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  3. [spring-projects/spring-boot]记录将 spring.hateoas.use-hal-as-default-json-media-type 设置为 fal...

[spring-projects/spring-boot]记录将 spring.hateoas.use-hal-as-default-json-media-type 设置为 false 后所需的其他用户配置

2024-07-08 568 views
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从 Spring Boot 2.5.0-M3 开始，application/hal+json即使请求包含 ，Spring HATEOAS 也会发送响应Accept: application/json。此更改是在提交 5863edfdda1b572c8e5e25ae20792898cca79f21 中引入的，被视为重大更改，未在 2.5 的发行说明中记录。此更改导致“链接”（现在呈现为对象_links，以前为数组links）和集合（现在呈现为对象_embedded，以前为数组content）的呈现方式不同。

设置spring.hateoas.use-hal-as-default-json-media-type为false将导致以下内部服务器错误。

org.springframework.http.converter.HttpMessageNotWritableException: No Encoder for [foo.model.EmptyResponse] with preset Content-Type 'null'
    at org.springframework.web.reactive.result.method.annotation.AbstractMessageWriterResultHandler.writeBody(AbstractMessageWriterResultHandler.java:181) ~[spring-webflux-5.3.7.jar:5.3.7]
    Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):
    |_ checkpoint ? Handler foo.controller.FooController#change(List, Long) [DispatcherHandler]
    |_ checkpoint ? org.springframework.security.web.server.authentication.AuthenticationWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.web.filter.reactive.ServerWebExchangeContextFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.security.web.server.authorization.AuthorizationWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.security.web.server.authorization.ExceptionTranslationWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.security.web.server.authentication.logout.LogoutWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.security.web.server.savedrequest.ServerRequestCacheWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.security.web.server.context.SecurityContextServerWebExchangeWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? foo.auth.JwtAuthFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.security.web.server.authentication.AuthenticationWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.security.web.server.context.ReactorContextWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.web.cors.reactive.CorsWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.security.web.server.header.HttpHeaderWriterWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.security.config.web.server.ServerHttpSecurity$ServerWebExchangeReactorContextWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.security.web.server.WebFilterChainProxy [DefaultWebFilterChain]
    |_ checkpoint ? org.springframework.boot.actuate.metrics.web.reactive.server.MetricsWebFilter [DefaultWebFilterChain]
    |_ checkpoint ? HTTP POST "/vertragsliste" [ExceptionHandlingWebHandler]
Stack trace:
        at org.springframework.web.reactive.result.method.annotation.AbstractMessageWriterResultHandler.writeBody(AbstractMessageWriterResultHandler.java:181) ~[spring-webflux-5.3.7.jar:5.3.7]
        at org.springframework.web.reactive.result.method.annotation.AbstractMessageWriterResultHandler.writeBody(AbstractMessageWriterResultHandler.java:105) ~[spring-webflux-5.3.7.jar:5.3.7]
        at org.springframework.web.reactive.result.method.annotation.ResponseBodyResultHandler.handleResult(ResponseBodyResultHandler.java:86) ~[spring-webflux-5.3.7.jar:5.3.7]
        at org.springframework.web.reactive.DispatcherHandler.handleResult(DispatcherHandler.java:179) ~[spring-webflux-5.3.7.jar:5.3.7]
        at org.springframework.web.reactive.DispatcherHandler.lambda$handle$2(DispatcherHandler.java:154) ~[spring-webflux-5.3.7.jar:5.3.7]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:125) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:249) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxOnErrorResume$ResumeSubscriber.onNext(FluxOnErrorResume.java:79) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:199) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:199) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.complete(MonoIgnoreThen.java:284) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onNext(MonoIgnoreThen.java:187) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:151) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoZip$ZipCoordinator.signal(MonoZip.java:251) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoZip$ZipInner.onNext(MonoZip.java:336) ~[reactor-core-3.4.6.jar:3.4.6]
        at org.springframework.security.test.context.support.ReactorContextTestExecutionListener$DelegateTestExecutionListener$SecuritySubContext.onNext(ReactorContextTestExecutionListener.java:120) ~[spring-security-test-5.5.0.jar:5.5.0]
        at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onNext(MonoPeekTerminal.java:180) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:100) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:151) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:127) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:151) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:118) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:191) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:110) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:87) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoCurrentContext.subscribe(MonoCurrentContext.java:36) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoZip.subscribe(MonoZip.java:128) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:236) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.onComplete(MonoIgnoreThen.java:203) ~[reactor-core-3.4.6.jar:3.4.6]
