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WebAsyncManager defensively ignores attribute type mismatch 

Issue: SPR-15709
This commit is contained in:
Juergen Hoeller 2017-06-30 01:53:30 +02:00
parent af69c5b6a9
commit c4694c3f5c
1 changed files with 13 additions and 4 deletions
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17
spring-web/src/main/java/org/springframework/web/context/request/async/WebAsyncUtils.java
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@ -1,5 +1,5 @@
/*
* Copyright 2002-2016 the original author or authors.
* Copyright 2002-2017 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.
@ -32,7 +32,8 @@ import org.springframework.web.context.request.WebRequest;
*/
public abstract class WebAsyncUtils {
public static final String WEB_ASYNC_MANAGER_ATTRIBUTE = WebAsyncManager.class.getName() + ".WEB_ASYNC_MANAGER";
public static final String WEB_ASYNC_MANAGER_ATTRIBUTE =
WebAsyncManager.class.getName() + ".WEB_ASYNC_MANAGER";
/**
@ -40,7 +41,11 @@ public abstract class WebAsyncUtils {
* found, create and associate it with the request.
*/
public static WebAsyncManager getAsyncManager(ServletRequest servletRequest) {
WebAsyncManager asyncManager = (WebAsyncManager) servletRequest.getAttribute(WEB_ASYNC_MANAGER_ATTRIBUTE);
WebAsyncManager asyncManager = null;
Object asyncManagerAttr = servletRequest.getAttribute(WEB_ASYNC_MANAGER_ATTRIBUTE);
if (asyncManagerAttr instanceof WebAsyncManager) {
asyncManager = (WebAsyncManager) asyncManagerAttr;
}
if (asyncManager == null) {
asyncManager = new WebAsyncManager();
servletRequest.setAttribute(WEB_ASYNC_MANAGER_ATTRIBUTE, asyncManager);
@ -54,7 +59,11 @@ public abstract class WebAsyncUtils {
*/
public static WebAsyncManager getAsyncManager(WebRequest webRequest) {
int scope = RequestAttributes.SCOPE_REQUEST;
WebAsyncManager asyncManager = (WebAsyncManager) webRequest.getAttribute(WEB_ASYNC_MANAGER_ATTRIBUTE, scope);
WebAsyncManager asyncManager = null;
Object asyncManagerAttr = webRequest.getAttribute(WEB_ASYNC_MANAGER_ATTRIBUTE, scope);
if (asyncManagerAttr instanceof WebAsyncManager) {
asyncManager = (WebAsyncManager) asyncManagerAttr;
}
if (asyncManager == null) {
asyncManager = new WebAsyncManager();
webRequest.setAttribute(WEB_ASYNC_MANAGER_ATTRIBUTE, asyncManager, scope);