Consistent and lenient HttpMethod resolution across all web modules

Issue: SPR-13776

spring-test/src/main/java/org/springframework/mock/web/MockMultipartHttpServletRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -128,7 +128,7 @@ public class MockMultipartHttpServletRequest extends MockHttpServletRequest impl
 
 	@Override
 	public HttpMethod getRequestMethod() {
-		return HttpMethod.valueOf(getMethod());
+		return HttpMethod.resolve(getMethod());
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/http/HttpHeaders.java

@@ -470,7 +470,7 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 	}
 
 	/**
-	 * Returns the value of the {@code Access-Control-Allow-Methods} response header.
+	 * Return the value of the {@code Access-Control-Allow-Methods} response header.
 	 */
 	public List<HttpMethod> getAccessControlAllowMethods() {
 		List<HttpMethod> result = new ArrayList<HttpMethod>();
@@ -478,7 +478,10 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 		if (value != null) {
 			String[] tokens = value.split(",\\s*");
 			for (String token : tokens) {
-				result.add(HttpMethod.valueOf(token));
+				HttpMethod resolved = HttpMethod.resolve(token);
+				if (resolved != null) {
+					result.add(resolved);
+				}
 			}
 		}
 		return result;
@@ -492,7 +495,7 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 	}
 
 	/**
-	 * Returns the value of the {@code Access-Control-Allow-Origin} response header.
+	 * Return the value of the {@code Access-Control-Allow-Origin} response header.
 	 */
 	public String getAccessControlAllowOrigin() {
 		return getFirst(ACCESS_CONTROL_ALLOW_ORIGIN);
@@ -550,11 +553,10 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 	}
 
 	/**
-	 * Returns the value of the {@code Access-Control-Request-Method} request header.
+	 * Return the value of the {@code Access-Control-Request-Method} request header.
 	 */
 	public HttpMethod getAccessControlRequestMethod() {
-		String value = getFirst(ACCESS_CONTROL_REQUEST_METHOD);
-		return (value != null ? HttpMethod.valueOf(value) : null);
+		return HttpMethod.resolve(getFirst(ACCESS_CONTROL_REQUEST_METHOD));
 	}
 
 	/**
@@ -615,12 +617,15 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 	public Set<HttpMethod> getAllow() {
 		String value = getFirst(ALLOW);
 		if (!StringUtils.isEmpty(value)) {
-			List<HttpMethod> allowedMethod = new ArrayList<HttpMethod>(5);
+			List<HttpMethod> result = new LinkedList<HttpMethod>();
 			String[] tokens = value.split(",\\s*");
 			for (String token : tokens) {
-				allowedMethod.add(HttpMethod.valueOf(token));
+				HttpMethod resolved = HttpMethod.resolve(token);
+				if (resolved != null) {
+					result.add(resolved);
+				}
 			}
-			return EnumSet.copyOf(allowedMethod);
+			return EnumSet.copyOf(result);
 		}
 		else {
 			return EnumSet.noneOf(HttpMethod.class);
@@ -635,7 +640,7 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 	}
 
 	/**
-	 * Returns the value of the {@code Cache-Control} header.
+	 * Return the value of the {@code Cache-Control} header.
 	 */
 	public String getCacheControl() {
 		return getFirst(CACHE_CONTROL);
@@ -656,7 +661,7 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 	}
 
 	/**
-	 * Returns the value of the {@code Connection} header.
+	 * Return the value of the {@code Connection} header.
 	 */
 	public List<String> getConnection() {
 		return getFirstValueAsList(CONNECTION);
@@ -920,7 +925,7 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 	}
 
 	/**
-	 * Returns the value of the {@code Range} header.
+	 * Return the value of the {@code Range} header.
 	 * <p>Returns an empty list when the range is unknown.
 	 */
 	public List<HttpRange> getRange() {
@@ -936,7 +941,7 @@ public class HttpHeaders implements MultiValueMap<String, String>, Serializable
 	}
 
