Add Sanitization Filter for Request Params, Request Body, and Headers

[kreloaded]

In an effort to enhance the security of our Spring Boot application, there's a need to add a Sanitization Filter that would sanitize all incoming request parameters, request bodies, and headers to prevent security vulnerabilities such as SQL Injection, Cross-Site Scripting (XSS), etc.

Details

• Sanitize Request Parameters: All incoming request parameters should be sanitized to strip or escape dangerous characters or strings that could be used for SQL Injection, XSS attacks, etc.
• Sanitize Request Body: For POST, PUT, and PATCH requests, the request body often contains user-inputted data that should also be sanitized.
• Sanitize Headers: HTTP headers like User-Agent, Referer, etc., can also contain malicious strings and should be sanitized.

Expected Behavior
Once the Sanitization Filter is implemented, any incoming request should automatically be sanitized before hitting the application controllers.

Technical Requirements

• The filter should be part of a new or existing Spring Boot starter project.
• Must use existing Spring Boot's Filter interface.
• Should work seamlessly with existing security configurations.
• Must include unit tests to verify the functionality.

Acceptance Criteria

• Successfully sanitize all incoming request parameters.
• Successfully sanitize request bodies for POST, PUT, and PATCH requests.
• Successfully sanitize all incoming HTTP headers.
• No noticeable performance degradation.
• Unit tests confirming the sanitization.

Optional

Documentation on how to use and configure the Sanitization Filter.