如何从MoyaError获取错误响应

本文介绍了如何从MoyaError获取错误响应的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

类似于 this ，但这一次我需要检索服务器的JSOn响应.

similar to this but this time i need to retrieve the JSOn response of the server.

这是我现有的代码:

return Observable.create{ observer in let _ = self.provider .request(.getMerchantDetails(qrId: qrId)) .filterSuccessfulStatusCodes() .mapJSON() .subscribe(onNext: { response in observer.onNext(RQRMerchant(json: JSON(response))) }, onError: { error in observer.onError(error) }) return Disposables.create()

我的问题是:我可以通过error.localizedDescription获取错误响应代码404，但我也想获取404 HTTP请求的JSON响应.

my question is: I can get the error response code 404 by error.localizedDescription But I also want to get the JSON response of the 404 HTTP request.

推荐答案

我也遇到了同样的问题，对我来说，最简单，最干净的解决方案是扩展MoyaError，以包括已解码错误对象的属性. .在我的情况下，我使用的是Decodable对象，因此您可以为可解码的BackendError编写类似的代码，以表示可能从服务器获取的错误:

I've been faced with the same problem, and for me the easiest and cleanest solution was to extend MoyaError to include a property for the decoded error object. In my case I'm using Decodable objects, so you could write something like this for a decodable BackendError representing the error you may get from your server:

extension MoyaError { public var backendError: BackendError? { return response.flatMap { try? $0.map(BackendError.self) } } }

如果您更喜欢直接处理JSON，则可以调用mapJSON方法，而不是映射到Decodable.

If you instead prefer to directly deal with JSON you can invoke the mapJSONmethod instead of mapping to a Decodable.

然后，您只需要执行以下操作即可获取不成功的状态代码的错误信息:

Then you just have to do the following to get the error information for non successful status codes:

onError: { error in let backendError = (error as? MoyaError).backendError }