Use HttpHeaders explicitly in endpoint method

Otherwise headers become case sensitive in downstream code.

Fixes gh-240

spring-cloud-config-monitor/src/main/java/org/springframework/cloud/config/monitor/FileMonitorConfiguration.java

@@ -41,9 +41,9 @@ import org.springframework.context.SmartLifecycle;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.core.io.Resource;
 import org.springframework.core.io.ResourceLoader;
+import org.springframework.http.HttpHeaders;
 import org.springframework.scheduling.annotation.EnableScheduling;
 import org.springframework.scheduling.annotation.Scheduled;
-import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.PatternMatchUtils;
 
 import lombok.extern.apachecommons.CommonsLog;
@@ -176,9 +176,8 @@ public class FileMonitorConfiguration implements SmartLifecycle, ResourceLoaderA
 	@Scheduled(fixedRateString = "${spring.cloud.config.server.monitor.fixedDelay:5000}")
 	public void poll() {
 		for (File file : filesFromEvents()) {
-			this.endpoint.notifyByPath(new LinkedMultiValueMap<String, String>(),
-					Collections.<String, Object> singletonMap("path",
-							file.getAbsolutePath()));
+			this.endpoint.notifyByPath(new HttpHeaders(), Collections
+					.<String, Object> singletonMap("path", file.getAbsolutePath()));
 		}
 	}
 

spring-cloud-config-monitor/src/main/java/org/springframework/cloud/config/monitor/PropertyPathEndpoint.java

@@ -31,8 +31,8 @@ import org.springframework.context.ApplicationContext;
 import org.springframework.context.ApplicationContextAware;
 import org.springframework.context.ApplicationEventPublisher;
 import org.springframework.context.ApplicationEventPublisherAware;
+import org.springframework.http.HttpHeaders;
 import org.springframework.http.MediaType;
-import org.springframework.util.MultiValueMap;
 import org.springframework.util.StringUtils;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestHeader;
@@ -75,7 +75,7 @@ public class PropertyPathEndpoint
 	}
 
 	@RequestMapping(method = RequestMethod.POST)
-	public Set<String> notifyByPath(@RequestHeader MultiValueMap<String, String> headers,
+	public Set<String> notifyByPath(@RequestHeader HttpHeaders headers,
 			@RequestBody Map<String, Object> request) {
 		PropertyPathNotification notification = this.extractor.extract(headers, request);
 		if (notification != null) {
@@ -100,7 +100,7 @@ public class PropertyPathEndpoint
 	}
 
 	@RequestMapping(method = RequestMethod.POST, consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
-	public Set<String> notifyByForm(@RequestHeader MultiValueMap<String, String> headers, @RequestParam("path") List<String> request) {
+	public Set<String> notifyByForm(@RequestHeader HttpHeaders headers, @RequestParam("path") List<String> request) {
 		Map<String, Object> map = new HashMap<>();
 		String key = "path";
 		map.put(key, request);

spring-cloud-config-monitor/src/test/java/org/springframework/cloud/config/monitor/PropertyPathEndpointTests.java

@@ -25,7 +25,7 @@ import java.util.List;
 import org.junit.Before;
 import org.junit.Test;
 import org.springframework.context.support.StaticApplicationContext;
-import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.http.HttpHeaders;
 
 /**
  * @author Dave Syer
@@ -46,9 +46,8 @@ public class PropertyPathEndpointTests {
 
 	@Test
 	public void testNotifyByForm() throws Exception {
-		assertEquals(0,
-				this.endpoint.notifyByForm(new LinkedMultiValueMap<String, String>(),
-						new ArrayList<String>()).size());
+		assertEquals(0, this.endpoint
+				.notifyByForm(new HttpHeaders(), new ArrayList<String>()).size());
 	}
 
 	@Test
@@ -57,16 +56,15 @@ public class PropertyPathEndpointTests {
 		request.add("/foo/bar.properties");
 		request.add("/application.properties");
 		assertEquals("[bar, *]",
-				this.endpoint
-						.notifyByForm(new LinkedMultiValueMap<String, String>(), request)
-						.toString());
+				this.endpoint.notifyByForm(new HttpHeaders(), request).toString());
 	}
 
 	@Test
 	public void testNotifyAll() throws Exception {
-		assertEquals("[*]", this.endpoint
-				.notifyByPath(new LinkedMultiValueMap<String, String>(), Collections
-						.<String, Object> singletonMap("path", "application.yml"))
+		assertEquals("[*]",
+				this.endpoint
+						.notifyByPath(new HttpHeaders(), Collections
+								.<String, Object> singletonMap("path", "application.yml"))
 				.toString());
 	}
 }