Add ForwardAuthenticationSuccessHandler

Fixes gh-3726

web/src/main/java/org/springframework/security/web/authentication/ForwardAuthenticationSuccessHandler.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2002-2016 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
+ *
+ *      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.springframework.security.web.authentication;
+
+import org.springframework.security.core.Authentication;
+import org.springframework.security.web.util.UrlUtils;
+import org.springframework.util.Assert;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+/**
+ * <p>
+ * Forward Authentication Success Handler
+ * </p>
+ *
+ * @author Shazin Sadakath
+ *
+ */
+public class ForwardAuthenticationSuccessHandler implements AuthenticationSuccessHandler {
+
+	private final String forwardUrl;
+
+	/**
+	 * @param forwardUrl
+	 */
+	public ForwardAuthenticationSuccessHandler(String forwardUrl) {
+        Assert.isTrue(UrlUtils.isValidRedirectUrl(forwardUrl), "'"
+                + forwardUrl + "' is not a valid forward URL");
+        this.forwardUrl = forwardUrl;
+	}
+
+	@Override
+	public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
+		request.getRequestDispatcher(forwardUrl).forward(request, response);
+    }
+}

web/src/test/java/org/springframework/security/web/authentication/ForwardAuthenticaionSuccessHandlerTests.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2002-2016 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
+ *
+ *      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.springframework.security.web.authentication;
+
+import org.junit.Test;
+import org.springframework.mock.web.MockHttpServletRequest;
+import org.springframework.mock.web.MockHttpServletResponse;
+import org.springframework.security.core.Authentication;
+
+import static org.mockito.Mockito.mock;
+import static org.assertj.core.api.Assertions.*;
+
+/**
+ * <p>
+ * Forward Authentication Failure Handler Tests
+ * </p>
+ *
+ * @author Shazin Sadakath
+ *
+ */
+public class ForwardAuthenticaionSuccessHandlerTests {
+
+	@Test(expected = IllegalArgumentException.class)
+	public void invalidForwardUrl() {
+		new ForwardAuthenticationSuccessHandler("aaa");
+	}
+
+	@Test(expected = IllegalArgumentException.class)
+	public void emptyForwardUrl() {
+		new ForwardAuthenticationSuccessHandler("");
+	}
+
+	@Test
+	public void responseIsForwarded() throws Exception {
+		ForwardAuthenticationSuccessHandler fash = new ForwardAuthenticationSuccessHandler("/forwardUrl");
+
+		MockHttpServletRequest request = new MockHttpServletRequest();
+		MockHttpServletResponse response = new MockHttpServletResponse();
+		Authentication authentication = mock(Authentication.class);
+
+		fash.onAuthenticationSuccess(request, response, authentication);
+
+		assertThat(response.getForwardedUrl()).isEqualTo("/forwardUrl");
+	}
+}