private static void WriteFileToDb(ZipInputStream fileFromMemory)
{
MemoryStream unzippedFileMemoryStream = new MemoryStream();
byte[] buffer = new byte[4096];
using (unzippedFileMemoryStream)
{
StreamUtils.Copy(fileFromMemory, unzippedFileMemoryStream, buffer);
using (var sr = new StreamReader(unzippedFileMemoryStream, System.Text.Encoding.UTF8))
{
unzippedFileMemoryStream.Seek(0, SeekOrigin.Begin);
string fileContent = sr.ReadToEnd();
using (var context = new FileEntryContext())
{
context.FileEntries.Add(new FileEntry()
{
Content = fileContent
});
context.SaveChanges();
}
}
}
}
public override bool CanPreview(FileEntryContext entry)
{
var fn = entry.Name;
return(fn.EndsWith(".jpg") || fn.EndsWith(".jpeg") || fn.EndsWith(".png") ||
fn.EndsWith(".gif"));
}
public UploadController(ILogger <UploadController> logger, FileEntryContext context)
{
_logger = logger;
_context = context;
if (_context.FileEntryItems.Count() == 0)
{
_logger.LogWarning("DbSets are empty", "");
}
}
public static string Map(FileEntryContext ctx)
{
var ext = Path.GetExtension(ctx.Name).ToLowerInvariant().TrimStart('.');
if (string.IsNullOrWhiteSpace(ext) || !map.ContainsKey(ext))
{
return("file-o");
}
return(map[ext]);
}
private async Task <string> PreviewImageDataForAsync(FileEntryContext context)
{
var cacheKey = $"{context.FolderId}-{context.Path}-{context.Name}";
return(await _cache.GetAsync(cacheKey, async cacheContext =>
{
var path =
(await _fileFetcher.GetFileToDownloadAsync(context.FolderId,
Path.Combine(context.Path, context.Name)))
.FullName;
var imageByteData = Resize(path);
//TODO scale && cache
var imageBase64Data = Convert.ToBase64String(imageByteData);
return string.Format("data:image/png;base64,{0}", imageBase64Data);
}, TimeSpan.FromMinutes(10)));
}
public abstract bool CanPreview(FileEntryContext entry);
