root / trunk / Pithos.Core / Agents / NetworkAgent.cs @ 039d89ea
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// ----------------------------------------------------------------------- |
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// <copyright file="NetworkAgent.cs" company="GRNET"> |
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// Copyright 2011-2012 GRNET S.A. All rights reserved. |
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// |
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// Redistribution and use in source and binary forms, with or |
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// without modification, are permitted provided that the following |
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// conditions are met: |
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// |
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// 1. Redistributions of source code must retain the above |
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// copyright notice, this list of conditions and the following |
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// disclaimer. |
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// |
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// 2. Redistributions in binary form must reproduce the above |
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// copyright notice, this list of conditions and the following |
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// disclaimer in the documentation and/or other materials |
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// provided with the distribution. |
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// |
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// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS |
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// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR |
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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// POSSIBILITY OF SUCH DAMAGE. |
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// |
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// The views and conclusions contained in the software and |
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// documentation are those of the authors and should not be |
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// interpreted as representing official policies, either expressed |
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// or implied, of GRNET S.A. |
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// </copyright> |
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// ----------------------------------------------------------------------- |
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|
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using System; |
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using System.Collections.Concurrent; |
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using System.Collections.Generic; |
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using System.ComponentModel.Composition; |
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using System.Diagnostics; |
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using System.Diagnostics.Contracts; |
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using System.IO; |
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using System.Linq; |
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using System.Net; |
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using System.Threading; |
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using System.Threading.Tasks; |
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using System.Threading.Tasks.Dataflow; |
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using Castle.ActiveRecord; |
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using Pithos.Interfaces; |
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using Pithos.Network; |
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using log4net; |
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|
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namespace Pithos.Core.Agents |
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{ |
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//TODO: Ensure all network operations use exact casing. Pithos is case sensitive |
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[Export] |
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public class NetworkAgent |
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{ |
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private Agent<CloudAction> _agent; |
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|
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//A separate agent is used to execute delete actions immediatelly; |
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private ActionBlock<CloudDeleteAction> _deleteAgent; |
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readonly ConcurrentDictionary<string,DateTime> _deletedFiles=new ConcurrentDictionary<string, DateTime>(); |
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|
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|
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private readonly ManualResetEventSlim _pauseAgent = new ManualResetEventSlim(true); |
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|
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[System.ComponentModel.Composition.Import] |
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public IStatusKeeper StatusKeeper { get; set; } |
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|
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public IStatusNotification StatusNotification { get; set; } |
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|
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private static readonly ILog Log = LogManager.GetLogger("NetworkAgent"); |
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|
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private readonly ConcurrentBag<AccountInfo> _accounts = new ConcurrentBag<AccountInfo>(); |
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|
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[System.ComponentModel.Composition.Import] |
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public IPithosSettings Settings { get; set; } |
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|
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private bool _firstPoll = true; |
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private TaskCompletionSource<bool> _tcs; |
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private ConcurrentDictionary<string,DateTime> _lastSeen=new ConcurrentDictionary<string, DateTime>(); |
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|
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public void Start() |
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{ |
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_firstPoll = true; |
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_agent = Agent<CloudAction>.Start(inbox => |
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{ |
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Action loop = null; |
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loop = () => |
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{ |
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_pauseAgent.Wait(); |
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var message = inbox.Receive(); |
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var process=message.Then(Process,inbox.CancellationToken); |
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inbox.LoopAsync(process, loop); |
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}; |
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loop(); |
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}); |
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|
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_deleteAgent = new ActionBlock<CloudDeleteAction>(message =>ProcessDelete(message),new ExecutionDataflowBlockOptions{MaxDegreeOfParallelism=4}); |
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/* |
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Action loop = null; |
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loop = () => |
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{ |
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var message = inbox.Receive(); |
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var process = message.Then(ProcessDelete,inbox.CancellationToken); |
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inbox.LoopAsync(process, loop); |
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}; |
