[GitHub] [nifi] kulikg commented on a diff in pull request #6715: NIFI-10871 Skip CSRF processing for replicated HTTP requests

[GitBox <gi...@apache.org>]

kulikg commented on code in PR #6715:
URL: https://github.com/apache/nifi/pull/6715#discussion_r1031528245


##########
nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-security/src/main/java/org/apache/nifi/web/security/csrf/SkipReplicatedCsrfFilter.java:
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@@ -0,0 +1,56 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.nifi.web.security.csrf;
+
+import org.springframework.security.web.csrf.CsrfFilter;
+import org.springframework.security.web.util.matcher.RequestHeaderRequestMatcher;
+import org.springframework.security.web.util.matcher.RequestMatcher;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+/**
+ * Skip Replicated Cross-Site Request Forgery Filter disables subsequent filtering for matched requests
+ */
+public class SkipReplicatedCsrfFilter extends OncePerRequestFilter {
+    /** RequestReplicator.REQUEST_TRANSACTION_ID_HEADER applied to replicated cluster requests */
+    protected static final String REPLICATED_REQUEST_HEADER = "X-RequestTransactionId";
+
+    /** Requests containing replicated header will be skipped */
+    private static final RequestMatcher REQUEST_MATCHER = new RequestHeaderRequestMatcher(REPLICATED_REQUEST_HEADER);
+
+    /**
+     * Set request attribute to disable standard CSRF Filter when request matches
+     *
+     * @param request HTTP Servlet Request
+     * @param response HTTP Servlet Response
+     * @param filterChain Filter Chain
+     * @throws ServletException Thrown on FilterChain.doFilter()
+     * @throws IOException Thrown on FilterChain.doFilter()
+     */
+    @Override
+    protected void doFilterInternal(final HttpServletRequest request, final HttpServletResponse response, final FilterChain filterChain) throws ServletException, IOException {
+        if (REQUEST_MATCHER.matches(request)) {
+            CsrfFilter.skipRequest(request);

Review Comment:
   I would suggest you to mark forged requests in logs using MDC. So that any activity in a NiFi instance resulted by a forged request could have a mark like [forged] in the log entry. This could improve clarity.



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