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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.Contracts;
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using System.IO;
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using System.Linq;
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using System.Reflection;
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using System.Threading;
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using System.Threading.Tasks;
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using Pithos.Interfaces;
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using Pithos.Network;
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using log4net;
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namespace Pithos.Core.Agents
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{
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[Export(typeof(Downloader))]
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public class Downloader
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{
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private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
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[Import]
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private IStatusKeeper StatusKeeper { get; set; }
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public IStatusNotification StatusNotification { get; set; }
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/*
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private CancellationTokenSource _cts=new CancellationTokenSource();
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public void SignalStop()
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{
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_cts.Cancel();
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}
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*/
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//Download a file.
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public async Task DownloadCloudFile(AccountInfo accountInfo, ObjectInfo cloudFile, string filePath,CancellationToken cancellationToken)
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{
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if (accountInfo == null)
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throw new ArgumentNullException("accountInfo");
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if (cloudFile == null)
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throw new ArgumentNullException("cloudFile");
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if (String.IsNullOrWhiteSpace(cloudFile.Account))
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throw new ArgumentNullException("cloudFile");
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if (String.IsNullOrWhiteSpace(cloudFile.Container))
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throw new ArgumentNullException("cloudFile");
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if (String.IsNullOrWhiteSpace(filePath))
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throw new ArgumentNullException("filePath");
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if (!Path.IsPathRooted(filePath))
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throw new ArgumentException("The filePath must be rooted", "filePath");
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Contract.EndContractBlock();
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using (ThreadContext.Stacks["Operation"].Push("DownloadCloudFile"))
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{
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1 |
using System;
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2 |
using System.Collections.Generic;
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3 |
using System.ComponentModel.Composition;
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4 |
using System.Diagnostics.Contracts;
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5 |
using System.IO;
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6 |
using System.Linq;
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7 |
using System.Reflection;
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using System.Threading;
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using System.Threading.Tasks;
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using Pithos.Interfaces;
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using Pithos.Network;
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using log4net;
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namespace Pithos.Core.Agents
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{
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[Export(typeof(Downloader))]
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public class Downloader
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{
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private static readonly ILog Log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
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[Import]
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private IStatusKeeper StatusKeeper { get; set; }
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public IStatusNotification StatusNotification { get; set; }
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/*
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private CancellationTokenSource _cts=new CancellationTokenSource();
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public void SignalStop()
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{
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_cts.Cancel();
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}
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*/
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//Download a file.
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public async Task DownloadCloudFile(AccountInfo accountInfo, ObjectInfo cloudFile, string filePath,CancellationToken cancellationToken)
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{
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if (accountInfo == null)
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throw new ArgumentNullException("accountInfo");
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if (cloudFile == null)
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throw new ArgumentNullException("cloudFile");
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if (String.IsNullOrWhiteSpace(cloudFile.Account))
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throw new ArgumentNullException("cloudFile");
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if (String.IsNullOrWhiteSpace(cloudFile.Container))
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throw new ArgumentNullException("cloudFile");
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if (String.IsNullOrWhiteSpace(filePath))
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throw new ArgumentNullException("filePath");
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if (!Path.IsPathRooted(filePath))
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throw new ArgumentException("The filePath must be rooted", "filePath");
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Contract.EndContractBlock();
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using (ThreadContext.Stacks["Operation"].Push("DownloadCloudFile"))
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{
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55 |
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// var cancellationToken=_cts.Token;// .ThrowIfCancellationRequested();
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56 |
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57 |
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if (await WaitOrAbort(cloudFile, cancellationToken))
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return;
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var localPath = FileInfoExtensions.GetProperFilePathCapitalization(filePath);
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var relativeUrl = new Uri(cloudFile.Name, UriKind.Relative);
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var url = relativeUrl.ToString();
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if (cloudFile.Name.EndsWith(".ignore", StringComparison.InvariantCultureIgnoreCase))
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return;
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if (!Selectives.IsSelected(cloudFile))
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return;
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//Are we already downloading or uploading the file?
