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Support flash attributes on ResponseEntity redirect

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Issue: SPR-15176
This commit is contained in:
Rossen Stoyanchev
2017-02-21 14:27:27 -05:00
parent ba97432043
commit 5ea5f81c00
4 changed files with 115 additions and 35 deletions
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28
spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/annotation/HttpEntityMethodProcessor.java
View File

@@ -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.
@@ -23,6 +23,8 @@ import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.core.MethodParameter;
import org.springframework.core.ResolvableType;
@@ -34,7 +36,9 @@ import org.springframework.http.ResponseEntity;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServletServerHttpRequest;
import org.springframework.http.server.ServletServerHttpResponse;
import org.springframework.ui.ModelMap;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.HttpMediaTypeNotSupportedException;
import org.springframework.web.accept.ContentNegotiationManager;
@@ -42,6 +46,8 @@ import org.springframework.web.bind.support.WebDataBinderFactory;
import org.springframework.web.context.request.NativeWebRequest;
import org.springframework.web.context.request.ServletWebRequest;
import org.springframework.web.method.support.ModelAndViewContainer;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import org.springframework.web.servlet.support.RequestContextUtils;
/**
* Resolves {@link HttpEntity} and {@link RequestEntity} method argument values
@@ -197,6 +203,12 @@ public class HttpEntityMethodProcessor extends AbstractMessageConverterMethodPro
return;
}
}
else if (returnStatus / 100 == 3) {
String location = outputHeaders.getFirst("location");
if (location != null) {
saveFlashAttributes(mavContainer, webRequest, location);
}
}
}
// Try even with null body. ResponseBodyAdvice could get involved.
@@ -241,6 +253,20 @@ public class HttpEntityMethodProcessor extends AbstractMessageConverterMethodPro
return servletWebRequest.checkNotModified(etag, lastModifiedTimestamp);
}
private void saveFlashAttributes(ModelAndViewContainer mav, NativeWebRequest request, String location) {
mav.setRedirectModelScenario(true);
ModelMap model = mav.getModel();
if (model instanceof RedirectAttributes) {
Map<String, ?> flashAttributes = ((RedirectAttributes) model).getFlashAttributes();
if (!CollectionUtils.isEmpty(flashAttributes)) {
HttpServletRequest req = request.getNativeRequest(HttpServletRequest.class);
HttpServletResponse res = request.getNativeRequest(HttpServletResponse.class);
RequestContextUtils.getOutputFlashMap(req).putAll(flashAttributes);
RequestContextUtils.saveOutputFlashMap(location, req, res);
}
}
}
@Override
protected Class<?> getReturnValueType(Object returnValue, MethodParameter returnType) {
if (returnValue != null) {

55
spring-webmvc/src/main/java/org/springframework/web/servlet/support/RequestContextUtils.java
View File

