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Clarify WebContentInterceptor path mappings and efficiently match them 

Issue: SPR-15096
(cherry picked from commit 801b93a)
This commit is contained in:
Juergen Hoeller 2017-01-17 21:12:54 +01:00
parent 99dc96b1a4
commit af7289d6e9
1 changed files with 25 additions and 18 deletions
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43
spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/WebContentInterceptor.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.
@ -20,15 +20,14 @@ import java.util.Enumeration;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.http.CacheControl;
import org.springframework.util.AntPathMatcher;
import org.springframework.util.Assert;
import org.springframework.util.PathMatcher;
import org.springframework.http.CacheControl;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.support.WebContentGenerator;
@ -115,6 +114,9 @@ public class WebContentInterceptor extends WebContentGenerator implements Handle
* <p>Supports direct matches, e.g. a registered "/test" matches "/test",
* and a various Ant-style pattern matches, e.g. a registered "/t*" matches
* both "/test" and "/team". For details, see the AntPathMatcher javadoc.
* <p><b>NOTE:</b> Path patterns are not supposed to overlap. If a request
* matches several mappings, it is effectively undefined which one will apply
* (due to the lack of key ordering in {@code java.util.Properties}).
* @param cacheMappings a mapping between URL paths (as keys) and
* cache seconds (as values, need to be integer-parsable)
* @see #setCacheSeconds
@ -138,11 +140,14 @@ public class WebContentInterceptor extends WebContentGenerator implements Handle
* <p>Supports direct matches, e.g. a registered "/test" matches "/test",
* and a various Ant-style pattern matches, e.g. a registered "/t*" matches
* both "/test" and "/team". For details, see the AntPathMatcher javadoc.
* <p><b>NOTE:</b> Path patterns are not supposed to overlap. If a request
* matches several mappings, it is effectively undefined which one will apply
* (due to the lack of key ordering in the underlying {@code java.util.HashMap}).
* @param cacheControl the {@code CacheControl} to use
* @param paths URL paths that will map to the given {@code CacheControl}
* @since 4.2
* @see #setCacheSeconds
* @see org.springframework.util.AntPathMatcher
* @since 4.2
*/
public void addCacheMapping(CacheControl cacheControl, String... paths) {
for (String path : paths) {
@ -211,15 +216,16 @@ public class WebContentInterceptor extends WebContentGenerator implements Handle
protected CacheControl lookupCacheControl(String urlPath) {
// Direct match?
CacheControl cacheControl = this.cacheControlMappings.get(urlPath);
if (cacheControl == null) {
// Pattern match?
for (String registeredPath : this.cacheControlMappings.keySet()) {
if (this.pathMatcher.match(registeredPath, urlPath)) {
cacheControl = this.cacheControlMappings.get(registeredPath);
}
if (cacheControl != null) {
return cacheControl;
}
// Pattern match?
for (String registeredPath : this.cacheControlMappings.keySet()) {
if (this.pathMatcher.match(registeredPath, urlPath)) {
return this.cacheControlMappings.get(registeredPath);
}
}
return cacheControl;
return null;
}
/**
@ -234,15 +240,16 @@ public class WebContentInterceptor extends WebContentGenerator implements Handle
protected Integer lookupCacheSeconds(String urlPath) {
// Direct match?
Integer cacheSeconds = this.cacheMappings.get(urlPath);
if (cacheSeconds == null) {
// Pattern match?
for (String registeredPath : this.cacheMappings.keySet()) {
if (this.pathMatcher.match(registeredPath, urlPath)) {
cacheSeconds = this.cacheMappings.get(registeredPath);
}
if (cacheSeconds != null) {
return cacheSeconds;
}
// Pattern match?
for (String registeredPath : this.cacheMappings.keySet()) {
if (this.pathMatcher.match(registeredPath, urlPath)) {
return this.cacheMappings.get(registeredPath);
}
}
return cacheSeconds;
return null;
}