root / trunk / Pithos.Core / Agents / NetworkAgent.cs @ ec1a1baf
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#region |
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/* ----------------------------------------------------------------------- |
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* <copyright file="NetworkAgent.cs" company="GRNet"> |
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* |
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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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* |
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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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#endregion |
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|
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using System; |
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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.Net; |
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using System.Threading; |
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using System.Threading.Tasks; |
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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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[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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[System.ComponentModel.Composition.Import] |
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private DeleteAgent _deleteAgent=new DeleteAgent(); |
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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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[System.ComponentModel.Composition.Import] |
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public IPithosSettings Settings { get; set; } |
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|
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//The Proceed signals the poll agent that it can proceed with polling. |
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//Essentially it stops the poll agent to give priority to the network agent |
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//Initially the event is signalled because we don't need to pause |
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private readonly AsyncManualResetEvent _proceedEvent = new AsyncManualResetEvent(true); |
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|
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public AsyncManualResetEvent ProceedEvent |
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{ |
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get { return _proceedEvent; } |
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} |
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|
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|
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public void Start() |
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{ |
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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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_deleteAgent.ProceedEvent.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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} |
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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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|
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|
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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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_proceedEvent.Reset(); |
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UpdateStatus(PithosStatus.Syncing); |
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var accountInfo = action.AccountInfo; |
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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 (_deleteAgent.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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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.RenameLocal: |
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RenameLocalFile(accountInfo, action); |
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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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if (_agent.IsEmpty) |
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_proceedEvent.Set(); |
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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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|
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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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private void RenameLocalFile(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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//We assume that the local file already exists, otherwise the poll agent |
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//would have issued a download request |
