Examples of org.springframework.web.servlet.resource.VersionResourceResolver

Package org.springframework.web.servlet.resource

Examples of org.springframework.web.servlet.resource.VersionResourceResolver

org.springframework.web.servlet.resource.VersionResourceResolver
Resolves request paths containing a version string that can be used as part of an HTTP caching strategy in which a resource is cached with a date in the distant future (e.g. 1 year) and cached until the version, and therefore the URL, is changed.
Different versioning strategies exist, and this resolver must be configured with one or more such strategies along with path mappings to indicate which strategy applies to which resources.
{@code ContentVersionStrategy} is a good default choice except in caseswhere it cannot be used. Most notably the {@code ContentVersionStrategy}cannot be combined with JavaScript module loaders. For such cases the {@code FixedVersionStrategy} is a better choice.
Note that using this resolver to serve CSS files means that the {@link CssLinkResourceTransformer} should also be used in order to modifylinks within CSS files to also contain the appropriate versions generated by this resolver. @author Brian Clozel @author Rossen Stoyanchev @since 4.1 @see VersionStrategy

    @Override
    public void addResourceHandlers(ResourceHandlerRegistry registry) {
        ResourceHandlerRegistration resourceHandlerRegistration = registry.addResourceHandler("/static/**");
        resourceHandlerRegistration.addResourceLocations("classpath:/");
        ResourceChainRegistration resourceChain = resourceHandlerRegistration.resourceChain(false);
        VersionResourceResolver versionResolver = new VersionResourceResolver().addContentVersionStrategy("/**");
        resourceChain.addResolver(versionResolver);


    }

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  public void addResourceHandlers ( ResourceHandlerRegistry registry )
  {
    ResourceHandlerRegistration resourceHandlerRegistration = registry.addResourceHandler("/**");
    resourceHandlerRegistration.addResourceLocations("/");
    ResourceChainRegistration resourceChain = resourceHandlerRegistration.resourceChain(false);
    VersionResourceResolver versionResolver = new VersionResourceResolver().addContentVersionStrategy("/**");
    resourceChain.addResolver(versionResolver);
  }

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    CachingResourceResolver cachingResolver = (CachingResourceResolver) resolvers.get(0);
    assertThat(cachingResolver.getCache(), Matchers.instanceOf(ConcurrentMapCache.class));
    assertEquals("test-resource-cache", cachingResolver.getCache().getName());


    VersionResourceResolver versionResolver = (VersionResourceResolver) resolvers.get(1);
    assertThat(versionResolver.getStrategyMap().get("/**/*.js"),
        Matchers.instanceOf(FixedVersionStrategy.class));
    assertThat(versionResolver.getStrategyMap().get("/**"),
        Matchers.instanceOf(ContentVersionStrategy.class));


    List<ResourceTransformer> transformers = handler.getResourceTransformers();
    assertThat(transformers, Matchers.hasSize(3));
    assertThat(transformers.get(0), Matchers.instanceOf(CachingResourceTransformer.class));

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    assertThat(resolvers, Matchers.hasSize(3));
    assertThat(resolvers.get(0), Matchers.instanceOf(VersionResourceResolver.class));
    assertThat(resolvers.get(1), Matchers.instanceOf(GzipResourceResolver.class));
    assertThat(resolvers.get(2), Matchers.instanceOf(PathResourceResolver.class));


    VersionResourceResolver versionResolver = (VersionResourceResolver) resolvers.get(0);
    assertThat(versionResolver.getStrategyMap().get("/**/*.js"),
        Matchers.instanceOf(FixedVersionStrategy.class));
    assertThat(versionResolver.getStrategyMap().get("/**"),
        Matchers.instanceOf(ContentVersionStrategy.class));


    List<ResourceTransformer> transformers = handler.getResourceTransformers();
    assertThat(transformers, Matchers.hasSize(2));
    assertThat(transformers.get(0), Matchers.instanceOf(CachingResourceTransformer.class));

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    assertThat(transformers, Matchers.hasSize(0));
  }


  @Test
  public void resourceChainWithVersionResolver() throws Exception {
    VersionResourceResolver versionResolver = new VersionResourceResolver()
        .addFixedVersionStrategy("fixed", "/**/*.js")
        .addContentVersionStrategy("/**");


    this.registration.resourceChain(true).addResolver(versionResolver)
        .addTransformer(new AppCacheManifestTransformer());

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  }


  @Test
  public void resourceChainWithOverrides() throws Exception {
    CachingResourceResolver cachingResolver = Mockito.mock(CachingResourceResolver.class);
    VersionResourceResolver versionResolver = Mockito.mock(VersionResourceResolver.class);
    PathResourceResolver pathResourceResolver = new PathResourceResolver();
    CachingResourceTransformer cachingTransformer = Mockito.mock(CachingResourceTransformer.class);
    AppCacheManifestTransformer appCacheTransformer = Mockito.mock(AppCacheManifestTransformer.class);
    CssLinkResourceTransformer cssLinkTransformer = new CssLinkResourceTransformer();

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