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using (var gate = NetworkGate.Acquire(localPath, NetworkOperation.Downloading))
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{
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if (gate.Failed)
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return;
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var client = new CloudFilesClient(accountInfo);
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var account = cloudFile.Account;
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var container = cloudFile.Container;
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if (cloudFile.IsDirectory)
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{
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if (!Directory.Exists(localPath))
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try
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{
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Directory.CreateDirectory(localPath);
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if (Log.IsDebugEnabled)
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Log.DebugFormat("Created Directory [{0}]", localPath);
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}
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catch (IOException)
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{
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var localInfo = new FileInfo(localPath);
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if (localInfo.Exists && localInfo.Length == 0)
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{
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Log.WarnFormat("Malformed directory object detected for [{0}]", localPath);
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localInfo.Delete();
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Directory.CreateDirectory(localPath);
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if (Log.IsDebugEnabled)
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Log.DebugFormat("Created Directory [{0}]", localPath);
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}
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}
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}
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else
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{
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var isChanged = IsObjectChanged(cloudFile, localPath);
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if (isChanged)
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{
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//Retrieve the hashmap from the server
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var serverHash = await client.GetHashMap(account, container, url);
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//If it's a small file
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if (serverHash.Hashes.Count == 1)
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//Download it in one go
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await
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DownloadEntireFileAsync(accountInfo, client, cloudFile, relativeUrl, localPath,cancellationToken);
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//Otherwise download it block by block
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else
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await
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DownloadWithBlocks(accountInfo, client, cloudFile, relativeUrl, localPath,
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serverHash,cancellationToken);
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if (!cloudFile.IsWritable(accountInfo.UserName))
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{
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var attributes = File.GetAttributes(localPath);
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File.SetAttributes(localPath, attributes | FileAttributes.ReadOnly);
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}
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127 |
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}
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128 |
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}
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//Now we can store the object's metadata without worrying about ghost status entries
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StatusKeeper.StoreInfo(localPath, cloudFile);
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132 |
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}
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}
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135 |
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}
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//Download a file asynchronously using blocks
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public async Task DownloadWithBlocks(AccountInfo accountInfo, CloudFilesClient client, ObjectInfo cloudFile, Uri relativeUrl, string filePath, TreeHash serverHash, CancellationToken cancellationToken)
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140 |
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{
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141 |
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if (client == null)
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throw new ArgumentNullException("client");
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if (cloudFile == null)
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throw new ArgumentNullException("cloudFile");
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if (relativeUrl == null)
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throw new ArgumentNullException("relativeUrl");
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147 |
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if (String.IsNullOrWhiteSpace(filePath))
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throw new ArgumentNullException("filePath");
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149 |
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if (!Path.IsPathRooted(filePath))
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throw new ArgumentException("The filePath must be rooted", "filePath");
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151 |
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if (serverHash == null)
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throw new ArgumentNullException("serverHash");
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153 |
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if (cloudFile.IsDirectory)
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throw new ArgumentException("cloudFile is a directory, not a file", "cloudFile");
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return;
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59 |
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60 |
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var localPath = FileInfoExtensions.GetProperFilePathCapitalization(filePath);
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var relativeUrl = new Uri(cloudFile.Name, UriKind.Relative);
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var url = relativeUrl.ToString();
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if (cloudFile.Name.EndsWith(".ignore", StringComparison.InvariantCultureIgnoreCase))
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return;
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|
67 |
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|
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if (!Selectives.IsSelected(cloudFile))
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return;
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70 |
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71 |
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72 |
//Are we already downloading or uploading the file?
