Question

我有从服务器返回的JSON有效负载，但是已加密。

让我们说改装电话看起来像这样：

@GET("/user/{id}/userprofile")  
void listUserProfile(@Path("id") int id, Callback<UserProfile> cb);

那么我如何告诉改造首先解密有效载荷然后使用gson将json转换为POJO（在本例中为UserProfile对象）？我正在使用okHttp进行http客户端。

Answer 1

可能为您的OkHttp客户端编写一个应用程序Interceptor，它将解密正文：

public class DecryptedPayloadInterceptor implements Interceptor {

    private final DecryptionStrategy mDecryptionStrategy;

    public interface DecryptionStrategy {
        String decrypt(InputStream stream);
    }

    public DecryptedPayloadInterceptor(DecryptionStrategy mDecryptionStrategy) {
        this.mDecryptionStrategy = mDecryptionStrategy;
    }

    @Override
    public Response intercept(Chain chain) throws IOException {
        Response response = chain.proceed(chain.request());
        if (response.isSuccessful()) {
            Response.Builder newResponse = response.newBuilder();
            String contentType = response.header("Content-Type");
            if (TextUtils.isEmpty(contentType)) contentType = "application/json";
            InputStream cryptedStream = response.body().byteStream();
            String decrypted = null;
            if (mDecryptionStrategy != null) {
                decrypted = mDecryptionStrategy.decrypt(cryptedStream);
            } else {
                throw new IllegalArgumentException("No decryption strategy!");
            }
            newResponse.body(ResponseBody.create(MediaType.parse(contentType), decrypted));
            return newResponse.build();
        }
        return response;
    }
}

如果你没有使用OkHttp，我会优雅地删除答案。

如何处理JSON有效负载的解密

1 个答案: