public class RestCsrfPreventionFilter extends CsrfPreventionFilterBase
 Positive scenario:
           Client                            Server
              |                                 |
              | GET Fetch Request              \| JSESSIONID
              |---------------------------------| X-CSRF-Token
              |                                /| pair generation
              |/Response to Fetch Request       |
              |---------------------------------|
 JSESSIONID   |\                                |
 X-CSRF-Token |                                 |
 pair cached  | POST Request with valid nonce  \| JSESSIONID
              |---------------------------------| X-CSRF-Token
              |                                /| pair validation
              |/ Response to POST Request       |
              |---------------------------------|
              |\                                |
 Negative scenario:
           Client                            Server
              |                                 |
              | POST Request without nonce     \| JSESSIONID
              |---------------------------------| X-CSRF-Token
              |                                /| pair validation
              |/Request is rejected             |
              |---------------------------------|
              |\                                |
           Client                            Server
              |                                 |
              | POST Request with invalid nonce\| JSESSIONID
              |---------------------------------| X-CSRF-Token
              |                                /| pair validation
              |/Request is rejected             |
              |---------------------------------|
              |\                                |
 sm| Constructor and Description | 
|---|
| RestCsrfPreventionFilter() | 
| Modifier and Type | Method and Description | 
|---|---|
| void | doFilter(ServletRequest request,
        ServletResponse response,
        FilterChain chain)The  doFiltermethod of the Filter is called by the container
 each time a request/response pair is passed through the chain due to a
 client request for a resource at the end of the chain. | 
| Set<String> | getPathsAcceptingParams() | 
| void | setPathsAcceptingParams(String pathsList)A comma separated list of URLs that can accept nonces via request
 parameter 'X-CSRF-Token'. | 
generateNonce, getDenyStatus, getLogger, getRequestedPath, init, isConfigProblemFatal, setDenyStatus, setRandomClassdestroypublic void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
FilterdoFilter method of the Filter is called by the container
 each time a request/response pair is passed through the chain due to a
 client request for a resource at the end of the chain. The FilterChain
 passed in to this method allows the Filter to pass on the request and
 response to the next entity in the chain.
 
 A typical implementation of this method would follow the following
 pattern:- 
 1. Examine the request
 2. Optionally wrap the request object with a custom implementation to
 filter content or headers for input filtering 
 3. Optionally wrap the response object with a custom implementation to
 filter content or headers for output filtering 
 4. a) Either invoke the next entity in the chain using
 the FilterChain object (chain.doFilter()), 
 4. b) or not pass on the request/response pair to the
 next entity in the filter chain to block the request processing
 5. Directly set headers on the response after invocation of the next
 entity in the filter chain.
request - The request to processresponse - The response associated with the requestchain - Provides access to the next filter in the chain for this
                 filter to pass the request and response to for further
                 processingIOException - if an I/O error occurs during this filter's
                     processing of the requestServletException - if the processing fails for any other reasonpublic void setPathsAcceptingParams(String pathsList)
pathsList - Comma separated list of URLs to be configured as paths
            accepting request parameters with nonce information.Copyright © 2000-2020 Apache Software Foundation. All Rights Reserved.