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using (var gate = NetworkGate.Acquire(localPath, NetworkOperation.Downloading))
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{
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|
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if (gate.Failed)
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return;
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|
77 |
|
|
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var client = new CloudFilesClient(accountInfo);
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var account = cloudFile.Account;
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var container = cloudFile.Container;
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|
81 |
|
|
82 |
if (cloudFile.IsDirectory)
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|
83 |
{
|
|
84 |
if (!Directory.Exists(localPath))
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|
85 |
try
|
|
86 |
{
|
|
87 |
Directory.CreateDirectory(localPath);
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|
88 |
if (Log.IsDebugEnabled)
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|
89 |
Log.DebugFormat("Created Directory [{0}]", localPath);
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|
90 |
}
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|
91 |
catch (IOException)
|
|
92 |
{
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|
93 |
var localInfo = new FileInfo(localPath);
|
|
94 |
if (localInfo.Exists && localInfo.Length == 0)
|
|
95 |
{
|
|
96 |
Log.WarnFormat("Malformed directory object detected for [{0}]", localPath);
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|
97 |
localInfo.Delete();
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|
98 |
Directory.CreateDirectory(localPath);
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|
99 |
if (Log.IsDebugEnabled)
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|
100 |
Log.DebugFormat("Created Directory [{0}]", localPath);
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|
101 |
}
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|
102 |
}
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|
103 |
}
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|
104 |
else
|
|
105 |
{
|
|
106 |
var isChanged = IsObjectChanged(cloudFile, localPath);
|
|
107 |
if (isChanged)
|
|
108 |
{
|
|
109 |
//Retrieve the hashmap from the server
|
|
110 |
var serverHash = await client.GetHashMap(account, container, url);
|
|
111 |
//If it's a small file
|
|
112 |
if (serverHash.Hashes.Count == 1)
|
|
113 |
//Download it in one go
|
|
114 |
await
|
|
115 |
DownloadEntireFileAsync(accountInfo, client, cloudFile, relativeUrl, localPath,cancellationToken);
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|
116 |
//Otherwise download it block by block
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|
117 |
else
|
|
118 |
await
|
|
119 |
DownloadWithBlocks(accountInfo, client, cloudFile, relativeUrl, localPath,
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|
120 |
serverHash,cancellationToken);
|
|
121 |
|
|
122 |
if (!cloudFile.IsWritable(accountInfo.UserName))
|
|
123 |
{
|
|
124 |
var attributes = File.GetAttributes(localPath);
|
|
125 |
File.SetAttributes(localPath, attributes | FileAttributes.ReadOnly);
|
|
126 |
}
|
|
127 |
}
|
|
128 |
}
|
|
129 |
|
|
130 |
//Now we can store the object's metadata without worrying about ghost status entries
|
|
131 |
StatusKeeper.StoreInfo(localPath, cloudFile);
|
|
132 |
|
|
133 |
}
|
|
134 |
}
|
|
135 |
|
|
136 |
