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SPR-6464 Add target request matching logic to DefaultFlashMapManager.

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This commit is contained in:
Rossen Stoyanchev
2011-08-29 08:37:43 +00:00
parent 71984b8038
commit 6a06a17c47
12 changed files with 463 additions and 368 deletions
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8
org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/DispatcherServlet.java
View File

@@ -53,7 +53,6 @@ import org.springframework.web.context.request.ServletWebRequest;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.MultipartResolver;
import org.springframework.web.servlet.support.RequestContextUtils;
import org.springframework.web.util.NestedServletException;
import org.springframework.web.util.UrlPathHelper;
import org.springframework.web.util.WebUtils;
@@ -815,7 +814,7 @@ public class DispatcherServlet extends FrameworkServlet {
}
}
boolean flashInitialized = this.flashMapManager.requestStarted(request);
this.flashMapManager.requestStarted(request);
// Make framework objects available to handlers and view objects.
request.setAttribute(WEB_APPLICATION_CONTEXT_ATTRIBUTE, getWebApplicationContext());
@@ -827,9 +826,8 @@ public class DispatcherServlet extends FrameworkServlet {
doDispatch(request, response);
}
finally {
if (flashInitialized) {
this.flashMapManager.requestCompleted(request);
}
this.flashMapManager.requestCompleted(request);
// Restore the original attribute snapshot, in case of an include.
if (attributesSnapshot != null) {
restoreAttributesAfterInclude(request, attributesSnapshot);

174
org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/FlashMap.java
View File