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loop(); |
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*/ |
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|
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} |
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|
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private async Task Process(CloudAction action) |
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{ |
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if (action == null) |
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throw new ArgumentNullException("action"); |
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if (action.AccountInfo==null) |
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throw new ArgumentException("The action.AccountInfo is empty","action"); |
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Contract.EndContractBlock(); |
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|
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UpdateStatus(PithosStatus.Syncing); |
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var accountInfo = action.AccountInfo; |
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|
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using (log4net.ThreadContext.Stacks["NETWORK"].Push("PROCESS")) |
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{ |
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Log.InfoFormat("[ACTION] Start Processing {0}", action); |
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|
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var cloudFile = action.CloudFile; |
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var downloadPath = action.GetDownloadPath(); |
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|
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try |
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{ |
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if (action.Action == CloudActionType.DeleteCloud) |
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{ |
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//Redirect deletes to the delete agent |
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_deleteAgent.Post((CloudDeleteAction)action); |
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} |
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if (IsDeletedFile(action)) |
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{ |
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//Clear the status of already deleted files to avoid reprocessing |
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if (action.LocalFile != null) |
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this.StatusKeeper.ClearFileStatus(action.LocalFile.FullName); |
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} |
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else |
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{ |
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switch (action.Action) |
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{ |
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case CloudActionType.UploadUnconditional: |
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//Abort if the file was deleted before we reached this point |
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await UploadCloudFile(action); |
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break; |
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case CloudActionType.DownloadUnconditional: |
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await DownloadCloudFile(accountInfo, cloudFile, downloadPath); |
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break; |
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case CloudActionType.RenameCloud: |
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var moveAction = (CloudMoveAction)action; |
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RenameCloudFile(accountInfo, moveAction); |
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break; |
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case CloudActionType.MustSynch: |
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if (!File.Exists(downloadPath) && !Directory.Exists(downloadPath)) |
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{ |
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await DownloadCloudFile(accountInfo, cloudFile, downloadPath); |
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} |
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else |
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{ |
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await SyncFiles(accountInfo, action); |
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} |
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break; |
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} |
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} |
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Log.InfoFormat("[ACTION] End Processing {0}:{1}->{2}", action.Action, action.LocalFile, |
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action.CloudFile.Name); |
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} |
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catch (WebException exc) |
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{ |
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Log.ErrorFormat("[WEB ERROR] {0} : {1} -> {2} due to exception\r\n{3}", action.Action, action.LocalFile, action.CloudFile, exc); |
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} |
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catch (OperationCanceledException) |
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{ |
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throw; |
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} |
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catch (DirectoryNotFoundException) |
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{ |
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Log.ErrorFormat("{0} : {1} -> {2} failed because the directory was not found.\n Rescheduling a delete", |
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action.Action, action.LocalFile, action.CloudFile); |
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//Post a delete action for the missing file |
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Post(new CloudDeleteAction(action)); |
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} |
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catch (FileNotFoundException) |
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{ |
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Log.ErrorFormat("{0} : {1} -> {2} failed because the file was not found.\n Rescheduling a delete", |
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action.Action, action.LocalFile, action.CloudFile); |
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//Post a delete action for the missing file |
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Post(new CloudDeleteAction(action)); |
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} |
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catch (Exception exc) |
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{ |
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Log.ErrorFormat("[REQUEUE] {0} : {1} -> {2} due to exception\r\n{3}", |
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action.Action, action.LocalFile, action.CloudFile, exc); |
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|
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_agent.Post(action); |
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} |
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finally |
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{ |
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UpdateStatus(PithosStatus.InSynch); |
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} |
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} |
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} |
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|
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private void UpdateStatus(PithosStatus status) |
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{ |
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StatusKeeper.SetPithosStatus(status); |
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StatusNotification.Notify(new Notification()); |
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} |
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|
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/// <summary> |
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/// Processes cloud delete actions |
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/// </summary> |
