Почему запрос Retrofit GraphQL завершается неудачно с неожиданным символом 'M' ожидается '}'?

Question

Я пытаюсь выполнить GraphQL запросов снова с конечной точкой SWAPI

https://api.graphcms.com/simple/v1/swapi

с использованием Retrofit

My Retrofit API напоминает

@Headers("Content-Type: application/json")
@POST("swapi")
Single<Response<String>> query(@Body final String query);

My Retrofit Services

public class StarWarsService extends BaseService implements StarWarsApi {

    private static final String BASE_URL = "https://api.graphcms.com/simple/v1/";
    private static final StarWarsApi INSTANCE = new StarWarsService();

    /**
     * 
     * @return
     */
    public static StarWarsApi instance() {
        return INSTANCE;
    }

    private final StarWarsApi service;

    /**
     * 
     */
    private StarWarsService() {
        final Retrofit retrofit = new Retrofit.Builder().baseUrl(BASE_URL).client(okHttpClient)
                .addCallAdapterFactory(Java8CallAdapterFactory.create())
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .addConverterFactory(ScalarsConverterFactory.create()).build();

        service = retrofit.create(StarWarsApi.class);
    }

    @Override
    public Single<Response<String>> query(String query) {
        return service.query(query);
    }
}

Мой основной метод

private static final String QUERY_STAR_WARS_0001 = "{ \"query\": \"{Starship(name:\"Millennium Falcon\") { name, hyperdriveRating,  pilots(orderBy: height_DESC) { name, height, homeworld {name} } }}\"  }";   

public static void main(String[] args) {        
    StarWarsService.instance().query(QUERY_STAR_WARS_0001).subscribe();     

}

Я получаю следующие журналы

Sep 19, 2018 3:54:01 PM okhttp3.internal.platform.Platform log
INFO: --> POST https://api.graphcms.com/simple/v1/swapi
Sep 19, 2018 3:54:01 PM okhttp3.internal.platform.Platform log
INFO: Content-Type: application/json
Sep 19, 2018 3:54:01 PM okhttp3.internal.platform.Platform log
INFO: Content-Length: 145
aSep 19, 2018 3:54:01 PM okhttp3.internal.platform.Platform log
INFO: 
Sep 19, 2018 3:54:01 PM okhttp3.internal.platform.Platform log
INFO: { "query": "{Starship(name:"Millennium Falcon") { name, hyperdriveRating,  pilots(orderBy: height_DESC) { name, height, homeworld {name} } }}"  }
Sep 19, 2018 3:54:01 PM okhttp3.internal.platform.Platform log
INFO: --> END POST (145-byte body)
Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: <-- 400 https://api.graphcms.com/simple/v1/swapi (325ms)
Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: content-type: text/plain; charset=UTF-8
Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: content-length: 291
Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: date: Wed, 19 Sep 2018 14:54:39 GMT
Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: server: akka-http/10.0.8
Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: via: 1.1 cd9298825de9a9f64f66b3bc944bdd09.cloudfront.net (CloudFront), 1.1 3965285cac2a9323992ecbe26f94d453.cloudfront.net (CloudFront)
Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: x-cache: Error from cloudfront
Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: x-amz-cf-id: u17uzCW9lF5XI0o4_7hd5OatIqZshrKTlnX0G9iZWHb3CsJ8_Hobww==
Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: 
Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: The request content was malformed:
Unexpected character 'M' at input index 28 (line 1, position 29), expected '}':
{ "query": "{Starship(name:"Millennium Falcon") { name, hyperdriveRating,  pilots(orderBy: height_DESC) { name, height, homeworld {name} } }}"  }
                            ^

Sep 19, 2018 3:54:02 PM okhttp3.internal.platform.Platform log
INFO: <-- END HTTP (291-byte body)

Когда я могу выполнить тот же запрос с помощью онлайн-браузера GraphQL, «браузер» OK?

Какую ошибку я допустил в своем коде / подходе?

Answer 1

Какой бы код ни создавал объект JSON, он неправильно экранирует "символы внутри значений json.

{ "query": "{Starship(name:"Millennium Falcon") { name, hyperdriveRating,  pilots(orderBy: height_DESC) { name, height, homeworld {name} } }}"  }

должно быть

{ "query": "{Starship(name:\"Millennium Falcon\") { name, hyperdriveRating,  pilots(orderBy: height_DESC) { name, height, homeworld {name} } }}"  }