@@ -20,98 +20,90 @@ import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.BeanUtils;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import org.springframework.web.util.UrlPathHelper;
/**
* Stores attributes that need to be made available in the next request.
* A FlashMap provides a way for one request to store attributes intended for
* use in another. This is most commonly needed when redirecting from one URL
* to another -- e.g. the Post/Redirect/Get pattern. A FlashMap is saved before
* the redirect (typically in the session) and is made available after the
* redirect and removed immediately.
*
* <p>A FlashMap can be set up with a request path and request parameters to
* help identify the target request. Without this information, a FlashMap is
* made available to the next request, which may or may not be the intended
* result. Before a redirect, the target URL is known and when using the
* {@code org.springframework.web.servlet.view.RedirectView}, FlashMap
* instances are automatically updated with redirect URL information.
*
* <p>Annotated controllers will usually not access a FlashMap directly.. TODO
*
* @author Rossen Stoyanchev
* @since 3.1
*
* @see FlashMapManager
*/
public class FlashMap extends HashMap<String, Object> implements Comparable<FlashMap> {
private static final long serialVersionUID = 1L;
private String expectedRequestUri;
private String targetRequestPath;
private final Map<String, String> expectedRequestParameters = new LinkedHashMap<String, String>();
private final Map<String, String> targetRequestParams = new LinkedHashMap<String, String>();
private long expirationStartTime;
private int timeToLive;
private final UrlPathHelper urlPathHelper = new UrlPathHelper();
private final int createdBy;
/**
* Provide a URL to identify the target request for this FlashMap.
* Only the path of the provided URL will be used for matching purposes.
* If the URL is absolute or has a query string, the URL path is
* extracted. Or if the URL is relative, it is appended to the current
* request URI and normalized.
*
* @param request the current request, used to normalize relative URLs
* @param url an absolute URL, a URL path, or a relative URL, never {@code null}
* Create a new instance.
*/
public FlashMap setExpectedRequestUri(HttpServletRequest request, String url) {
Assert.notNull(url, "Expected URL must not be null");
String path = extractRequestUri(url);
this.expectedRequestUri = path.startsWith("/") ? path : normalizeRelativePath(request, path);
return this;
}
private String extractRequestUri(String url) {
int index = url.indexOf("?");
if (index != -1) {
url = url.substring(0, index);
}
index = url.indexOf("://");
if (index != -1) {
int pathBegin = url.indexOf("/", index + 3);
url = (pathBegin != -1 ) ? url.substring(pathBegin) : "";
}
return url;
}
private String normalizeRelativePath(HttpServletRequest request, String relativeUrl) {
String requestUri = this.urlPathHelper.getRequestUri(request);
relativeUrl = requestUri.substring(0, requestUri.lastIndexOf('/') + 1) + relativeUrl;
return StringUtils.cleanPath(relativeUrl);
public FlashMap() {
this.createdBy = 0;
}
/**
* Add a request parameter pair to help identify the request this FlashMap
* should be made available to. If expected parameters are not set, the
* FlashMap instance will match to requests with any parameters.
*
* @param name the name of the expected parameter (never {@code null})
* @param value the value for the expected parameter (never {@code null})
* Create a new instance with an id uniquely identifying the creator of
* this FlashMap.
*/
public FlashMap setExpectedRequestParam(String name, String value) {
this.expectedRequestParameters.put(name, value.toString());
return this;
public FlashMap(int createdBy) {
this.createdBy = createdBy;
}
/**
* Provide request parameter pairs to help identify the request this FlashMap
* should be made available to. If expected parameters are not set, the
* FlashMap instance will match to requests with any parameters.
*
* <p>Although the provided map contain any Object values, only non-"simple"
* value types as defined in {@link BeanUtils#isSimpleValueType} are used.
*
* Provide a URL path to help identify the target request for this FlashMap.
* The path may be absolute (e.g. /application/resource) or relative to the
* current request (e.g. ../resource).
* @param path the URI path, never {@code null}
*/
public void setTargetRequestPath(String path) {
Assert.notNull(path, "Expected path must not be null");
this.targetRequestPath = path;
}
/**
* Return the URL path of the target request, or {@code null} if none.
*/
public String getTargetRequestPath() {
return targetRequestPath;
}
/**
* Provide request parameter pairs to identify the request for this FlashMap.
* If not set, the FlashMap will match to requests with any parameters.
* Only simple value types, as defined in {@link BeanUtils#isSimpleValueType},
* are used.
* @param params a Map with the names and values of expected parameters.
*/
public FlashMap setExpectedRequestParams(Map<String, ?> params) {
public FlashMap addTargetRequestParams(Map<String, ?> params) {
if (params != null) {
for (String name : params.keySet()) {
Object value = params.get(name);
if ((value != null) && BeanUtils.isSimpleValueType(value.getClass())) {
this.expectedRequestParameters.put(name, value.toString());
this.targetRequestParams.put(name, value.toString());
}
}
}
@@ -119,37 +111,24 @@ public class FlashMap extends HashMap<String, Object> implements Comparable<Flas
}
/**
* Whether this FlashMap matches to the given request by checking
* expectations provided via {@link #setExpectedRequestUri} and
* {@link #setExpectedRequestParams}.
* Provide a request parameter to identify the request for this FlashMap.
* If not set, the FlashMap will match to requests with any parameters.
*
* @param request the current request
*
* @return "true" if the expectations match or there are no expectations.
* @param name the name of the expected parameter (never {@code null})
* @param value the value for the expected parameter (never {@code null})
*/
public boolean matches(HttpServletRequest request) {
if (this.expectedRequestUri != null) {
String requestUri = this.urlPathHelper.getRequestUri(request);
if (!matchPathsIgnoreTrailingSlash(requestUri, this.expectedRequestUri)) {
return false;
}
}
if (this.expectedRequestParameters != null) {
for (Map.Entry<String, String> entry : this.expectedRequestParameters.entrySet()) {
if (!entry.getValue().equals(request.getParameter(entry.getKey()))) {
return false;
}
}
}
return true;
public FlashMap addTargetRequestParam(String name, String value) {
this.targetRequestParams.put(name, value.toString());
return this;
}
private boolean matchPathsIgnoreTrailingSlash(String path1, String path2) {
path1 = path1.endsWith("/") ? path1.substring(0, path1.length() - 1) : path1;
path2 = path2.endsWith("/") ? path2.substring(0, path2.length() - 1) : path2;
return path1.equals(path2);
/**
* Return the parameters identifying the target request, or an empty Map.
*/
public Map<String, String> getTargetRequestParams() {
return targetRequestParams;
}
/**
* Start the expiration period for this instance. After the given number of
* seconds calls to {@link #isExpired()} will return "true".
@@ -174,21 +153,24 @@ public class FlashMap extends HashMap<String, Object> implements Comparable<Flas
}
/**
* Compare two FlashMap instances. One instance is preferred over the other
* if it has an expected URL path or if it has a greater number of expected
* request parameters.
*
* <p>It is expected that both instances have been matched against the
* current request via {@link FlashMap#matches}.
* Whether the given id matches the id of the creator of this FlashMap.
*/
public boolean isCreatedBy(int createdBy) {
return this.createdBy == createdBy;
}
/**
* Compare two FlashMaps and select the one that has a target URL path or
* has more target request parameters.
*/
public int compareTo(FlashMap other) {
int thisUrlPath = (this.expectedRequestUri != null) ? 1 : 0;
int otherUrlPath = (other.expectedRequestUri != null) ? 1 : 0;
int thisUrlPath = (this.targetRequestPath != null) ? 1 : 0;
int otherUrlPath = (other.targetRequestPath != null) ? 1 : 0;
if (thisUrlPath != otherUrlPath) {
return otherUrlPath - thisUrlPath;
}
else {
return other.expectedRequestParameters.size() - this.expectedRequestParameters.size();
return other.targetRequestParams.size() - this.targetRequestParams.size();
}
}
@@ -196,8 +178,8 @@ public class FlashMap extends HashMap<String, Object> implements Comparable<Flas
public String toString() {
StringBuilder result = new StringBuilder();
result.append("[Attributes=").append(super.toString());
result.append(", expecteRequestUri=").append(this.expectedRequestUri);
result.append(", expectedRequestParameters=" + this.expectedRequestParameters.toString()).append("]");
result.append(", expecteRequestUri=").append(this.targetRequestPath);
result.append(", expectedRequestParameters=" + this.targetRequestParams.toString()).append("]");
return result.toString();
}

