martin-g commented on a change in pull request #439: URL: https://github.com/apache/wicket/pull/439#discussion_r451530419
########## File path: wicket-core/src/main/java/org/apache/wicket/protocol/http/CsrfPreventionRequestCycleListener.java ########## @@ -372,6 +394,23 @@ public void onRequestHandlerResolved(RequestCycle cycle, IRequestHandler handler } } + @Override + public void onEndRequest(RequestCycle cycle) + { + // set vary headers to avoid caching responses processed by Fetch Metadata + // caching these responses may return 403 responses to legitimate requests + // or defeat the protection + if (cycle.getResponse() instanceof WebResponse) + { + WebResponse webResponse = (WebResponse)cycle.getResponse(); + if (webResponse.isHeaderSupported()) + { + webResponse.addHeader(VARY_HEADER, SEC_FETCH_DEST_HEADER + ", " Review comment: The value could be yet another constant field. There is no need to concatenate it for each and every request. ########## File path: wicket-core/src/main/java/org/apache/wicket/protocol/http/CsrfPreventionRequestCycleListener.java ########## @@ -33,6 +33,9 @@ import org.apache.wicket.request.cycle.IRequestCycleListener; import org.apache.wicket.request.cycle.RequestCycle; import org.apache.wicket.request.http.WebRequest; +import static org.apache.wicket.protocol.http.ResourceIsolationPolicy.*; Review comment: nit: this static import should be at the top and should not use `*` ########## File path: wicket-core/src/main/java/org/apache/wicket/protocol/http/CsrfPreventionRequestCycleListener.java ########## @@ -178,6 +181,8 @@ public String toString() */ private Collection<String> acceptedOrigins = new ArrayList<>(); + private final ResourceIsolationPolicy fetchMetadataPolicy = new DefaultResourceIsolationPolicy(); Review comment: I think this policy should be replaceable/configurable here, i.e. should be passed as constructor parameter. The default constructor should use `DefaultResourceIsolationPolicy` ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org