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/// <param name="action">The delete action to execute</param> |
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/// <returns></returns> |
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/// <remarks> |
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/// When a file/folder is deleted locally, we must delete it ASAP from the server and block any download |
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/// operations that may be in progress. |
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/// <para> |
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/// A separate agent is used to process deletes because the main agent may be busy with a long operation. |
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/// </para> |
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/// </remarks> |
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private async Task ProcessDelete(CloudDeleteAction action) |
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{ |
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if (action == null) |
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throw new ArgumentNullException("action"); |
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if (action.AccountInfo==null) |
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throw new ArgumentException("The action.AccountInfo is empty","action"); |
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Contract.EndContractBlock(); |
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|
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var accountInfo = action.AccountInfo; |
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|
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using (log4net.ThreadContext.Stacks["NETWORK"].Push("PROCESS")) |
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{ |
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Log.InfoFormat("[ACTION] Start Processing {0}", action); |
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|
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var cloudFile = action.CloudFile; |
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|
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try |
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{ |
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//Acquire a lock on the deleted file to prevent uploading/downloading operations from the normal |
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//agent |
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using (var gate = NetworkGate.Acquire(action.LocalFile.FullName, NetworkOperation.Deleting)) |
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{ |
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|
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//Add the file URL to the deleted files list |
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var key = GetFileKey(action.CloudFile); |
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_deletedFiles[key] = DateTime.Now; |
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|
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_pauseAgent.Reset(); |
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// and then delete the file from the server |
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DeleteCloudFile(accountInfo, cloudFile); |
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|
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Log.InfoFormat("[ACTION] End Delete {0}:{1}->{2}", action.Action, action.LocalFile, |
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action.CloudFile.Name); |
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} |
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} |
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catch (WebException exc) |
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{ |
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Log.ErrorFormat("[WEB ERROR] {0} : {1} -> {2} due to exception\r\n{3}", action.Action, action.LocalFile, action.CloudFile, exc); |
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} |
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catch (OperationCanceledException) |
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{ |
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throw; |
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} |
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catch (DirectoryNotFoundException) |
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{ |
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Log.ErrorFormat("{0} : {1} -> {2} failed because the directory was not found.\n Rescheduling a delete", |
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action.Action, action.LocalFile, action.CloudFile); |
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//Repost a delete action for the missing file |
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_deleteAgent.Post(action); |
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} |
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catch (FileNotFoundException) |
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{ |
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Log.ErrorFormat("{0} : {1} -> {2} failed because the file was not found.\n Rescheduling a delete", |
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action.Action, action.LocalFile, action.CloudFile); |
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//Post a delete action for the missing file |
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_deleteAgent.Post(action); |
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} |
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catch (Exception exc) |
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{ |
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Log.ErrorFormat("[REQUEUE] {0} : {1} -> {2} due to exception\r\n{3}", |
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action.Action, action.LocalFile, action.CloudFile, exc); |
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|
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_deleteAgent.Post(action); |
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} |
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finally |
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{ |
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//Set the event when all delete actions are processed |
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if (_deleteAgent.InputCount == 0) |
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_pauseAgent.Set(); |
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|
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} |
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} |
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} |
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|
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private static string GetFileKey(ObjectInfo info) |
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{ |
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var key = String.Format("{0}/{1}/{2}", info.Account, info.Container,info.Name); |
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return key; |
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} |
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|
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private async Task SyncFiles(AccountInfo accountInfo,CloudAction action) |
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{ |
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if (accountInfo == null) |
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throw new ArgumentNullException("accountInfo"); |
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if (action==null) |
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throw new ArgumentNullException("action"); |
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if (action.LocalFile==null) |
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throw new ArgumentException("The action's local file is not specified","action"); |
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if (!Path.IsPathRooted(action.LocalFile.FullName)) |
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throw new ArgumentException("The action's local file path must be absolute","action"); |
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if (action.CloudFile== null) |
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throw new ArgumentException("The action's cloud file is not specified", "action"); |
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Contract.EndContractBlock(); |
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|
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var localFile = action.LocalFile; |
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var cloudFile = action.CloudFile; |
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var downloadPath=action.LocalFile.GetProperCapitalization(); |
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|
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var cloudHash = cloudFile.Hash.ToLower(); |
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var localHash = action.LocalHash.Value.ToLower(); |
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var topHash = action.TopHash.Value.ToLower(); |
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|
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//Not enough to compare only the local hashes, also have to compare the tophashes |
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|
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//If any of the hashes match, we are done |
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if ((cloudHash == localHash || cloudHash == topHash)) |
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{ |
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Log.InfoFormat("Skipping {0}, hashes match",downloadPath); |
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return; |
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} |
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|
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//The hashes DON'T match. We need to sync |
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var lastLocalTime = localFile.LastWriteTime; |
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var lastUpTime = cloudFile.Last_Modified; |
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|
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//If the local file is newer upload it |
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if (lastUpTime <= lastLocalTime) |
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{ |
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//It probably means it was changed while the app was down |
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UploadCloudFile(action); |
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} |
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else |
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{ |
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//It the cloud file has a later date, it was modified by another user or computer. |
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//We need to check the local file's status |
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var status = StatusKeeper.GetFileStatus(downloadPath); |
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switch (status) |
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{ |
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case FileStatus.Unchanged: |
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//If the local file's status is Unchanged, we can go on and download the newer cloud file |
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await DownloadCloudFile(accountInfo,cloudFile,downloadPath); |
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break; |
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case FileStatus.Modified: |
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//If the local file is Modified, we may have a conflict. In this case we should mark the file as Conflict |
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//We can't ensure that a file modified online since the last time will appear as Modified, unless we |
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//index all files before we start listening. |
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case FileStatus.Created: |
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//If the local file is Created, it means that the local and cloud files aren't related, |
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// yet they have the same name. |
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|
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//In both cases we must mark the file as in conflict |
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ReportConflict(downloadPath); |
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break; |
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default: |
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//Other cases should never occur. Mark them as Conflict as well but log a warning |
376 |
ReportConflict(downloadPath); |
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Log.WarnFormat("Unexcepted status {0} for file {1}->{2}", status, |
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downloadPath, action.CloudFile.Name); |
379 |
break; |
380 |
} |
381 |
} |
382 |
} |
383 |
|
384 |
private void ReportConflict(string downloadPath) |
385 |
{ |
386 |
if (String.IsNullOrWhiteSpace(downloadPath)) |
387 |
throw new ArgumentNullException("downloadPath"); |
388 |
Contract.EndContractBlock(); |
389 |
|
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StatusKeeper.SetFileOverlayStatus(downloadPath, FileOverlayStatus.Conflict); |
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UpdateStatus(PithosStatus.HasConflicts); |
392 |
var message = String.Format("Conflict detected for file {0}", downloadPath); |
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Log.Warn(message); |
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StatusNotification.NotifyChange(message, TraceLevel.Warning); |
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} |
396 |
|
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public void Post(CloudAction cloudAction) |
398 |
{ |
399 |
if (cloudAction == null) |
400 |
throw new ArgumentNullException("cloudAction"); |
401 |
if (cloudAction.AccountInfo==null) |
402 |
throw new ArgumentException("The CloudAction.AccountInfo is empty","cloudAction"); |
403 |
Contract.EndContractBlock(); |
404 |
|
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_pauseAgent.Wait(); |
406 |
|
407 |
//If the action targets a local file, add a treehash calculation |
408 |
if (!(cloudAction is CloudDeleteAction) && cloudAction.LocalFile as FileInfo != null) |
409 |
{ |
410 |
var accountInfo = cloudAction.AccountInfo; |
411 |
var localFile = (FileInfo) cloudAction.LocalFile; |
412 |
if (localFile.Length > accountInfo.BlockSize) |
413 |
cloudAction.TopHash = |
414 |
new Lazy<string>(() => Signature.CalculateTreeHashAsync(localFile, |
415 |
accountInfo.BlockSize, |
416 |
accountInfo.BlockHash).Result |
417 |
.TopHash.ToHashString()); |
418 |
else |
419 |
{ |
420 |
cloudAction.TopHash = new Lazy<string>(() => cloudAction.LocalHash.Value); |
421 |
} |
422 |
} |
423 |
else |
424 |
{ |
425 |
//The hash for a directory is the empty string |
426 |
cloudAction.TopHash = new Lazy<string>(() => String.Empty); |
427 |
} |
428 |
|
429 |
if (cloudAction is CloudDeleteAction) |
430 |
_deleteAgent.Post((CloudDeleteAction)cloudAction); |
431 |
else |
432 |
_agent.Post(cloudAction); |
433 |
} |
434 |
|
435 |
/* class ObjectInfoByNameComparer:IEqualityComparer<ObjectInfo> |
436 |
{ |
437 |
public bool Equals(ObjectInfo x, ObjectInfo y) |
438 |
{ |
439 |
return x.Name.Equals(y.Name,StringComparison.InvariantCultureIgnoreCase); |
440 |
} |
441 |
|
442 |
public int GetHashCode(ObjectInfo obj) |
443 |
{ |
444 |
return obj.Name.ToLower().GetHashCode(); |
445 |
} |
446 |
}*/ |
447 |
|
448 |
public void SynchNow() |
449 |
{ |
450 |
if (_tcs!=null) |
451 |
_tcs.TrySetResult(true); |
452 |
else |
453 |
{ |
454 |
//TODO: This may be OK for testing purposes, but we have no guarantee that it will |
455 |
//work properly in production |
456 |
PollRemoteFiles(repeat:false); |
457 |
} |
458 |
} |
459 |
|
460 |
//Remote files are polled periodically. Any changes are processed |
461 |
public async Task PollRemoteFiles(DateTime? since = null,bool repeat=true) |
462 |
{ |
463 |
UpdateStatus(PithosStatus.Syncing); |
464 |
StatusNotification.Notify(new PollNotification()); |
465 |
|
466 |
using (log4net.ThreadContext.Stacks["Retrieve Remote"].Push("All accounts")) |
467 |
{ |
468 |
//If this poll fails, we will retry with the same since value |
469 |
var nextSince = since; |
470 |
try |
471 |
{ |
472 |
//Next time we will check for all changes since the current check minus 1 second |
473 |
//This is done to ensure there are no discrepancies due to clock differences |
474 |
DateTime current = DateTime.Now.AddSeconds(-1); |
475 |
|
476 |
var tasks = from accountInfo in _accounts |
477 |
select ProcessAccountFiles(accountInfo, since); |
478 |
|
479 |
await TaskEx.WhenAll(tasks.ToList()); |
480 |
|
481 |
_firstPoll = false; |
482 |
//Reschedule the poll with the current timestamp as a "since" value |
483 |
if (repeat) |
484 |
nextSince = current; |
485 |
else |
486 |
return; |
487 |
} |
488 |
catch (Exception ex) |
489 |
{ |
490 |
Log.ErrorFormat("Error while processing accounts\r\n{0}",ex); |
491 |