 	/**
-	 * Returns the value of the {@code Upgrade} header.
+	 * Return the value of the {@code Upgrade} header.
 	 */
 	public String getUpgrade() {
 		return getFirst(UPGRADE);

spring-web/src/main/java/org/springframework/http/HttpMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -16,16 +16,52 @@
 
 package org.springframework.http;
 
+import java.util.HashMap;
+import java.util.Map;
+
 /**
  * Java 5 enumeration of HTTP request methods. Intended for use
  * with {@link org.springframework.http.client.ClientHttpRequest}
  * and {@link org.springframework.web.client.RestTemplate}.
  *
  * @author Arjen Poutsma
+ * @author Juergen Hoeller
  * @since 3.0
  */
 public enum HttpMethod {
 
-	GET, POST, HEAD, OPTIONS, PUT, PATCH, DELETE, TRACE
+	GET, HEAD, POST, PUT, PATCH, DELETE, OPTIONS, TRACE;
+
+
+	private static final Map<String, HttpMethod> mappings = new HashMap<String, HttpMethod>(8);
+
+	static {
+		for (HttpMethod httpMethod : values()) {
+			mappings.put(httpMethod.name(), httpMethod);
+		}
+	}
+
+
+	/**
+	 * Resolve the given method value to an {@code HttpMethod}.
+	 * @param method the method value as a String
+	 * @return the corresponding {@code HttpMethod}, or {@code null} if not found
+	 * @since 4.2.4
+	 */
+	public static HttpMethod resolve(String method) {
+		return (method != null ? mappings.get(method) : null);
+	}
+
+
+	/**
+	 * Determine whether this {@code HttpMethod} matches the given
+	 * method value.
+	 * @param method the method value as a String
+	 * @return {@code true} if it matches, {@code false} otherwise
+	 * @since 4.2.4
+	 */
+	public boolean matches(String method) {
+		return name().equals(method);
+	}
 
 }

spring-web/src/main/java/org/springframework/http/HttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -19,8 +19,8 @@ package org.springframework.http;
 import java.net.URI;
 
 /**
- * Represents an HTTP request message, consisting of {@linkplain #getMethod() method}
- * and {@linkplain #getURI() uri}.
+ * Represents an HTTP request message, consisting of
+ * {@linkplain #getMethod() method} and {@linkplain #getURI() uri}.
  *
  * @author Arjen Poutsma
  * @since 3.1
@@ -29,13 +29,14 @@ public interface HttpRequest extends HttpMessage {
 
 	/**
 	 * Return the HTTP method of the request.
-	 * @return the HTTP method as an HttpMethod enum value
+	 * @return the HTTP method as an HttpMethod enum value, or {@code null}
+	 * if not resolvable (e.g. in case of a non-standard HTTP method)
 	 */
 	HttpMethod getMethod();
 
 	/**
 	 * Return the URI of the request.
-	 * @return the URI of the request
+	 * @return the URI of the request (never {@code null})
 	 */
 	URI getURI();
 

spring-web/src/main/java/org/springframework/http/RequestEntity.java

@@ -20,7 +20,6 @@ import java.net.URI;
 import java.nio.charset.Charset;
 import java.util.Arrays;
 
-import org.springframework.util.Assert;
 import org.springframework.util.MultiValueMap;
 import org.springframework.util.ObjectUtils;
 
@@ -104,8 +103,6 @@ public class RequestEntity<T> extends HttpEntity<T> {
 	 */
 	public RequestEntity(T body, MultiValueMap<String, String> headers, HttpMethod method, URI url) {
 		super(body, headers);
-		Assert.notNull(method, "'method' is required");
-		Assert.notNull(url, "'url' is required");
 		this.method = method;
 		this.url = url;
 	}

spring-web/src/main/java/org/springframework/http/client/HttpComponentsAsyncClientHttpRequest.java

