Alamofire 表单编码的 POST 请求因 responseSerializationFailed 而失败

Question

Making a request with Alamofire (swift 4) to an api endpoint (form encoded content type) and passing a username and password via login. When testing in POSTMAN, this endpoint works without errors and returns valid JSON (see below).

My swift code is as follows:

let headers = [
  "content-type": "application/x-www-form-urlencoded",
   "cache-control": "no-cache"
 ]
let parameters = [
   "username": "user@user.com", 
   "password": "password"
 ]
 Alamofire.request("https://xxxxx.com/api/login/", method: .post, parameters: parameters, encoding:  JSONEncoding.default, headers: headers).responseJSON { response in
   print(response)
 }

The response I get is as follows:

FAILURE: responseSerializationFailed(Alamofire.AFError.ResponseSerializationFailureReason.jsonSerializationFailed(Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.}))

Any insight would be appreciated!

Answer 1

Change JSONEncoding.default to URLEncoding.default as below,

Alamofire.request("https://xxxxx.com/api/login/", method: .post, parameters: parameters, encoding:  URLEncoding.default, headers: headers).responseJSON { response in
   print(response)
}