61
org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/FlashMapManager.java
View File

@@ -16,18 +16,20 @@
package org.springframework.web.servlet;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import org.springframework.web.servlet.support.RequestContextUtils;
/**
* A strategy interface for maintaining {@link FlashMap} instances in some
* underlying storage until the next request.
* A strategy interface for storing and retrieving {@code FlashMap} instances.
* See {@link FlashMap} for a general overview of using flash attributes.
*
* <p>The most common use case for using flash storage is a redirect.
* For example creating a resource in a POST request and then redirecting
* to the page that shows the resource. Flash storage may be used to
* pass along a success message.
* <p>A FlashMapManager is invoked at the beginning and at the end of a request.
* For each request, it exposes an "input" FlashMap with attributes passed from
* a previous request (if any) and an "output" FlashMap with attributes to pass
* to a subsequent request. Both FlashMap instances are exposed via request
* attributes and can be accessed through methods in
* {@code org.springframework.web.servlet.support.RequestContextUtils}.
*
* @author Rossen Stoyanchev
* @since 3.1
@@ -37,41 +39,42 @@ import org.springframework.web.servlet.support.RequestContextUtils;
public interface FlashMapManager {
/**
* Request attribute holding the read-only Map with flash attributes saved
* during the previous request.
* @see RequestContextUtils#getInputFlashMap(HttpServletRequest)
* Name of request attribute that holds a read-only {@link Map} with
* "input" flash attributes from a previous request (if any).
* @see org.springframework.web.servlet.support.RequestContextUtils#getInputFlashMap(HttpServletRequest)
*/
public static final String INPUT_FLASH_MAP_ATTRIBUTE = FlashMapManager.class.getName() + ".INPUT_FLASH_MAP";
/**
* Request attribute holding the {@link FlashMap} to add attributes to during
* the current request.
* @see RequestContextUtils#getOutputFlashMap(HttpServletRequest)
* Name of request attribute that holds the "output" {@link FlashMap} with
* attributes to pass to a subsequent request.
* @see org.springframework.web.servlet.support.RequestContextUtils#getOutputFlashMap(HttpServletRequest)
*/
public static final String OUTPUT_FLASH_MAP_ATTRIBUTE = FlashMapManager.class.getName() + ".OUTPUT_FLASH_MAP";
/**
* Perform flash storage tasks at the start of a new request:
* <ul>
* <li>Create a FlashMap and make it available under the request attribute
* {@link #OUTPUT_FLASH_MAP_ATTRIBUTE}.
* <li>Locate the FlashMap saved during the previous request and make it
* available under the request attribute {@link #INPUT_FLASH_MAP_ATTRIBUTE}.
* Performs the following tasks unless the {@link #OUTPUT_FLASH_MAP_ATTRIBUTE}
* request attribute exists:
* <ol>
* <li>Find the "input" FlashMap from a previous request (if any), expose it
* under the request attribute {@link #INPUT_FLASH_MAP_ATTRIBUTE}, and
* remove it from underlying storage.
* <li>Create the "output" FlashMap where the current request can save
* flash attributes and expose it under the request attribute
* {@link #OUTPUT_FLASH_MAP_ATTRIBUTE}.
* <li>Remove expired FlashMap instances.
* </ul>
* <p>If the {@link #OUTPUT_FLASH_MAP_ATTRIBUTE} request attribute exists
* return "false" immediately.
* </ol>
*
* @param request the current request
* @return "true" if flash storage tasks were performed; "false" otherwise.
*/
boolean requestStarted(HttpServletRequest request);
void requestStarted(HttpServletRequest request);
/**
* Access the FlashMap with attributes added during the current request and
* if it is not empty, save it in the underlying storage.
* <p>If the call to {@link #requestStarted} returned "false", this
* method is not invoked.
* Save the "output" FlashMap in underlying storage, start its expiration
* period, and decode/normalize its target request path.
*
* <p>The "output" FlashMap is not saved if it is empty or if it was not
* created by this FlashMapManager.
*/
void requestCompleted(HttpServletRequest request);

