ForceEagerSessionCreationFilter

Closes gh-11109

web/src/main/java/org/springframework/security/web/session/ForceEagerSessionCreationFilter.java

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2002-2022 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.security.web.session;
+
+import java.io.IOException;
+
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import jakarta.servlet.http.HttpSession;
+
+import org.springframework.core.log.LogMessage;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+/**
+ * Eagerly creates {@link HttpSession} if it does not already exist.
+ *
+ * @author Rob Winch
+ * @since 5.7
+ */
+public class ForceEagerSessionCreationFilter extends OncePerRequestFilter {
+
+	@Override
+	protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)
+			throws ServletException, IOException {
+		HttpSession session = request.getSession();
+		if (this.logger.isDebugEnabled() && session.isNew()) {
+			this.logger.debug(LogMessage.format("Created session eagerly"));
+		}
+		filterChain.doFilter(request, response);
+	}
+
+}

web/src/test/java/org/springframework/security/web/session/ForceEagerSessionCreationFilterTests.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright 2002-2022 the original author or authors.
+ *
+ * Licensed 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
+ *
+ *      https://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.springframework.security.web.session;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.mock.web.MockFilterChain;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.mock.web.MockHttpServletResponse;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ForceEagerSessionCreationFilterTests {
+
+	@Test
+	void createsSession() throws Exception {
+		ForceEagerSessionCreationFilter filter = new ForceEagerSessionCreationFilter();
+		MockHttpServletRequest request = new MockHttpServletRequest();
+		MockFilterChain chain = new MockFilterChain();
+
+		filter.doFilter(request, new MockHttpServletResponse(), chain);
+
+		assertThat(request.getSession(false)).isNotNull();
+		assertThat(chain.getRequest()).isEqualTo(request);
+	}
+
+}