public IEnumerator PostAddObject(string url, string bodyJsonString, System.Action <List <string> > callback) { print(bodyJsonString); var request = new UnityWebRequest(url, "POST"); byte[] bodyRaw = Encoding.UTF8.GetBytes(bodyJsonString); request.uploadHandler = (UploadHandler) new UploadHandlerRaw(bodyRaw); request.downloadHandler = (DownloadHandler) new DownloadHandlerBuffer(); request.SetRequestHeader("Content-Type", "application/json"); //yield return request.Send(); yield return(request.SendWebRequest()); Debug.Log("Status Code: " + request.responseCode); //getting the body from call Debug.Log("Add Object Download Handler: " + request.downloadHandler.text); //for cases that backend object detection does not detect any object if (request.downloadHandler.text == "400") { emptyObject.Clear(); emptyObject.Add("NoObjectId"); callback(emptyObject); } else { //for cases that backend can not find the object var data = request.downloadHandler.text; ImageInfo imageInfo = ImageInfo.CreateFromJSON(data); //Debug.Log("House: " + houseInfo.house); callback(imageInfo.objectId); } //Testing no oject senario //emptyObject.Clear(); //emptyObject.Add("NoObjectId"); //callback(emptyObject); }