//In case of failure retry with the same "since" value |
492 |
} |
493 |
|
494 |
UpdateStatus(PithosStatus.InSynch); |
495 |
//Wait for the polling interval to pass or the Manual flat to be toggled |
496 |
nextSince = await WaitForScheduledOrManualPoll(nextSince); |
497 |
|
498 |
PollRemoteFiles(nextSince); |
499 |
|
500 |
} |
501 |
} |
502 |
|
503 |
private async Task<DateTime?> WaitForScheduledOrManualPoll(DateTime? since) |
504 |
{ |
505 |
_tcs = new TaskCompletionSource<bool>(); |
506 |
var wait = TaskEx.Delay(TimeSpan.FromSeconds(Settings.PollingInterval), _agent.CancellationToken); |
507 |
var signaledTask = await TaskEx.WhenAny(_tcs.Task, wait); |
508 |
//If polling is signalled by SynchNow, ignore the since tag |
509 |
if (signaledTask is Task<bool>) |
510 |
return null; |
511 |
return since; |
512 |
} |
513 |
|
514 |
public async Task ProcessAccountFiles(AccountInfo accountInfo,DateTime? since=null) |
515 |
{ |
516 |
if (accountInfo==null) |
517 |
throw new ArgumentNullException("accountInfo"); |
518 |
if (String.IsNullOrWhiteSpace(accountInfo.AccountPath)) |
519 |
throw new ArgumentException("The AccountInfo.AccountPath is empty","accountInfo"); |
520 |
Contract.EndContractBlock(); |
521 |
|
522 |
|
523 |
using (log4net.ThreadContext.Stacks["Retrieve Remote"].Push(accountInfo.UserName)) |
524 |
{ |
525 |
_pauseAgent.Wait(); |
526 |
|
527 |
Log.Info("Scheduled"); |
528 |
var client=new CloudFilesClient(accountInfo); |
529 |
|
530 |
var containers = client.ListContainers(accountInfo.UserName); |
531 |
|
532 |
|
533 |
CreateContainerFolders(accountInfo, containers); |
534 |
|
535 |
try |
536 |
{ |
537 |
_pauseAgent.Wait(); |
538 |
//Get the poll time now. We may miss some deletions but it's better to keep a file that was deleted |
539 |
//than delete a file that was created while we were executing the poll |
540 |
var pollTime = DateTime.Now; |
541 |
|
542 |
//Get the list of server objects changed since the last check |
543 |
//The name of the container is passed as state in order to create a dictionary of tasks in a subsequent step |
544 |
var listObjects = (from container in containers |
545 |
select Task<IList<ObjectInfo>>.Factory.StartNew(_ => |
546 |
client.ListObjects(accountInfo.UserName,container.Name, since),container.Name)).ToList(); |
547 |
|
548 |
var listShared = Task<IList<ObjectInfo>>.Factory.StartNew(_ => client.ListSharedObjects(since), "shared"); |
549 |
listObjects.Add(listShared); |
550 |
var listTasks = await Task.Factory.WhenAll(listObjects.ToArray()); |
551 |
|
552 |
using (log4net.ThreadContext.Stacks["SCHEDULE"].Push("Process Results")) |
553 |
{ |
554 |
var dict = listTasks.ToDictionary(t => t.AsyncState); |
555 |
|
556 |
//Get all non-trash objects. Remember, the container name is stored in AsyncState |
557 |
var remoteObjects = from objectList in listTasks |
558 |
where (string) objectList.AsyncState != "trash" |
559 |
from obj in objectList.Result |
560 |
select obj; |
561 |
|
562 |
//TODO: Change the way deleted objects are detected. |
563 |
//The list operation returns all existing objects so we could detect deleted remote objects |
564 |
//by detecting objects that exist only locally. There are several cases where this is NOT the case: |
565 |
//1. The first time the application runs, as there may be files that were added while |
566 |
// the application was down. |
567 |
//2. An object that is currently being uploaded will not appear in the remote list |
568 |
// until the upload finishes. |
569 |
// SOLUTION 1: Check the upload/download queue for the file |
570 |
// SOLUTION 2: Check the SQLite states for the file's entry. If it is being uploaded, |
571 |
// or its last modification was after the current poll, don't delete it. This way we don't |
572 |
// delete objects whose upload finished too late to be included in the list. |
573 |
//We need to detect and protect against such situations |
574 |
//TODO: Does FileState have a LastModification field? |
575 |
//TODO: How do we update the LastModification field? Do we need to add SQLite triggers? |
576 |
// Do we need to use a proper SQLite schema? |
577 |
// We can create a trigger with |
578 |
// CREATE TRIGGER IF NOT EXISTS update_last_modified UPDATE ON FileState FOR EACH ROW |
579 |
// BEGIN |
580 |
// UPDATE FileState SET LastModification=datetime('now') WHERE Id=old.Id; |
581 |
// END; |
582 |
// |
583 |
//NOTE: Some files may have been deleted remotely while the application was down. |
584 |
// We DO have to delete those files. Checking the trash makes it easy to detect them, |
585 |
// Otherwise, we can't be really sure whether we need to upload or delete |
586 |
// the local-only files. |
587 |
// SOLUTION 1: Ask the user when such a local-only file is detected during the first poll. |
588 |
// SOLUTION 2: Mark conflict and ask the user as in #1 |
589 |
|
590 |
var trashObjects = dict["trash"].Result; |
591 |
var sharedObjects = dict["shared"].Result; |
592 |
|
593 |
//Items with the same name, hash may be both in the container and the trash |
594 |
//Don't delete items that exist in the container |
595 |
var realTrash = from trash in trashObjects |
596 |
where |
597 |
!remoteObjects.Any( |
598 |
info => info.Name == trash.Name && info.Hash == trash.Hash) |
599 |
select trash; |
600 |
ProcessTrashedFiles(accountInfo, realTrash); |
601 |
|
602 |
|
603 |
var cleanRemotes = (from info in remoteObjects.Union(sharedObjects) |
604 |
let name = info.Name |
605 |
where !name.EndsWith(".ignore", StringComparison.InvariantCultureIgnoreCase) && |
606 |
!name.StartsWith(FolderConstants.CacheFolder + "/", |
607 |
StringComparison.InvariantCultureIgnoreCase) |
608 |
select info).ToList(); |
609 |
|
610 |
|
611 |
|
612 |
ProcessDeletedFiles(accountInfo, cleanRemotes, pollTime); |
613 |
|
614 |
//Create a list of actions from the remote files |
615 |
var allActions = ObjectsToActions(accountInfo, cleanRemotes); |
616 |
|
617 |
|
618 |
//var relativePath = objectInfo.RelativeUrlToFilePath(accountInfo.UserName); |
619 |
|
620 |
//And remove those that are already being processed by the agent |
621 |
var distinctActions = allActions |
622 |
.Except(_agent.GetEnumerable(), new PithosMonitor.LocalFileComparer()) |
623 |
.ToList(); |
624 |
|
625 |
//Queue all the actions |
626 |
foreach (var message in distinctActions) |
627 |
{ |
628 |
Post(message); |
629 |
} |
630 |
|
631 |
Log.Info("[LISTENER] End Processing"); |
632 |
} |
633 |
} |
634 |
catch (Exception ex) |
635 |
{ |
636 |
Log.ErrorFormat("[FAIL] ListObjects for{0} in ProcessRemoteFiles with {1}", accountInfo.UserName, ex); |
637 |
return; |
638 |
} |
639 |
|
640 |
Log.Info("[LISTENER] Finished"); |
641 |
|
642 |
} |
643 |
} |
644 |
|
645 |
|
646 |
Dictionary<string, List<ObjectInfo>> _currentSnapshot = new Dictionary<string, List<ObjectInfo>>(); |
647 |
Dictionary<string, List<ObjectInfo>> _previousSnapshot = new Dictionary<string, List<ObjectInfo>>(); |
648 |
|
649 |
/// <summary> |
650 |
/// Deletes local files that are not found in the list of cloud files |
651 |
/// </summary> |
652 |
/// <param name="accountInfo"></param> |
653 |
/// <param name="cloudFiles"></param> |
654 |
/// <param name="pollTime"></param> |
655 |
private void ProcessDeletedFiles(AccountInfo accountInfo, IEnumerable<ObjectInfo> cloudFiles, DateTime pollTime) |
656 |
{ |
657 |
if (accountInfo == null) |
658 |
throw new ArgumentNullException("accountInfo"); |
659 |
if (String.IsNullOrWhiteSpace(accountInfo.AccountPath)) |
660 |
throw new ArgumentException("The AccountInfo.AccountPath is empty", "accountInfo"); |
661 |
if (cloudFiles == null) |
662 |
throw new ArgumentNullException("cloudFiles"); |
663 |
Contract.EndContractBlock(); |
664 |
|
665 |
if (_previousSnapshot.ContainsKey(accountInfo.UserName) && _currentSnapshot.ContainsKey(accountInfo.UserName)) |
666 |
_previousSnapshot[accountInfo.UserName] = _currentSnapshot[accountInfo.UserName] ?? new List<ObjectInfo>(); |
667 |
else |
668 |
{ |
669 |
_previousSnapshot[accountInfo.UserName]=new List<ObjectInfo>(); |
670 |
} |
671 |
|
672 |
_currentSnapshot[accountInfo.UserName] = cloudFiles.ToList(); |
673 |
|
674 |
var deletedObjects = _previousSnapshot[accountInfo.UserName].Except(_currentSnapshot[accountInfo.UserName], new ObjectInfoComparer()).ToList(); |
675 |
|
676 |
|
677 |
//On the first run |
678 |
if (_firstPoll) |
679 |
{ |
680 |
//Only consider files that are not being modified, ie they are in the Unchanged state |
681 |
var deleteCandidates = FileState.Queryable.Where(state => |
682 |
state.FilePath.StartsWith(accountInfo.AccountPath) |
683 |
&& state.FileStatus == FileStatus.Unchanged).ToList(); |
684 |
|
685 |
|
686 |
//TODO: filesToDelete must take into account the Others container |
687 |
var filesToDelete = (from deleteCandidate in deleteCandidates |
688 |
let localFile = FileInfoExtensions.FromPath(deleteCandidate.FilePath) |
689 |
let relativeFilePath = localFile.AsRelativeTo(accountInfo.AccountPath) |
690 |
where |
691 |
!cloudFiles.Any(r => r.RelativeUrlToFilePath(accountInfo.UserName) == relativeFilePath) |
692 |
select localFile).ToList(); |
693 |
|
694 |
|
695 |
|
696 |
//Set the status of missing files to Conflict |
697 |
foreach (var item in filesToDelete) |
698 |
{ |
699 |
//Try to acquire a gate on the file, to take into account files that have been dequeued |
700 |
//and are being processed |
701 |
using (var gate = NetworkGate.Acquire(item.FullName, NetworkOperation.Deleting)) |
702 |
{ |
703 |
if (gate.Failed) |
704 |
continue; |
705 |
StatusKeeper.SetFileState(item.FullName, FileStatus.Conflict, FileOverlayStatus.Deleted); |
706 |
} |
707 |
} |
708 |
UpdateStatus(PithosStatus.HasConflicts); |
709 |
StatusNotification.NotifyConflicts(filesToDelete, String.Format("{0} local files are missing from Pithos, possibly because they were deleted",filesToDelete.Count)); |
710 |
StatusNotification.NotifyForFiles(filesToDelete, String.Format("{0} files were deleted", filesToDelete.Count), TraceLevel.Info); |
711 |
} |
712 |
else |
713 |
{ |
714 |
var deletedFiles = new List<FileSystemInfo>(); |
715 |
foreach (var objectInfo in deletedObjects) |
716 |
{ |
717 |
var relativePath = objectInfo.RelativeUrlToFilePath(accountInfo.UserName); |
718 |
var item = GetFileAgent(accountInfo).GetFileSystemInfo(relativePath); |
719 |
if (item.Exists) |
720 |
{ |
721 |
//Try to acquire a gate on the file, to take into account files that have been dequeued |
722 |
//and are being processed |
723 |
//TODO: The gate is not enough. Perhaps we need to keep a journal of processed files and check against |
724 |
//that as well. |
725 |
/* |
726 |
using (var gate = NetworkGate.Acquire(item.FullName, NetworkOperation.Deleting)) |
727 |
{ |
728 |
if (gate.Failed) |
729 |
continue; |
730 |
*/ |
731 |
if ((item.Attributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly) |
732 |
{ |
733 |
item.Attributes = item.Attributes & ~FileAttributes.ReadOnly; |
734 |
|
735 |
} |
736 |
item.Delete(); |
737 |
DateTime lastDate; |
738 |
_lastSeen.TryRemove(item.FullName, out lastDate); |
739 |
deletedFiles.Add(item); |
740 |
/* |
741 |
} |
742 |
*/ |
743 |
} |
744 |
StatusKeeper.ClearFileStatus(item.FullName); |
745 |
|
746 |
} |
747 |
StatusNotification.NotifyForFiles(deletedFiles, String.Format("{0} files were deleted", deletedFiles.Count), TraceLevel.Info); |
748 |
} |
749 |
|
750 |
} |
751 |
|
752 |
private static void CreateContainerFolders(AccountInfo accountInfo, IEnumerable<ContainerInfo> containers) |
753 |
{ |
754 |
var containerPaths = from container in containers |
755 |
let containerPath = Path.Combine(accountInfo.AccountPath, container.Name) |
756 |
where container.Name != FolderConstants.TrashContainer && !Directory.Exists(containerPath) |
757 |
select containerPath; |
758 |
|
759 |
foreach (var path in containerPaths) |
760 |
{ |
761 |
Directory.CreateDirectory(path); |
762 |
} |
763 |
} |
764 |
|
765 |
//Creates an appropriate action for each server file |
766 |
private IEnumerable<CloudAction> ObjectsToActions(AccountInfo accountInfo,IEnumerable<ObjectInfo> remote) |
767 |
{ |
768 |
if (remote==null) |
769 |
throw new ArgumentNullException(); |
770 |
Contract.EndContractBlock(); |
771 |
var fileAgent = GetFileAgent(accountInfo); |
772 |
|
773 |
//In order to avoid multiple iterations over the files, we iterate only once |
774 |
//over the remote files |
775 |
foreach (var objectInfo in remote) |
776 |
{ |
777 |
var relativePath = objectInfo.RelativeUrlToFilePath(accountInfo.UserName); |
778 |
//and remove any matching objects from the list, adding them to the commonObjects list |
779 |
|
780 |
if (fileAgent.Exists(relativePath)) |
781 |
{ |
782 |
//If a directory object already exists, we don't need to perform any other action |
783 |
var localFile = fileAgent.GetFileSystemInfo(relativePath); |
784 |
if (objectInfo.Content_Type == @"application/directory" && localFile is DirectoryInfo) |
785 |
continue; |
786 |
using (new SessionScope(FlushAction.Never)) |
787 |
{ |
788 |
var state = StatusKeeper.GetStateByFilePath(localFile.FullName); |
789 |
_lastSeen[localFile.FullName] = DateTime.Now; |
790 |
//FileState.FindByFilePath(localFile.FullName); |
791 |
//Common files should be checked on a per-case basis to detect differences, which is newer |
792 |
|
793 |
yield return new CloudAction(accountInfo, CloudActionType.MustSynch, |
794 |
localFile, objectInfo, state, accountInfo.BlockSize, |
795 |
accountInfo.BlockHash); |
796 |
} |
797 |
} |
798 |
else |
799 |
{ |
800 |
//If there is no match we add them to the localFiles list |
801 |
//but only if the file is not marked for deletion |
802 |
var targetFile = Path.Combine(accountInfo.AccountPath, relativePath); |
803 |
var fileStatus = StatusKeeper.GetFileStatus(targetFile); |
804 |
if (fileStatus != FileStatus.Deleted) |
805 |
{ |
806 |
//Remote files should be downloaded |
807 |
yield return new CloudDownloadAction(accountInfo,objectInfo); |
808 |
} |
809 |
} |
810 |
} |
811 |
} |
812 |
|
813 |
private static FileAgent GetFileAgent(AccountInfo accountInfo) |
814 |
{ |
815 |
return AgentLocator<FileAgent>.Get(accountInfo.AccountPath); |
816 |
} |
817 |
|
818 |
private void ProcessTrashedFiles(AccountInfo accountInfo,IEnumerable<ObjectInfo> trashObjects) |
819 |
{ |
820 |
var fileAgent = GetFileAgent(accountInfo); |
821 |
foreach (var trashObject in trashObjects) |
822 |
{ |
823 |
var barePath = trashObject.RelativeUrlToFilePath(accountInfo.UserName); |
824 |
//HACK: Assume only the "pithos" container is used. Must find out what happens when |
825 |
//deleting a file from a different container |
826 |
var relativePath = Path.Combine("pithos", barePath); |
827 |
fileAgent.Delete(relativePath); |
828 |
} |
829 |
} |
830 |
|
831 |
|
832 |
private void RenameCloudFile(AccountInfo accountInfo,CloudMoveAction action) |
833 |
{ |
834 |
if (accountInfo==null) |
835 |
throw new ArgumentNullException("accountInfo"); |
836 |
if (action==null) |
837 |
throw new ArgumentNullException("action"); |
838 |
if (action.CloudFile==null) |
839 |
throw new ArgumentException("CloudFile","action"); |
840 |
if (action.LocalFile==null) |
841 |
throw new ArgumentException("LocalFile","action"); |
842 |
if (action.OldLocalFile==null) |
843 |
throw new ArgumentException("OldLocalFile","action"); |
844 |
if (action.OldCloudFile==null) |
845 |
throw new ArgumentException("OldCloudFile","action"); |
846 |
Contract.EndContractBlock(); |
847 |
|
848 |
|
849 |
var newFilePath = action.LocalFile.FullName; |
850 |
|
851 |
//How do we handle concurrent renames and deletes/uploads/downloads? |
852 |
//* A conflicting upload means that a file was renamed before it had a chance to finish uploading |
853 |
// This should never happen as the network agent executes only one action at a time |
854 |
//* A conflicting download means that the file was modified on the cloud. While we can go on and complete |
855 |
// the rename, there may be a problem if the file is downloaded in blocks, as subsequent block requests for the |
856 |
// same name will fail. |
857 |
// This should never happen as the network agent executes only one action at a time. |
858 |
//* A conflicting delete can happen if the rename was followed by a delete action that didn't have the chance |
859 |
// to remove the rename from the queue. |
860 |
// We can probably ignore this case. It will result in an error which should be ignored |
861 |
|
862 |
|
863 |
//The local file is already renamed |
864 |
StatusKeeper.SetFileOverlayStatus(newFilePath, FileOverlayStatus.Modified); |
865 |
|
866 |
|
867 |
var account = action.CloudFile.Account ?? accountInfo.UserName; |
868 |
var container = action.CloudFile.Container; |
869 |
|
870 |
var client = new CloudFilesClient(accountInfo); |
871 |
//TODO: What code is returned when the source file doesn't exist? |
872 |
client.MoveObject(account, container, action.OldCloudFile.Name, container, action.CloudFile.Name); |
873 |
|
874 |
StatusKeeper.SetFileStatus(newFilePath, FileStatus.Unchanged); |
875 |
StatusKeeper.SetFileOverlayStatus(newFilePath, FileOverlayStatus.Normal); |
876 |
NativeMethods.RaiseChangeNotification(newFilePath); |
877 |
} |
878 |
|
879 |
private void DeleteCloudFile(AccountInfo accountInfo, ObjectInfo cloudFile) |
880 |
{ |
881 |
if (accountInfo == null) |
882 |
throw new ArgumentNullException("accountInfo"); |
883 |
if (cloudFile==null) |
884 |
throw new ArgumentNullException("cloudFile"); |
885 |
|
886 |
if (String.IsNullOrWhiteSpace(cloudFile.Container)) |
887 |
throw new ArgumentException("Invalid container", "cloudFile"); |
888 |
Contract.EndContractBlock(); |
889 |
|
890 |
var fileAgent = GetFileAgent(accountInfo); |
891 |
|
892 |
using ( log4net.ThreadContext.Stacks["DeleteCloudFile"].Push("Delete")) |
893 |
{ |
894 |
var fileName= cloudFile.RelativeUrlToFilePath(accountInfo.UserName); |
895 |
var info = fileAgent.GetFileSystemInfo(fileName); |
896 |
