public async Task SaveFileAsAsync(Guid blobFileId, string fileName)
{
List <int> chunks;
using (var context = new FileUploadDemoContext())
chunks = await context.Set <BlobFileChunks>().Where(x => x.BlobFileId == blobFileId).OrderBy(x => x.ChunkId).Select(x => x.ChunkId).ToListAsync();
if (File.Exists(fileName))
{
File.Delete(fileName);
}
using (var file = File.OpenWrite(fileName))
using (var stream = new MultiStream(GetBlobStreams(blobFileId, chunks)))
stream.CopyTo(file);
}
public async Task <string> ProcessFileAsync(Guid blobFileId)
{
List <int> chunks;
using (var context = new FileUploadDemoContext())
chunks = await context.Set <BlobFileChunks>().Where(x => x.BlobFileId == blobFileId).OrderBy(x => x.ChunkId).Select(x => x.ChunkId).ToListAsync();
var result = 0;
using (var stream = new MultiStream(GetBlobStreams(blobFileId, chunks)))
{
foreach (var chunk in stream.GetByteChunks(1024))
{
result = (result * 31) ^ ComputeHash(chunk);
}
}
return(string.Format("File Hash Code is: {0}", result));
}
