Add OrderedHiddenHttpMethodFilter

Add OrderedHiddenHttpMethodFilter and use it in WebMvcAutoConfiguration
to ensure that it is applied before Spring Security.

Fixes gh-2773

Author: philwebb

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/WebMvcAutoConfiguration.java

@@ -39,6 +39,7 @@
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnWebApplication;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
+import org.springframework.boot.context.web.OrderedHiddenHttpMethodFilter;
 import org.springframework.context.ResourceLoaderAware;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -127,7 +128,7 @@ public class WebMvcAutoConfiguration {
 	@Bean
 	@ConditionalOnMissingBean(HiddenHttpMethodFilter.class)
 	public HiddenHttpMethodFilter hiddenHttpMethodFilter() {
-		return new HiddenHttpMethodFilter();
+		return new OrderedHiddenHttpMethodFilter();
 	}
 
 	// Defined as a nested config to ensure WebMvcConfigurerAdapter is not read when not

spring-boot/src/main/java/org/springframework/boot/context/web/OrderedHiddenHttpMethodFilter.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright 2012-2015 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.boot.context.web;
+
+import org.springframework.core.Ordered;
+import org.springframework.web.filter.HiddenHttpMethodFilter;
+
+/**
+ * {@link HiddenHttpMethodFilter} that also implements {@link Ordered}.
+ *
+ * @author Phillip Webb
+ * @since 1.2.4
+ */
+public class OrderedHiddenHttpMethodFilter extends HiddenHttpMethodFilter implements
+		Ordered {
+
+	/**
+	 * The default order is high to ensure the filter is applied before Spring Security.
+	 */
+	public static final int DEFAULT_ORDER = Ordered.HIGHEST_PRECEDENCE + 10;
+
+	private int order = DEFAULT_ORDER;
+
+	@Override
+	public int getOrder() {
+		return this.order;
+	}
+
+	/**
+	 * Set the order for this filter.
+	 * @param order the order to set
+	 */
+	public void setOrder(int order) {
+		this.order = order;
+	}
+
+}