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|
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var currentInfo = action.CloudFile; |
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var previousInfo = action.CloudFile.Previous; |
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var fileAgent = FileAgent.GetFileAgent(accountInfo); |
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|
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var previousRelativepath = previousInfo.RelativeUrlToFilePath(accountInfo.UserName); |
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var previousFile = fileAgent.GetFileSystemInfo(previousRelativepath); |
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|
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//In every case we need to move the local file first |
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MoveLocalFile(accountInfo, previousFile, fileAgent, currentInfo); |
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|
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} |
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|
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private void MoveLocalFile(AccountInfo accountInfo, FileSystemInfo previousFile, FileAgent fileAgent, |
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ObjectInfo currentInfo) |
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{ |
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var currentRelativepath = currentInfo.RelativeUrlToFilePath(accountInfo.UserName); |
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var newPath = Path.Combine(fileAgent.RootPath, currentRelativepath); |
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|
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var isFile= (previousFile is FileInfo); |
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var previousFullPath = isFile? |
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FileInfoExtensions.GetProperFilePathCapitalization(previousFile.FullName): |
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FileInfoExtensions.GetProperDirectoryCapitalization(previousFile.FullName); |
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|
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using (var gateOld = NetworkGate.Acquire(previousFullPath, NetworkOperation.Renaming)) |
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using (var gateNew = NetworkGate.Acquire(newPath,NetworkOperation.Renaming)) |
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using (new SessionScope(FlushAction.Auto)) |
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{ |
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if (isFile) |
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(previousFile as FileInfo).MoveTo(newPath); |
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else |
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{ |
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(previousFile as DirectoryInfo).MoveTo(newPath); |
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} |
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var state = StatusKeeper.GetStateByFilePath(previousFullPath); |
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state.FilePath = newPath; |
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state.SaveCopy(); |
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StatusKeeper.SetFileState(previousFullPath,FileStatus.Deleted,FileOverlayStatus.Deleted); |
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} |
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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 previousCloudHash = cloudFile.PreviousHash.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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//At this point we know that an object has changed on the server and that a local |
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//file already exists. We need to decide whether the file has only changed on |
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//the server or there is a conflicting change on the client. |
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// |
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|
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//Not enough to compare only the local hashes (MD5), also have to compare the tophashes |
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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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|
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// If the previous tophash matches the local tophash, the file was only changed on the server. |
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if (localHash == previousCloudHash) |
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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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//If the previous and local hash don't match, there was a local conflict |
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//that was not uploaded to the server. We have a conflict |
