我正在使用 Retrofit 2 调用微服务，该微服务在 PUT 方法上返回 200 和空响应正文。
然而，Retrofit 2 似乎无法处理这个问题，并且在“enqueue”中转到 onFailure 分支
@覆盖
public void onFailure(Call call, Throwable t) {
以下是日志:
Mai 27, 2017 3:26:49 PM okhttp3.internal.platform.Platform log
INFORMATION: --> PUT http://127.0.0.1/test/ http/1.1
Mai 27, 2017 3:26:49 PM okhttp3.internal.platform.Platform log
INFORMATION: Content-Type: application/vnd.tipico.notification-v1+json
Mai 27, 2017 3:26:49 PM okhttp3.internal.platform.Platform log
INFORMATION: Content-Length: 87
Mai 27, 2017 3:26:49 PM okhttp3.internal.platform.Platform log
INFORMATION:
Mai 27, 2017 3:26:49 PM okhttp3.internal.platform.Platform log
INFORMATION: {"state":"ACTIVE","externalId":"abcd","loginName":"gsdfgsdf","updatedAt":1495531062000}
Mai 27, 2017 3:26:49 PM okhttp3.internal.platform.Platform log
INFORMATION: --> END PUT (87-byte body)
Mai 27, 2017 3:26:50 PM okhttp3.internal.platform.Platform log
INFORMATION: <-- 200 http://127.0.0.1/test/ (197ms)
Mai 27, 2017 3:26:50 PM okhttp3.internal.platform.Platform log
INFORMATION: X-Application-Context: customer-care-notification-service:49980
Mai 27, 2017 3:26:50 PM okhttp3.internal.platform.Platform log
INFORMATION: Content-Length: 0
Mai 27, 2017 3:26:50 PM okhttp3.internal.platform.Platform log
INFORMATION: Date: Sat, 27 May 2017 13:26:49 GMT
Mai 27, 2017 3:26:50 PM okhttp3.internal.platform.Platform log
INFORMATION: <-- END HTTP (0-byte body)
15:26:50,030 ERROR com.test.app.Test - Failed CCNS call com.fasterxml.jackson.databind.JsonMappingException: No content to map due to end-of-input
at [Source: okhttp3.ResponseBody$BomAwareReader@9eb187b; line: 1, column: 0]
谁知道这是什么原因造成的？由于请求已成功处理(见上文)。
最佳答案
我为此问题创建了一个 Null 处理程序转换器:
public class NullOnEmptyConverterFactory extends Converter.Factory {
@Override
public Converter<ResponseBody, ?> responseBodyConverter(Type type, Annotation[] annotations, Retrofit retrofit) {
final Converter<ResponseBody, ?> delegate = retrofit.nextResponseBodyConverter(this, type, annotations);
return (Converter<ResponseBody, Object>) body -> {
if (body.contentLength() == 0) return null;
return delegate.convert(body);
};
}
}
您需要在 Gson 转换器之前添加此转换器
.addConverterFactory(new NullOnEmptyConverterFactory())
关于Retrofit2 OkHttp3响应正文为空错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/44217447/