4
org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/mvc/condition/ParamsRequestCondition.java
View File

@@ -54,8 +54,8 @@ public final class ParamsRequestCondition extends AbstractRequestCondition<Param
private static Collection<ParamExpression> parseExpressions(String... params) {
Set<ParamExpression> expressions = new LinkedHashSet<ParamExpression>();
if (params != null) {
for (String header : params) {
expressions.add(new ParamExpression(header));
for (String param : params) {
expressions.add(new ParamExpression(param));
}
}
return expressions;

185
org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/support/DefaultFlashMapManager.java
View File

@@ -28,12 +28,13 @@ import javax.servlet.http.HttpSession;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.util.CollectionUtils;
import org.springframework.util.StringUtils;
import org.springframework.web.servlet.FlashMap;
import org.springframework.web.servlet.FlashMapManager;
import org.springframework.web.util.UrlPathHelper;
/**
* A {@link FlashMapManager} that saves and retrieves FlashMap instances in the
* HTTP session.
* A {@link FlashMapManager} that stores FlashMap instances in the HTTP session.
*
* @author Rossen Stoyanchev
* @since 3.1
@@ -46,10 +47,11 @@ public class DefaultFlashMapManager implements FlashMapManager {
private int flashTimeout = 180;
private final UrlPathHelper urlPathHelper = new UrlPathHelper();
/**
* The amount of time in seconds after a request has completed processing
* and before a FlashMap is considered expired.
* The default value is 180.
* The amount of time in seconds after a FlashMap is saved (after request
* completion) before it is considered expired. The default value is 180.
*/
public void setFlashMapTimeout(int flashTimeout) {
this.flashTimeout = flashTimeout;
@@ -57,126 +59,153 @@ public class DefaultFlashMapManager implements FlashMapManager {
/**
* {@inheritDoc}
*
* <p>This method never creates an HTTP session. The new FlashMap created
* for the current request is exposed as a request attribute only and is
* not saved in the session until {@link #requestCompleted} is called.
* <p>This method never causes the HTTP session to be created.
*/
public boolean requestStarted(HttpServletRequest request) {
public void requestStarted(HttpServletRequest request) {
if (request.getAttribute(OUTPUT_FLASH_MAP_ATTRIBUTE) != null) {
return false;
return;
}
FlashMap outputFlashMap = new FlashMap();
request.setAttribute(OUTPUT_FLASH_MAP_ATTRIBUTE, outputFlashMap);
Map<String, ?> inputFlashMap = getFlashMap(request);
Map<String, ?> inputFlashMap = lookupFlashMap(request);
if (inputFlashMap != null) {
request.setAttribute(INPUT_FLASH_MAP_ATTRIBUTE, inputFlashMap);
}
FlashMap outputFlashMap = new FlashMap(this.hashCode());
request.setAttribute(OUTPUT_FLASH_MAP_ATTRIBUTE, outputFlashMap);
removeExpiredFlashMaps(request);
return true;
}
/**
* Return the flash attributes saved during the previous request if any.
*
* @return a read-only Map; or {@code null} if not found.
* Look up the "input" FlashMap by matching the target request path and
* the target request parameters configured in each available FlashMap
* to the current request.
*/
private Map<String, ?> getFlashMap(HttpServletRequest request) {
List<FlashMap> allMaps = retrieveFlashMaps(request, false);
if (CollectionUtils.isEmpty(allMaps)) {
private Map<String, ?> lookupFlashMap(HttpServletRequest request) {
List<FlashMap> allFlashMaps = retrieveFlashMaps(request, false);
if (CollectionUtils.isEmpty(allFlashMaps)) {
return null;
}
if (logger.isDebugEnabled()) {
logger.debug("Looking up previous FlashMap among available FlashMaps: " + allMaps);
logger.debug("Retrieved flash maps: " + allFlashMaps);
}
List<FlashMap> matches = new ArrayList<FlashMap>();
for (FlashMap flashMap : allMaps) {
if (flashMap.matches(request)) {
if (logger.isDebugEnabled()) {
logger.debug("Matched " + flashMap);
}
matches.add(flashMap);
List<FlashMap> result = new ArrayList<FlashMap>();
for (FlashMap flashMap : allFlashMaps) {
if (isFlashMapForRequest(flashMap, request)) {
result.add(flashMap);
}
}
if (!matches.isEmpty()) {
Collections.sort(matches);
FlashMap match = matches.remove(0);
allMaps.remove(match);
if (!result.isEmpty()) {
Collections.sort(result);
if (logger.isDebugEnabled()) {
logger.debug("Matching flash maps: " + result);
}
FlashMap match = result.remove(0);
allFlashMaps.remove(match);
return Collections.unmodifiableMap(match);
}
return null;
}
/**
* Retrieve the list of all FlashMap instances from the HTTP session.
* Compares the target request path and the target request parameters in the