@@ -68,7 +68,7 @@ final class HttpComponentsAsyncClientHttpRequest extends AbstractBufferingAsyncC
 
 	@Override
 	public HttpMethod getMethod() {
-		return HttpMethod.valueOf(this.httpRequest.getMethod());
+		return HttpMethod.resolve(this.httpRequest.getMethod());
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/http/client/HttpComponentsClientHttpRequest.java

@@ -66,7 +66,7 @@ final class HttpComponentsClientHttpRequest extends AbstractBufferingClientHttpR
 
 	@Override
 	public HttpMethod getMethod() {
-		return HttpMethod.valueOf(this.httpRequest.getMethod());
+		return HttpMethod.resolve(this.httpRequest.getMethod());
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/http/client/HttpComponentsStreamingClientHttpRequest.java

@@ -65,7 +65,7 @@ final class HttpComponentsStreamingClientHttpRequest extends AbstractClientHttpR
 
 	@Override
 	public HttpMethod getMethod() {
-		return HttpMethod.valueOf(this.httpRequest.getMethod());
+		return HttpMethod.resolve(this.httpRequest.getMethod());
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/http/client/SimpleBufferingAsyncClientHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -57,7 +57,7 @@ final class SimpleBufferingAsyncClientHttpRequest extends AbstractBufferingAsync
 
 	@Override
 	public HttpMethod getMethod() {
-		return HttpMethod.valueOf(this.connection.getRequestMethod());
+		return HttpMethod.resolve(this.connection.getRequestMethod());
 	}
 
 	@Override
@@ -78,8 +78,8 @@ final class SimpleBufferingAsyncClientHttpRequest extends AbstractBufferingAsync
 			@Override
 			public ClientHttpResponse call() throws Exception {
 				SimpleBufferingClientHttpRequest.addHeaders(connection, headers);
-				// JDK < 1.8 doesn't support getOutputStream with HTTP DELETE
-				if (HttpMethod.DELETE.equals(getMethod()) && bufferedOutput.length == 0) {
+				// JDK <1.8 doesn't support getOutputStream with HTTP DELETE
+				if (HttpMethod.DELETE == getMethod() && bufferedOutput.length == 0) {
 					connection.setDoOutput(false);
 				}
 				if (connection.getDoOutput() && outputStreaming) {

spring-web/src/main/java/org/springframework/http/client/SimpleBufferingClientHttpRequest.java

@@ -52,7 +52,7 @@ final class SimpleBufferingClientHttpRequest extends AbstractBufferingClientHttp
 
 	@Override
 	public HttpMethod getMethod() {
-		return HttpMethod.valueOf(this.connection.getRequestMethod());
+		return HttpMethod.resolve(this.connection.getRequestMethod());
 	}
 
 	@Override
@@ -69,8 +69,8 @@ final class SimpleBufferingClientHttpRequest extends AbstractBufferingClientHttp
 	protected ClientHttpResponse executeInternal(HttpHeaders headers, byte[] bufferedOutput) throws IOException {
 		addHeaders(this.connection, headers);
 
-		// JDK < 1.8 doesn't support getOutputStream with HTTP DELETE
-		if (HttpMethod.DELETE.equals(getMethod()) && bufferedOutput.length == 0) {
+		// JDK <1.8 doesn't support getOutputStream with HTTP DELETE
+		if (HttpMethod.DELETE == getMethod() && bufferedOutput.length == 0) {
 			this.connection.setDoOutput(false);
 		}
 

spring-web/src/main/java/org/springframework/http/client/SimpleStreamingAsyncClientHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -63,7 +63,7 @@ final class SimpleStreamingAsyncClientHttpRequest extends AbstractAsyncClientHtt
 