        at org.springframework.security.test.context.support.ReactorContextTestExecutionListener$DelegateTestExecutionListener$SecuritySubContext.onComplete(ReactorContextTestExecutionListener.java:130) ~[spring-security-test-5.5.0.jar:5.5.0]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onComplete(MonoFlatMap.java:181) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators.complete(Operators.java:136) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoZip.subscribe(MonoZip.java:120) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:255) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:157) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:82) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:281) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:860) ~[reactor-core-3.4.6.jar:3.4.6]
        at org.springframework.security.test.context.support.ReactorContextTestExecutionListener$DelegateTestExecutionListener$SecuritySubContext.onNext(ReactorContextTestExecutionListener.java:120) ~[spring-security-test-5.5.0.jar:5.5.0]
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:127) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onNext(MonoPeekTerminal.java:180) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.request(MonoPeekTerminal.java:139) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:169) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2193) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2067) ~[reactor-core-3.4.6.jar:3.4.6]
        at org.springframework.security.test.context.support.ReactorContextTestExecutionListener$DelegateTestExecutionListener$SecuritySubContext.onSubscribe(ReactorContextTestExecutionListener.java:115) ~[spring-security-test-5.5.0.jar:5.5.0]
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:96) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onSubscribe(MonoPeekTerminal.java:152) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:448) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:218) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:164) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:255) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:81) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onComplete(MonoFlatMap.java:181) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onComplete(FluxFilterFuseable.java:171) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxPeekFuseable$PeekFuseableConditionalSubscriber.onComplete(FluxPeekFuseable.java:595) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2399) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxPeekFuseable$PeekFuseableConditionalSubscriber.request(FluxPeekFuseable.java:437) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:191) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:110) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:87) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxPeekFuseable$PeekFuseableConditionalSubscriber.onSubscribe(FluxPeekFuseable.java:471) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:81) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onComplete(MonoPeekTerminal.java:299) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoPeekTerminal$MonoTerminalPeekSubscriber.onComplete(MonoPeekTerminal.java:299) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:148) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilter$FilterSubscriber.onNext(FluxFilter.java:113) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:100) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:82) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.innerNext(FluxConcatMap.java:281) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxConcatMap$ConcatMapInner.onNext(FluxConcatMap.java:860) ~[reactor-core-3.4.6.jar:3.4.6]
        at org.springframework.security.test.context.support.ReactorContextTestExecutionListener$DelegateTestExecutionListener$SecuritySubContext.onNext(ReactorContextTestExecutionListener.java:120) ~[spring-security-test-5.5.0.jar:5.5.0]
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:249) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onNext(FluxDefaultIfEmpty.java:100) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:127) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:118) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onNext(FluxMapFuseable.java:295) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableConditionalSubscriber.onNext(FluxFilterFuseable.java:337) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:151) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:118) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:191) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:110) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:87) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoCurrentContext.subscribe(MonoCurrentContext.java:36) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