makes writing servlets easier. It provides simple versions of the lifecycle methods init and destroy and of the methods in the ServletConfig interface. GenericServlet also implements the log method, declared in the ServletContext interface.
What is an authentication filter?
An authentication filter is a component that authenticates an HTTP request. Authentication filters let you set an authentication scheme for individual controllers or actions. That way, your app can support different authentication mechanisms for different HTTP resources.
What is Dao in servlet?
The login servlet instantiates a Bean that is of type “UserBean”, and then calls the DAO named “UserDAO”. The DAO, as said before, contains methods needed to communicate with the data source.
What is RequestDispatcher in servlet?
Defines an object that receives requests from the client and sends them to any resource (such as a servlet, HTML file, or JSP file) on the server. The servlet container creates the RequestDispatcher object, which is used as a wrapper around a server resource located at a particular path or given by a particular name.
How to create a servlet example in javatpoint?
The steps are as follows: 1 Create a directory structure 2 Create a Servlet 3 Compile the Servlet 4 Create a deployment descriptor 5 Start the server and deploy the project 6 Access the servlet
Where do I Find my servlet class name?
If you have a fully qualified class name of com.myorg.MyServlet, then this servlet class must be located in WEB-INF/classes/com/myorg/MyServlet.class.
How to change license header for servlet in Java?
To change this license header, choose License Headers in Project Properties. and open the template in the editor. Create a new servlet file named “Filter.java” and write the following code for it. i mport javax.servlet.*;
Where to create a servlet in Sun Microsystem?
The Sun Microsystem defines a unique standard to be followed by all the server vendors. Let’s see the directory structure that must be followed to create the servlet. As you can see that the servlet class file must be in the classes folder. The web.xml file must be under the WEB-INF folder.