 	@Override
 	public HttpMethod getMethod() {
-		return HttpMethod.valueOf(this.connection.getRequestMethod());
+		return HttpMethod.resolve(this.connection.getRequestMethod());
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/http/client/SimpleStreamingClientHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -53,7 +53,7 @@ final class SimpleStreamingClientHttpRequest extends AbstractClientHttpRequest {
 
 
 	public HttpMethod getMethod() {
-		return HttpMethod.valueOf(this.connection.getRequestMethod());
+		return HttpMethod.resolve(this.connection.getRequestMethod());
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/http/server/ServletServerHttpRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -55,8 +55,6 @@ public class ServletServerHttpRequest implements ServerHttpRequest {
 
 	protected static final String FORM_CHARSET = "UTF-8";
 
-	private static final String METHOD_POST = "POST";
-
 
 	private final HttpServletRequest servletRequest;
 
@@ -84,7 +82,7 @@ public class ServletServerHttpRequest implements ServerHttpRequest {
 
 	@Override
 	public HttpMethod getMethod() {
-		return HttpMethod.valueOf(this.servletRequest.getMethod());
+		return HttpMethod.resolve(this.servletRequest.getMethod());
 	}
 
 	@Override
@@ -166,9 +164,22 @@ public class ServletServerHttpRequest implements ServerHttpRequest {
 		}
 	}
 
-	private boolean isFormPost(HttpServletRequest request) {
-		return (request.getContentType() != null && request.getContentType().contains(FORM_CONTENT_TYPE) &&
-				METHOD_POST.equalsIgnoreCase(request.getMethod()));
+	@Override
+	public ServerHttpAsyncRequestControl getAsyncRequestControl(ServerHttpResponse response) {
+		if (this.asyncRequestControl == null) {
+			Assert.isInstanceOf(ServletServerHttpResponse.class, response);
+			ServletServerHttpResponse servletServerResponse = (ServletServerHttpResponse) response;
+			this.asyncRequestControl = new ServletServerHttpAsyncRequestControl(this, servletServerResponse);
+		}
+		return this.asyncRequestControl;
+	}
+
+
+
+	private static boolean isFormPost(HttpServletRequest request) {
+		String contentType = request.getContentType();
+		return (contentType != null && contentType.contains(FORM_CONTENT_TYPE) &&
+				HttpMethod.POST.matches(request.getMethod()));
 	}
 
 	/**
@@ -177,7 +188,7 @@ public class ServletServerHttpRequest implements ServerHttpRequest {
 	 * from the body, which can fail if any other code has used ServletRequest
 	 * to access a parameter thus causing the input stream to be "consumed".
 	 */
-	private InputStream getBodyFromServletRequestParameters(HttpServletRequest request) throws IOException {
+	private static InputStream getBodyFromServletRequestParameters(HttpServletRequest request) throws IOException {
 		ByteArrayOutputStream bos = new ByteArrayOutputStream(1024);
 		Writer writer = new OutputStreamWriter(bos, FORM_CHARSET);
 
@@ -205,14 +216,4 @@ public class ServletServerHttpRequest implements ServerHttpRequest {
 		return new ByteArrayInputStream(bos.toByteArray());
 	}
 
-	@Override
-	public ServerHttpAsyncRequestControl getAsyncRequestControl(ServerHttpResponse response) {
-		if (this.asyncRequestControl == null) {
-			Assert.isInstanceOf(ServletServerHttpResponse.class, response);
-			ServletServerHttpResponse servletServerResponse = (ServletServerHttpResponse) response;
-			this.asyncRequestControl = new ServletServerHttpAsyncRequestControl(this, servletServerResponse);
-		}
-		return this.asyncRequestControl;
-	}
-
 }

spring-web/src/main/java/org/springframework/web/HttpRequestMethodNotSupportedException.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -17,8 +17,9 @@
 package org.springframework.web;
 
 import java.util.Collection;
-import java.util.Collections;
-import java.util.LinkedHashSet;
+import java.util.EnumSet;
+import java.util.LinkedList;
+import java.util.List;
 import java.util.Set;
 import javax.servlet.ServletException;
 