* given FlashMap and returns "true" if they match. If the FlashMap does not
* have target request information, it matches any request.
*/
protected boolean isFlashMapForRequest(FlashMap flashMap, HttpServletRequest request) {
if (flashMap.getTargetRequestPath() != null) {
String requestUri = this.urlPathHelper.getRequestUri(request);
if (!requestUri.equals(flashMap.getTargetRequestPath())
&& !requestUri.equals(flashMap.getTargetRequestPath() + "/")) {
return false;
}
}
if (flashMap.getTargetRequestParams() != null) {
for (Map.Entry<String, String> entry : flashMap.getTargetRequestParams().entrySet()) {
if (!entry.getValue().equals(request.getParameter(entry.getKey()))) {
return false;
}
}
}
return true;
}
/**
* Retrieve all available FlashMap instances from the HTTP session.
* @param request the current request
* @param allowCreate whether to create and the FlashMap container if not found
* @return a Map with all stored FlashMap instances; or {@code null}
* @param allowCreate whether to create and save the FlashMap in the session
* @return a Map with all FlashMap instances; or {@code null}
*/
@SuppressWarnings("unchecked")
private List<FlashMap> retrieveFlashMaps(HttpServletRequest request, boolean allowCreate) {
protected List<FlashMap> retrieveFlashMaps(HttpServletRequest request, boolean allowCreate) {
HttpSession session = request.getSession(allowCreate);
if (session == null) {
return null;
}
List<FlashMap> allMaps = (List<FlashMap>) session.getAttribute(FLASH_MAPS_SESSION_ATTRIBUTE);
if (allMaps == null && allowCreate) {
synchronized (DefaultFlashMapManager.class) {
allMaps = (List<FlashMap>) session.getAttribute(FLASH_MAPS_SESSION_ATTRIBUTE);
if (allMaps == null) {
allMaps = new CopyOnWriteArrayList<FlashMap>();
session.setAttribute(FLASH_MAPS_SESSION_ATTRIBUTE, allMaps);
}
List<FlashMap> allFlashMaps = (List<FlashMap>) session.getAttribute(FLASH_MAPS_SESSION_ATTRIBUTE);
if (allFlashMaps == null && allowCreate) {
synchronized (this) {
allFlashMaps = (List<FlashMap>) session.getAttribute(FLASH_MAPS_SESSION_ATTRIBUTE);
if (allFlashMaps == null) {
allFlashMaps = new CopyOnWriteArrayList<FlashMap>();
session.setAttribute(FLASH_MAPS_SESSION_ATTRIBUTE, allFlashMaps);
}
}
}
return allMaps;
}
private void removeExpiredFlashMaps(HttpServletRequest request) {
List<FlashMap> allMaps = retrieveFlashMaps(request, false);
if (allMaps != null && !allMaps.isEmpty()) {
List<FlashMap> expiredMaps = new ArrayList<FlashMap>();
for (FlashMap flashMap : allMaps) {
if (flashMap.isExpired()) {
if (logger.isDebugEnabled()) {
logger.debug("Removing expired FlashMap: " + flashMap);
}
expiredMaps.add(flashMap);
}
}
allMaps.removeAll(expiredMaps);
}
return allFlashMaps;
}
/**
* {@inheritDoc}
*
* <p>The HTTP session is not created if the current FlashMap instance is empty.
* Iterate available FlashMap instances and remove the ones that have expired.
*/
private void removeExpiredFlashMaps(HttpServletRequest request) {
List<FlashMap> allMaps = retrieveFlashMaps(request, false);
if (CollectionUtils.isEmpty(allMaps)) {
return;
}
List<FlashMap> expiredMaps = new ArrayList<FlashMap>();
for (FlashMap flashMap : allMaps) {
if (flashMap.isExpired()) {
if (logger.isDebugEnabled()) {
logger.debug("Removing expired FlashMap: " + flashMap);
}
expiredMaps.add(flashMap);
}
}
allMaps.removeAll(expiredMaps);
}
public void requestCompleted(HttpServletRequest request) {
FlashMap flashMap = (FlashMap) request.getAttribute(OUTPUT_FLASH_MAP_ATTRIBUTE);
if (flashMap == null) {
throw new IllegalStateException(
"Did not find a FlashMap exposed as the request attribute " + OUTPUT_FLASH_MAP_ATTRIBUTE);
}
if (!flashMap.isEmpty()) {
if (!flashMap.isEmpty() && flashMap.isCreatedBy(this.hashCode())) {
if (logger.isDebugEnabled()) {
logger.debug("Saving FlashMap=" + flashMap);
}
List<FlashMap> allFlashMaps = retrieveFlashMaps(request, true);
decodeAndNormalizeTargetPath(flashMap, request);
flashMap.startExpirationPeriod(this.flashTimeout);
allFlashMaps.add(flashMap);
retrieveFlashMaps(request, true).add(flashMap);
}
}
/**
* Ensure the target request path in the given FlashMap is decoded and also
* normalized (if it is relative) against the current request URL.
*/
private void decodeAndNormalizeTargetPath(FlashMap flashMap, HttpServletRequest request) {
String path = flashMap.getTargetRequestPath();
if (path != null) {
path = urlPathHelper.decodeRequestString(request, path);
if (path.charAt(0) != '/') {
String requestUri = this.urlPathHelper.getRequestUri(request);
path = requestUri.substring(0, requestUri.lastIndexOf('/') + 1) + path;
path = StringUtils.cleanPath(path);
}
flashMap.setTargetRequestPath(path);
}
}