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ReportConflict(downloadPath); |
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} |
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} |
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|
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private void ReportConflict(string downloadPath) |
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{ |
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if (String.IsNullOrWhiteSpace(downloadPath)) |
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throw new ArgumentNullException("downloadPath"); |
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Contract.EndContractBlock(); |
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|
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StatusKeeper.SetFileOverlayStatus(downloadPath, FileOverlayStatus.Conflict); |
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UpdateStatus(PithosStatus.HasConflicts); |
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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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} |
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|
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public void Post(CloudAction cloudAction) |
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{ |
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if (cloudAction == null) |
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throw new ArgumentNullException("cloudAction"); |
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if (cloudAction.AccountInfo==null) |
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throw new ArgumentException("The CloudAction.AccountInfo is empty","cloudAction"); |
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Contract.EndContractBlock(); |
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|
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_deleteAgent.ProceedEvent.Wait(); |
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|
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//If the action targets a local file, add a treehash calculation |
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if (!(cloudAction is CloudDeleteAction) && cloudAction.LocalFile as FileInfo != null) |
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{ |
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var accountInfo = cloudAction.AccountInfo; |
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var localFile = (FileInfo) cloudAction.LocalFile; |
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if (localFile.Length > accountInfo.BlockSize) |
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cloudAction.TopHash = |
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new Lazy<string>(() => Signature.CalculateTreeHashAsync(localFile, |
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accountInfo.BlockSize, |
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accountInfo.BlockHash, Settings.HashingParallelism).Result |
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.TopHash.ToHashString()); |
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else |
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{ |
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cloudAction.TopHash = new Lazy<string>(() => cloudAction.LocalHash.Value); |
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} |
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} |
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else |
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{ |
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//The hash for a directory is the empty string |
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cloudAction.TopHash = new Lazy<string>(() => String.Empty); |
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} |
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|
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if (cloudAction is CloudDeleteAction) |
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_deleteAgent.Post((CloudDeleteAction)cloudAction); |
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else |
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_agent.Post(cloudAction); |
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} |
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|
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|
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public IEnumerable<CloudAction> GetEnumerable() |
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{ |
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return _agent.GetEnumerable(); |
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} |
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|
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public Task GetDeleteAwaiter() |
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{ |
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return _deleteAgent.ProceedEvent.WaitAsync(); |
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} |
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public CancellationToken CancellationToken |
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{ |
