Consistently pass param info to ServerWebInputException

Issue: SPR-17232

Author: rstoyanchev

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/AbstractMessageReaderArgumentResolver.java

@@ -218,8 +218,9 @@ private Throwable handleReadError(MethodParameter parameter, Throwable ex) {
 				new ServerWebInputException("Failed to read HTTP message", parameter, ex) : ex);
 	}
 
-	private ServerWebInputException handleMissingBody(MethodParameter param) {
-		return new ServerWebInputException("Request body is missing: " + param.getExecutable().toGenericString());
+	private ServerWebInputException handleMissingBody(MethodParameter parameter) {
+		String paramInfo = parameter.getExecutable().toGenericString();
+		return new ServerWebInputException("Request body is missing: " + paramInfo, parameter);
 	}
 
 	/**

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/MatrixVariableMethodArgumentResolver.java

@@ -120,8 +120,9 @@ else if (paramValues.size() == 1) {
 
 	@Override
 	protected void handleMissingValue(String name, MethodParameter parameter) throws ServerWebInputException {
-		throw new ServerWebInputException("Missing matrix variable '" + name +
-				"' for method parameter of type " + parameter.getNestedParameterType().getSimpleName());
+		String paramInfo = parameter.getNestedParameterType().getSimpleName();
+		throw new ServerWebInputException("Missing matrix variable '" + name + "' " +
+				"for method parameter of type " + paramInfo, parameter);
 	}
 
 

spring-webflux/src/main/java/org/springframework/web/reactive/result/method/annotation/RequestHeaderMethodArgumentResolver.java

@@ -90,8 +90,8 @@ protected Object resolveNamedValue(String name, MethodParameter parameter, Serve
 	@Override
 	protected void handleMissingValue(String name, MethodParameter parameter) {
 		String type = parameter.getNestedParameterType().getSimpleName();
-		throw new ServerWebInputException("Missing request header '" + name +
-				"' for method parameter of type " + type);
+		throw new ServerWebInputException("Missing request header '" + name + "' " +
+				"for method parameter of type " + type, parameter);
 	}