Table of Contents
What is servlet authentication?
Servlet authentication looks simple: A user tries to access a protected resource, such as a JSP page. If the user has been authenticated, the servlet container makes the resource available; otherwise, the user is asked for a username and password.
Which authentication options are available in servlets?
– There are four ways of Authentication options available in servlets.
- HTTP basic authentication: – In this, server uses the username and password provided by the client and these credentials are transmitted using simple base64 encoding.
- HTTP digest authentication:
- HTTPS client authentication:
- Form-based authentication:
How do you authenticate in Java?
To develop an Authentication Service client in Java, consider the following high level steps:
- Use Java Authentication and Authorization Service (JAAS) interfaces to enable the authentication process.
- Provide configuration information by using a properties file, -D option, or a configuration file.
- Implement logging.
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.
What is form based authentication in Java?
Form-based authentication allows the developer to control the look and feel of the login authentication screens by customizing the login screen and error pages that an HTTP browser presents to the end user.
When can a servlet be loaded?
The loading of the servlet depends on the attribute “load-on-startup” in “web. xml” file. If the attribute has a positive integer(0 to 128) then the servlet is load with the loading of the container otherwise it loads when the first request comes for service.
Which of the following methods are related to cookies?
Useful Methods of Cookie class
| Method | Description |
|---|---|
| public String getValue() | Returns the value of the cookie. |
| public void setName(String name) | changes the name of the cookie. |
| public void setValue(String value) | changes the value of the cookie. |
What is OAuth authentication in Java?
OAuth2. 0 is an open authorization protocol, which allows accessing the resources of the resource owner by enabling the client applications on HTTP services such as Facebook, GitHub, etc. It allows sharing of resources stored on one site to another site without using their credentials.
What approach is used for the authentication mechanism in the servlet specifications?
Role Based Authentication technique used for authentication mechanism in servlet specification – JSP.
What is J security check?
As described in Form-Based Authentication, Java EE security defines the j_security_check action for login forms. This allows the web container to authenticate users from many different web application resources.
What is servlet lifecycle?
Advertisements. A servlet life cycle can be defined as the entire process from its creation till the destruction. The following are the paths followed by a servlet. The servlet is initialized by calling the init() method. The servlet calls service() method to process a client’s request.
What is the maximum size of cookie?
4096 bytes
What is the maximum size of a web browser’s cookies value?
| Web Browser | Maximum cookies | Maximum size per cookie |
|---|---|---|
| Google Chrome | 180 | 4096 bytes |
| Firefox | 150 | 4097 bytes |
| Opera | 180 | 4096 bytes |
| Android | 50 | 4096 bytes |
How do you authenticate a servlet?
Servlet authentication looks simple: A user tries to access a protected resource, such as a JSP page. If the user has been authenticated, the servlet container makes the resource available; otherwise, the user is asked for a username and password.
Which IDE is used for user authentication using Servlet in Java?
The NetBeans IDE is used for the sample application. This article explains user authentication using a servlet in Java. The NetBeans IDE is used for the sample application.
What is Okta Java Authentication SDK?
The Okta service stores your user accounts for you and the Okta Java Authentication SDK wraps the Okta Authentication APIs and makes it simple to authenticate users via username/password. Handling user authentication this way is quite a bit simpler than implementing everything needed to support user authentication on your own.
What is declarative authentication in servlet?
This means that the authentication type and transport scheme can only be set by servlet containers. Declarative authentication requires no programming because authentication is declared with XML tags in a deployment descriptor and implemented by the servlet container.