CsrfPreventionFilterBase (Apache Tomcat 10.1.55 API Documentation)
Description: declaration: package: org.apache.catalina.filters, class: CsrfPreventionFilterBase

# Class CsrfPreventionFilterBase

java.lang.Object
org.apache.catalina.filters.FilterBase
org.apache.catalina.filters.CsrfPreventionFilterBase

All Implemented Interfaces:
  `Filter`

Direct Known Subclasses:
  `CsrfPreventionFilter, RestCsrfPreventionFilter`

public abstract class CsrfPreventionFilterBase extends FilterBase

- ## Field Summary

  ### Fields inherited from class FilterBase

  `sm`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `CsrfPreventionFilterBase()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `protected String`
  `generateNonce(HttpServletRequest request)`
  Generate a once time token (nonce) for authenticating subsequent requests.
  `int`
  `getDenyStatus()`
  `protected Log`
  `getLogger()`
  `protected String`
  `getRequestedPath(HttpServletRequest request)`
  `void`
  `init(FilterConfig filterConfig)`
  Iterates over the configuration parameters and either logs a warning, or throws an exception for any parameter that does not have a matching setter in this filter.
  `protected boolean`
  `isConfigProblemFatal()`
  Determines if an exception when calling a setter or an unknown configuration attribute triggers the failure of this filter which in turn will prevent the web application from starting.
  `void`
  `setDenyStatus(int denyStatus)`
  Set response status code that is used to reject denied request.
  `void`
  `setRandomClass(String randomClass)`
  Specify the class to use to generate the nonces.

  ### Methods inherited from class Object

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

  ### Methods inherited from interface Filter

  `destroy, doFilter`

- ## Constructor Details

  - ### CsrfPreventionFilterBase

    public CsrfPreventionFilterBase()

- ## Method Details

  - ### getLogger

    protected Log getLogger()
    Specified by:
      `getLogger` in class `FilterBase`

  - ### getDenyStatus

    public int getDenyStatus()
    Returns:
      response status code that is used to reject denied request.

  - ### setDenyStatus

    public void setDenyStatus(int denyStatus)
    Set response status code that is used to reject denied request. If none set, the default value of 403 will be used.
    Parameters:
      `denyStatus` - HTTP status code

  - ### setRandomClass

    public void setRandomClass(String randomClass)
    Specify the class to use to generate the nonces. Must be in instance of `Random`.
    Parameters:
      `randomClass` - The name of the class to use

  - ### init

    public void init(FilterConfig filterConfig) throws ServletException
    Description copied from class: `FilterBase`
    Iterates over the configuration parameters and either logs a warning, or throws an exception for any parameter that does not have a matching setter in this filter.
    Specified by:
      `init` in interface `Filter`
    Overrides:
      `init` in class `FilterBase`
    Parameters:
      `filterConfig` - The configuration information associated with the filter instance being initialised
    Throws:
      `ServletException` - if `FilterBase.isConfigProblemFatal()` returns `true` and a configured parameter does not have a matching setter

  - ### isConfigProblemFatal

    protected boolean isConfigProblemFatal()
    Description copied from class: `FilterBase`
    Determines if an exception when calling a setter or an unknown configuration attribute triggers the failure of this filter which in turn will prevent the web application from starting.
    Overrides:
      `isConfigProblemFatal` in class `FilterBase`
    Returns:
      `true` if a problem should trigger the failure of this filter, else `false`

  - ### generateNonce

    protected String generateNonce(HttpServletRequest request)
    Generate a once time token (nonce) for authenticating subsequent requests. The nonce generation is a simplified version of ManagerBase.generateSessionId().
    Parameters:
      `request` - The request. Unused in this method but present for the benefit of subclasses.
    Returns:
      the generated nonce

  - ### getRequestedPath

    protected String getRequestedPath(HttpServletRequest request)