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get { return _agent.CancellationToken; } |
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} |
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|
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private static FileAgent GetFileAgent(AccountInfo accountInfo) |
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{ |
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return AgentLocator<FileAgent>.Get(accountInfo.AccountPath); |
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} |
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|
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|
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|
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private void RenameCloudFile(AccountInfo accountInfo,CloudMoveAction action) |
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{ |
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if (accountInfo==null) |
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throw new ArgumentNullException("accountInfo"); |
403 |
if (action==null) |
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throw new ArgumentNullException("action"); |
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if (action.CloudFile==null) |
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throw new ArgumentException("CloudFile","action"); |
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if (action.LocalFile==null) |
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throw new ArgumentException("LocalFile","action"); |
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if (action.OldLocalFile==null) |
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throw new ArgumentException("OldLocalFile","action"); |
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if (action.OldCloudFile==null) |
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throw new ArgumentException("OldCloudFile","action"); |
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Contract.EndContractBlock(); |
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|
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|
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var newFilePath = action.LocalFile.FullName; |
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|
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//How do we handle concurrent renames and deletes/uploads/downloads? |
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//* A conflicting upload means that a file was renamed before it had a chance to finish uploading |
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// This should never happen as the network agent executes only one action at a time |
421 |
//* A conflicting download means that the file was modified on the cloud. While we can go on and complete |
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// the rename, there may be a problem if the file is downloaded in blocks, as subsequent block requests for the |
423 |
// same name will fail. |
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// This should never happen as the network agent executes only one action at a time. |
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//* A conflicting delete can happen if the rename was followed by a delete action that didn't have the chance |
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// to remove the rename from the queue. |
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// We can probably ignore this case. It will result in an error which should be ignored |
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|
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|
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//The local file is already renamed |
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StatusKeeper.SetFileOverlayStatus(newFilePath, FileOverlayStatus.Modified); |
432 |
|
433 |
|
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var account = action.CloudFile.Account ?? accountInfo.UserName; |
435 |
var container = action.CloudFile.Container; |
436 |
|
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var client = new CloudFilesClient(accountInfo); |
438 |
//TODO: What code is returned when the source file doesn't exist? |
439 |
client.MoveObject(account, container, action.OldCloudFile.Name, container, action.CloudFile.Name); |
440 |
|
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StatusKeeper.SetFileStatus(newFilePath, FileStatus.Unchanged); |
442 |
StatusKeeper.SetFileOverlayStatus(newFilePath, FileOverlayStatus.Normal); |
443 |
NativeMethods.RaiseChangeNotification(newFilePath); |
444 |
} |
445 |
|
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//Download a file. |
447 |
private async Task DownloadCloudFile(AccountInfo accountInfo, ObjectInfo cloudFile , string filePath) |
448 |
{ |
449 |
if (accountInfo == null) |
450 |
throw new ArgumentNullException("accountInfo"); |
451 |
if (cloudFile == null) |
452 |
throw new ArgumentNullException("cloudFile"); |
453 |
if (String.IsNullOrWhiteSpace(cloudFile.Account)) |
454 |
throw new ArgumentNullException("cloudFile"); |
