Alamofire - POST request with JSON giving 301 - json

Question

I want to send POST request with JSON, I'm expecting JSON object with auth_token and refresh_token in response. My code looks like this:
let headers: HTTPHeaders = [
"Authorization": "Basic " + data.toBase64() //data is just string needed for authentication
]
// this should be a JSON
let parameters = [
"code": self.code,
"grant_type": "authorization_code",
"redirect_uri": "populi://callback"
]
Alamofire.request("https://populi.pl/api/v1/auth/token", method: .post, parameters: parameters, encoding: JSONEncoding.default, headers: headers).responseString { response in
print(response.request)
print("\n3 RESPONSE : \(response)")
print("\n3 POST : \(response.response)")
print("\n3 DATA : \(response.data)")
print("\n3 RESPONSE RESULT : \(response.result)")
print("\n3 RESPONSE RESULT VALUE : \(response.result.value)")
print("3 ERROR : \(response.error)")
}
Yeah, I print a lot of things, that's because I'm new to networking.
In response I'm getting 301 moved permanently. Why? I have no idea what's wrong. Is this wrong JSON in parameters or maybe something with redirecting? I should get 200 and JSON in response.

Answer 1

try this
func getData(){
let todoEndpoint: String = Your url
let params: Parameters = [yor parameters]
let headers: [String : String] = [
"Content-Type": "application/x-www-form-urlencoded",
]
Alamofire.request(todoEndpoint, method: .post, parameters: params,headers: headers)
.responseJSON { response in
switch response.result {
case .success:
let json = JSON(response.result.value as Any)
print(json)
break
case .failure(let error):
print(error)
}
}
}

Answer 2

I solved this with "/" at the end of request URL.

Answer 3

I was using URLSession for requests and was getting 301 for 1 request
then I tried Alamofire and still got the same response and at the end, I figured out that issue was that I was not appending / at the end of endpoint