:157) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:127) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:118) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2397) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:191) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:169) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:110) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:96) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:87) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.drain(FluxConcatMap.java:448) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxConcatMap$ConcatMapImmediate.onSubscribe(FluxConcatMap.java:218) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:164) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.subscribeNext(MonoIgnoreThen.java:255) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:51) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:81) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:166) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxPeekFuseable$PeekConditionalSubscriber.onComplete(FluxPeekFuseable.java:940) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:84) ~[reactor-core-3.4.6.jar:3.4.6]
        at org.springframework.security.test.context.support.ReactorContextTestExecutionListener$DelegateTestExecutionListener$SecuritySubContext.onComplete(ReactorContextTestExecutionListener.java:130) ~[spring-security-test-5.5.0.jar:5.5.0]
        at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2399) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2193) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:2067) ~[reactor-core-3.4.6.jar:3.4.6]
        at org.springframework.security.test.context.support.ReactorContextTestExecutionListener$DelegateTestExecutionListener$SecuritySubContext.onSubscribe(ReactorContextTestExecutionListener.java:115) ~[spring-security-test-5.5.0.jar:5.5.0]
        at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Mono.subscribe(Mono.java:4150) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:81) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoNext$NextSubscriber.onComplete(MonoNext.java:102) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:166) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFlatMap$FlatMapMain.checkTerminated(FluxFlatMap.java:846) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFlatMap$FlatMapMain.drainLoop(FluxFlatMap.java:608) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFlatMap$FlatMapMain.drain(FluxFlatMap.java:588) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFlatMap$FlatMapMain.onComplete(FluxFlatMap.java:465) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onComplete(FluxPeekFuseable.java:277) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxIterable$IterableSubscription.slowPath(FluxIterable.java:292) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:228) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.request(FluxPeekFuseable.java:144) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFlatMap$FlatMapMain.onSubscribe(FluxFlatMap.java:371) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxPeekFuseable$PeekFuseableSubscriber.onSubscribe(FluxPeekFuseable.java:178) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:164) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:86) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:64) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:157) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1815) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxDefaultIfEmpty$DefaultIfEmptySubscriber.onComplete(FluxDefaultIfEmpty.java:108) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxMap$MapSubscriber.onComplete(FluxMap.java:142) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:166) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxMap$MapConditionalSubscriber.onComplete(FluxMap.java:269) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1816) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoCacheTime$CoordinatorSubscriber.signalCached(MonoCacheTime.java:337) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.MonoCacheTime$CoordinatorSubscriber.onNext(MonoCacheTime.java:354) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxPeek$PeekSubscriber.onNext(FluxPeek.java:199) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:73) ~[reactor-core-3.4.6.jar:3.4.6]
        at org.springframework.security.test.context.support.ReactorContextTestExecutionListener$DelegateTestExecutionListener$SecuritySubContext.onNext(ReactorContextTestExecutionListener.java:120) ~[spring-security-test-5.5.0.jar:5.5.0]
        at reactor.core.publisher.FluxSubscribeOnCallable$CallableSubscribeOnSubscription.run(FluxSubscribeOnCallable.java:251) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:68) ~[reactor-core-3.4.6.jar:3.4.6]
        at reactor.core.scheduler.SchedulerTask.call(SchedulerTask.java:28) ~[reactor-core-3.4.6.jar:3.4.6]
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264) ~[na:na]
        at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:304) ~[na:na]
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
        at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]

