public class CsrfPreventionFilter extends CsrfPreventionFilterBase
HttpServletResponse.encodeRedirectURL(String) and
HttpServletResponse.encodeURL(String) are used to encode all URLs
returned to the client
| Modifier and Type | Class and Description |
|---|---|
protected static class |
CsrfPreventionFilter.CsrfResponseWrapper |
protected static class |
CsrfPreventionFilter.LruCache<T> |
sm| Constructor and Description |
|---|
CsrfPreventionFilter() |
| Modifier and Type | Method and Description |
|---|---|
void |
doFilter(ServletRequest request,
ServletResponse response,
FilterChain chain)
The
doFilter 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. |
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.
|
void |
setEntryPoints(String entryPoints)
Entry points are URLs that will not be tested for the presence of a valid
nonce.
|
void |
setNonceCacheSize(int nonceCacheSize)
Sets the number of previously issued nonces that will be cached on a LRU
basis to support parallel requests, limited use of the refresh and back
in the browser and similar behaviors that may result in the submission
of a previous nonce rather than the current one.
|
void |
setNonceRequestParameterName(String parameterName)
Sets the request parameter name to use for CSRF nonces.
|
generateNonce, getDenyStatus, getLogger, getRequestedPath, isConfigProblemFatal, setDenyStatus, setRandomClassdestroypublic void setEntryPoints(String entryPoints)
entryPoints - Comma separated list of URLs to be configured as
entry points.public void setNonceCacheSize(int nonceCacheSize)
nonceCacheSize - The number of nonces to cachepublic void setNonceRequestParameterName(String parameterName)
parameterName - The request parameter name to use
for CSRF nonces.public void init(FilterConfig filterConfig) throws ServletException
FilterBaseinit in interface Filterinit in class CsrfPreventionFilterBasefilterConfig - The configuration information associated with the
filter instance being initialisedServletException - if FilterBase.isConfigProblemFatal() returns
true and a configured parameter does not
have a matching setterpublic void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException
javax.servlet.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 reasonCopyright © 2000-2020 Apache Software Foundation. All Rights Reserved.