@@ -105,11 +106,14 @@ public class HttpRequestMethodNotSupportedException extends ServletException {
 	 * Return the actually supported HTTP methods, if known, as {@link HttpMethod} instances.
 	 */
 	public Set<HttpMethod> getSupportedHttpMethods() {
-		Set<HttpMethod> supportedMethods = new LinkedHashSet<HttpMethod>();
+		List<HttpMethod> supportedMethods = new LinkedList<HttpMethod>();
 		for (String value : this.supportedMethods) {
-			supportedMethods.add(HttpMethod.valueOf(value));
+			HttpMethod resolved = HttpMethod.resolve(value);
+			if (resolved != null) {
+				supportedMethods.add(resolved);
+			}
 		}
-		return Collections.unmodifiableSet(supportedMethods);
+		return EnumSet.copyOf(supportedMethods);
 	}
 
 }

spring-web/src/main/java/org/springframework/web/bind/annotation/RequestMethod.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -17,16 +17,14 @@
 package org.springframework.web.bind.annotation;
 
 /**
- * Java 5 enumeration of HTTP request methods. Intended for use
- * with the {@link RequestMapping#method()} attribute of the
- * {@link RequestMapping} annotation.
+ * Java 5 enumeration of HTTP request methods. Intended for use with the
+ * {@link RequestMapping#method()} attribute of the {@link RequestMapping} annotation.
  *
  * <p>Note that, by default, {@link org.springframework.web.servlet.DispatcherServlet}
  * supports GET, HEAD, POST, PUT, PATCH and DELETE only. DispatcherServlet will
- * process TRACE and OPTIONS with the default HttpServlet behavior unless
- * explicitly told to dispatch those request types as well: Check out
- * the "dispatchOptionsRequest" and "dispatchTraceRequest" properties,
- * switching them to "true" if necessary.
+ * process TRACE and OPTIONS with the default HttpServlet behavior unless explicitly
+ * told to dispatch those request types as well: Check out the "dispatchOptionsRequest"
+ * and "dispatchTraceRequest" properties, switching them to "true" if necessary.
  *
  * @author Juergen Hoeller
  * @since 2.5

spring-web/src/main/java/org/springframework/web/context/request/ServletWebRequest.java

@@ -106,7 +106,7 @@ public class ServletWebRequest extends ServletRequestAttributes implements Nativ
 	 * @since 4.0.2
 	 */
 	public HttpMethod getHttpMethod() {
-		return HttpMethod.valueOf(getRequest().getMethod());
+		return HttpMethod.resolve(getRequest().getMethod());
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/web/cors/CorsConfiguration.java

@@ -344,10 +344,13 @@ public class CorsConfiguration {
 		List<HttpMethod> result = new ArrayList<HttpMethod>(allowedMethods.size());
 		boolean allowed = false;
 		for (String method : allowedMethods) {
-			if (requestMethod.name().equals(method)) {
+			if (requestMethod.matches(method)) {
 				allowed = true;
 			}
-			result.add(HttpMethod.valueOf(method));
+			HttpMethod resolved = HttpMethod.resolve(method);
+			if (resolved != null) {
+				result.add(resolved);
+			}
 		}
 		return (allowed ? result : null);
 	}

spring-web/src/main/java/org/springframework/web/cors/CorsUtils.java

@@ -28,7 +28,7 @@ import org.springframework.http.HttpMethod;
  * @author Sebastien Deleuze
  * @since 4.2
  */
-public class CorsUtils {
+public abstract class CorsUtils {
 
 	/**
 	 * Returns {@code true} if the request is a valid CORS one.
@@ -41,7 +41,7 @@ public class CorsUtils {
 	 * Returns {@code true} if the request is a valid CORS pre-flight one.
 	 */
 	public static boolean isPreFlightRequest(HttpServletRequest request) {
-		return (isCorsRequest(request) && request.getMethod().equals(HttpMethod.OPTIONS.name()) &&
+		return (isCorsRequest(request) && HttpMethod.OPTIONS.matches(request.getMethod()) &&
 				request.getHeader(HttpHeaders.ACCESS_CONTROL_REQUEST_METHOD) != null);
 	}
 

spring-web/src/main/java/org/springframework/web/filter/ShallowEtagHeaderFilter.java