sephiroth-j

回答

1

在接受时发送 HAL 格式的响应application/json应该是 2.5 之前的版本。我几乎可以肯定 MVC 就是这样的，WebFlux 也打算这么做，但也许它并没有按预期运行。

为了帮助我们调查，您能否提供一个完整但最小的示例，该示例在 Spring Boot 2.5 中以一种方式工作，在降级到 Spring Boot 2.4 时以另一种方式工作？您可以通过将其压缩并附加到此问题或将其推送到 GitHub 上的单独存储库来与我们分享此类示例。

wilkinsona

5

这可能是 spring-projects/spring-hateoas#1453（在 spring-projects/spring-framework#26212 中请求）引入的意外行为 -ObjectMapper根据所选的媒体类型，可能无法正确选择自定义。

仍然非常需要一个示例应用程序。

bclozel

8

如果此更改（接受时发送 HAL 格式的响应application/json）是有意为之，则没问题。但设置后spring.hateoas.use-hal-as-default-json-media-type=false不应使应用程序无法使用。那么问题是我们如何恢复旧的行为？

我将尝试创建一个示例应用程序。

sephiroth-j

3

这是示例应用程序。spring -boot-issue-26814.zip

使用 Spring Boot 2.4.6，您可以使用浏览器发出 GET 请求（例如http://localhost:8080/demo/foo），它将产生类似这样的类型的响应application/json。 {"prop":"foo","links":[{"rel":"self","href":"/demo/{property}"}]}

使用 Spring Boot 2.5.0 将产生{"prop":"foo","_links":{"self":{"href":"/demo/{property}","templated":true}}}。spring.hateoas.use-hal-as-default-json-media-type=false您将收到上面提到的内部服务器错误。

sephiroth-j

1

感谢提供示例。问题是 Spring HATEOAS 已使用Jackson2JsonEncoder类型特定ObjectMapper注册定制了 ，org.springframework.hateoas.RepresentationModel您的DemoResponse是 的子类。此注册适用于application/hal+json媒体类型，但我们正在尝试生成application/json。DemoResponse是RepresentationModel子类，并且注册的媒体类型不包括application/json导致Jackson2JsonEncoder在被问及是否可以编码 时返回 false 。这与 @odrotbohm 正在调查的https://github.com/spring-projects/spring-hateoas/issues/1547DemoResponse非常相似。

wilkinsona

9

在这个特殊情况下，我认为如果当所有注册都不匹配时selectObjectMapper恢复到默认值而不是像现在这样返回，事情就会正常。我确信这会产生许多意想不到的副作用，可能会破坏我不知道的其他用例。我认为我们可能需要@rstoyanchev 的帮助。ObjectMappernull

wilkinsona

1

可以为 类型 注册默认ObjectMapper使用。application/json但这与设置为 基本相同。这意味着：链接和集合以 HAL 样式呈现。我想知道是否有可能恢复 的 Atom 样式渲染。WebFluxConfigurer.configureHttpMessageCodecs(ServerCodecConfigurer)org.springframework.hateoas.RepresentationModelspring.hateoas.use-hal-as-default-json-media-typetrueapplication/json

sephiroth-j

4

Spring HATEOAS 不会使用默认对象映射器注册任何内容，因此我希望响应采用其默认形式，而不是定制以匹配 HAL。为了验证这一点，我将以下 bean 添加到您的示例中：

@Bean
public WebFluxConfigurer webFluxConfigurer(ObjectMapper objectMapper) {
    return new WebFluxConfigurer() {
        @Override
        public void configureHttpMessageCodecs(ServerCodecConfigurer configurer) {
            configurer.defaultCodecs().configureDefaultCodec((codec) -> {
                if (codec instanceof Jackson2JsonEncoder) {
                    ((Jackson2JsonEncoder)codec).registerObjectMappersForType(RepresentationModel.class,
                            (registrations) -> registrations.put(MediaType.APPLICATION_JSON, objectMapper));
                }
            });
        }
    };
}

这会导致链接成为一个数组，就像在 2.4.x 中一样：

{"prop":"foo","links":[{"rel":"self","href":"/demo/{property}"}]}

wilkinsona

8

这是个好消息，谢谢！我尝试模仿 Spring HATEOAS WebfluxCodecCustomizer会做withGenericJsonTypes什么true。