455 |
if (String.IsNullOrWhiteSpace(cloudFile.Container)) |
456 |
throw new ArgumentNullException("cloudFile"); |
457 |
if (String.IsNullOrWhiteSpace(filePath)) |
458 |
throw new ArgumentNullException("filePath"); |
459 |
if (!Path.IsPathRooted(filePath)) |
460 |
throw new ArgumentException("The filePath must be rooted", "filePath"); |
461 |
Contract.EndContractBlock(); |
462 |
|
463 |
|
464 |
var localPath = Interfaces.FileInfoExtensions.GetProperFilePathCapitalization(filePath); |
465 |
var relativeUrl = new Uri(cloudFile.Name, UriKind.Relative); |
466 |
|
467 |
var url = relativeUrl.ToString(); |
468 |
if (cloudFile.Name.EndsWith(".ignore", StringComparison.InvariantCultureIgnoreCase)) |
469 |
return; |
470 |
|
471 |
|
472 |
//Are we already downloading or uploading the file? |
473 |
using (var gate=NetworkGate.Acquire(localPath, NetworkOperation.Downloading)) |
474 |
{ |
475 |
if (gate.Failed) |
476 |
return; |
477 |
|
478 |
var client = new CloudFilesClient(accountInfo); |
479 |
var account = cloudFile.Account; |
480 |
var container = cloudFile.Container; |
481 |
|
482 |
if (cloudFile.Content_Type == @"application/directory") |
483 |
{ |
484 |
if (!Directory.Exists(localPath)) |
485 |
Directory.CreateDirectory(localPath); |
486 |
} |
487 |
else |
488 |
{ |
489 |
//Retrieve the hashmap from the server |
490 |
var serverHash = await client.GetHashMap(account, container, url); |
491 |
//If it's a small file |
492 |
if (serverHash.Hashes.Count == 1) |
493 |
//Download it in one go |
494 |
await |
495 |
DownloadEntireFileAsync(accountInfo, client, cloudFile, relativeUrl, localPath, serverHash); |
496 |
//Otherwise download it block by block |
497 |
else |
498 |
await DownloadWithBlocks(accountInfo, client, cloudFile, relativeUrl, localPath, serverHash); |
499 |
|
500 |
if (cloudFile.AllowedTo == "read") |
501 |
{ |
502 |
var attributes = File.GetAttributes(localPath); |
503 |
File.SetAttributes(localPath, attributes | FileAttributes.ReadOnly); |
504 |
} |
505 |
} |
506 |
|
507 |
//Now we can store the object's metadata without worrying about ghost status entries |
508 |
StatusKeeper.StoreInfo(localPath, cloudFile); |
509 |
|
510 |
} |
511 |
} |
512 |
|
513 |
//Download a small file with a single GET operation |
514 |
private async Task DownloadEntireFileAsync(AccountInfo accountInfo, CloudFilesClient client, ObjectInfo cloudFile, Uri relativeUrl, string filePath,TreeHash serverHash) |
515 |
{ |
516 |
if (client == null) |
517 |
throw new ArgumentNullException("client"); |
518 |
if (cloudFile==null) |
519 |
throw new ArgumentNullException("cloudFile"); |
520 |
if (relativeUrl == null) |
521 |
throw new ArgumentNullException("relativeUrl"); |
522 |
if (String.IsNullOrWhiteSpace(filePath)) |
523 |
throw new ArgumentNullException("filePath"); |
524 |
if (!Path.IsPathRooted(filePath)) |
525 |
throw new ArgumentException("The localPath must be rooted", "filePath"); |
526 |
Contract.EndContractBlock(); |
527 |
|
528 |
var localPath = Pithos.Interfaces.FileInfoExtensions.GetProperFilePathCapitalization(filePath); |
529 |
//If the file already exists |
530 |
if (File.Exists(localPath)) |
531 |
{ |
532 |
//First check with MD5 as this is a small file |
533 |
var localMD5 = Signature.CalculateMD5(localPath); |
534 |
var cloudHash=serverHash.TopHash.ToHashString(); |
535 |
if (localMD5==cloudHash) |
536 |
return; |
537 |
//Then check with a treehash |
538 |
var localTreeHash = Signature.CalculateTreeHash(localPath, serverHash.BlockSize, serverHash.BlockHash); |
539 |
var localHash = localTreeHash.TopHash.ToHashString(); |
540 |
if (localHash==cloudHash) |
541 |
return; |
542 |
} |
543 |
StatusNotification.Notify(new CloudNotification { Data = cloudFile }); |
544 |
|
545 |
var fileAgent = GetFileAgent(accountInfo); |
546 |
//Calculate the relative file path for the new file |
547 |
var relativePath = relativeUrl.RelativeUriToFilePath(); |
548 |
//The file will be stored in a temporary location while downloading with an extension .download |
549 |
var tempPath = Path.Combine(fileAgent.CachePath, relativePath + ".download"); |
550 |
//Make sure the target folder exists. DownloadFileTask will not create the folder |
551 |
var tempFolder = Path.GetDirectoryName(tempPath); |
552 |
if (!Directory.Exists(tempFolder)) |
553 |
Directory.CreateDirectory(tempFolder); |
554 |
|
555 |
//Download the object to the temporary location |
556 |
await client.GetObject(cloudFile.Account, cloudFile.Container, relativeUrl.ToString(), tempPath); |
557 |
|
558 |
//Create the local folder if it doesn't exist (necessary for shared objects) |
559 |
var localFolder = Path.GetDirectoryName(localPath); |
560 |
if (!Directory.Exists(localFolder)) |
561 |
Directory.CreateDirectory(localFolder); |
562 |
//And move it to its actual location once downloading is finished |
563 |
if (File.Exists(localPath)) |
564 |
File.Replace(tempPath,localPath,null,true); |
565 |
else |
566 |
File.Move(tempPath,localPath); |
567 |
//Notify listeners that a local file has changed |
568 |
StatusNotification.NotifyChangedFile(localPath); |
569 |
|
570 |
|
571 |
} |
572 |
|
573 |
//Download a file asynchronously using blocks |
574 |
