Add method security web sample

Useful sample for common use case where user adds custom Authentication,
a form login, *and* global method security all the the same application.

spring-boot-samples/spring-boot-sample-web-method-security/src/test/java/sample/ui/method/SampleMethodSecurityApplicationTests.java

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+/*
+ * Copyright 2012-2014 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 sample.ui.method;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.springframework.boot.SpringApplication;
+import org.springframework.context.ConfigurableApplicationContext;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.http.client.ClientHttpResponse;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+import org.springframework.web.client.DefaultResponseErrorHandler;
+import org.springframework.web.client.RestTemplate;
+
+/**
+ * Basic integration tests for demo application.
+ * 
+ * @author Dave Syer
+ */
+public class SampleMethodSecurityApplicationTests {
+
+	private static ConfigurableApplicationContext context;
+
+	@BeforeClass
+	public static void start() throws Exception {
+		Future<ConfigurableApplicationContext> future = Executors
+				.newSingleThreadExecutor().submit(
+						new Callable<ConfigurableApplicationContext>() {
+							@Override
+							public ConfigurableApplicationContext call() throws Exception {
+								return SpringApplication
+										.run(SampleMethodSecurityApplication.class);
+							}
+						});
+		context = future.get(60, TimeUnit.SECONDS);
+	}
+
+	@AfterClass
+	public static void stop() {
+		if (context != null) {
+			context.close();
+		}
+	}
+
+	@Test
+	public void testHome() throws Exception {
+		HttpHeaders headers = new HttpHeaders();
+		headers.setAccept(Arrays.asList(MediaType.TEXT_HTML));
+		ResponseEntity<String> entity = getRestTemplate().exchange(
+				"http://localhost:8080", HttpMethod.GET, new HttpEntity<Void>(headers),
+				String.class);
+		assertEquals(HttpStatus.OK, entity.getStatusCode());
+		assertTrue("Wrong body (title doesn't match):\n" + entity.getBody(), entity
+				.getBody().contains("<title>Login"));
+	}
+
+	@Test
+	public void testLogin() throws Exception {
+		HttpHeaders headers = new HttpHeaders();
+		headers.setAccept(Arrays.asList(MediaType.TEXT_HTML));
+		MultiValueMap<String, String> form = new LinkedMultiValueMap<String, String>();
+		form.set("username", "admin");
+		form.set("password", "admin");
+		getCsrf(form, headers);
+		ResponseEntity<String> entity = getRestTemplate().exchange(
+				"http://localhost:8080/login", HttpMethod.POST,
+				new HttpEntity<MultiValueMap<String, String>>(form, headers),
+				String.class);
+		assertEquals(HttpStatus.FOUND, entity.getStatusCode());
+		assertEquals("http://localhost:8080/", entity.getHeaders().getLocation()
+				.toString());
+	}
+
+	@Test
+	public void testDenied() throws Exception {
+		HttpHeaders headers = new HttpHeaders();
+		headers.setAccept(Arrays.asList(MediaType.TEXT_HTML));
+		MultiValueMap<String, String> form = new LinkedMultiValueMap<String, String>();
+		form.set("username", "user");
+		form.set("password", "user");
+		getCsrf(form, headers);
+		ResponseEntity<String> entity = getRestTemplate().exchange(
+				"http://localhost:8080/login", HttpMethod.POST,
+				new HttpEntity<MultiValueMap<String, String>>(form, headers),
+				String.class);
+		assertEquals(HttpStatus.FOUND, entity.getStatusCode());
+		String cookie = entity.getHeaders().getFirst("Set-Cookie");
+		headers.set("Cookie", cookie);
+		ResponseEntity<String> page = getRestTemplate().exchange(
+				entity.getHeaders().getLocation(), HttpMethod.GET,
+				new HttpEntity<Void>(headers), String.class);
+		assertEquals(HttpStatus.FORBIDDEN, page.getStatusCode());
+		assertTrue("Wrong body (message doesn't match):\n" + entity.getBody(), page
+				.getBody().contains("Access denied"));
+	}
+
+	private void getCsrf(MultiValueMap<String, String> form, HttpHeaders headers) {
+		ResponseEntity<String> page = getRestTemplate().getForEntity(
+				"http://localhost:8080/login", String.class);
+		String cookie = page.getHeaders().getFirst("Set-Cookie");
+		headers.set("Cookie", cookie);
+		String body = page.getBody();
+		Matcher matcher = Pattern.compile("(?s).*name=\"_csrf\".*?value=\"([^\"]+).*")
+				.matcher(body);
+		matcher.find();
+		form.set("_csrf", matcher.group(1));
+	}
+
+	private RestTemplate getRestTemplate() {
+		RestTemplate restTemplate = new RestTemplate();
+		restTemplate.setErrorHandler(new DefaultResponseErrorHandler() {
+			@Override
+			public void handleError(ClientHttpResponse response) throws IOException {
+			}
+		});
+		return restTemplate;
+
+	}
+
+}