java.lang.Object
- org.springframework.web.servlet.resource.AbstractResourceResolver
- - org.springframework.web.servlet.resource.EncodedResourceResolver

All Implemented Interfaces:
ResourceResolver
```
public class EncodedResourceResolver
extends AbstractResourceResolver
```
Resolver that delegates to the chain, and if a resource is found, it then attempts to find an encoded (e.g. gzip, brotli) variant that is acceptable based on the "Accept-Encoding" request header.
The list of supported contentCodings can be configured, in order of preference, and each coding must be associated with extensions.
Note that this resolver must be ordered ahead of a VersionResourceResolver with a content-based, version strategy to ensure the version calculation is not impacted by the encoding.
Since:
5.1
Author:
Rossen Stoyanchev

Field Summary
Fields
Modifier and Type Field Description
static List<String> DEFAULT_CODINGS
The default content codings.
- Fields inherited from class org.springframework.web.servlet.resource.AbstractResourceResolver
  logger

Constructor Summary
Constructors
Constructor Description
EncodedResourceResolver()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`List<String>`	`getContentCodings()`	Return a read-only list with the supported content codings.
`Map<String,String>`	`getExtensions()`	Return a read-only map with coding-to-extension mappings.
`void`	`registerExtension(String coding, String extension)`	Java config friendly alternative to `setExtensions(Map)`.
`protected Resource`	`resolveResourceInternal(HttpServletRequest request, String requestPath, List<? extends Resource> locations, ResourceResolverChain chain)`
`protected String`	`resolveUrlPathInternal(String resourceUrlPath, List<? extends Resource> locations, ResourceResolverChain chain)`
`void`	`setContentCodings(List<String> codings)`	Configure the supported content codings in order of preference.
`void`	`setExtensions(Map<String,String> extensions)`	Configure mappings from content codings to file extensions.

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

- Field Detail
  - DEFAULT_CODINGS
```
public static final List<String> DEFAULT_CODINGS
```
    The default content codings.
- Constructor Detail
  - EncodedResourceResolver
```
public EncodedResourceResolver()
```
- Method Detail
  - setContentCodings
```
public void setContentCodings(List<String> codings)
```
    Configure the supported content codings in order of preference. The first coding that is present in the "Accept-Encoding" header for a given request, and that has a file present with the associated extension, is used.
    Note: Each coding must be associated with a file extension via registerExtension(java.lang.String, java.lang.String) or setExtensions(java.util.Map<java.lang.String, java.lang.String>). Also customizations to the list of codings here should be matched by customizations to the same list in CachingResourceResolver to ensure encoded variants of a resource are cached under separate keys.
    By default this property is set to ["br", "gzip"].
    Parameters:
    codings - one or more supported content codings
  - getContentCodings
```
public List<String> getContentCodings()
```
    Return a read-only list with the supported content codings.
  - setExtensions
```
public void setExtensions(Map<String,String> extensions)
```
    Configure mappings from content codings to file extensions. A dot "." will be prepended in front of the extension value if not present.
    By default this is configured with ["br" -> ".br"] and ["gzip" -> ".gz"].
    Parameters:
    extensions - the extensions to use.
    See Also:
    registerExtension(String, String)
  - getExtensions
```
public Map<String,String> getExtensions()
```
    Return a read-only map with coding-to-extension mappings.
  - registerExtension
```
public void registerExtension(String coding,
                              String extension)
```
    Java config friendly alternative to setExtensions(Map).
    Parameters:
    coding - the content coding
    extension - the associated file extension
  - resolveResourceInternal
```
protected Resource resolveResourceInternal(@Nullable
                                           HttpServletRequest request,
                                           String requestPath,
                                           List<? extends Resource> locations,
                                           ResourceResolverChain chain)
```
    Specified by:
    resolveResourceInternal in class AbstractResourceResolver
  - resolveUrlPathInternal
```
protected String resolveUrlPathInternal(String resourceUrlPath,
                                        List<? extends Resource> locations,
                                        ResourceResolverChain chain)
```
    Specified by:
    resolveUrlPathInternal in class AbstractResourceResolver

Class EncodedResourceResolver

Field Summary

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

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Object

Field Detail

DEFAULT_CODINGS

Constructor Detail

EncodedResourceResolver

Method Detail

setContentCodings

getContentCodings

setExtensions

getExtensions

registerExtension

resolveResourceInternal

resolveUrlPathInternal