Swift 3 - issue to create easy request method POST (URLRequestVonvertible) - ios

Question

I am developing an application with Swift 3.0 and IOS 10 in Xcode 8.3.2. But I have a problem when I try to retrieve the JSON from this APIRest (http://schematic-ipsum.herokuapp.com/). What is the problem? Or how you would make the call. If you need more information regarding the code, tell me, but basically, I just want to make a call to that page to recover the biography.
enter image description here
My code is this:
import AlamofireDomain
import Alamofire
import ObjectMapper
class AuthorDAO : SimpleDAO {
func getBiography(_ parameters: Dictionary<String, Int>,
callbackFuncionOK: #escaping
(PropertiesAuthorModel)->(),
callbackFunctionERROR: #escaping (Int,NSError)->()) {
let ulr = NSURL( string: "http://schematic-ipsum.herokuapp.com/" as String)
let request = NSMutableURLRequest(url: ulr! as URL)
request.httpMethod = "POST"
request.setValue("application/json", forHTTPHeaderField: "Constent-Type")
let data = try! JSONSerialization.data(withJSONObject: parameters, options: JSONSerialization.WritingOptions.prettyPrinted)
let json = NSString(data: data, encoding: String.Encoding.utf8.rawValue)
if let json = json {
print(json)
}
request.httpBody = json!.data(using: String.Encoding.utf8.rawValue)
Alamofire.request(request as URLRequest)
.responseJSON { response in
if response.result.isSuccess{
if let status = response.response?.statusCode {
switch(status){
//MARK: CONTROL ON DIFERENTS KINDS OF RESPONSES ON SERVER
case 200:
if let value = response.result.value {
let biographyResponse = Mapper<PropertiesAuthorModel>().map(JSONObject: value)
callbackFuncionOK(biographyResponse!)
}
//case 400: {} ..., case 404: {} ...
default:
break
}
}
}
//MARK: ERROR ON SERVER
else {
var statusCode = -1
if let _response = response.response {
statusCode = _response.statusCode
}
var nsError: NSError = NSError(domain: Constants.UNKNOWN_HTTP_ERROR_MSG,
code: Constants.UNKNOWN_HTTP_ERROR_ID,
userInfo: nil)
if let _error = response.result.error {
nsError = _error as NSError
}
callbackFunctionERROR(statusCode,nsError)
}
}
}
And the error is: "Error Domain=Alamofire.AFError Code=4 "JSON could not be serialized because of error: The data couldn’t be read because it isn’t in the correct format." 400"
The problem is that it does not enter into the "if response.result.isSuccess {" because the result of the response is "nil" and goes directly to the "else". Showing the error that I have commented. Can it be because I have to send the JSON format in the httpBody request? How can I do it?

Answer 1

Your question should be more clear. "What is the problem?" isn't possible to answer without more information.
To issue HTTP request, take a look at Alamofire, an HTTP networking library written in Swift: https://github.com/Alamofire/Alamofire
Alamofire.request("https://httpbin.org/get").responseJSON { response in
print(response.request) // original URL request
print(response.response) // HTTP URL response
print(response.data) // server data
print(response.result) // result of response serialization
if let JSON = response.result.value {
print("JSON: \(JSON)")
}
}