Class LitewebJarsResourceResolver

java.lang.Object

org.springframework.web.servlet.resource.AbstractResourceResolver

org.springframework.web.servlet.resource.LitewebJarsResourceResolver

All Implemented Interfaces:

ResourceResolver

public class LitewebJarsResourceResolver
extends AbstractResourceResolver

A ResourceResolver that delegates to the chain to locate a resource and then attempts to find a matching versioned resource contained in a webJar JAR file.

This allows webJars.org users to write version agnostic paths in their templates, like <script src="/webjars/jquery/jquery.min.js"/>. This path will be resolved to the unique version <script src="/webjars/jquery/1.2.0/jquery.min.js"/>, which is a better fit for HTTP caching and version management in applications.

This also resolves resources for version agnostic HTTP requests "GET /jquery/jquery.min.js".

This resolver requires the org.webjars:webjars-locator-lite library on the classpath and is automatically registered if that library is present.

Since:

6.2

Author:

Sebastien Deleuze

See Also:

• ResourceChainRegistration
• webjars.org

Field Summary

Fields inherited from class AbstractResourceResolver

logger

Constructor Summary

Constructors

Constructor	Description
LitewebJarsResourceResolver()	Create a LitewebJarsResourceResolver with a default webJarVersionLocator instance.
LitewebJarsResourceResolver(org.webjars.webJarVersionLocator webJarVersionLocator)	Create a LitewebJarsResourceResolver with a custom webJarVersionLocator instance, for example, with a custom cache implementation.

Method Summary

Modifier and Type	Method	Description
protected @Nullable String	findwebJarResourcePath(String path)
protected @Nullable Resource	resolveResourceInternal(@Nullable jakarta.servlet.http.HttpServletRequest request, String requestPath, List<? extends Resource> locations, ResourceResolverChain chain)
protected @Nullable String	resolveUrlPathInternal(String resourceUrlPath, List<? extends Resource> locations, ResourceResolverChain chain)

Methods inherited from class AbstractResourceResolver

resolveResource, resolveUrlPath

Methods inherited from class Object

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

Constructor Details

LitewebJarsResourceResolver

public LitewebJarsResourceResolver()

Create a LitewebJarsResourceResolver with a default webJarVersionLocator instance.

LitewebJarsResourceResolver

public LitewebJarsResourceResolver(org.webjars.webJarVersionLocator webJarVersionLocator)

Create a LitewebJarsResourceResolver with a custom webJarVersionLocator instance, for example, with a custom cache implementation.

Method Details

resolveResourceInternal

protected @Nullable Resource resolveResourceInternal(@Nullable jakarta.servlet.http.HttpServletRequest request,
 String requestPath,
 List<? extends Resource> locations,
 ResourceResolverChain chain)

Specified by:

resolveResourceInternal in class AbstractResourceResolver

resolveUrlPathInternal

protected @Nullable String resolveUrlPathInternal(String resourceUrlPath,
 List<? extends Resource> locations,
 ResourceResolverChain chain)

Specified by:

resolveUrlPathInternal in class AbstractResourceResolver

findwebJarResourcePath

protected @Nullable String findwebJarResourcePath(String path)