spring boot - Swagger TypeError: Failed to execute 'fetch' on 'Window': Request with GET/HEAD method cannot have body

Question

I have added Swagger to my Spring Boot 2 application:

This is my Swagger config:

@Configuration
@EnableSwagger2
public class SwaggerConfig {

    @Bean
    public Docket api() {
        // @formatter:off
        return new Docket(DocumentationType.SWAGGER_2)  
                .select()                                  
                .apis(RequestHandlerSelectors.any())              
                .paths(PathSelectors.any())                          
                .build();
        // @formatter:on
    }
}

This is Maven dependency:

<!-- Swagger2 -->
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger2</artifactId>
    <version>2.8.0</version>
</dependency>
<dependency>
    <groupId>io.springfox</groupId>
    <artifactId>springfox-swagger-ui</artifactId>
    <version>2.8.0</version>
</dependency>

When I try to invoke for example http://localhost:8080/api/actuator/auditevents it fails with the following error:

TypeError: Failed to execute 'fetch' on 'Window': Request with GET/HEAD method cannot have body.

What am I doing wrong and how to fix it ?

Answer 1

The error message actually says what the problem is. You post data with curl using the -d option while trying to use GET.

If you use the -d option curl will do POST.
If you use -X GET option curl will do GET.

The HTTP GET method is for requesting a representation of the specified resource. Requests using GET should only retrieve data and hence cannot have body.

More info on GET vs POST