Allow HttpPutFormContentFilter to be disabled

Add `spring.mvc.formcontent.putfilter.enabled` property to allow the
HttpPutFormContentFilter to be disabled.

Fixes gh-6519

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

@@ -122,6 +122,7 @@ public class WebMvcAutoConfiguration {
 
 	@Bean
 	@ConditionalOnMissingBean(HttpPutFormContentFilter.class)
+	@ConditionalOnProperty(prefix = "spring.mvc.formcontent.putfilter", name = "enabled", matchIfMissing = true)
 	public OrderedHttpPutFormContentFilter httpPutFormContentFilter() {
 		return new OrderedHttpPutFormContentFilter();
 	}

spring-boot-autoconfigure/src/main/resources/META-INF/additional-spring-configuration-metadata.json

@@ -148,6 +148,12 @@
     "description": "Enable resolution of favicon.ico.",
     "defaultValue": true
   },
+  {
+    "name": "spring.mvc.formcontent.putfilter.enabled",
+    "type": "java.lang.Boolean",
+    "description": "Enable Spring's HttpPutFormContentFilter.",
+    "defaultValue": true
+  },
   {
     "name": "spring.rabbitmq.dynamic",
     "type": "java.lang.Boolean",

spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/WebMvcAutoConfigurationTests.java

@@ -476,6 +476,13 @@ public class WebMvcAutoConfigurationTests {
 				is(equalTo(1)));
 	}
 
+	@Test
+	public void httpPutFormContentFilterCanBeDisabled() throws Exception {
+		load((Class<?>) null, "spring.mvc.formcontent.putfilter.enabled=false");
+		assertThat(this.context.getBeansOfType(HttpPutFormContentFilter.class).size(),
+				is(equalTo(0)));
+	}
+
 	@Test
 	public void customConfigurableWebBindingInitializer() {
 		load(CustomConfigurableWebBindingInitializer.class);

spring-boot-docs/src/main/asciidoc/appendix-application-properties.adoc

@@ -307,6 +307,7 @@ content into your application; rather pick only the properties that you need.
 	spring.mvc.dispatch-trace-request=false # Dispatch TRACE requests to the FrameworkServlet doService method.
 	spring.mvc.dispatch-options-request=false # Dispatch OPTIONS requests to the FrameworkServlet doService method.
 	spring.mvc.favicon.enabled=true # Enable resolution of favicon.ico.
+	spring.mvc.formcontent.putfilter.enabled=true # Enable Spring's HttpPutFormContentFilter.
 	spring.mvc.ignore-default-model-on-redirect=true # If the content of the "default" model should be ignored during redirect scenarios.
 	spring.mvc.locale= # Locale to use.
 	spring.mvc.media-types.*= # Maps file extensions to media types for content negotiation.