iOS Swift 2 - Alamofire print response value when Failure

Question

I'm using Alamofire for my http requests but I'm not able to get error message from requests that don't pass validation

Alamofire.request(method, url, headers: headers, parameters: parameters, encoding: encoding)
            .validate(statusCode: 200..<300)
            .responseJSON { response in

                switch response.result {
                case .Success:
                    // response.result.value returns JSON

                case .Failure(let error):
                    // response.result.value returns nil
                }
        }

How can I get data (JSON) if I get error code 400 and others. The API is sending the data in body even if the request was not successful.

Please see the answer here http://stackoverflow.com/a/35324741/5093900 — phantom_2, Nov 30 '16 at 15:24

score 3 · Answer 1 · answered Jan 29 '16 at 07:08

As Following SaiCYLi, Only way to get response data is avoid using validate.
See Result.swift in Alamofire.
There is blocker.

public var value: Value? {
    switch self {
    case .Success(let value):
        return value
    case .Failure:
        return nil
    }
}

I wanted comment to you instead of answering. But I have reputation less than 50. Sorry.

score 2 · Answer 2 · answered Jan 19 '16 at 01:26

just delete your validation of status code

Code:

Alamofire.request(method, url, headers: headers, parameters: parameters, encoding: encoding)
      .responseJSON { 
      response in
            let statusCode = response.response.statusCode
            switch statusCode {
            case 200..<300:
                // Success
            case 404:
                // not found
            default: 
                // something else
            }
    }

This solution is working and I know about this one but I want to use the validation — Stevik, Jan 19 '16 at 08:09

iOS Swift 2 - Alamofire print response value when Failure

2 Answers2