}
|
|
137 |
|
|
138 |
//Download a file asynchronously using blocks
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|
139 |
public async Task DownloadWithBlocks(AccountInfo accountInfo, CloudFilesClient client, ObjectInfo cloudFile, Uri relativeUrl, string filePath, TreeHash serverHash, CancellationToken cancellationToken)
|
|
140 |
{
|
|
141 |
if (client == null)
|
|
142 |
throw new ArgumentNullException("client");
|
|
143 |
if (cloudFile == null)
|
|
144 |
throw new ArgumentNullException("cloudFile");
|
|
145 |
if (relativeUrl == null)
|
|
146 |
throw new ArgumentNullException("relativeUrl");
|
|
147 |
if (String.IsNullOrWhiteSpace(filePath))
|
|
148 |
throw new ArgumentNullException("filePath");
|
|
149 |
if (!Path.IsPathRooted(filePath))
|
|
150 |
throw new ArgumentException("The filePath must be rooted", "filePath");
|
|
151 |
if (serverHash == null)
|
|
152 |
throw new ArgumentNullException("serverHash");
|
|
153 |
if (cloudFile.IsDirectory)
|
|
154 |
throw new ArgumentException("cloudFile is a directory, not a file", "cloudFile");
|
155 |
155 |
Contract.EndContractBlock();
|
156 |
156 |
|
157 |
157 |
if (await WaitOrAbort(cloudFile, cancellationToken))
|
158 |
|
return;
|
159 |
|
|
160 |
|
var fileAgent = GetFileAgent(accountInfo);
|
161 |
|
var localPath = FileInfoExtensions.GetProperFilePathCapitalization(filePath);
|
162 |
|
|
163 |
|
//Calculate the relative file path for the new file
|
164 |
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var relativePath = relativeUrl.RelativeUriToFilePath();
|
165 |
|
var blockUpdater = new BlockUpdater(fileAgent.CachePath, localPath, relativePath, serverHash);
|
166 |
|
|
167 |
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StatusNotification.SetPithosStatus(PithosStatus.LocalSyncing, String.Format("Calculating hashmap for {0} before download", Path.GetFileName(localPath)));
|
168 |
|
//Calculate the file's treehash
|
169 |
|
|
170 |
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//TODO: Should pass cancellation token here
|
171 |
|
var treeHash = await Signature.CalculateTreeHashAsync(localPath, (int)serverHash.BlockSize, serverHash.BlockHash, 2);
|
172 |
|
|
173 |
|
//And compare it with the server's hash
|
174 |
|
var upHashes = serverHash.GetHashesAsStrings();
|
175 |
|
var localHashes = treeHash.HashDictionary;
|
176 |
|
ReportDownloadProgress(Path.GetFileName(localPath), 0, upHashes.Length, cloudFile.Bytes);
|
177 |
|
for (var i = 0; i < upHashes.Length; i++)
|
|
158 |
return;
|
|
159 |
|
|
160 |
var fileAgent = GetFileAgent(accountInfo);
|
|
161 |
var localPath = FileInfoExtensions.GetProperFilePathCapitalization(filePath);
|
|
162 |
|
|
163 |
//Calculate the relative file path for the new file
|
|
164 |
var relativePath = relativeUrl.RelativeUriToFilePath();
|
|
165 |
var blockUpdater = new BlockUpdater(fileAgent.CachePath, localPath, relativePath, serverHash);
|
|
166 |
|
|
167 |
StatusNotification.SetPithosStatus(PithosStatus.LocalSyncing, String.Format("Calculating hashmap for {0} before download", Path.GetFileName(localPath)));
|
|
168 |
//Calculate the file's treehash
|
|
169 |
|
|
170 |
//TODO: Should pass cancellation token here
|
|
171 |
var treeHash = await Signature.CalculateTreeHashAsync(localPath, (int)serverHash.BlockSize, serverHash.BlockHash, 2);
|
|
172 |
|
|
173 |
//And compare it with the server's hash
|
|
174 |
var upHashes = serverHash.GetHashesAsStrings();
|
|
175 |
var localHashes = treeHash.HashDictionary;
|
|
176 |
ReportDownloadProgress(Path.GetFileName(localPath), 0, upHashes.Length, cloudFile.Bytes);
|
|