var fullPath = info.FullName.ToLower(); |
897 |
|
898 |
StatusKeeper.SetFileOverlayStatus(fullPath, FileOverlayStatus.Modified); |
899 |
|
900 |
var account = cloudFile.Account ?? accountInfo.UserName; |
901 |
var container = cloudFile.Container ;//?? FolderConstants.PithosContainer; |
902 |
|
903 |
var client = new CloudFilesClient(accountInfo); |
904 |
client.DeleteObject(account, container, cloudFile.Name); |
905 |
|
906 |
StatusKeeper.ClearFileStatus(fullPath); |
907 |
} |
908 |
} |
909 |
|
910 |
//Download a file. |
911 |
private async Task DownloadCloudFile(AccountInfo accountInfo, ObjectInfo cloudFile , string filePath) |
912 |
{ |
913 |
if (accountInfo == null) |
914 |
throw new ArgumentNullException("accountInfo"); |
915 |
if (cloudFile == null) |
916 |
throw new ArgumentNullException("cloudFile"); |
917 |
if (String.IsNullOrWhiteSpace(cloudFile.Account)) |
918 |
throw new ArgumentNullException("cloudFile"); |
919 |
if (String.IsNullOrWhiteSpace(cloudFile.Container)) |
920 |
throw new ArgumentNullException("cloudFile"); |
921 |
if (String.IsNullOrWhiteSpace(filePath)) |
922 |
throw new ArgumentNullException("filePath"); |
923 |
if (!Path.IsPathRooted(filePath)) |
924 |
throw new ArgumentException("The filePath must be rooted", "filePath"); |
925 |
Contract.EndContractBlock(); |
926 |
|
927 |
|
928 |
var localPath = Interfaces.FileInfoExtensions.GetProperFilePathCapitalization(filePath); |
929 |
var relativeUrl = new Uri(cloudFile.Name, UriKind.Relative); |
930 |
|
931 |
var url = relativeUrl.ToString(); |
932 |
if (cloudFile.Name.EndsWith(".ignore", StringComparison.InvariantCultureIgnoreCase)) |
933 |
return; |
934 |
|
935 |
|
936 |
//Are we already downloading or uploading the file? |
937 |
using (var gate=NetworkGate.Acquire(localPath, NetworkOperation.Downloading)) |
938 |
{ |
939 |
if (gate.Failed) |
940 |
return; |
941 |
//The file's hashmap will be stored in the same location with the extension .hashmap |
942 |
//var hashPath = Path.Combine(FileAgent.CachePath, relativePath + ".hashmap"); |
943 |
|
944 |
var client = new CloudFilesClient(accountInfo); |
945 |
var account = cloudFile.Account; |
946 |
var container = cloudFile.Container; |
947 |
|
948 |
if (cloudFile.Content_Type == @"application/directory") |
949 |
{ |
950 |
if (!Directory.Exists(localPath)) |
951 |
Directory.CreateDirectory(localPath); |
952 |
} |
953 |
else |
954 |
{ |
955 |
//Retrieve the hashmap from the server |
956 |
var serverHash = await client.GetHashMap(account, container, url); |
957 |
//If it's a small file |
958 |
if (serverHash.Hashes.Count == 1) |
959 |
//Download it in one go |
960 |
await |
961 |
DownloadEntireFileAsync(accountInfo, client, cloudFile, relativeUrl, localPath, serverHash); |
962 |
//Otherwise download it block by block |
963 |
else |
964 |
await DownloadWithBlocks(accountInfo, client, cloudFile, relativeUrl, localPath, serverHash); |
965 |
|
966 |
if (cloudFile.AllowedTo == "read") |
967 |
{ |
968 |
var attributes = File.GetAttributes(localPath); |
969 |
File.SetAttributes(localPath, attributes | FileAttributes.ReadOnly); |
970 |
} |
971 |
} |
972 |
|
973 |
//Now we can store the object's metadata without worrying about ghost status entries |
974 |
StatusKeeper.StoreInfo(localPath, cloudFile); |
975 |
|
976 |
} |
977 |
} |
978 |
|
979 |
//Download a small file with a single GET operation |
980 |
private async Task DownloadEntireFileAsync(AccountInfo accountInfo, CloudFilesClient client, ObjectInfo cloudFile, Uri relativeUrl, string filePath,TreeHash serverHash) |
981 |
{ |
982 |
if (client == null) |
983 |
throw new ArgumentNullException("client"); |
984 |
if (cloudFile==null) |
985 |
throw new ArgumentNullException("cloudFile"); |
986 |
if (relativeUrl == null) |
987 |
throw new ArgumentNullException("relativeUrl"); |
988 |
if (String.IsNullOrWhiteSpace(filePath)) |
989 |
throw new ArgumentNullException("filePath"); |
990 |
if (!Path.IsPathRooted(filePath)) |
991 |
throw new ArgumentException("The localPath must be rooted", "filePath"); |
992 |
Contract.EndContractBlock(); |
993 |
|
994 |
var localPath = Pithos.Interfaces.FileInfoExtensions.GetProperFilePathCapitalization(filePath); |
995 |
//If the file already exists |
996 |
if (File.Exists(localPath)) |
997 |
{ |
998 |
//First check with MD5 as this is a small file |
999 |
var localMD5 = Signature.CalculateMD5(localPath); |
1000 |
var cloudHash=serverHash.TopHash.ToHashString(); |
1001 |
if (localMD5==cloudHash) |
1002 |
return; |
1003 |
//Then check with a treehash |
1004 |
var localTreeHash = Signature.CalculateTreeHash(localPath, serverHash.BlockSize, serverHash.BlockHash); |
1005 |
var localHash = localTreeHash.TopHash.ToHashString(); |
1006 |
if (localHash==cloudHash) |
1007 |
return; |
1008 |
} |
1009 |
StatusNotification.Notify(new CloudNotification { Data = cloudFile }); |
1010 |
|
1011 |
var fileAgent = GetFileAgent(accountInfo); |
1012 |
//Calculate the relative file path for the new file |
1013 |
var relativePath = relativeUrl.RelativeUriToFilePath(); |
1014 |
//The file will be stored in a temporary location while downloading with an extension .download |
1015 |
var tempPath = Path.Combine(fileAgent.CachePath, relativePath + ".download"); |
1016 |
//Make sure the target folder exists. DownloadFileTask will not create the folder |
1017 |
var tempFolder = Path.GetDirectoryName(tempPath); |
1018 |
if (!Directory.Exists(tempFolder)) |
1019 |
Directory.CreateDirectory(tempFolder); |
1020 |
|
1021 |
//Download the object to the temporary location |
1022 |
await client.GetObject(cloudFile.Account, cloudFile.Container, relativeUrl.ToString(), tempPath); |
1023 |
|
1024 |
//Create the local folder if it doesn't exist (necessary for shared objects) |
1025 |
var localFolder = Path.GetDirectoryName(localPath); |
1026 |
if (!Directory.Exists(localFolder)) |
1027 |
Directory.CreateDirectory(localFolder); |
1028 |
//And move it to its actual location once downloading is finished |
1029 |
if (File.Exists(localPath)) |
1030 |
File.Replace(tempPath,localPath,null,true); |
1031 |
else |
1032 |
File.Move(tempPath,localPath); |
1033 |
//Notify listeners that a local file has changed |
1034 |
StatusNotification.NotifyChangedFile(localPath); |
1035 |
|
1036 |
|
1037 |
} |
1038 |
|
1039 |
//Download a file asynchronously using blocks |
1040 |
public async Task DownloadWithBlocks(AccountInfo accountInfo, CloudFilesClient client, ObjectInfo cloudFile, Uri relativeUrl, string filePath, TreeHash serverHash) |
1041 |
{ |
1042 |
if (client == null) |
1043 |
throw new ArgumentNullException("client"); |
1044 |
if (cloudFile == null) |
1045 |
throw new ArgumentNullException("cloudFile"); |
1046 |
if (relativeUrl == null) |
1047 |
throw new ArgumentNullException("relativeUrl"); |
1048 |
if (String.IsNullOrWhiteSpace(filePath)) |
1049 |
throw new ArgumentNullException("filePath"); |
1050 |
if (!Path.IsPathRooted(filePath)) |
1051 |
throw new ArgumentException("The filePath must be rooted", "filePath"); |
1052 |
if (serverHash == null) |
1053 |
throw new ArgumentNullException("serverHash"); |
1054 |
Contract.EndContractBlock(); |
1055 |
|
1056 |
var fileAgent = GetFileAgent(accountInfo); |
1057 |
var localPath = Interfaces.FileInfoExtensions.GetProperFilePathCapitalization(filePath); |
1058 |
|
1059 |
//Calculate the relative file path for the new file |
1060 |
var relativePath = relativeUrl.RelativeUriToFilePath(); |
1061 |
var blockUpdater = new BlockUpdater(fileAgent.CachePath, localPath, relativePath, serverHash); |
1062 |
|
1063 |
|
1064 |
|
1065 |
//Calculate the file's treehash |
1066 |
var treeHash = await Signature.CalculateTreeHashAsync(localPath, serverHash.BlockSize, serverHash.BlockHash); |
1067 |
|
1068 |
//And compare it with the server's hash |
1069 |
var upHashes = serverHash.GetHashesAsStrings(); |
1070 |
var localHashes = treeHash.HashDictionary; |
1071 |
for (int i = 0; i < upHashes.Length; i++) |
1072 |
{ |
1073 |
//For every non-matching hash |
1074 |
var upHash = upHashes[i]; |
1075 |
if (!localHashes.ContainsKey(upHash)) |
1076 |
{ |
1077 |
StatusNotification.Notify(new CloudNotification { Data = cloudFile }); |
1078 |
|
1079 |
if (blockUpdater.UseOrphan(i, upHash)) |
1080 |
{ |
1081 |
Log.InfoFormat("[BLOCK GET] ORPHAN FOUND for {0} of {1} for {2}", i, upHashes.Length, localPath); |
1082 |
continue; |
1083 |
} |
1084 |
Log.InfoFormat("[BLOCK GET] START {0} of {1} for {2}", i, upHashes.Length, localPath); |
1085 |
var start = i*serverHash.BlockSize; |
1086 |
//To download the last block just pass a null for the end of the range |
1087 |
long? end = null; |
1088 |
if (i < upHashes.Length - 1 ) |
1089 |
end= ((i + 1)*serverHash.BlockSize) ; |
1090 |
|
1091 |
//Download the missing block |
1092 |
var block = await client.GetBlock(cloudFile.Account, cloudFile.Container, relativeUrl, start, end); |
1093 |
|
1094 |
//and store it |
1095 |
blockUpdater.StoreBlock(i, block); |
1096 |
|
1097 |
|
1098 |
