问题描述
我将 Spring Boot 与基于标头的内容协商一起使用。 我有一组仅对一部分客户端可用的端点,其余的都是公共的。 我的公共端点注释如下:
@PostMapping(consumes = "application/vnd.com.foo+json",produces = "application/vnd.com.foo+json")
和我的私人像这样:
@PostMapping(consumes = "application/vnd.com.foo.private+json",produces = "application/vnd.com.foo.private+json")
我希望公共端点也使用和生成私有 mime 类型,以便我的私有客户端可以在他们的所有请求中设置该 mime 类型。显然,我可以通过在所有公共端点上明确指定它来做到这一点:
@PostMapping(consumes = {"application/vnd.com.foo+json","application/vnd.com.foo.private+json"},produces = {"application/vnd.com.foo+json","application/vnd.com.foo.private+json"})
但我想要一种更简洁的方法来做到这一点。
是否有某种方法可以配置 Spring 以将私有 mime 类型视为“扩展”公共 mime 类型?
解决方法
我可以在我的 WebMvcConfigurer bean 中配置内容协商:
@Override
public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
configurer.strategies(List.of(new HeaderContentNegotiationStrategy() {
@Override
public List<MediaType> resolveMediaTypes(NativeWebRequest request) throws HttpMediaTypeNotAcceptableException {
List<MediaType> mediaTypes = super.resolveMediaTypes(request);
List<MediaType> publicisedInternalMediaTypes = mediaTypes.stream()
.filter(m -> m.getSubtype().startsWith("vnd.com.foo.private"))
.map(m -> new MediaType(
m.getType(),m.getSubtype().replace("vnd.com.foo.private","vnd.com.foo"),m.getParameters()))
.collect(toList());
mediaTypes.addAll(publicisedInternalMediaTypes);
return mediaTypes;
}
}));
}
到目前为止,这似乎有效,但我很想看到一种更标准或更优雅的方式来实现这一目标。
编辑:这适用于 Accept 标头,但不适用于 Content-Type。
,在我的 DelegatingWebMvcConfiguration 中,我可以覆盖 createRequestMappingHandlerMapping() 以添加私有 consumes 和 produces 映射以添加公共映射。
@Override
protected RequestMappingInfo createRequestMappingInfo(
RequestMapping original,RequestCondition<?> customCondition) {
ExpandedRequestMapping expanded = expandRequestMapping(original);
return super.createRequestMappingInfo(expanded,customCondition);
}
/**
* If the produces or consume fields include a public media type,* add the corresponding private media type,too.
*/
private ExpandedRequestMapping expandRequestMapping(RequestMapping original) {
return new ExpandedRequestMapping(original);
}
private static String[] expandedMediaTypes(String[] originalArray) {
// If we ever have a controller method that produces or consumes multiple public types,// then we'll need to change this.
return Arrays.stream(originalArray)
.filter(mediaType -> mediaType.contains(VND_PUBLIC))
.findAny()
.map(publicMediaType -> publicMediaType.replace(VND_PUBLIC,VND_PRIVATE))
.map(privateMediaType -> ArrayUtils.addAll(originalArray,privateMediaType))
.orElse(originalArray);
}
static class ExpandedRequestMapping implements RequestMapping {
private final RequestMapping delegate;
private ExpandedRequestMapping(RequestMapping delegate) {
this.delegate = delegate;
}
@Override
public String[] consumes() {
return expandedMediaTypes(delegate.consumes());
}
@Override
public String[] produces() {
return expandedMediaTypes(delegate.produces());
}
// delegate other methods
}