public async Task DownloadWithBlocks(AccountInfo accountInfo, CloudFilesClient client, ObjectInfo cloudFile, Uri relativeUrl, string filePath, TreeHash serverHash) |
575 |
{ |
576 |
if (client == null) |
577 |
throw new ArgumentNullException("client"); |
578 |
if (cloudFile == null) |
579 |
throw new ArgumentNullException("cloudFile"); |
580 |
if (relativeUrl == null) |
581 |
throw new ArgumentNullException("relativeUrl"); |
582 |
if (String.IsNullOrWhiteSpace(filePath)) |
583 |
throw new ArgumentNullException("filePath"); |
584 |
if (!Path.IsPathRooted(filePath)) |
585 |
throw new ArgumentException("The filePath must be rooted", "filePath"); |
586 |
if (serverHash == null) |
587 |
throw new ArgumentNullException("serverHash"); |
588 |
Contract.EndContractBlock(); |
589 |
|
590 |
var fileAgent = GetFileAgent(accountInfo); |
591 |
var localPath = Interfaces.FileInfoExtensions.GetProperFilePathCapitalization(filePath); |
592 |
|
593 |
//Calculate the relative file path for the new file |
594 |
var relativePath = relativeUrl.RelativeUriToFilePath(); |
595 |
var blockUpdater = new BlockUpdater(fileAgent.CachePath, localPath, relativePath, serverHash); |
596 |
|
597 |
|
598 |
|
599 |
//Calculate the file's treehash |
600 |
var treeHash = await Signature.CalculateTreeHashAsync(localPath, serverHash.BlockSize, serverHash.BlockHash, 2); |
601 |
|
602 |
//And compare it with the server's hash |
603 |
var upHashes = serverHash.GetHashesAsStrings(); |
604 |
var localHashes = treeHash.HashDictionary; |
605 |
for (int i = 0; i < upHashes.Length; i++) |
606 |
{ |
607 |
//For every non-matching hash |
608 |
var upHash = upHashes[i]; |
609 |
if (!localHashes.ContainsKey(upHash)) |
610 |
{ |
611 |
StatusNotification.Notify(new CloudNotification { Data = cloudFile }); |
612 |
|
613 |
if (blockUpdater.UseOrphan(i, upHash)) |
614 |
{ |
615 |
Log.InfoFormat("[BLOCK GET] ORPHAN FOUND for {0} of {1} for {2}", i, upHashes.Length, localPath); |
616 |
continue; |
617 |
} |
618 |
Log.InfoFormat("[BLOCK GET] START {0} of {1} for {2}", i, upHashes.Length, localPath); |
619 |
var start = i*serverHash.BlockSize; |
620 |
//To download the last block just pass a null for the end of the range |
621 |
long? end = null; |
622 |
if (i < upHashes.Length - 1 ) |
623 |
end= ((i + 1)*serverHash.BlockSize) ; |
624 |
|
625 |
//Download the missing block |
626 |
var block = await client.GetBlock(cloudFile.Account, cloudFile.Container, relativeUrl, start, end); |
627 |
|
628 |
//and store it |
629 |
blockUpdater.StoreBlock(i, block); |
630 |
|
631 |
|
632 |
Log.InfoFormat("[BLOCK GET] FINISH {0} of {1} for {2}", i, upHashes.Length, localPath); |
633 |
} |
634 |
} |
635 |
|
636 |
//Want to avoid notifications if no changes were made |
637 |
var hasChanges = blockUpdater.HasBlocks; |
638 |
blockUpdater.Commit(); |
639 |
|
640 |
if (hasChanges) |
641 |
//Notify listeners that a local file has changed |
642 |
StatusNotification.NotifyChangedFile(localPath); |
643 |
|
644 |
Log.InfoFormat("[BLOCK GET] COMPLETE {0}", localPath); |
645 |
} |
646 |
|
647 |
|
648 |
private async Task UploadCloudFile(CloudAction action) |
649 |
{ |
650 |
if (action == null) |
651 |
throw new ArgumentNullException("action"); |
652 |
Contract.EndContractBlock(); |
653 |
|
654 |
try |
655 |
{ |
656 |
var accountInfo = action.AccountInfo; |
657 |
|
658 |
var fileInfo = action.LocalFile; |
659 |
|
660 |
if (fileInfo.Extension.Equals("ignore", StringComparison.InvariantCultureIgnoreCase)) |
661 |
return; |
662 |
|
663 |
var relativePath = fileInfo.AsRelativeTo(accountInfo.AccountPath); |
664 |
if (relativePath.StartsWith(FolderConstants.OthersFolder)) |
665 |
{ |
666 |
var parts = relativePath.Split('\\'); |
667 |
var accountName = parts[1]; |
668 |
var oldName = accountInfo.UserName; |
669 |
var absoluteUri = accountInfo.StorageUri.AbsoluteUri; |
670 |
var nameIndex = absoluteUri.IndexOf(oldName, StringComparison.Ordinal); |
671 |
var root = absoluteUri.Substring(0, nameIndex); |
672 |
|
673 |
accountInfo = new AccountInfo |
674 |
{ |
675 |
UserName = accountName, |
676 |
AccountPath = Path.Combine(accountInfo.AccountPath, parts[0], parts[1]), |
677 |
StorageUri = new Uri(root + accountName), |
678 |
BlockHash = accountInfo.BlockHash, |
679 |
BlockSize = accountInfo.BlockSize, |
680 |
Token = accountInfo.Token |
681 |
}; |
682 |
} |
683 |
|
684 |
|
685 |
var fullFileName = fileInfo.GetProperCapitalization(); |
686 |
using (var gate = NetworkGate.Acquire(fullFileName, NetworkOperation.Uploading)) |
687 |
{ |
688 |
//Abort if the file is already being uploaded or downloaded |
689 |
if (gate.Failed) |
690 |
return; |
691 |
|
692 |
var cloudFile = action.CloudFile; |
693 |
var account = cloudFile.Account ?? accountInfo.UserName; |
694 |
|
695 |
var client = new CloudFilesClient(accountInfo); |
696 |
//Even if GetObjectInfo times out, we can proceed with the upload |
697 |
var info = client.GetObjectInfo(account, cloudFile.Container, cloudFile.Name); |
698 |
|
699 |
//If this is a read-only file, do not upload changes |
700 |
if (info.AllowedTo == "read") |
701 |
return; |
702 |
|
703 |
//TODO: Check how a directory hash is calculated -> All dirs seem to have the same hash |
704 |
if (fileInfo is DirectoryInfo) |
705 |
{ |
706 |