@@ -144,7 +144,7 @@ public class ShallowEtagHeaderFilter extends OncePerRequestFilter {
 	protected boolean isEligibleForEtag(HttpServletRequest request, HttpServletResponse response,
 			int responseStatusCode, InputStream inputStream) {
 
-		if (responseStatusCode >= 200 && responseStatusCode < 300 && HttpMethod.GET.name().equals(request.getMethod())) {
+		if (responseStatusCode >= 200 && responseStatusCode < 300 && HttpMethod.GET.matches(request.getMethod())) {
 			String cacheControl = null;
 			if (servlet3Present) {
 				cacheControl = response.getHeader(HEADER_CACHE_CONTROL);

spring-web/src/main/java/org/springframework/web/multipart/support/AbstractMultipartHttpServletRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2012 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -61,7 +61,7 @@ public abstract class AbstractMultipartHttpServletRequest extends HttpServletReq
 
 	@Override
 	public HttpMethod getRequestMethod() {
-		return HttpMethod.valueOf(getRequest().getMethod());
+		return HttpMethod.resolve(getRequest().getMethod());
 	}
 
 	@Override

spring-web/src/main/java/org/springframework/web/util/ContentCachingRequestWrapper.java

@@ -30,6 +30,8 @@ import javax.servlet.ServletInputStream;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletRequestWrapper;
 
+import org.springframework.http.HttpMethod;
+
 /**
  * {@link javax.servlet.http.HttpServletRequest} wrapper that caches all content read from
  * the {@linkplain #getInputStream() input stream} and {@linkplain #getReader() reader},
@@ -46,8 +48,6 @@ public class ContentCachingRequestWrapper extends HttpServletRequestWrapper {
 
 	private static final String FORM_CONTENT_TYPE = "application/x-www-form-urlencoded";
 
-	private static final String METHOD_POST = "POST";
-
 
 	private final ByteArrayOutputStream cachedContent;
 
@@ -125,7 +125,7 @@ public class ContentCachingRequestWrapper extends HttpServletRequestWrapper {
 	private boolean isFormPost() {
 		String contentType = getContentType();
 		return (contentType != null && contentType.contains(FORM_CONTENT_TYPE) &&
-				METHOD_POST.equalsIgnoreCase(getMethod()));
+				HttpMethod.POST.matches(getMethod()));
 	}
 
 	private void writeRequestParametersToCachedContent() {

spring-web/src/test/java/org/springframework/mock/web/test/MockMultipartHttpServletRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2013 the original author or authors.
+ * Copyright 2002-2015 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.
@@ -128,7 +128,7 @@ public class MockMultipartHttpServletRequest extends MockHttpServletRequest impl
 
 	@Override
 	public HttpMethod getRequestMethod() {
-		return HttpMethod.valueOf(getMethod());
+		return HttpMethod.resolve(getMethod());
 	}
 
 	@Override

spring-webmvc/src/main/java/org/springframework/web/servlet/DispatcherServlet.java

@@ -1137,9 +1137,8 @@ public class DispatcherServlet extends FrameworkServlet {
 					"] in DispatcherServlet with name '" + getServletName() + "'");
 		}
 		if (this.throwExceptionIfNoHandlerFound) {
-			ServletServerHttpRequest sshr = new ServletServerHttpRequest(request);
-			throw new NoHandlerFoundException(
-					sshr.getMethod().name(), sshr.getServletRequest().getRequestURI(), sshr.getHeaders());
+			throw new NoHandlerFoundException(request.getMethod(), getRequestUri(request),
+					new ServletServerHttpRequest(request).getHeaders());
 		}
 		else {
 			response.sendError(HttpServletResponse.SC_NOT_FOUND);

spring-webmvc/src/main/java/org/springframework/web/servlet/FrameworkServlet.java

