StandardServletMultipartResolver accepts any HTTP method for multipart

Issue: SPR-16975

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

@@ -46,7 +46,6 @@ import org.springframework.web.multipart.MultipartResolver;
  *	 // ...
  *	 @Override
  *	 protected void customizeRegistration(ServletRegistration.Dynamic registration) {
- *
  *     // Optionally also set maxFileSize, maxRequestSize, fileSizeThreshold
  *     registration.setMultipartConfig(new MultipartConfigElement("/tmp"));
  *   }
@@ -80,12 +79,7 @@ public class StandardServletMultipartResolver implements MultipartResolver {
 
 	@Override
 	public boolean isMultipart(HttpServletRequest request) {
-		// Same check as in Commons FileUpload...
-		if (!"post".equalsIgnoreCase(request.getMethod())) {
-			return false;
-		}
-		String contentType = request.getContentType();
-		return StringUtils.startsWithIgnoreCase(contentType, "multipart/");
+		return StringUtils.startsWithIgnoreCase(request.getContentType(), "multipart/");
 	}
 
 	@Override