//If the directory doesn't exist the Hash property will be empty |
707 |
if (String.IsNullOrWhiteSpace(info.Hash)) |
708 |
//Go on and create the directory |
709 |
await client.PutObject(account, cloudFile.Container, cloudFile.Name, fullFileName, String.Empty, "application/directory"); |
710 |
} |
711 |
else |
712 |
{ |
713 |
|
714 |
var cloudHash = info.Hash.ToLower(); |
715 |
|
716 |
var hash = action.LocalHash.Value; |
717 |
var topHash = action.TopHash.Value; |
718 |
|
719 |
//If the file hashes match, abort the upload |
720 |
if (hash == cloudHash || topHash == cloudHash) |
721 |
{ |
722 |
//but store any metadata changes |
723 |
StatusKeeper.StoreInfo(fullFileName, info); |
724 |
Log.InfoFormat("Skip upload of {0}, hashes match", fullFileName); |
725 |
return; |
726 |
} |
727 |
|
728 |
|
729 |
//Mark the file as modified while we upload it |
730 |
StatusKeeper.SetFileOverlayStatus(fullFileName, FileOverlayStatus.Modified); |
731 |
//And then upload it |
732 |
|
733 |
//Upload even small files using the Hashmap. The server may already contain |
734 |
//the relevant block |
735 |
|
736 |
//First, calculate the tree hash |
737 |
var treeHash = await Signature.CalculateTreeHashAsync(fullFileName, accountInfo.BlockSize, |
738 |
accountInfo.BlockHash, 2); |
739 |
|
740 |
await UploadWithHashMap(accountInfo, cloudFile, fileInfo as FileInfo, cloudFile.Name, treeHash); |
741 |
} |
742 |
//If everything succeeds, change the file and overlay status to normal |
743 |
StatusKeeper.SetFileState(fullFileName, FileStatus.Unchanged, FileOverlayStatus.Normal); |
744 |
} |
745 |
//Notify the Shell to update the overlays |
746 |
NativeMethods.RaiseChangeNotification(fullFileName); |
747 |
StatusNotification.NotifyChangedFile(fullFileName); |
748 |
} |
749 |
catch (AggregateException ex) |
750 |
{ |
751 |
var exc = ex.InnerException as WebException; |
752 |
if (exc == null) |
753 |
throw ex.InnerException; |
754 |
if (HandleUploadWebException(action, exc)) |
755 |
return; |
756 |
throw; |
757 |
} |
758 |
catch (WebException ex) |
759 |
{ |
760 |
if (HandleUploadWebException(action, ex)) |
761 |
return; |
762 |
throw; |
763 |
} |
764 |
catch (Exception ex) |
765 |
{ |
766 |
Log.Error("Unexpected error while uploading file", ex); |
767 |
throw; |
768 |
} |
769 |
|
770 |
} |
771 |
|
772 |
|
773 |
|
774 |
private bool HandleUploadWebException(CloudAction action, WebException exc) |
775 |
{ |
776 |
var response = exc.Response as HttpWebResponse; |
777 |
if (response == null) |
778 |
throw exc; |
779 |
if (response.StatusCode == HttpStatusCode.Unauthorized) |
780 |
{ |
781 |
Log.Error("Not allowed to upload file", exc); |
782 |
var message = String.Format("Not allowed to uplad file {0}", action.LocalFile.FullName); |
783 |
StatusKeeper.SetFileState(action.LocalFile.FullName, FileStatus.Unchanged, FileOverlayStatus.Normal); |
784 |
StatusNotification.NotifyChange(message, TraceLevel.Warning); |
785 |
return true; |
786 |
} |
787 |
return false; |
788 |
} |
789 |
|
790 |
public async Task UploadWithHashMap(AccountInfo accountInfo,ObjectInfo cloudFile,FileInfo fileInfo,string url,TreeHash treeHash) |
791 |
{ |
792 |
if (accountInfo == null) |
793 |
throw new ArgumentNullException("accountInfo"); |
794 |
if (cloudFile==null) |
795 |
throw new ArgumentNullException("cloudFile"); |
796 |
if (fileInfo == null) |
797 |
throw new ArgumentNullException("fileInfo"); |
798 |
if (String.IsNullOrWhiteSpace(url)) |
799 |
throw new ArgumentNullException(url); |
800 |
if (treeHash==null) |
801 |
throw new ArgumentNullException("treeHash"); |
802 |
if (String.IsNullOrWhiteSpace(cloudFile.Container) ) |
803 |
throw new ArgumentException("Invalid container","cloudFile"); |
804 |
Contract.EndContractBlock(); |
805 |
|
806 |
var fullFileName = fileInfo.GetProperCapitalization(); |
807 |
|
808 |
var account = cloudFile.Account ?? accountInfo.UserName; |
809 |
var container = cloudFile.Container ; |
810 |
|
811 |
var client = new CloudFilesClient(accountInfo); |
812 |
//Send the hashmap to the server |
813 |
var missingHashes = await client.PutHashMap(account, container, url, treeHash); |
814 |
//If the server returns no missing hashes, we are done |
815 |
while (missingHashes.Count > 0) |
816 |
{ |
817 |
|
818 |
var buffer = new byte[accountInfo.BlockSize]; |
819 |
foreach (var missingHash in missingHashes) |
820 |
{ |
821 |
//Find the proper block |
822 |
var blockIndex = treeHash.HashDictionary[missingHash]; |
823 |
var offset = blockIndex*accountInfo.BlockSize; |
824 |
|
825 |
var read = fileInfo.Read(buffer, offset, accountInfo.BlockSize); |
826 |
|
827 |
try |
828 |
{ |
829 |
//And upload the block |
830 |
await client.PostBlock(account, container, buffer, 0, read); |
831 |
Log.InfoFormat("[BLOCK] Block {0} of {1} uploaded", blockIndex, fullFileName); |
832 |
} |
833 |
catch (Exception exc) |
834 |
{ |
835 |
Log.ErrorFormat("[ERROR] uploading block {0} of {1}\n{2}", blockIndex, fullFileName, exc); |
836 |
} |
837 |
|
838 |
} |
839 |
|
840 |
//Repeat until there are no more missing hashes |
841 |
missingHashes = await client.PutHashMap(account, container, url, treeHash); |
842 |
} |
843 |
} |
844 |
|
845 |
|
846 |
} |
847 |
|
848 |
|
849 |
|
850 |
|
851 |
} |