@@ -42,6 +42,7 @@ import org.springframework.context.i18n.SimpleLocaleContext;
 import org.springframework.core.GenericTypeResolver;
 import org.springframework.core.annotation.AnnotationAwareOrderComparator;
 import org.springframework.core.env.ConfigurableEnvironment;
+import org.springframework.http.HttpMethod;
 import org.springframework.util.Assert;
 import org.springframework.util.ClassUtils;
 import org.springframework.util.ObjectUtils;
@@ -831,15 +832,13 @@ public abstract class FrameworkServlet extends HttpServletBean implements Applic
 
 
 	/**
-	 * Override the parent class implementation in order to intercept PATCH
-	 * requests.
+	 * Override the parent class implementation in order to intercept PATCH requests.
 	 */
 	@Override
 	protected void service(HttpServletRequest request, HttpServletResponse response)
 			throws ServletException, IOException {
 
-		String method = request.getMethod();
-		if (method.equalsIgnoreCase(RequestMethod.PATCH.name())) {
+		if (HttpMethod.PATCH.matches(request.getMethod())) {
 			processRequest(request, response);
 		}
 		else {

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/AbstractMessageConverterMethodArgumentResolver.java

@@ -22,8 +22,8 @@ import java.io.PushbackInputStream;
 import java.lang.annotation.Annotation;
 import java.lang.reflect.Type;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.Collections;
+import java.util.EnumSet;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
@@ -63,8 +63,8 @@ import org.springframework.web.method.support.HandlerMethodArgumentResolver;
  */
 public abstract class AbstractMessageConverterMethodArgumentResolver implements HandlerMethodArgumentResolver {
 
-	private static final List<HttpMethod> SUPPORTED_METHODS =
-			Arrays.asList(HttpMethod.POST, HttpMethod.PUT, HttpMethod.PATCH);
+	private static final Set<HttpMethod> SUPPORTED_METHODS =
+			EnumSet.of(HttpMethod.POST, HttpMethod.PUT, HttpMethod.PATCH);
 
 	private static final Object NO_VALUE = new Object();
 
@@ -228,8 +228,8 @@ public abstract class AbstractMessageConverterMethodArgumentResolver implements
 		}
 
 		if (body == NO_VALUE) {
-			if (!SUPPORTED_METHODS.contains(httpMethod)
-					|| (noContentType && inputMessage.getBody() == null)) {
+			if (httpMethod == null || !SUPPORTED_METHODS.contains(httpMethod) ||
+					(noContentType && inputMessage.getBody() == null)) {
 				return null;
 			}
 			throw new HttpMediaTypeNotSupportedException(contentType, this.allSupportedMediaTypes);

spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/HttpEntityMethodProcessor.java

@@ -19,7 +19,6 @@ package org.springframework.web.servlet.mvc.method.annotation;
 import java.io.IOException;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
-import java.net.URI;
 import java.util.List;
 
 import org.springframework.core.MethodParameter;
@@ -122,9 +121,8 @@ public class HttpEntityMethodProcessor extends AbstractMessageConverterMethodPro
 
 		Object body = readWithMessageConverters(webRequest, parameter, paramType);
 		if (RequestEntity.class == parameter.getParameterType()) {
-			URI url = inputMessage.getURI();
-			HttpMethod httpMethod = inputMessage.getMethod();
-			return new RequestEntity<Object>(body, inputMessage.getHeaders(), httpMethod, url);
+			return new RequestEntity<Object>(body, inputMessage.getHeaders(),
+					inputMessage.getMethod(), inputMessage.getURI());
 		}
 		else {
 			return new HttpEntity<Object>(body, inputMessage.getHeaders());
@@ -172,8 +170,7 @@ public class HttpEntityMethodProcessor extends AbstractMessageConverterMethodPro
 		Object body = responseEntity.getBody();
 		if (responseEntity instanceof ResponseEntity) {
 			outputMessage.setStatusCode(((ResponseEntity<?>) responseEntity).getStatusCode());
-			if (inputMessage.getMethod().equals(HttpMethod.GET) &&
-					isResourceNotModified(inputMessage, outputMessage)) {
+			if (HttpMethod.GET == inputMessage.getMethod() && isResourceNotModified(inputMessage, outputMessage)) {
 				outputMessage.setStatusCode(HttpStatus.NOT_MODIFIED);
 				// Ensure headers are flushed, no body should be written.
 				outputMessage.flush();

