Obtaining a cookie from a browser that has been dropped by a different application

Is there a way to check if a user is logged in by hitting an application URL programmatically using Java or JSP? It generates a cookie named xyz for logged-in users in the browser.

For some reason, every time I call the URL from my Java code, it doesn't find the cookie (xyz) because a new session is created with each request. How can I ensure that my application creates the cookie in the browser so that my code can properly detect it?

Answer №1

When a user's browser calls the URL on the server side, the cookie is stored locally on the client side, meaning it will not be sent back with the response.

Answer №2

Your current method of determining whether a user is logged in or not may not be effective with the approach you are using.

A potential solution for this issue is to implement the HttpSessionAttributeListener and customize the attributeAdded and attributeRemoved methods. By doing so, you can track when a session is created for a logged-in user and save their username as an attribute in the session. When the username attribute is saved, the attributeAdded method in your listener will be triggered, allowing you to see the user's name. Similarly, when a user logs out and the session is invalidated, the attributeRemoved method will be called, providing you with notification of the user who logged out.

For a more comprehensive explanation, refer to the example provided below:

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