177 |
for (var i = 0; i < upHashes.Length; i++)
|
178 |
178 |
{
|
179 |
179 |
if (await WaitOrAbort(cloudFile, cancellationToken))
|
180 |
|
return;
|
181 |
|
|
182 |
|
//For every non-matching hash
|
183 |
|
var upHash = upHashes[i];
|
184 |
|
if (!localHashes.ContainsKey(upHash))
|
185 |
|
{
|
186 |
|
StatusNotification.Notify(new CloudNotification { Data = cloudFile });
|
187 |
|
|
188 |
|
if (blockUpdater.UseOrphan(i, upHash))
|
189 |
|
{
|
190 |
|
Log.InfoFormat("[BLOCK GET] ORPHAN FOUND for {0} of {1} for {2}", i, upHashes.Length, localPath);
|
191 |
|
continue;
|
192 |
|
}
|
193 |
|
Log.InfoFormat("[BLOCK GET] START {0} of {1} for {2}", i, upHashes.Length, localPath);
|
194 |
|
var start = i * serverHash.BlockSize;
|
195 |
|
//To download the last block just pass a null for the end of the range
|
196 |
|
long? end = null;
|
197 |
|
if (i < upHashes.Length - 1)
|
198 |
|
end = ((i + 1) * serverHash.BlockSize);
|
199 |
|
|
200 |
|
//TODO: Pass token here
|
201 |
|
//Download the missing block
|
202 |
|
var block = await client.GetBlock(cloudFile.Account, cloudFile.Container, relativeUrl, start, end,cancellationToken);
|
203 |
|
|
204 |
|
//and store it
|
205 |
|
blockUpdater.StoreBlock(i, block);
|
206 |
|
|
207 |
|
|
208 |
|
Log.InfoFormat("[BLOCK GET] FINISH {0} of {1} for {2}", i, upHashes.Length, localPath);
|
209 |
|
}
|
210 |
|
ReportDownloadProgress(Path.GetFileName(localPath), i, upHashes.Length, cloudFile.Bytes);
|
211 |
|
}
|
212 |
|
|
213 |
|
//Want to avoid notifications if no changes were made
|
214 |
|
var hasChanges = blockUpdater.HasBlocks;
|
215 |
|
blockUpdater.Commit();
|
216 |
|
|
217 |
|
if (hasChanges)
|
218 |
|
//Notify listeners that a local file has changed
|
219 |
|
StatusNotification.NotifyChangedFile(localPath);
|
220 |
|
|
221 |
|
Log.InfoFormat("[BLOCK GET] COMPLETE {0}", localPath);
|
222 |
|
}
|
223 |
|
|
224 |
|
//Download a small file with a single GET operation
|
225 |
|
private async Task DownloadEntireFileAsync(AccountInfo accountInfo, CloudFilesClient client, ObjectInfo cloudFile, Uri relativeUrl, string filePath, CancellationToken cancellationToken)
|
226 |
|
{
|
227 |
|
if (client == null)
|
228 |
|
throw new ArgumentNullException("client");
|
229 |
|
if (cloudFile == null)
|
230 |
|
throw new ArgumentNullException("cloudFile");
|
231 |
|
if (relativeUrl == null)
|
232 |
|
throw new ArgumentNullException("relativeUrl");
|
233 |
|
if (String.IsNullOrWhiteSpace(filePath))
|
234 |
|
throw new ArgumentNullException("filePath");
|
235 |
|
if (!Path.IsPathRooted(filePath))
|
236 |
|
throw new ArgumentException("The localPath must be rooted", "filePath");
|
237 |
|
if (cloudFile.IsDirectory)
|
238 |
|
throw new ArgumentException("cloudFile is a directory, not a file", "cloudFile");
|
|
180 |
return;
|
|
181 |
|
|
182 |
//For every non-matching hash
|
|
183 |
var upHash = upHashes[i];
|
|
184 |
if (!localHashes.ContainsKey(upHash))
|
|
185 |
{
|
|
186 |
StatusNotification.Notify(new CloudNotification { Data = cloudFile });
|
|
187 |
|
|
188 |
if (blockUpdater.UseOrphan(i, upHash))
|
|
189 |
{
|
|
190 |
Log.InfoFormat("[BLOCK GET] ORPHAN FOUND for {0} of {1} for {2}", i, upHashes.Length, localPath);
|
|
191 |
continue;
|
|
192 |
}
|
|
193 |
Log.InfoFormat("[BLOCK GET] START {0} of {1} for {2}", i, upHashes.Length, localPath);
|
|
194 |
var start = i * serverHash.BlockSize;
|
|
195 |
//To download the last block just pass a null for the end of the range
|
|
196 |
long? end = null;
|
|
197 |
if (i < upHashes.Length - 1)
|
|
198 |
end = ((i + 1) * serverHash.BlockSize);
|
|
199 |
|
