Let MVC handle content negotiation for endpoints

In particular the ResourceEndpoint is likely to serve data that is
not JSON, so having a "produces" attribute at the type level is a bad
idea.

Fixes gh-337

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/encryption/EncryptionController.java

@@ -45,7 +45,7 @@ import org.springframework.web.bind.annotation.RestController;
  *
  */
 @RestController
-@RequestMapping(path = "${spring.cloud.config.server.prefix:}", produces = MediaType.APPLICATION_JSON_VALUE)
+@RequestMapping(path = "${spring.cloud.config.server.prefix:}")
 public class EncryptionController {
 
 	private static Log logger = LogFactory.getLog(EncryptionController.class);
@@ -111,7 +111,7 @@ public class EncryptionController {
 	@RequestMapping(value = "encrypt/status", method = RequestMethod.GET)
 	public Map<String, Object> status() {
 		checkEncryptorInstalled("application", "default");
-		return Collections.<String, Object> singletonMap("status", "OK");
+		return Collections.<String, Object>singletonMap("status", "OK");
 	}
 
 	@RequestMapping(value = "encrypt", method = RequestMethod.POST)

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/environment/EnvironmentController.java

@@ -57,7 +57,7 @@ import org.yaml.snakeyaml.nodes.Tag;
  *
  */
 @RestController
-@RequestMapping(method = RequestMethod.GET, path = "${spring.cloud.config.server.prefix:}", produces = MediaType.APPLICATION_JSON_VALUE)
+@RequestMapping(method = RequestMethod.GET, path = "${spring.cloud.config.server.prefix:}")
 public class EnvironmentController {
 
 	private static final String MAP_PREFIX = "map";

spring-cloud-config-server/src/main/java/org/springframework/cloud/config/server/resource/ResourceController.java

@@ -48,7 +48,7 @@ import org.springframework.web.bind.annotation.RestController;
  *
  */
 @RestController
-@RequestMapping(method = RequestMethod.GET, path = "${spring.cloud.config.server.prefix:}", produces = MediaType.APPLICATION_JSON_VALUE)
+@RequestMapping(method = RequestMethod.GET, path = "${spring.cloud.config.server.prefix:}")
 public class ResourceController {
 
 	private ResourceRepository resourceRepository;

spring-cloud-config-server/src/test/java/org/springframework/cloud/config/server/resource/ResourceControllerIntegrationTests.java

@@ -0,0 +1,100 @@
+/*
+ * Copyright 2013-2015 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.cloud.config.server.resource;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mockito;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.PropertyPlaceholderAutoConfiguration;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.cloud.config.environment.Environment;
+import org.springframework.cloud.config.server.environment.EnvironmentRepository;
+import org.springframework.cloud.config.server.resource.ResourceControllerIntegrationTests.ControllerConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Import;
+import org.springframework.core.io.ByteArrayResource;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import org.springframework.test.context.web.WebAppConfiguration;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
+import org.springframework.test.web.servlet.result.MockMvcResultMatchers;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+import org.springframework.web.servlet.config.annotation.EnableWebMvc;
+
+/**
+ * @author Dave Syer
+ *
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = ControllerConfiguration.class)
+@WebAppConfiguration
+public class ResourceControllerIntegrationTests {
+
+	@Autowired
+	private WebApplicationContext context;
+	private MockMvc mvc;
+	@Autowired
+	private EnvironmentRepository repository;
+	@Autowired
+	private ResourceRepository resources;
+
+	@Before
+	public void init() {
+		Mockito.reset(this.repository);
+		this.mvc = MockMvcBuilders.webAppContextSetup(this.context).build();
+	}
+
+	@Test
+	public void environmentNoLabel() throws Exception {
+		Mockito.when(this.repository.findOne("foo", "default", "master"))
+				.thenReturn(new Environment("foo", "default"));
+		Mockito.when(this.resources.findOne("foo", "default", "master", "foo.txt"))
+				.thenReturn(new ByteArrayResource("hello".getBytes()));
+		this.mvc.perform(MockMvcRequestBuilders.get("/foo/default/master/foo.txt"))
+				.andExpect(MockMvcResultMatchers.status().isOk());
+		Mockito.verify(this.repository).findOne("foo", "default", "master");
+		Mockito.verify(this.resources).findOne("foo", "default", "master", "foo.txt");
+	}
+
+	@Configuration
+	@EnableWebMvc
+	@Import(PropertyPlaceholderAutoConfiguration.class)
+	public static class ControllerConfiguration {
+
+		@Bean
+		public EnvironmentRepository environmentRepository() {
+			EnvironmentRepository repository = Mockito.mock(EnvironmentRepository.class);
+			return repository;
+		}
+
+		@Bean
+		public ResourceRepository resourceRepository() {
+			ResourceRepository repository = Mockito.mock(ResourceRepository.class);
+			return repository;
+		}
+
+		@Bean
+		public ResourceController controller() {
+			return new ResourceController(resourceRepository(), environmentRepository());
+		}
+
+	}
+
+}