Alamofire 4 Swift 3 ParameterEncoding Custom - ios

Question

I updated my project to Swift 3 and Alamofire 4. I was using custom Encoding, but it's changed to other encoding methods. I am not able to find the alternative/equivalent to this:
alamoFire.request(urlString, method: HTTPMethod.post, parameters: [:], encoding: .Custom({
(convertible, params) in
let mutableRequest = convertible.URLRequest.copy() as! NSMutableURLRequest
let data = (body as NSString).data(using: String.Encoding.utf8)
mutableRequest.httpBody = data
return (mutableRequest, nil)
}), headers: headers()).responseJSON { (responseObject) -> Void in
switch responseObject.result {
case .success(let JSON):
success(responseObject: JSON)
case .failure(let error):
failure(error: responseObject)
}
}
I also tried by making URLRequest object and simple request its also giving me errors
var request = URLRequest(url: URL(string: urlString)!)
let data = (body as NSString).data(using: String.Encoding.utf8.rawValue)
request.httpBody = data
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers()
alamoFire.request(request).responseJSON { (responseObject) -> Void in
switch responseObject.result {
case .success(let JSON):
success(JSON)
case .failure(let error):
failure(responseObject, error)
}
}
Do point me in some direction, how to attach httpbody with the Alamofire 4

Answer 1

Try this method?
Alamofire.request(url, method: HTTPMethod.post, parameters: parameters, encoding: URLEncoding.httpBody, headers: nil).responseObject(completionHandler: { (response : DataResponse<T>) in
})

Answer 2

In Alamofire 4.0 you should use ParameterEncoding protocol. Here is an example, which makes any String UTF8 encodable.
extension String: ParameterEncoding {
public func encode(_ urlRequest: URLRequestConvertible, with parameters: Parameters?) throws -> URLRequest {
var request = try urlRequest.asURLRequest()
request.httpBody = data(using: .utf8, allowLossyConversion: false)
return request
}
}
Alamofire.request("http://mywebsite.com/post-request", method: .post, parameters: [:], encoding: "myBody", headers: [:])