|
200 |
//TODO: Pass token here
|
|
201 |
//Download the missing block
|
|
202 |
var block = await client.GetBlock(cloudFile.Account, cloudFile.Container, relativeUrl, start, end,cancellationToken);
|
|
203 |
|
|
204 |
//and store it
|
|
205 |
blockUpdater.StoreBlock(i, block);
|
|
206 |
|
|
207 |
|
|
208 |
Log.InfoFormat("[BLOCK GET] FINISH {0} of {1} for {2}", i, upHashes.Length, localPath);
|
|
209 |
}
|
|
210 |
ReportDownloadProgress(Path.GetFileName(localPath), i, upHashes.Length, cloudFile.Bytes);
|
|
211 |
}
|
|
212 |
|
|
213 |
//Want to avoid notifications if no changes were made
|
|
214 |
var hasChanges = blockUpdater.HasBlocks;
|
|
215 |
blockUpdater.Commit();
|
|
216 |
|
|
217 |
if (hasChanges)
|
|
218 |
//Notify listeners that a local file has changed
|
|
219 |
StatusNotification.NotifyChangedFile(localPath);
|
|
220 |
|
|
221 |
Log.InfoFormat("[BLOCK GET] COMPLETE {0}", localPath);
|
|
222 |
}
|
|
223 |
|
|
224 |
//Download a small file with a single GET operation
|
|
225 |
private async Task DownloadEntireFileAsync(AccountInfo accountInfo, CloudFilesClient client, ObjectInfo cloudFile, Uri relativeUrl, string filePath, CancellationToken cancellationToken)
|
|
226 |
{
|
|
227 |
if (client == null)
|
|
228 |
throw new ArgumentNullException("client");
|
|
229 |
if (cloudFile == null)
|
|
230 |
throw new ArgumentNullException("cloudFile");
|
|
231 |
if (relativeUrl == null)
|
|
232 |
throw new ArgumentNullException("relativeUrl");
|
|
233 |
if (String.IsNullOrWhiteSpace(filePath))
|
|
234 |
throw new ArgumentNullException("filePath");
|
|
235 |
if (!Path.IsPathRooted(filePath))
|
|
236 |
throw new ArgumentException("The localPath must be rooted", "filePath");
|
|
237 |
if (cloudFile.IsDirectory)
|
|
238 |
throw new ArgumentException("cloudFile is a directory, not a file", "cloudFile");
|
239 |
239 |
Contract.EndContractBlock();
|
240 |
240 |
|
241 |
241 |
if (await WaitOrAbort(cloudFile, cancellationToken))
|
242 |
|
return;
|
243 |
|
|
244 |
|
var localPath = FileInfoExtensions.GetProperFilePathCapitalization(filePath);
|
245 |
|
StatusNotification.SetPithosStatus(PithosStatus.LocalSyncing, String.Format("Downloading {0}", Path.GetFileName(localPath)));
|
246 |
|
StatusNotification.Notify(new CloudNotification { Data = cloudFile });
|
247 |
|
|
248 |
|
var fileAgent = GetFileAgent(accountInfo);
|
249 |
|
//Calculate the relative file path for the new file
|
250 |
|
var relativePath = relativeUrl.RelativeUriToFilePath();
|
251 |
|
//The file will be stored in a temporary location while downloading with an extension .download
|
252 |
|
var tempPath = Path.Combine(fileAgent.CachePath, relativePath + ".download");
|
253 |
|
//Make sure the target folder exists. DownloadFileTask will not create the folder
|
254 |
|
var tempFolder = Path.GetDirectoryName(tempPath);
|
255 |
|
if (!Directory.Exists(tempFolder))
|
256 |
|
Directory.CreateDirectory(tempFolder);
|
257 |
|
|
258 |
|
//TODO: Should pass the token here
|
259 |
|
|
260 |
|
//Download the object to the temporary location
|
261 |
|
await client.GetObject(cloudFile.Account, cloudFile.Container, relativeUrl.ToString(), tempPath,cancellationToken);
|
262 |
|
|
263 |
|
//Create the local folder if it doesn't exist (necessary for shared objects)
|
264 |
|
var localFolder = Path.GetDirectoryName(localPath);
|
265 |
|
if (!Directory.Exists(localFolder))
|
266 |
|
try
|
267 |
|
{
|
268 |
|
Directory.CreateDirectory(localFolder);
|
269 |
|
}
|
270 |
|
catch (IOException)
|
271 |
|
{
|
272 |
|
//A file may already exist that has the same name as the new folder.
