Package org.codelibs.fess.filter

Class RateLimitFilter

java.lang.Object

org.codelibs.fess.filter.RateLimitFilter

All Implemented Interfaces:

jakarta.servlet.Filter

public class RateLimitFilter
extends Object
implements jakarta.servlet.Filter

Filter for rate limiting to protect against bot attacks and excessive requests. Tracks request counts per IP address and blocks excessive requests based on configurable thresholds.

Constructor Summary

Constructors

Constructor	Description
RateLimitFilter()	Creates a new instance of RateLimitFilter.

Method Summary

Modifier and Type	Method	Description
void	doFilter(jakarta.servlet.ServletRequest request, jakarta.servlet.ServletResponse response, jakarta.servlet.FilterChain chain)
protected void	sendBlockedResponse(jakarta.servlet.http.HttpServletResponse response)	Send a 403 Forbidden response for blocked IPs.
protected void	sendRateLimitResponse(jakarta.servlet.http.HttpServletResponse response, int retryAfterSeconds)	Send a 429 Too Many Requests response.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface jakarta.servlet.Filter

destroy, init

Constructor Details

RateLimitFilter

public RateLimitFilter()

Creates a new instance of RateLimitFilter.

Method Details

doFilter

public void doFilter(jakarta.servlet.ServletRequest request,
 jakarta.servlet.ServletResponse response,
 jakarta.servlet.FilterChain chain)
              throws IOException,
jakarta.servlet.ServletException

Specified by:

doFilter in interface jakarta.servlet.Filter

Throws:

IOException

jakarta.servlet.ServletException

sendBlockedResponse

protected void sendBlockedResponse(jakarta.servlet.http.HttpServletResponse response)
                            throws IOException

Send a 403 Forbidden response for blocked IPs.

Parameters:

response - the HTTP response

Throws:

IOException - if an I/O error occurs

sendRateLimitResponse

protected void sendRateLimitResponse(jakarta.servlet.http.HttpServletResponse response,
 int retryAfterSeconds)
                              throws IOException

Send a 429 Too Many Requests response.

Parameters:

response - the HTTP response

retryAfterSeconds - the Retry-After header value

Throws:

IOException - if an I/O error occurs