Spring Webflux：即使我使用的是OAuth 2.0客户端凭据，对于redirectUriTemplate的声明也不为空

Question

我正在使用带有spring-boot-starter-webflux，spring-boot-starter-security和spring-security-oauth2-client的Spring Boot 2.2.4。

使用响应式WebClient，我想使用WebClient调用Auth0's management API以获取一些用户信息。

我关注了OAuth 2.0 client credentials。我的Baeldung's Spring WebClient and OAuth2 Support tutorial看起来像这样：

application.properties

[我的春天

spring.security.oauth2.client.registration.auth0.authorization-grant-type=client_credentials
spring.security.oauth2.client.registration.auth0.client-id=XXX
spring.security.oauth2.client.registration.auth0.client-secret=YYY
spring.security.oauth2.client.provider.auth0.token-uri=https://ZZZ.eu.auth0.com/oauth/token

像这样：

@Configuration

但是当我用

@Configuration
@RequiredArgsConstructor
class Auth0Configuration {

    @Value("${auth0.api.base-url}")
    private final String auth0ApiBaseUrl;

    @Bean
    WebClient auth0WebClient(ReactiveClientRegistrationRepository reactiveClientRegistrationRepository) {
        ServerOAuth2AuthorizedClientExchangeFilterFunction oauth =
                new ServerOAuth2AuthorizedClientExchangeFilterFunction(
                        reactiveClientRegistrationRepository,
                        new UnAuthenticatedServerOAuth2AuthorizedClientRepository());
        oauth.setDefaultClientRegistrationId("auth0");
        return WebClient.builder()
                .filter(oauth)
                .baseUrl(auth0ApiBaseUrl)
                .build();
    }

}

进行第一次呼叫时，会发生此错误：

WebClient

[遵循堆栈跟踪时，我看到

2020-02-12 20:18:11.098 ERROR 1945 --- [ctor-http-nio-3] a.w.r.e.AbstractErrorWebExceptionHandler : [f0218135]  500 Server Error for HTTP GET "/oauth2/authorization/auth0"

