Combined Eureka and Configuration Server Returns XML

I am migrating our Spring Cloud application from Angel.SR3 to Brixton.M3. Currently, we have combined the config server and the eureka server into a single app:

@SpringBootApplication
@EnableConfigServer
@EnableEurekaServer
public class DepbugApplication {

    public static void main(String[] args) {
        SpringApplication.run(DepbugApplication.class, args);
    }
}

I have set “spring.cloud.config.server.prefix” to “configuration”

In the Angel.SR3 release:

http://host:port/eureka/apps is returned as XML. http://host:port/configuration/appname/profile is returned as JSON

In the Brixton.M3 release:

http://host:port/eureka/apps is returned as XML. http://host:port/configuration/appname/profile is returned as XML

I believe this is because the eureka maven artifact has a runtime dependency on jackson-dataformat-xml which is then picked up by Spring Boot.

I am able to get the JSON version of the configuration by suffixing the URL with .json but JSON really should be the default/only format for the configuration end points.

In looking at the content negotiation in Spring MVC, it looks like this could be fixed by adding

produces={“application/json”} to the @RequestMapping for the various config server end points.

[pcornelissen]

Found the culprit by accident 😃 It’s the cloud starter for eureka!

To fix the issue just use this:

      <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>com.fasterxml.jackson.dataformat</groupId>
                    <artifactId>jackson-dataformat-xml</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

[tkvangorder]

Additional Information:

Chrome is sending the following in its Http Request Header:

Accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8

I was able to work around this issue by extending the WebMvcConfigurerAdapter and telling the content negotiation to ignore the accept header and default to JSON:

@SpringBootApplication
@EnableConfigServer
@EnableEurekaServer
public class DepbugApplication extends WebMvcConfigurerAdapter {

    public static void main(String[] args) {
        SpringApplication.run(DepbugApplication.class, args);
    }

   @Override
   public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
     configurer.ignoreAcceptHeader(true).defaultContentType(MediaType.APPLICATION_JSON);
   }

}