spring-websocket/src/main/java/org/springframework/web/socket/server/support/AbstractHandshakeHandler.java

@@ -231,7 +231,7 @@ public abstract class AbstractHandshakeHandler implements HandshakeHandler, Life
 			logger.trace("Processing request " + request.getURI() + " with headers=" + headers);
 		}
 		try {
-			if (!HttpMethod.GET.equals(request.getMethod())) {
+			if (HttpMethod.GET != request.getMethod()) {
 				response.setStatusCode(HttpStatus.METHOD_NOT_ALLOWED);
 				response.getHeaders().setAllow(Collections.singleton(HttpMethod.GET));
 				if (logger.isErrorEnabled()) {
@@ -320,8 +320,8 @@ public abstract class AbstractHandshakeHandler implements HandshakeHandler, Life
 					". Supported versions: " + Arrays.toString(getSupportedVersions()));
 		}
 		response.setStatusCode(HttpStatus.UPGRADE_REQUIRED);
-		response.getHeaders().put(WebSocketHttpHeaders.SEC_WEBSOCKET_VERSION,
-				Arrays.asList(StringUtils.arrayToCommaDelimitedString(getSupportedVersions())));
+		response.getHeaders().set(WebSocketHttpHeaders.SEC_WEBSOCKET_VERSION,
+				StringUtils.arrayToCommaDelimitedString(getSupportedVersions()));
 	}
 
 	/**

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/support/AbstractSockJsService.java

@@ -544,7 +544,7 @@ public abstract class AbstractSockJsService implements SockJsService, CorsConfig
 
 		@Override
 		public void handle(ServerHttpRequest request, ServerHttpResponse response) throws IOException {
-			if (HttpMethod.GET.equals(request.getMethod())) {
+			if (HttpMethod.GET == request.getMethod()) {
 				addNoCacheHeaders(response);
 				if (checkOrigin(request, response)) {
 					response.getHeaders().setContentType(new MediaType("application", "json", UTF8_CHARSET));
@@ -554,7 +554,7 @@ public abstract class AbstractSockJsService implements SockJsService, CorsConfig
 				}
 
 			}
-			else if (HttpMethod.OPTIONS.equals(request.getMethod())) {
+			else if (HttpMethod.OPTIONS == request.getMethod()) {
 				if (checkOrigin(request, response)) {
 					addCacheHeaders(response);
 					response.setStatusCode(HttpStatus.NO_CONTENT);

spring-websocket/src/main/java/org/springframework/web/socket/sockjs/transport/TransportHandlingSockJsService.java

@@ -247,8 +247,8 @@ public class TransportHandlingSockJsService extends AbstractSockJsService implem
 
 		try {
 			HttpMethod supportedMethod = transportType.getHttpMethod();
-			if (!supportedMethod.equals(request.getMethod())) {
-				if (HttpMethod.OPTIONS.equals(request.getMethod()) && transportType.supportsCors()) {
+			if (supportedMethod != request.getMethod()) {
+				if (HttpMethod.OPTIONS == request.getMethod() && transportType.supportsCors()) {
 					if (checkOrigin(request, response, HttpMethod.OPTIONS, supportedMethod)) {
 						response.setStatusCode(HttpStatus.NO_CONTENT);
 						addCacheHeaders(response);