|
273 |
|
//This may be an artifact of the way Pithos handles directories
|
274 |
|
var fileInfo = new FileInfo(localFolder);
|
275 |
|
if (fileInfo.Exists && fileInfo.Length == 0)
|
276 |
|
{
|
277 |
|
Log.WarnFormat("Malformed directory object detected for [{0}]", localFolder);
|
278 |
|
fileInfo.Delete();
|
279 |
|
Directory.CreateDirectory(localFolder);
|
280 |
|
}
|
281 |
|
else
|
282 |
|
throw;
|
283 |
|
}
|
284 |
|
//And move it to its actual location once downloading is finished
|
285 |
|
if (File.Exists(localPath))
|
286 |
|
File.Replace(tempPath, localPath, null, true);
|
287 |
|
else
|
288 |
|
File.Move(tempPath, localPath);
|
289 |
|
//Notify listeners that a local file has changed
|
290 |
|
StatusNotification.NotifyChangedFile(localPath);
|
291 |
|
|
292 |
|
|
293 |
|
}
|
294 |
|
|
295 |
|
|
296 |
|
private void ReportDownloadProgress(string fileName, int block, int totalBlocks, long fileSize)
|
297 |
|
{
|
298 |
|
StatusNotification.Notify(totalBlocks == 0
|
299 |
|
? new ProgressNotification(fileName, "Downloading", 1, 1, fileSize)
|
300 |
|
: new ProgressNotification(fileName, "Downloading", block, totalBlocks, fileSize));
|
301 |
|
}
|
302 |
|
|
303 |
|
private bool IsObjectChanged(ObjectInfo cloudFile, string localPath)
|
304 |
|
{
|
305 |
|
//If the target is a directory, there are no changes to download
|
306 |
|
if (Directory.Exists(localPath))
|
307 |
|
return false;
|
308 |
|
//If the file doesn't exist, we have a chagne
|
309 |
|
if (!File.Exists(localPath))
|
310 |
|
return true;
|
311 |
|
//If there is no stored state, we have a change
|
312 |
|
var localState = StatusKeeper.GetStateByFilePath(localPath);
|
313 |
|
if (localState == null)
|
314 |
|
return true;
|
315 |
|
|
316 |
|
var info = new FileInfo(localPath);
|
317 |
|
var shortHash = info.ComputeShortHash();
|
318 |
|
//If the file is different from the stored state, we have a change
|
319 |
|
if (localState.ShortHash != shortHash)
|
320 |
|
return true;
|
321 |
|
//If the top hashes differ, we have a change
|
322 |
|
return (localState.Checksum != cloudFile.Hash);
|
323 |
|
}
|
324 |
|
|
325 |
|
private static FileAgent GetFileAgent(AccountInfo accountInfo)
|
326 |
|
{
|
327 |
|
return AgentLocator<FileAgent>.Get(accountInfo.AccountPath);
|
|
242 |
return;
|
|
243 |
|
|
244 |
var localPath = FileInfoExtensions.GetProperFilePathCapitalization(filePath);
|
|
245 |
StatusNotification.SetPithosStatus(PithosStatus.LocalSyncing, String.Format("Downloading {0}", Path.GetFileName(localPath)));
|
|
246 |
StatusNotification.Notify(new CloudNotification { Data = cloudFile });
|
|
247 |
|
|
248 |
var fileAgent = GetFileAgent(accountInfo);
|
|
249 |
//Calculate the relative file path for the new file
|
|
250 |
var relativePath = relativeUrl.RelativeUriToFilePath();
|
|
251 |
//The file will be stored in a temporary location while downloading with an extension .download
|
|
252 |
var tempPath = Path.Combine(fileAgent.CachePath, relativePath + ".download");
|
|
253 |
//Make sure the target folder exists. DownloadFileTask will not create the folder
|
|
254 |
var tempFolder = Path.GetDirectoryName(tempPath);
|
|
255 |
if (!Directory.Exists(tempFolder))
|
|
256 |
Directory.CreateDirectory(tempFolder);
|
|
257 |
|
|
258 |
//TODO: Should pass the token here
|
|
259 |
|
|
260 |
//Download the object to the temporary location
|
|
261 |
await client.GetObject(cloudFile.Account, cloudFile.Container, relativeUrl.ToString(), tempPath,cancellationToken);
|
|
262 |
|
|
263 |
//Create the local folder if it doesn't exist (necessary for shared objects)
|
|
264 |
var localFolder = Path.GetDirectoryName(localPath);
|
|
265 |
if (!Directory.Exists(localFolder))
|
|
266 |
try
|
|
267 |
{
|
|
268 |
Directory.CreateDirectory(localFolder);
|
|
269 |
}
|
|
270 |
catch (IOException)
|
|
271 |
{
|
|
272 |
//A file may already exist that has the same name as the new folder.