java.lang.IllegalArgumentException: URI must not be null
    at org.springframework.util.Assert.notNull(Assert.java:198)
    Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):
    |_ checkpoint ⇢ org.springframework.security.oauth2.client.web.server.OAuth2AuthorizationRequestRedirectWebFilter [DefaultWebFilterChain]
    |_ checkpoint ⇢ org.springframework.security.web.server.context.ReactorContextWebFilter [DefaultWebFilterChain]
    |_ checkpoint ⇢ org.springframework.security.web.server.csrf.CsrfWebFilter [DefaultWebFilterChain]
    |_ checkpoint ⇢ org.springframework.security.web.server.header.HttpHeaderWriterWebFilter [DefaultWebFilterChain]
    |_ checkpoint ⇢ org.springframework.security.config.web.server.ServerHttpSecurity$ServerWebExchangeReactorContextWebFilter [DefaultWebFilterChain]
    |_ checkpoint ⇢ org.springframework.security.web.server.WebFilterChainProxy [DefaultWebFilterChain]
    |_ checkpoint ⇢ org.springframework.boot.actuate.metrics.web.reactive.server.MetricsWebFilter [DefaultWebFilterChain]
    |_ checkpoint ⇢ HTTP GET "/oauth2/authorization/auth0" [ExceptionHandlingWebHandler]
Stack trace:
        at org.springframework.util.Assert.notNull(Assert.java:198)
        at org.springframework.web.util.UriComponentsBuilder.fromUriString(UriComponentsBuilder.java:212)
        at org.springframework.security.oauth2.client.web.server.DefaultServerOAuth2AuthorizationRequestResolver.expandRedirectUri(DefaultServerOAuth2AuthorizationRequestResolver.java:214)
        at org.springframework.security.oauth2.client.web.server.DefaultServerOAuth2AuthorizationRequestResolver.authorizationRequest(DefaultServerOAuth2AuthorizationRequestResolver.java:131)
        at org.springframework.security.oauth2.client.web.server.DefaultServerOAuth2AuthorizationRequestResolver.lambda$resolve$3(DefaultServerOAuth2AuthorizationRequestResolver.java:121)
        at reactor.core.publisher.FluxMap$MapSubscriber.onNext(FluxMap.java:100)
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67)
        at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2199)
        at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.set(Operators.java:2007)
        at reactor.core.publisher.Operators$MultiSubscriptionSubscriber.onSubscribe(Operators.java:1881)
        at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54)
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55)
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121)
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:112)
        at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2199)
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:184)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:162)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:162)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.request(FluxMapFuseable.java:162)
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:103)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onSubscribe(FluxMapFuseable.java:90)
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:81)
        at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54)
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.core.publisher.Mono.subscribe(Mono.java:4105)
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:172)
        at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56)
        at reactor.core.publisher.Mono.subscribe(Mono.java:4105)
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:75)
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onComplete(MonoFlatMap.java:174)
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onComplete(MonoFlatMap.java:174)
        at reactor.core.publisher.FluxFilter$FilterSubscriber.onComplete(FluxFilter.java:160)
        at reactor.core.publisher.FluxFilter$FilterConditionalSubscriber.onComplete(FluxFilter.java:293)
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onComplete(FluxSwitchIfEmpty.java:78)
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1638)
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:144)
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onNext(FluxFilterFuseable.java:112)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onNext(FluxMapFuseable.java:287)
        at reactor.core.publisher.Operators$ScalarSubscription.request(Operators.java:2199)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.request(FluxMapFuseable.java:346)
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.request(FluxFilterFuseable.java:184)
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onSubscribe(MonoFlatMap.java:103)
        at reactor.core.publisher.FluxFilterFuseable$FilterFuseableSubscriber.onSubscribe(FluxFilterFuseable.java:81)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableConditionalSubscriber.onSubscribe(FluxMapFuseable.java:255)
        at reactor.core.publisher.MonoJust.subscribe(MonoJust.java:54)
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121)
        at reactor.core.publisher.FluxMapFuseable$MapFuseableSubscriber.onNext(FluxMapFuseable.java:121)
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1637)
        at reactor.core.publisher.MonoFlatMap$FlatMapInner.onNext(MonoFlatMap.java:241)
        at reactor.core.publisher.Operators$MonoSubscriber.complete(Operators.java:1637)
        at reactor.core.publisher.MonoCollectList$MonoCollectListSubscriber.onComplete(MonoCollectList.java:121)
        at reactor.core.publisher.FluxIterable$IterableSubscription.fastPath(FluxIterable.java:333)
        at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:198)
        at reactor.core.publisher.MonoCollectList$MonoCollectListSubscriber.onSubscribe(MonoCollectList.java:72)
        at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139)
        at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63)
        at reactor.core.publisher.MonoFromFluxOperator.subscribe(MonoFromFluxOperator.java:72)
        at reactor.core.publisher.MonoFlatMap$FlatMapMain.onNext(MonoFlatMap.java:150)
        at reactor.core.publisher.FluxSwitchIfEmpty$SwitchIfEmptySubscriber.onNext(FluxSwitchIfEmpty.java:67)
        at reactor.core.publisher.MonoNext$NextSubscriber.onNext(MonoNext.java:76)
        at reactor.core.publisher.FluxFilterWhen$FluxFilterWhenSubscriber.drain(FluxFilterWhen.java:295)
        at reactor.core.publisher.FluxFilterWhen$FluxFilterWhenSubscriber.onNext(FluxFilterWhen.java:134)
        at reactor.core.publisher.FluxIterable$IterableSubscription.slowPath(FluxIterable.java:243)
        at reactor.core.publisher.FluxIterable$IterableSubscription.request(FluxIterable.java:201)
        at reactor.core.publisher.FluxFilterWhen$FluxFilterWhenSubscriber.onSubscribe(FluxFilterWhen.java:194)
        at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:139)
        at reactor.core.publisher.FluxIterable.subscribe(FluxIterable.java:63)
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55)
        at reactor.core.publisher.MonoDefer.subscribe(MonoDefer.java:52)
        at reactor.core.publisher.Mono.subscribe(Mono.java:4105)
        at reactor.core.publisher.MonoIgnoreThen$ThenIgnoreMain.drain(MonoIgnoreThen.java:172)
        at reactor.core.publisher.MonoIgnoreThen.subscribe(MonoIgnoreThen.java:56)
        at reactor.core.publisher.InternalMonoOperator.subscribe(InternalMonoOperator.java:55)
        at reactor.netty.http.server.HttpServerHandle.onStateChange(HttpServerHandle.java:64)
        at reactor.netty.tcp.TcpServerBind$ChildObserver.onStateChange(TcpServerBind.java:228)
        at reactor.netty.http.server.HttpServerOperations.onInboundNext(HttpServerOperations.java:465)
        at reactor.netty.channel.ChannelOperationsHandler.channelRead(ChannelOperationsHandler.java:90)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
        at reactor.netty.http.server.HttpTrafficHandler.channelRead(HttpTrafficHandler.java:167)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
        at io.netty.channel.CombinedChannelDuplexHandler$DelegatingChannelHandlerContext.fireChannelRead(CombinedChannelDuplexHandler.java:436)
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:321)
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:295)
        at io.netty.channel.CombinedChannelDuplexHandler.channelRead(CombinedChannelDuplexHandler.java:251)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:355)
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:377)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:363)
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919)
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:714)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:650)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:576)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493)
        at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989)
        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.base/java.lang.Thread.run(Thread.java:830)

中的属性redirectUriTemplate为ClientRegistration。但是因为我使用的是客户端凭据，所以根本不需要重定向URI。

我的配置是否有错误？如何使ClientRegistration与客户端凭据流一起使用？

Answer 1

我已经从null中删除了WebClient。

我的spring-boot-starter-webflux现在看起来像这样：

build.gradle

我的@Configuration终于可以工作了。