spring-boot ReactiveClientRegistrationRepository not found

Environment: Spring Boot 2.3.1, Java 11

I have tried out a few things already (also comparing with the sample-app by spring), but so far I have been unsuccessful in creating a WebClient that requires a ReactiveClientRegistrationRepository.

I get the following exception when starting up my spring-boot application:

required a bean of type 'org.springframework.security.oauth2.client.registration.ReactiveClientRegistrationRepository'

The way I understand spring-boot-autoconfigure it should use the ReactiveOAuth2ClientAutoConfiguration, as in the yml-file the required properties are given.

Following some code-snippets, I can provide more if something is missing to get the whole context

Main-Class

@Slf4j
@SpringBootApplication
@EnableConfigurationProperties(MyAppConfigurationProperties.class)
public class MyApp{
public static void main(final String[] args) {
SpringApplication.run(MyApp.class, args);
}
}

Configuration:

@Configuration
//@Import(ReactiveOAuth2ClientAutoConfiguration.class) // in the test it works with this, but should not be required: spring-boot-autoconfigure
public class MyRestClientConfig {
@Bean
WebClient myWebClient(WebClient.Builder builder, ReactiveClientRegistrationRepository clientRegistrations) {
//content not relevant to this problem
}
}

Configuration for security

@EnableGlobalMethodSecurity(securedEnabled = true)
@EnableWebSecurity
@EnableWebFluxSecurity
public class SecurityConfig {
}

application.yml

spring:
security:
oauth2:
client:
registration:
providerid:
authorization-grant-type: "client_credentials"
client-id: "myClientId"
client-secret: "mySecret"
user-info-authentication-method: header
provider:
providerid:
token-uri: "working token-uri"

I tried with different dependencies, so some may not be required. Which dependencies are actually required?

pom.xml

        <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-oauth2-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-autoconfigure</artifactId>
</dependency>
<!--        <dependency>-->
<!--            <groupId>org.springframework.security.oauth.boot</groupId>-->
<!--            <artifactId>spring-security-oauth2-autoconfigure</artifactId>-->
<!--        </dependency>-->
<!--        <dependency>-->
<!--            <groupId>org.springframework.security.oauth</groupId>-->
<!--            <artifactId>spring-security-oauth2</artifactId>-->
<!--        </dependency>-->
<!--        <dependency>-->
<!--            <groupId>org.springframework.boot</groupId>-->
<!--            <artifactId>spring-boot-starter-oauth2-client</artifactId>-->
<!--        </dependency>-->
<!--        <dependency>-->
<!--            <groupId>org.springframework.security</groupId>-->
<!--            <artifactId>spring-security-oauth2-core</artifactId>-->
<!--        </dependency>-->
<!--        <dependency>-->
<!--            <groupId>org.springframework.security</groupId>-->
<!--            <artifactId>spring-security-oauth2-jose</artifactId>-->
<!--        </dependency>-->
<!--        <dependency>-->
<!--            <groupId>org.springframework.boot</groupId>-->
<!--            <artifactId>spring-boot-starter-webflux</artifactId>-->
<!--        </dependency>-->

In an integration-test the Spring-Boot-Application starts up

@EnableConfigurationProperties
@Import(ReactiveOAuth2ClientAutoConfiguration.class)  // in the test it works with this, but should not be required: spring-boot-autoconfigure, can be omitted if added in MyRestClientConfig
@ComponentScan(basePackages = "com.mycompany")
public class ManualClientTester {
}

EDIT 1:
Debug of Positive Matches for Autoconfiguration

In test where it works:

============================
CONDITIONS EVALUATION REPORT
============================
Positive matches:
-----------------
ReactiveOAuth2ClientAutoConfiguration matched:
- @ConditionalOnClass found required classes 'reactor.core.publisher.Flux', 'org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity', 'org.springframework.security.oauth2.client.registration.ClientRegistration' (OnClassCondition)
- NoneNestedConditions 0 matched 1 did not; NestedCondition on ReactiveOAuth2ClientAutoConfiguration.NonServletApplicationCondition.ServletApplicationCondition not a servlet web application (ReactiveOAuth2ClientAutoConfiguration.NonServletApplicationCondition)
ReactiveOAuth2ClientConfigurations.ReactiveClientRegistrationRepositoryConfiguration matched:
- OAuth2 Clients Configured Condition found registered clients myClientId (ClientsConfiguredCondition)
- @ConditionalOnMissingBean (types: org.springframework.security.oauth2.client.registration.ReactiveClientRegistrationRepository; SearchStrategy: all) did not find any beans (OnBeanCondition)
ReactiveOAuth2ClientConfigurations.ReactiveOAuth2ClientConfiguration matched:
- @ConditionalOnBean (types: org.springframework.security.oauth2.client.registration.ReactiveClientRegistrationRepository; SearchStrategy: all) found bean 'clientRegistrationRepository' (OnBeanCondition)
ReactiveOAuth2ClientConfigurations.ReactiveOAuth2ClientConfiguration#authorizedClientRepository matched:
- @ConditionalOnMissingBean (types: org.springframework.security.oauth2.client.web.server.ServerOAuth2AuthorizedClientRepository; SearchStrategy: all) did not find any beans (OnBeanCondition)
ReactiveOAuth2ClientConfigurations.ReactiveOAuth2ClientConfiguration#authorizedClientService matched:
- @ConditionalOnMissingBean (types: org.springframework.security.oauth2.client.ReactiveOAuth2AuthorizedClientService; SearchStrategy: all) did not find any beans (OnBeanCondition)

