192 lines
6.5 KiB
C#
192 lines
6.5 KiB
C#
namespace ASC.Core.ChunkedUploader;
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public class CommonChunkedUploadSessionHolder
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{
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public IDataStore DataStore { get; set; }
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public static readonly TimeSpan SlidingExpiration = TimeSpan.FromHours(12);
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private readonly TempPath _tempPath;
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private readonly IOptionsMonitor<ILog> _option;
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private readonly string _domain;
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private readonly long _maxChunkUploadSize;
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private const string StoragePath = "sessions";
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public CommonChunkedUploadSessionHolder(
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TempPath tempPath,
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IOptionsMonitor<ILog> option,
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IDataStore dataStore,
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string domain,
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long maxChunkUploadSize = 10 * 1024 * 1024)
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{
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_tempPath = tempPath;
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_option = option;
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DataStore = dataStore;
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_domain = domain;
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_maxChunkUploadSize = maxChunkUploadSize;
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}
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public async Task DeleteExpiredAsync()
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{
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// clear old sessions
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try
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{
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await DataStore.DeleteExpiredAsync(_domain, StoragePath, SlidingExpiration);
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}
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catch (Exception err)
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{
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_option.CurrentValue.Error(err);
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}
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}
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public async Task StoreAsync(CommonChunkedUploadSession s)
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{
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using var stream = s.Serialize();
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await DataStore.SavePrivateAsync(_domain, GetPathWithId(s.Id), stream, s.Expired);
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}
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public async Task RemoveAsync(CommonChunkedUploadSession s)
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{
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await DataStore.DeleteAsync(_domain, GetPathWithId(s.Id));
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}
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public Task<Stream> GetStreamAsync(string sessionId)
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{
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return DataStore.GetReadStreamAsync(_domain, GetPathWithId(sessionId));
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}
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public Task InitAsync(CommonChunkedUploadSession chunkedUploadSession)
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{
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if (chunkedUploadSession.BytesTotal < _maxChunkUploadSize)
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{
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chunkedUploadSession.UseChunks = false;
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return Task.CompletedTask;
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}
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return internalInitAsync(chunkedUploadSession);
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}
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private async Task internalInitAsync(CommonChunkedUploadSession chunkedUploadSession)
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{
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var tempPath = Guid.NewGuid().ToString();
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var uploadId = await DataStore.InitiateChunkedUploadAsync(_domain, tempPath);
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chunkedUploadSession.TempPath = tempPath;
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chunkedUploadSession.UploadId = uploadId;
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}
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public async Task FinalizeAsync(CommonChunkedUploadSession uploadSession)
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{
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var tempPath = uploadSession.TempPath;
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var uploadId = uploadSession.UploadId;
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var eTags = uploadSession.GetItemOrDefault<List<string>>("ETag")
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.Select((x, i) => new KeyValuePair<int, string>(i + 1, x))
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.ToDictionary(x => x.Key, x => x.Value);
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await DataStore.FinalizeChunkedUploadAsync(_domain, tempPath, uploadId, eTags);
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}
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public async Task MoveAsync(CommonChunkedUploadSession chunkedUploadSession, string newPath, bool quotaCheckFileSize = true)
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{
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await DataStore.MoveAsync(_domain, chunkedUploadSession.TempPath, string.Empty, newPath, quotaCheckFileSize);
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}
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public async Task AbortAsync(CommonChunkedUploadSession uploadSession)
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{
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if (uploadSession.UseChunks)
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{
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var tempPath = uploadSession.TempPath;
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var uploadId = uploadSession.UploadId;
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await DataStore.AbortChunkedUploadAsync(_domain, tempPath, uploadId);
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}
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else if (!string.IsNullOrEmpty(uploadSession.ChunksBuffer))
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{
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File.Delete(uploadSession.ChunksBuffer);
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}
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}
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public async Task UploadChunkAsync(CommonChunkedUploadSession uploadSession, Stream stream, long length)
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{
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var tempPath = uploadSession.TempPath;
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var uploadId = uploadSession.UploadId;
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var chunkNumber = uploadSession.GetItemOrDefault<int>("ChunksUploaded") + 1;
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var eTag = await DataStore.UploadChunkAsync(_domain, tempPath, uploadId, stream, _maxChunkUploadSize, chunkNumber, length);
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uploadSession.Items["ChunksUploaded"] = chunkNumber;
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uploadSession.BytesUploaded += length;
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var eTags = uploadSession.GetItemOrDefault<List<string>>("ETag") ?? new List<string>();
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eTags.Add(eTag);
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uploadSession.Items["ETag"] = eTags;
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}
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public Stream UploadSingleChunk(CommonChunkedUploadSession uploadSession, Stream stream, long chunkLength)
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{
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if (uploadSession.BytesTotal == 0)
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uploadSession.BytesTotal = chunkLength;
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if (uploadSession.BytesTotal >= chunkLength)
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{
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//This is hack fixing strange behaviour of plupload in flash mode.
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if (string.IsNullOrEmpty(uploadSession.ChunksBuffer))
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{
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uploadSession.ChunksBuffer = _tempPath.GetTempFileName();
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}
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using (var bufferStream = new FileStream(uploadSession.ChunksBuffer, FileMode.Append))
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{
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stream.CopyTo(bufferStream);
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}
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uploadSession.BytesUploaded += chunkLength;
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if (uploadSession.BytesTotal == uploadSession.BytesUploaded)
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{
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return new FileStream(uploadSession.ChunksBuffer, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite,
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4096, FileOptions.DeleteOnClose);
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}
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}
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return Stream.Null;
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}
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public async Task<Stream> UploadSingleChunkAsync(CommonChunkedUploadSession uploadSession, Stream stream, long chunkLength)
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{
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if (uploadSession.BytesTotal == 0)
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uploadSession.BytesTotal = chunkLength;
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if (uploadSession.BytesTotal >= chunkLength)
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{
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//This is hack fixing strange behaviour of plupload in flash mode.
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if (string.IsNullOrEmpty(uploadSession.ChunksBuffer))
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{
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uploadSession.ChunksBuffer = _tempPath.GetTempFileName();
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}
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using (var bufferStream = new FileStream(uploadSession.ChunksBuffer, FileMode.Append))
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{
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await stream.CopyToAsync(bufferStream);
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}
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uploadSession.BytesUploaded += chunkLength;
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if (uploadSession.BytesTotal == uploadSession.BytesUploaded)
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{
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return new FileStream(uploadSession.ChunksBuffer, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite,
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4096, FileOptions.DeleteOnClose);
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}
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}
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return Stream.Null;
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}
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private string GetPathWithId(string id)
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{
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return CrossPlatform.PathCombine(StoragePath, id + ".session");
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}
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}
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