/// <inheritdoc />
public override async Task InvokeAsync(ILoadingContext <TSource> context, LoadingPipeDelegate <TSource> next, CancellationToken cancellationToken = default)
{
if (IsInDesignMode)
{
await next(context, cancellationToken);
return;
}
var uri = context.Current as Uri;
if (uri == null || !uri.IsHttp())
{
await next(context, cancellationToken);
return;
}
var cacheKey = uri.AbsoluteUri;
if (await _diskCache.IsExistAsync(cacheKey))
{
context.Current = await _diskCache.GetStreamAsync(cacheKey, cancellationToken);
try
{
await next(context, cancellationToken);
}
catch
{
_diskCache.DeleteAsync(cacheKey).Ignore();
throw;
}
}
else
{
await next(context, cancellationToken);
var bytes = context.HttpResponseBytes;
if (bytes != null)
{
_diskCache.SetAsync(cacheKey, bytes, CancellationToken.None).Ignore();
}
}
}