// Cannot load photo set photos
private void OnPhotoStreamException(object sender, GetPhotoSetPhotosExceptionEventArgs e)
{
Dispatcher.BeginInvoke(() =>
{
if (e.PhotoSetId != PhotoSetSource.ResourceId)
return;
SystemTray.ProgressIndicator.IsVisible = false;
if (PhotoSetSource.Photos.Count == 0)
{
StatusLabel.Text = AppResources.GenericPhotoLoadingErrorText;
StatusLabel.Visibility = Visibility.Visible;
PhotoStreamListView.Visibility = Visibility.Collapsed;
}
});
}
public async void GetPhotoSetPhotosAsync(string setId, Dictionary<string, string> parameters = null)
{
if (setPhotoFetchingQueue.Contains(setId))
return;
setPhotoFetchingQueue.Add(setId);
string timestamp = DateTimeUtils.GetTimestamp();
string nonce = Guid.NewGuid().ToString().Replace("-", null);
Dictionary<string, string> paramDict = new Dictionary<string, string>();
paramDict["method"] = "flickr.photosets.getPhotos";
paramDict["format"] = "json";
paramDict["nojsoncallback"] = "1";
paramDict["oauth_consumer_key"] = consumerKey;
paramDict["oauth_nonce"] = nonce;
paramDict["oauth_signature_method"] = "HMAC-SHA1";
paramDict["oauth_timestamp"] = timestamp;
paramDict["oauth_token"] = AccessToken;
paramDict["oauth_version"] = "1.0";
paramDict["photoset_id"] = setId;
if (parameters != null)
{
foreach (var entry in parameters)
{
paramDict[entry.Key] = entry.Value;
}
}
paramDict["extras"] = UrlHelper.Encode(commonExtraParameters);
string paramString = GenerateParamString(paramDict);
string signature = GenerateSignature("GET", AccessTokenSecret, "https://api.flickr.com/services/rest", paramString);
string requestUrl = "https://api.flickr.com/services/rest?" + paramString + "&oauth_signature=" + signature;
HttpWebResponse response = await DispatchRequest("GET", requestUrl, null).ConfigureAwait(false);
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
if(setPhotoFetchingQueue.Contains(setId))
setPhotoFetchingQueue.Remove(setId);
GetPhotoSetPhotosExceptionEventArgs exceptionEvt = null;
if (response.StatusCode != HttpStatusCode.OK)
{
HandleHTTPException(response);
exceptionEvt = new GetPhotoSetPhotosExceptionEventArgs();
exceptionEvt.PhotoSetId = setId;
PhotoSetPhotosException(this, exceptionEvt);
return;
}
string jsonString = await reader.ReadToEndAsync().ConfigureAwait(false);
if (!TryHandleResponseException(jsonString, () => { GetPhotoSetPhotosAsync(setId, parameters); }))
{
exceptionEvt = new GetPhotoSetPhotosExceptionEventArgs();
exceptionEvt.PhotoSetId = setId;
PhotoSetPhotosException(this, exceptionEvt);
return;
}
GetPhotoSetPhotosEventArgs args = new GetPhotoSetPhotosEventArgs();
args.PhotoSetId = setId;
args.Response = jsonString;
PhotoSetPhotosReturned.DispatchEvent(this, args);
}
}
