Alamofire返回.Success错误HTTP状态代码 [英] Alamofire returns .Success on error HTTP status codes

问题描述

我有一个非常简单的场景，我正在努力。我正在使用Alamofire在rest API上注册用户。第一次注册调用成功，用户可以登录。第二次调用，当尝试使用相同的电子邮件地址注册时，应该从服务器获得HTTP状态代码409。但是，Alamofire会返回一个带有空请求和响应的.Success。我用postman测试了这个API，它正确地返回了409.

I have a pretty simple scenario that I'm struggling with. I'm using Alamofire to register a user on a rest API. The first call to register is successful and the user can log in. The second call, when trying to register with the same email address should result in a HTTP status code 409 from the server. Alamofire, however, returns a .Success with an empty request and response. I have tested this this API with postman and it correctly returns a 409.

为什么Alamofire没有返回.Failure（错误），错误有状态代码信息等？

Why is Alamofire not returning .Failure(error), where the error has status code info etc?

这是我每次使用相同输入运行的调用。

Here is the call I run with the same input each time.

Alamofire.request(.POST, "http://localhost:8883/api/0.1/parent", parameters: registrationModel.getParentCandidateDictionary(), encoding: .JSON).response(completionHandler: { (req, res, d, e) -> Void in
        print(req, res, d, e)
    })

推荐答案

来自Alamofire 手册：

From the Alamofire manual:

验证

Validation

默认情况下，无论响应的内容如何，​​Alamofire都会将完成的任何请求视为成功，
。如果响应具有
不可接受的状态代码或MIME类型，则在
响应处理程序之前调用validate会导致生成错误。

By default, Alamofire treats any completed request to be successful, regardless of the content of the response. Calling validate before a response handler causes an error to be generated if the response had an unacceptable status code or MIME type.

您可以再次使用手册中的验证方法手动验证状态代码：

You can manually validate the status code using the validate method, again, from the manual:

Alamofire.request(.GET, "https://httpbin.org/get", parameters: ["foo": "bar"])
     .validate(statusCode: 200..<300)
     .validate(contentType: ["application/json"])
     .response { response in
         print(response)
     }

或者您可以使用验证 c>半自动验证状态代码和内容类型没有参数：

Or you can semi-automatically validate the status code and content-type using the validate with no arguments:

Alamofire.request(.GET, "https://httpbin.org/get", parameters: ["foo": "bar"])
     .validate()
     .responseJSON { response in
         switch response.result {
         case .success:
             print("Validation Successful")
         case .failure(let error):
             print(error)
         }
     }

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