org.springframework.web.servlet.resource

Class PathResourceResolver

java.lang.Object

org.springframework.web.servlet.resource.AbstractResourceResolver

org.springframework.web.servlet.resource.PathResourceResolver

All Implemented Interfaces:

ResourceResolver

public class PathResourceResolver
extends AbstractResourceResolver

A simple ResourceResolver that tries to find a resource under the given locations matching to the request path.

This resolver does not delegate to the ResourceResolverChain and is expected to be configured at the end in a chain of resolvers.

Since:

4.1

Author:

Jeremy Grelle, Rossen Stoyanchev, Sam Brannen

Field Summary

Fields inherited from class org.springframework.web.servlet.resource.AbstractResourceResolver

logger

Constructor Summary

Constructors

Constructor and Description
PathResourceResolver()

Method Summary

Modifier and Type	Method and Description
protected boolean	checkResource(Resource resource, Resource location) Perform additional checks on a resolved resource beyond checking whether the resources exists and is readable.
Resource[]	getAllowedLocations()
java.util.Map<Resource,java.nio.charset.Charset>	getLocationCharsets() Return charsets associated with static resource locations.
protected Resource	getResource(java.lang.String resourcePath, Resource location) Find the resource under the given location.
UrlPathHelper	getUrlPathHelper() The configured UrlPathHelper.
protected Resource	resolveResourceInternal(HttpServletRequest request, java.lang.String requestPath, java.util.List<? extends Resource> locations, ResourceResolverChain chain)
protected java.lang.String	resolveUrlPathInternal(java.lang.String resourcePath, java.util.List<? extends Resource> locations, ResourceResolverChain chain)
void	setAllowedLocations(Resource... locations) By default when a Resource is found, the path of the resolved resource is compared to ensure it's under the input location where it was found.
void	setLocationCharsets(java.util.Map<Resource,java.nio.charset.Charset> locationCharsets) Configure charsets associated with locations.
void	setUrlPathHelper(UrlPathHelper urlPathHelper) Provide a reference to the UrlPathHelper used to map requests to static resources.

Methods inherited from class org.springframework.web.servlet.resource.AbstractResourceResolver

resolveResource, resolveUrlPath

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PathResourceResolver

public PathResourceResolver()

Method Detail

setAllowedLocations

public void setAllowedLocations(@Nullable
                                Resource... locations)

By default when a Resource is found, the path of the resolved resource is compared to ensure it's under the input location where it was found. However sometimes that may not be the case, e.g. when CssLinkResourceTransformer resolves public URLs of links it contains, the CSS file is the location and the resources being resolved are css files, images, fonts and others located in adjacent or parent directories.

This property allows configuring a complete list of locations under which resources must be so that if a resource is not under the location relative to which it was found, this list may be checked as well.

By default ResourceHttpRequestHandler initializes this property to match its list of locations.

Parameters:

locations - the list of allowed locations

Since:

4.1.2

See Also:

ResourceHttpRequestHandler.initAllowedLocations()

getAllowedLocations

@Nullable
public Resource[] getAllowedLocations()

setLocationCharsets

public void setLocationCharsets(java.util.Map<Resource,java.nio.charset.Charset> locationCharsets)

Configure charsets associated with locations. If a static resource is found under a URL resource location the charset is used to encode the relative path

Note: the charset is used only if the urlPathHelper property is also configured and its urlDecode property is set to true.

Since:

4.3.13

getLocationCharsets

public java.util.Map<Resource,java.nio.charset.Charset> getLocationCharsets()

Return charsets associated with static resource locations.

Since:

4.3.13

setUrlPathHelper

public void setUrlPathHelper(@Nullable
                             UrlPathHelper urlPathHelper)

Provide a reference to the UrlPathHelper used to map requests to static resources. This helps to derive information about the lookup path such as whether it is decoded or not.

Since:

4.3.13

getUrlPathHelper

@Nullable
public UrlPathHelper getUrlPathHelper()

The configured UrlPathHelper.

Since:

4.3.13

resolveResourceInternal

protected Resource resolveResourceInternal(@Nullable
                                           HttpServletRequest request,
                                           java.lang.String requestPath,
                                           java.util.List<? extends Resource> locations,
                                           ResourceResolverChain chain)

Specified by:

resolveResourceInternal in class AbstractResourceResolver

resolveUrlPathInternal

protected java.lang.String resolveUrlPathInternal(java.lang.String resourcePath,
                                                  java.util.List<? extends Resource> locations,
                                                  ResourceResolverChain chain)

Specified by:

resolveUrlPathInternal in class AbstractResourceResolver

getResource

@Nullable
protected Resource getResource(java.lang.String resourcePath,
                                         Resource location)
                                  throws java.io.IOException

Find the resource under the given location.

The default implementation checks if there is a readable Resource for the given path relative to the location.

Parameters:

resourcePath - the path to the resource

location - the location to check

Returns:

the resource, or null if none found

Throws:

java.io.IOException

checkResource

protected boolean checkResource(Resource resource,
                                Resource location)
                         throws java.io.IOException

Perform additional checks on a resolved resource beyond checking whether the resources exists and is readable. The default implementation also verifies the resource is either under the location relative to which it was found or is under one of the allowed locations.

Parameters:

resource - the resource to check

location - the location relative to which the resource was found

Returns:

"true" if resource is in a valid location, "false" otherwise.

Throws:

java.io.IOException

Since:

4.1.2