When starting my spring boot application:

============================
CONDITIONS EVALUATION REPORT
============================
Negative matches:
-----------------
ReactiveOAuth2ClientAutoConfiguration:
Did not match:
- NoneNestedConditions 1 matched 0 did not; NestedCondition on ReactiveOAuth2ClientAutoConfiguration.NonServletApplicationCondition.ServletApplicationCondition found 'session' scope (ReactiveOAuth2ClientAutoConfiguration.NonServletApplicationCondition)
Matched:
- @ConditionalOnClass found required classes 'reactor.core.publisher.Flux', 'org.springframework.security.config.annotation.web.reactive.EnableWebFluxSecurity', 'org.springframework.security.oauth2.client.registration.ClientRegistration' (OnClassCondition)

EDIT 2:
After changing as suggested, I have now the following:

@EnableReactiveMethodSecurity
@EnableWebFluxSecurity
public class SecurityConfig {
}

pom.xml

        <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-oauth2-client</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-webflux</artifactId>
</dependency>

Furthermore all used versions of spring-projects:

    <spring-amqp.version>2.2.7.RELEASE</spring-amqp.version>
<spring-batch.version>4.2.4.RELEASE</spring-batch.version>
<spring-boot.version>2.3.1.RELEASE</spring-boot.version>
<spring-data-releasetrain.version>Neumann-SR1</spring-data-releasetrain.version>
<spring-framework.version>5.2.7.RELEASE</spring-framework.version>
<spring-hateoas.version>1.1.0.RELEASE</spring-hateoas.version>
<spring-integration.version>5.3.1.RELEASE</spring-integration.version>
<spring-kafka.version>2.5.2.RELEASE</spring-kafka.version>
<spring-ldap.version>2.3.3.RELEASE</spring-ldap.version>
<spring-restdocs.version>2.0.4.RELEASE</spring-restdocs.version>
<spring-retry.version>1.2.5.RELEASE</spring-retry.version>
<spring-security.version>5.3.3.RELEASE</spring-security.version>
<spring-session-bom.version>Dragonfruit-RELEASE</spring-session-bom.version>
<spring-ws.version>3.0.9.RELEASE</spring-ws.version>
<spring.boot.version>2.3.1.RELEASE</spring.boot.version>
<spring.cloud.version>Hoxton.SR5</spring.cloud.version>

The problem still exists.

I ran into the same problem and noticed that the application created a ClientRegistrationRepository instead of a ReactiveClientRegistrationRepository. Somewhere in Spring boot the @EnableWebSecurity was added (we need the @EnableWebFluxSecurity in this case).

To fix the problem I've added the following property:

spring.main.web-application-type: reactive

If you're also using @SpringBootTest to test your application you also need to add the property there.

@SpringBootTest(properties = ["spring.main.web-application-type=reactive]")

or by setting the web environment to NONE

@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.NONE)

The reason why this happens is also explained in this answer: https://stackoverflow.com/questions/62558552/error-when-using-enablewebfluxsecurity-in-springboot

I'm still not happy about my solution, but I ended up doing the following:

    @Bean
public ReactiveClientRegistrationRepository reactiveClientRegistrationRepository(OAuth2ClientProperties oAuth2ClientProperties) {
List<ClientRegistration> clientRegistrations = new ArrayList<>();
// because autoconfigure does not work for an unknown reason, here the ClientRegistrations are manually configured based on the application.yml
oAuth2ClientProperties.getRegistration()
.forEach((k, v) -> {
String tokenUri = oAuth2ClientProperties.getProvider().get(k).getTokenUri();
ClientRegistration clientRegistration = ClientRegistration
.withRegistrationId(k)
.tokenUri(tokenUri)
.clientId(v.getClientId())
.clientSecret(v.getClientSecret())
.authorizationGrantType(AuthorizationGrantType.CLIENT_CREDENTIALS)
.build();
clientRegistrations.add(clientRegistration);
});
return new InMemoryReactiveClientRegistrationRepository(clientRegistrations);
}

I use the spring-properties for OAuth and then create the ReactiveClientRegistrationRepository based on those properties.

