public static async Task <IRandomAccessStream> GetStreamFromUri(this Uri uri, CancellationToken cancellationToken)
{
switch (uri.Scheme)
{
case "ms-appx":
case "ms-appdata":
{
var file = await StorageFile.GetFileFromApplicationUriAsync(uri);
return(await file.OpenAsync(FileAccessMode.Read).AsTask(cancellationToken).ConfigureAwait(false));
}
case "ms-resource":
{
var rm = ResourceManager.Current;
var context = ResourceContext.GetForCurrentView();
var candidate = rm.MainResourceMap.GetValue(uri.LocalPath, context);
if (candidate != null && candidate.IsMatch)
{
var file = await candidate.GetValueAsFileAsync();
return(await file.OpenAsync(FileAccessMode.Read).AsTask(cancellationToken).ConfigureAwait(false));
}
throw new Exception("Resource not found");
}
case "file":
{
var file = await StorageFile.GetFileFromPathAsync(uri.LocalPath);
return(await file.OpenAsync(FileAccessMode.Read).AsTask(cancellationToken).ConfigureAwait(false));
}
default:
{
try
{
RandomAccessStreamReference streamRef = RandomAccessStreamReference.CreateFromUri(uri);
return(await streamRef.OpenReadAsync().AsTask(cancellationToken).ConfigureAwait(false));
}
catch (Exception ex)
{
try
{
AsyncHttpClient httpClient = new AsyncHttpClient();
var rsp = await httpClient.Uri(uri).Get();
return(await rsp.GetRandomStream());
}
catch (Exception hex)
{
return(null);
}
}
}
}
}