HypermediaAutoConfiguration@wilkinsona，对于这个案例来说，您的方法可行吗spring.hateoas.use-hal-as-default-json-media-type=false？

sephiroth-j

9

这当然是一个选择，但我宁愿不采用它。这感觉就像是默认应该可以工作的东西，但我认为我们需要对 Spring HATEOAS 和/或 Spring Framework 进行一些更改才能实现这一点。让我们看看 @odrotbohm 和 @rstoyanchev 对此有何看法，然后我们可以从那里开始。

wilkinsona

6

这里有几件事在起作用：

  1. 在新的 Web(MVC|Flux) 配置应用程序下，Spring HATEOAS 1.3 的默认设置发生了变化。在 中声明的第一个媒体类型@EnableHypermediaSupport(…)也将服务于application/json和application/*+json。实施新配置方法的原因是，以前，可能请求服务器上未启用的 JSON 媒体类型，而 Web(MVC|Flux) 将返回序列化，而RepresentationModel没有媒体类型特定的自定义，从而有效地产生与请求的媒体类型不匹配的响应。
  2. 从未支持使用未配备媒体类型特定定制的序列化RepresentationModel实例所产生的表示。不幸的是，直到最新的 Spring Framework 和 Spring HATEOAS 版本发布之前，都没有办法阻止它的使用。如果您使用，强烈建议您搭载现有的超媒体类型，否则所有赌注都会以多种方式失效：客户端将不知道如何处理文档，特别是超媒体功能（不会告诉您如何查找链接）。此外，您现在被绑定到一种完全不受支持的序列化格式，每当我们调整模型时，这种格式可能会随意更改，例如出于 API（如 Java API）的原因。不幸的是，Jackson 甚至不知道媒体类型，并且 Web（MVC|Flux）刚刚进行了调整以确保，它实际上不会在没有明确应用超媒体定制的情况下渲染实例。例如，通过选择加入，您可以表达：我想使用超媒体媒体类型，然后实际这样做。ObjectMapperRepresentationModelapplication/jsonRepresentationModelRepresentationModel

有一种解决方法可以“解决”您的问题：application/json使用 Spring HATEOAS 注册为超媒体类型：

@Configuration
public class MyMediaTypeConfiguration implements HypermediaMappingInformation {

    @Override
    public List<MediaType> getMediaTypes() {
        return List.of(MediaType.APPLICATION_JSON);
    }
}

如果需要，这将注册未定制的对象映射器以供RepresentationModel实例使用application/json，从而使您的项目测试再次工作。

odrotbohm

9

谢谢@odrotbohm。我认为我们应该把这个问题变成一个文档问题。我们可以在文档的这一部分添加一些内容，以及将其设置为 accept 请求的spring.hateoas.use-hal-as-default-json-media-type后果。falseapplication/json

鉴于设置spring.hateoas.use-hal-as-default-json-media-type为将需要用户进行一些额外的配置，无论是以或 的false形式，我认为我们应该弃用该属性。这意味着用户可以定义自己的属性，而不必定义自己的属性并设置属性。HypermediaMappingInformationHalConfigurationHalConfigurationHalConfiguration

wilkinsona

6

如果激活该标志注册了上述配置，那么它实际上会执行与 2.4 期间相同的操作。更改实现以执行此操作是否有意义？

odrotbohm

6

我对此有点担心，因为这会很容易地做一些不受支持的事情，即鼓励人们将序列化为RepresentationModel纯 JSON。从您上面所说的来看，这似乎是个坏主意。这也与我们之前在考虑如何改进 HATEOAS 自动配置时商定的方法不一致。从那时起，很多事情可能都发生了变化，因此我们当然可以重新考虑现在是否采用不同的方法更有意义。

wilkinsona

0

@tmc9031 Spring Boot 2.7 中此方面没有任何变化。我看到您也在https://github.com/spring-projects/spring-data-rest/issues/2132上发表了评论。请不要在多个问题上问本质上相同的问题。如果上述讨论不足以帮助您，我会在 Stack Overflow 上提问，花时间提供您的问题的完整且最小的示例。

wilkinsona

7

@wilkinsona 有什么更新或 Stack Overflow 链接关于使用 JSON 代替 HAL 和 spring-data-rest 吗？非常感谢

tmc9031