// Base function to made a request.
private IEnumerator GetRequest(string uri, System.Action<BackendRequestResult> responseCallback)
{
BackendRequestResult result = new BackendRequestResult();
using (UnityWebRequest webRequest = UnityWebRequest.Get(uri))
{
// Request and wait for the desired page.
yield return webRequest.SendWebRequest();
if (!webRequest.isNetworkError && webRequest.responseCode == 200)
{
string responseStr = System.Text.Encoding.UTF8.GetString(webRequest.downloadHandler.data);
result.Success = true;
result.ResponseString = responseStr;
result.ResponseBytes = webRequest.downloadHandler.data;
if (responseCallback != null)
{
responseCallback(result);
}
}
else
{
result.Success = false;
result.ResponseString = "";
result.ErrorString = "GetRequest -> Something went wrong while doing a Get Request";
if (responseCallback != null)
{
responseCallback(result);
}
}
}
}
// Download a file directly to the folder streaming assets.
public void DownloadFile(string uri, System.Action<BackendRequestResult,string> resultCallback = null)
{
var lastSlash = uri.LastIndexOf('/');
if(lastSlash==-1)
{
BackendRequestResult result = new BackendRequestResult();
result.ErrorString = "Invalid input uri string";
result.Success = false;
if (resultCallback != null)
{
resultCallback(result, "");
}
}
string filePath = Application.streamingAssetsPath + uri.Substring(lastSlash);
StartCoroutine(GetRequest(uri, (BackendRequestResult result) =>
{
if (result.Success)
{
try
{
// Ensure Download Folder Path exists
Directory.CreateDirectory(Application.streamingAssetsPath);
// Write file to disk
using (var fs = new FileStream(filePath, FileMode.Create, FileAccess.Write))
{
fs.Write(result.ResponseBytes, 0, result.ResponseBytes.Length);
}
}
catch (Exception ex)
{
result.ErrorString = "Backend request succeeded of but the system were unable to write the file to disk. Reason: "+ ex.Message;
result.Success = false;
}
}
if (resultCallback != null)
{
resultCallback(result, filePath);
}
}));
}