@@ -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.
@@ -22,11 +22,14 @@ import java.util.TimeZone;
import javax.servlet.ServletContext;
import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.context.i18n.LocaleContext;
import org.springframework.context.i18n.TimeZoneAwareLocaleContext;
import org.springframework.ui.context.Theme;
import org.springframework.ui.context.ThemeSource;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
import org.springframework.web.context.ContextLoader;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
@@ -36,6 +39,8 @@ import org.springframework.web.servlet.FlashMapManager;
import org.springframework.web.servlet.LocaleContextResolver;
import org.springframework.web.servlet.LocaleResolver;
import org.springframework.web.servlet.ThemeResolver;
import org.springframework.web.util.UriComponents;
import org.springframework.web.util.UriComponentsBuilder;
/**
* Utility class for easy access to request-specific state which has been
@@ -209,9 +214,8 @@ public abstract class RequestContextUtils {
}
/**
* Return a read-only {@link Map} with "input" flash attributes saved on a
* previous request.
* @param request the current request
* Return read-only "input" flash attributes from request before redirect.
* @param request current request
* @return a read-only Map, or {@code null} if not found
* @see FlashMap
*/
@@ -221,23 +225,52 @@ public abstract class RequestContextUtils {
}
/**
* Return the "output" FlashMap with attributes to save for a subsequent request.
* @param request the current request
* @return a {@link FlashMap} instance (never {@code null} within a DispatcherServlet request)
* @see FlashMap
* Return "output" FlashMap to save attributes for request after redirect.
* @param request current request
* @return a {@link FlashMap} instance, never {@code null} within a
* {@code DispatcherServlet}-handled request
*/
public static FlashMap getOutputFlashMap(HttpServletRequest request) {
return (FlashMap) request.getAttribute(DispatcherServlet.OUTPUT_FLASH_MAP_ATTRIBUTE);
}
/**
* Return the FlashMapManager instance to save flash attributes with
* before a redirect.
* Return the {@code FlashMapManager} instance to save flash attributes.
* <p>As of 5.0 the convenience method {@link #saveOutputFlashMap} may be
* used to save the "output" FlashMap.
* @param request the current request
* @return a {@link FlashMapManager} instance (never {@code null} within a DispatcherServlet request)
* @return a {@link FlashMapManager} instance, never {@code null} within a
* {@code DispatcherServlet}-handled request
*/
public static FlashMapManager getFlashMapManager(HttpServletRequest request) {
return (FlashMapManager) request.getAttribute(DispatcherServlet.FLASH_MAP_MANAGER_ATTRIBUTE);
}
/**
* Convenience method that retrieves the {@link #getOutputFlashMap "output"
* FlashMap}, updates it with the path and query params of the target URL,
* and then saves it using the {@link #getFlashMapManager FlashMapManager}.
*
* @param location the target URL for the redirect
* @param request the current request
* @param response the current response
* @since 5.0
*/
public static void saveOutputFlashMap(String location, HttpServletRequest request,
HttpServletResponse response) {
FlashMap flashMap = getOutputFlashMap(request);
if (CollectionUtils.isEmpty(flashMap)) {
return;
}
UriComponents uriComponents = UriComponentsBuilder.fromUriString(location).build();
flashMap.setTargetRequestPath(uriComponents.getPath());
flashMap.addTargetRequestParams(uriComponents.getQueryParams());
FlashMapManager manager = getFlashMapManager(request);
Assert.state(manager != null, "No FlashMapManager. Is this a DispatcherServlet handled request?");
manager.saveOutputFlashMap(flashMap, request, response);
}
}

18
spring-webmvc/src/main/java/org/springframework/web/servlet/view/RedirectView.java
View File

@@ -33,18 +33,14 @@ import javax.servlet.http.HttpServletResponse;
import org.springframework.beans.BeanUtils;
import org.springframework.http.HttpStatus;
import org.springframework.util.CollectionUtils;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.servlet.FlashMap;
import org.springframework.web.servlet.FlashMapManager;
import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.servlet.SmartView;
import org.springframework.web.servlet.View;
import org.springframework.web.servlet.support.RequestContextUtils;
import org.springframework.web.servlet.support.RequestDataValueProcessor;
import org.springframework.web.util.UriComponents;
import org.springframework.web.util.UriComponentsBuilder;
import org.springframework.web.util.UriUtils;
import org.springframework.web.util.WebUtils;
@@ -305,18 +301,10 @@ public class RedirectView extends AbstractUrlBasedView implements SmartView {
String targetUrl = createTargetUrl(model, request);
targetUrl = updateTargetUrl(targetUrl, model, request, response);
FlashMap flashMap = RequestContextUtils.getOutputFlashMap(request);
if (!CollectionUtils.isEmpty(flashMap)) {
UriComponents uriComponents = UriComponentsBuilder.fromUriString(targetUrl).build();
flashMap.setTargetRequestPath(uriComponents.getPath());
flashMap.addTargetRequestParams(uriComponents.getQueryParams());
FlashMapManager flashMapManager = RequestContextUtils.getFlashMapManager(request);
if (flashMapManager == null) {
throw new IllegalStateException("FlashMapManager not found despite output FlashMap having been set");
}
flashMapManager.saveOutputFlashMap(flashMap, request, response);
}
// Save flash attributes
RequestContextUtils.saveOutputFlashMap(targetUrl, request, response);
// Redirect
sendRedirect(request, response, targetUrl, this.http10Compatible);
}