Works this way:

@Bean
public WebClient webClient(ClientRegistrationRepository clientRegistrationRepository) {
InMemoryReactiveClientRegistrationRepository registrationRepository = new InMemoryReactiveClientRegistrationRepository(clientRegistrationRepository.findByRegistrationId("REG_ID"));
InMemoryReactiveOAuth2AuthorizedClientService clientService = new InMemoryReactiveOAuth2AuthorizedClientService(registrationRepository);
AuthorizedClientServiceReactiveOAuth2AuthorizedClientManager clientManager = new AuthorizedClientServiceReactiveOAuth2AuthorizedClientManager(registrationRepository, clientService);
return WebClient.builder()
.baseUrl(BASEURL)
.filter(new ServerOAuth2AuthorizedClientExchangeFilterFunction(clientManager))
.build();
}

Properties:

spring.security.oauth2.client.registration.REG_ID.client-id=CLIENT_ID
spring.security.oauth2.client.registration.REG_ID.client-name=CLIENT_NAME
spring.security.oauth2.client.registration.REG_ID.client-secret=SECRET
spring.security.oauth2.client.registration.REG_ID.authorization-grant-type=client_credentials
spring.security.oauth2.client.registration.REG_ID.scope=SCOPE
spring.security.oauth2.client.provider.REG_ID.issuer-uri=PATH_TO_.well-known/openid-configuration_SITE

EDIT:

Add the following before the return statement:

ServerOAuth2AuthorizedClientExchangeFilterFunction clientExchangeFilterFunction = new ServerOAuth2AuthorizedClientExchangeFilterFunction(clientManager);
clientExchangeFilterFunction.setDefaultClientRegistrationId("REG_ID");

And replace filter in the return statement with:

.filter(clientExchangeFilterFunction)

I solved this by writing this code

@Bean("oauthWebClient")
WebClient webClient(ClientRegistrationRepository clientRegistrations) {
InMemoryReactiveClientRegistrationRepository registrationRepository = new InMemoryReactiveClientRegistrationRepository(
clientRegistrations.findByRegistrationId("reg-id"));
ServerOAuth2AuthorizedClientExchangeFilterFunction oauth =
new ServerOAuth2AuthorizedClientExchangeFilterFunction(
registrationRepository,
new UnAuthenticatedServerOAuth2AuthorizedClientRepository());
oauth.setDefaultClientRegistrationId("reg-id");
return WebClient.builder()
.filter(oauth)
.build();
}

Update:

Looks like the "user-info-authentication-method" (userInfoAuthenticationMethod) is part of the Provider and not the Registration. And please remove the double quotes too.

spring:
security:
oauth2:
client:
registration:
providerid:
authorization-grant-type: client_credentials
client-id: myClientId
client-secret: mySecret
provider:
providerid:
token-uri: <working token-uri>
user-info-authentication-method: header

Also a suggestion - to avoid possible conflicting/ incompatible dependencies, please use dependency management like this and try to have all spring boot starters. eg the spring security library comes as part of both spring-boot-starter-oauth2-client and spring-boot-starter-oauth2-resource-server:

	<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>2.3.1.RELEASE</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>

Just these 2 dependencies should do the work: (these are picked from Gradle file, please change them to POM equivalent)

implementation 'org.springframework.boot:spring-boot-starter-webflux'
implementation 'org.springframework.boot:spring-boot-starter-oauth2-client'

For tests, probably you may need this:

testImplementation 'org.springframework.security:spring-security-test:5.3.3.RELEASE'

You should not mix the two together:

@EnableWebSecurity
@EnableWebFluxSecurity

If your application is reactive, then just use @EnableWebFluxSecurity.

And coming to @EnableGlobalMethodSecurity(securedEnabled = true) , this is described here, and is recommended to remove that and use this instead:

@EnableReactiveMethodSecurity

it's difficult to provide relevant answer without a stacktrace.

Seem that Spring boot cant create ReactiveClientRegistrationRepository from your properties file.

Try to add a provider property on your client.

oauth2:
client:
registration:
registrationId:
provider: providerId
client-id: clientId
client-secret: secret
authorization-grant-type: client_credentials

ReactiveClientRepositoryRegistration Bean needs to be defined explicitly. You can refer to the spring documentation
https://docs.spring.io/spring-security/reference/reactive/oauth2/login/core.html#webflux-oauth2-login-register-reactiveclientregistrationrepository-bean

In my case, I wanted to use the WebClient in a Spring Boot Servlet Stack, whereas the WebClient shall use Client Credentials to be able to access protected resources at external services. https://docs.spring.io/spring-security/site/docs/5.1.1.RELEASE/reference/html/servlet-webclient.html helped me to configure the web client to work in a servlet stack correctly