24
org.springframework.web.servlet/src/main/java/org/springframework/web/servlet/view/RedirectView.java
View File

@@ -38,6 +38,7 @@ 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.servlet.FlashMap;
import org.springframework.web.servlet.HandlerMapping;
import org.springframework.web.servlet.SmartView;
@@ -261,24 +262,27 @@ public class RedirectView extends AbstractUrlBasedView implements SmartView {
enc = WebUtils.DEFAULT_CHARACTER_ENCODING;
}
UriTemplate uriTemplate = createUriTemplate(targetUrl, enc);
if (uriTemplate.getVariableNames().size() > 0) {
Map<String, Object> vars = new HashMap<String, Object>();
vars.putAll(getCurrentUriVars(request));
vars.putAll(model);
targetUrl = new StringBuilder(uriTemplate.expand(vars).toString());
model = removeKeys(model, uriTemplate.getVariableNames());
if (StringUtils.hasText(targetUrl)) {
UriTemplate uriTemplate = createUriTemplate(targetUrl, enc);
if (uriTemplate.getVariableNames().size() > 0) {
Map<String, Object> vars = new HashMap<String, Object>();
vars.putAll(getCurrentUriVars(request));
vars.putAll(model);
targetUrl = new StringBuilder(uriTemplate.expand(vars).toString());
model = removeKeys(model, uriTemplate.getVariableNames());
}
}
FlashMap flashMap = RequestContextUtils.getOutputFlashMap(request);
if (!CollectionUtils.isEmpty(flashMap)) {
flashMap.setExpectedRequestUri(request, targetUrl.toString());
String targetPath = WebUtils.extractUrlPath(targetUrl.toString());
flashMap.setTargetRequestPath(targetPath);
}
if (this.exposeModelAttributes) {
appendQueryProperties(targetUrl, model, enc);
if (!CollectionUtils.isEmpty(flashMap)) {
flashMap.setExpectedRequestParams(model);
flashMap.addTargetRequestParams(model);
}
}