SWS-950 Support RFC 7230 for HTTP headers

Make HTTP headers handle case insensitivity.

Author: gregturn

spring-ws-core/src/main/java/org/springframework/ws/transport/http/HttpUrlConnection.java

@@ -23,6 +23,7 @@
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
@@ -39,6 +40,7 @@
  *
  * @author Arjen Poutsma
  * @author Greg Turnquist
+ * @author Oddgeir Gitlestad
  * @since 1.0.0
  */
 public class HttpUrlConnection extends AbstractHttpSenderConnection {
@@ -119,12 +121,20 @@ public Iterator<String> getResponseHeaderNames() throws IOException {
 
 	@Override
 	public Iterator<String> getResponseHeaders(String name) throws IOException {
-		Map<String, List<String>> mapHeader = connection.getHeaderFields();
-		List<String> listHeaderValues = mapHeader.get(name);
-		if (listHeaderValues == null) {
+		Map<String, List<String>> headersListMappedByLowerCaseName = new HashMap<>();
+
+		for (String key : connection.getHeaderFields().keySet()) {
+			if (key != null) {
+				headersListMappedByLowerCaseName.put(key.toLowerCase(), connection.getHeaderFields().get(key));
+			}
+		}
+
+		List<String> headerValues = headersListMappedByLowerCaseName.get(name.toLowerCase());
+
+		if (headerValues == null) {
 		    return Collections.<String>emptyList().iterator();
 		} else {
-		    return listHeaderValues.iterator();
+		    return headerValues.iterator();
 		}
 	}
 

spring-ws-core/src/test/java/org/springframework/ws/transport/http/AbstractHttpWebServiceMessageSenderIntegrationTestCase.java

@@ -36,11 +36,9 @@
 import javax.xml.transform.TransformerFactory;
 import javax.xml.transform.dom.DOMResult;
 
-import static org.custommonkey.xmlunit.XMLAssert.assertXMLEqual;
 import org.custommonkey.xmlunit.XMLUnit;
 import org.junit.After;
 import org.junit.Assert;
-import static org.junit.Assert.assertEquals;
 import org.junit.Before;
 import org.junit.Test;
 import org.mortbay.jetty.Server;
@@ -59,6 +57,9 @@
 import org.springframework.xml.transform.StringResult;
 import org.springframework.xml.transform.StringSource;
 
+import static org.custommonkey.xmlunit.XMLAssert.*;
+import static org.junit.Assert.assertEquals;
+
 public abstract class AbstractHttpWebServiceMessageSenderIntegrationTestCase {
 
 	private Server jettyServer;
@@ -283,7 +284,7 @@ protected void doPost(HttpServletRequest httpServletRequest, HttpServletResponse
 
 				httpServletResponse.setStatus(responseStatus);
 				if (response) {
-					httpServletResponse.setContentType("text/xml");
+					httpServletResponse.addHeader("content-type", "text/xml");
 					if (contentLength != null) {
 						httpServletResponse.setContentLength(contentLength);
 					}