|
|
273 |
//This may be an artifact of the way Pithos handles directories
|
|
274 |
var fileInfo = new FileInfo(localFolder);
|
|
275 |
if (fileInfo.Exists && fileInfo.Length == 0)
|
|
276 |
{
|
|
277 |
Log.WarnFormat("Malformed directory object detected for [{0}]", localFolder);
|
|
278 |
fileInfo.Delete();
|
|
279 |
Directory.CreateDirectory(localFolder);
|
|
280 |
}
|
|
281 |
else
|
|
282 |
throw;
|
|
283 |
}
|
|
284 |
//And move it to its actual location once downloading is finished
|
|
285 |
if (File.Exists(localPath))
|
|
286 |
File.Replace(tempPath, localPath, null, true);
|
|
287 |
else
|
|
288 |
File.Move(tempPath, localPath);
|
|
289 |
//Notify listeners that a local file has changed
|
|
290 |
StatusNotification.NotifyChangedFile(localPath);
|
|
291 |
|
|
292 |
|
|
293 |
}
|
|
294 |
|
|
295 |
|
|
296 |
private void ReportDownloadProgress(string fileName, int block, int totalBlocks, long fileSize)
|
|
297 |
{
|
|
298 |
StatusNotification.Notify(totalBlocks == 0
|
|
299 |
? new ProgressNotification(fileName, "Downloading", 1, 1, fileSize)
|
|
300 |
: new ProgressNotification(fileName, "Downloading", block, totalBlocks, fileSize));
|
|
301 |
}
|
|
302 |
|
|
303 |
private bool IsObjectChanged(ObjectInfo cloudFile, string localPath)
|
|
304 |
{
|
|
305 |
//If the target is a directory, there are no changes to download
|
|
306 |
if (Directory.Exists(localPath))
|
|
307 |
return false;
|
|
308 |
//If the file doesn't exist, we have a chagne
|
|
309 |
if (!File.Exists(localPath))
|
|
310 |
return true;
|
|
311 |
//If there is no stored state, we have a change
|
|
312 |
var localState = StatusKeeper.GetStateByFilePath(localPath);
|
|
313 |
if (localState == null)
|
|
314 |
return true;
|
|
315 |
|
|
316 |
var info = new FileInfo(localPath);
|
|
317 |
var shortHash = info.ComputeShortHash();
|
|
318 |
//If the file is different from the stored state, we have a change
|
|
319 |
if (localState.ShortHash != shortHash)
|
|
320 |
return true;
|
|
321 |
//If the top hashes differ, we have a change
|
|
322 |
return (localState.Checksum != cloudFile.Hash);
|
|
323 |
}
|
|
324 |
|
|
325 |
private static FileAgent GetFileAgent(AccountInfo accountInfo)
|
|
326 |
{
|
|
327 |
return AgentLocator<FileAgent>.Get(accountInfo.AccountPath);
|
328 |
328 |
}
|
329 |
329 |
|
330 |
330 |
private async Task<bool> WaitOrAbort(ObjectInfo cloudFile, CancellationToken token)
|
... | ... | |
335 |
335 |
if (shouldAbort)
|
336 |
336 |
Log.InfoFormat("Aborting [{0}]", cloudFile.Uri);
|
337 |
337 |
return shouldAbort;
|
338 |
|
}
|
339 |
|
|
340 |
|
[Import]
|
341 |
|
public Selectives Selectives { get; set; }
|
342 |
|
|
343 |
|
public AsyncManualResetEvent UnpauseEvent { get; set; }
|
344 |
|
}
|
345 |
|
}
|
|
338 |
}
|
|
339 |
|
|
340 |
[Import]
|
|
341 |
public Selectives Selectives { get; set; }
|
|
342 |
|
|
343 |
public AsyncManualResetEvent UnpauseEvent { get; set; }
|
|
344 |
}
|
|
345 |
}
|