Log.InfoFormat("[BLOCK GET] FINISH {0} of {1} for {2}", i, upHashes.Length, localPath); |
1099 |
} |
1100 |
} |
1101 |
|
1102 |
//Want to avoid notifications if no changes were made |
1103 |
var hasChanges = blockUpdater.HasBlocks; |
1104 |
blockUpdater.Commit(); |
1105 |
|
1106 |
if (hasChanges) |
1107 |
//Notify listeners that a local file has changed |
1108 |
StatusNotification.NotifyChangedFile(localPath); |
1109 |
|
1110 |
Log.InfoFormat("[BLOCK GET] COMPLETE {0}", localPath); |
1111 |
} |
1112 |
|
1113 |
|
1114 |
private async Task UploadCloudFile(CloudAction action) |
1115 |
{ |
1116 |
if (action == null) |
1117 |
throw new ArgumentNullException("action"); |
1118 |
Contract.EndContractBlock(); |
1119 |
|
1120 |
try |
1121 |
{ |
1122 |
var accountInfo = action.AccountInfo; |
1123 |
|
1124 |
var fileInfo = action.LocalFile; |
1125 |
|
1126 |
if (fileInfo.Extension.Equals("ignore", StringComparison.InvariantCultureIgnoreCase)) |
1127 |
return; |
1128 |
|
1129 |
var relativePath = fileInfo.AsRelativeTo(accountInfo.AccountPath); |
1130 |
if (relativePath.StartsWith(FolderConstants.OthersFolder)) |
1131 |
{ |
1132 |
var parts = relativePath.Split('\\'); |
1133 |
var accountName = parts[1]; |
1134 |
var oldName = accountInfo.UserName; |
1135 |
var absoluteUri = accountInfo.StorageUri.AbsoluteUri; |
1136 |
var nameIndex = absoluteUri.IndexOf(oldName); |
1137 |
var root = absoluteUri.Substring(0, nameIndex); |
1138 |
|
1139 |
accountInfo = new AccountInfo |
1140 |
{ |
1141 |
UserName = accountName, |
1142 |
AccountPath = Path.Combine(accountInfo.AccountPath, parts[0], parts[1]), |
1143 |
StorageUri = new Uri(root + accountName), |
1144 |
BlockHash = accountInfo.BlockHash, |
1145 |
BlockSize = accountInfo.BlockSize, |
1146 |
Token = accountInfo.Token |
1147 |
}; |
1148 |
} |
1149 |
|
1150 |
|
1151 |
var fullFileName = fileInfo.GetProperCapitalization(); |
1152 |
using (var gate = NetworkGate.Acquire(fullFileName, NetworkOperation.Uploading)) |
1153 |
{ |
1154 |
//Abort if the file is already being uploaded or downloaded |
1155 |
if (gate.Failed) |
1156 |
return; |
1157 |
|
1158 |
var cloudFile = action.CloudFile; |
1159 |
var account = cloudFile.Account ?? accountInfo.UserName; |
1160 |
|
1161 |
var client = new CloudFilesClient(accountInfo); |
1162 |
//Even if GetObjectInfo times out, we can proceed with the upload |
1163 |
var info = client.GetObjectInfo(account, cloudFile.Container, cloudFile.Name); |
1164 |
|
1165 |
//If this is a read-only file, do not upload changes |
1166 |
if (info.AllowedTo == "read") |
1167 |
return; |
1168 |
|
1169 |
//TODO: Check how a directory hash is calculated -> All dirs seem to have the same hash |
1170 |
if (fileInfo is DirectoryInfo) |
1171 |
{ |
1172 |
//If the directory doesn't exist the Hash property will be empty |
1173 |
if (String.IsNullOrWhiteSpace(info.Hash)) |
1174 |
//Go on and create the directory |
1175 |
await client.PutObject(account, cloudFile.Container, cloudFile.Name, fullFileName, String.Empty, "application/directory"); |
1176 |
} |
1177 |
else |
1178 |
{ |
1179 |
|
1180 |
var cloudHash = info.Hash.ToLower(); |
1181 |
|
1182 |
var hash = action.LocalHash.Value; |
1183 |
var topHash = action.TopHash.Value; |
1184 |
|
1185 |
//If the file hashes match, abort the upload |
1186 |
if (hash == cloudHash || topHash == cloudHash) |
1187 |
{ |
1188 |
//but store any metadata changes |
1189 |
StatusKeeper.StoreInfo(fullFileName, info); |
1190 |
Log.InfoFormat("Skip upload of {0}, hashes match", fullFileName); |
1191 |
return; |
1192 |
} |
1193 |
|
1194 |
|
1195 |
//Mark the file as modified while we upload it |
1196 |
StatusKeeper.SetFileOverlayStatus(fullFileName, FileOverlayStatus.Modified); |
1197 |
//And then upload it |
1198 |
|
1199 |
//Upload even small files using the Hashmap. The server may already contain |
1200 |
//the relevant block |
1201 |
|
1202 |
//First, calculate the tree hash |
1203 |
var treeHash = await Signature.CalculateTreeHashAsync(fullFileName, accountInfo.BlockSize, |
1204 |
accountInfo.BlockHash); |
1205 |
|
1206 |
await UploadWithHashMap(accountInfo, cloudFile, fileInfo as FileInfo, cloudFile.Name, treeHash); |
1207 |
} |
1208 |
//If everything succeeds, change the file and overlay status to normal |
1209 |
StatusKeeper.SetFileState(fullFileName, FileStatus.Unchanged, FileOverlayStatus.Normal); |
1210 |
} |
1211 |
//Notify the Shell to update the overlays |
1212 |
NativeMethods.RaiseChangeNotification(fullFileName); |
1213 |
StatusNotification.NotifyChangedFile(fullFileName); |
1214 |
} |
1215 |
catch (AggregateException ex) |
1216 |
{ |
1217 |
var exc = ex.InnerException as WebException; |
1218 |
if (exc == null) |
1219 |
throw ex.InnerException; |
1220 |
if (HandleUploadWebException(action, exc)) |
1221 |
return; |
1222 |
throw; |
1223 |
} |
1224 |
catch (WebException ex) |
1225 |
{ |
1226 |
if (HandleUploadWebException(action, ex)) |
1227 |
return; |
1228 |
throw; |
1229 |
} |
1230 |
catch (Exception ex) |
1231 |
{ |
1232 |
Log.Error("Unexpected error while uploading file", ex); |
1233 |
throw; |
1234 |
} |
1235 |
|
1236 |
} |
1237 |
|
1238 |
//Returns true if an action concerns a file that was deleted |
1239 |
private bool IsDeletedFile(CloudAction action) |
1240 |
{ |
1241 |
//Doesn't work for actions targeting shared files |
1242 |
if (action.IsShared) |
1243 |
return false; |
1244 |
var key = GetFileKey(action.CloudFile); |
1245 |
DateTime entryDate; |
1246 |
if (_deletedFiles.TryGetValue(key, out entryDate)) |
1247 |
{ |
1248 |
//If the delete entry was created after this action, abort the action |
1249 |
if (entryDate > action.Created) |
1250 |
return true; |
1251 |
//Otherwise, remove the stale entry |
1252 |
_deletedFiles.TryRemove(key, out entryDate); |
1253 |
} |
1254 |
return false; |
1255 |
} |
1256 |
|
1257 |
private bool HandleUploadWebException(CloudAction action, WebException exc) |
1258 |
{ |
1259 |
var response = exc.Response as HttpWebResponse; |
1260 |
if (response == null) |
1261 |
throw exc; |
1262 |
if (response.StatusCode == HttpStatusCode.Unauthorized) |
1263 |
{ |
1264 |
Log.Error("Not allowed to upload file", exc); |
1265 |
var message = String.Format("Not allowed to uplad file {0}", action.LocalFile.FullName); |
1266 |
StatusKeeper.SetFileState(action.LocalFile.FullName, FileStatus.Unchanged, FileOverlayStatus.Normal); |
1267 |
StatusNotification.NotifyChange(message, TraceLevel.Warning); |
1268 |
return true; |
1269 |
} |
1270 |
return false; |
1271 |
} |
1272 |
|
1273 |
public async Task UploadWithHashMap(AccountInfo accountInfo,ObjectInfo cloudFile,FileInfo fileInfo,string url,TreeHash treeHash) |
1274 |
{ |
1275 |
if (accountInfo == null) |
1276 |
throw new ArgumentNullException("accountInfo"); |
1277 |
if (cloudFile==null) |
1278 |
throw new ArgumentNullException("cloudFile"); |
1279 |
if (fileInfo == null) |
1280 |
throw new ArgumentNullException("fileInfo"); |
1281 |
if (String.IsNullOrWhiteSpace(url)) |
1282 |
throw new ArgumentNullException(url); |
1283 |
if (treeHash==null) |
1284 |
throw new ArgumentNullException("treeHash"); |
1285 |
if (String.IsNullOrWhiteSpace(cloudFile.Container) ) |
1286 |
throw new ArgumentException("Invalid container","cloudFile"); |
1287 |
Contract.EndContractBlock(); |
1288 |
|
1289 |
var fullFileName = fileInfo.GetProperCapitalization(); |
1290 |
|
1291 |
var account = cloudFile.Account ?? accountInfo.UserName; |
1292 |
var container = cloudFile.Container ; |
1293 |
|
1294 |
var client = new CloudFilesClient(accountInfo); |
1295 |
//Send the hashmap to the server |
1296 |
var missingHashes = await client.PutHashMap(account, container, url, treeHash); |
1297 |
//If the server returns no missing hashes, we are done |
1298 |
while (missingHashes.Count > 0) |
1299 |
{ |
1300 |
|
1301 |
var buffer = new byte[accountInfo.BlockSize]; |
1302 |
foreach (var missingHash in missingHashes) |
1303 |
{ |
1304 |
//Find the proper block |
1305 |
var blockIndex = treeHash.HashDictionary[missingHash]; |
1306 |
var offset = blockIndex*accountInfo.BlockSize; |
1307 |
|
1308 |
var read = fileInfo.Read(buffer, offset, accountInfo.BlockSize); |
1309 |
|
1310 |
try |
1311 |
{ |
1312 |
//And upload the block |
1313 |
await client.PostBlock(account, container, buffer, 0, read); |
1314 |
Log.InfoFormat("[BLOCK] Block {0} of {1} uploaded", blockIndex, fullFileName); |
1315 |
} |
1316 |
catch (Exception exc) |
1317 |
{ |
1318 |
Log.ErrorFormat("[ERROR] uploading block {0} of {1}\n{2}", blockIndex, fullFileName, exc); |
1319 |
} |
1320 |
|
1321 |
} |
1322 |
|
1323 |
//Repeat until there are no more missing hashes |
1324 |
missingHashes = await client.PutHashMap(account, container, url, treeHash); |
1325 |
} |
1326 |
} |
1327 |
|
1328 |
|
1329 |
public void AddAccount(AccountInfo accountInfo) |
1330 |
{ |
1331 |
if (!_accounts.Contains(accountInfo)) |
1332 |
_accounts.Add(accountInfo); |
1333 |
} |
1334 |
} |
1335 |
|
1336 |
|
1337 |
|
1338 |
|
1339 |
} |