UnityWebRequest POST JSON FAIL

• 1) the POST success on POSTMAN
  

• 2) the Code is:

                 UnityWebRequest www = new UnityWebRequest(url, "POST");
           www.chunkedTransfer = false;
           byte[] bodyRaw = Encoding.UTF8.GetBytes(jsonAvance);
           www.uploadHandler = (UploadHandler) new UploadHandlerRaw(bodyRaw);
           www.downloadHandler = (DownloadHandler) new DownloadHandlerBuffer();
           www.SetRequestHeader("Content-Type", "application/json"); 
  
                yield return www.SendWebRequest();
    
                   if (www.isDone) {
                   string jsonResult = www.downloadHandler.text;
  
                                
  
  

• 3) When fail www.downloadHandler.text is ;

Invalid Request error was encountered while trying to process the request:

POST /wsmartenautas/index.php/subir-avance HTTP/1.0 Host: ... User-Agent: UnityPlayer/2017.4.8f1 (UnityWebRequest/1.0, libcurl/7.51.0-DEV) Accept: / Accept-Encoding: identity Content-Type: application/json X-Unity-Version: 2017.4.8f1 Content-Length: 1063 Expect: 100-continue Proxy-Connection: Keep-Alive

Some possible problems are: Missing or unknown request method. Missing URL. Missing HTTP Identifier (HTTP/1.0). Request is too large. Content-Length missing for POST or PUT requests. Illegal character in hostname; underscores are not allowed. HTTP/1.1 Expect: feature is being asked from an HTTP/1.0 software.

• 4) Note the use of HTTP1.0 in POST /wsmartenautas/index.php/subir-avance HTTP/1.0... i don know why unity use HTTP/1.0 must be HTTP/1.1