Access HTTPS RESTful service using Web Client in Spring Boot 2.0 throwing exception

Question

I have to access one https rest web service(https://example.com) for which certificate has been provided by the client which contains 2 .cer files.

I have created

Answer 1

I had a similar problem:

@Bean("oAuth2")
public WebClient webOAuth2Client(ReactiveClientRegistrationRepository registration,
                           ServerOAuth2AuthorizedClientRepository clientRepository) {

    ServerOAuth2AuthorizedClientExchangeFilterFunction filter =
            new ServerOAuth2AuthorizedClientExchangeFilterFunction(
                    registration,
                    clientRepository);
    filter.setDefaultClientRegistrationId("oAuth2");
   

    return WebClient
            .builder()
            .filter(filter)
            .build();
}

in property file something like:

    security:
    oauth2:
      client:
        provider:
          oAuth2:
            token-uri: url:port/auth/realms/SCRealm/protocol/openid-connect/token
        registration:
          oAuth2:
            clientId: client_id
            clientSecret: client_secret
            authorizationGrantType: client_credentials
            clientAuthenticationMethod: post

And in main application class :

System.setProperty("-Dio.netty.handler.ssl.noOpenSsl","true");
System.setProperty("javax.net.ssl.trustStore", "keyStore.jks");
System.setProperty("javax.net.ssl.trustStoreType", "JKS");
System.setProperty("javax.net.ssl.trustStorePassword", "any_strong_pass");