keepass2android/src/Kp2aBusinessLogic/Io/BuiltInFileStorage.cs

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C#
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using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using KeePassLib.Serialization;
using KeePassLib.Utility;
namespace keepass2android.Io
{
public class BuiltInFileStorage: IFileStorage
{
public IEnumerable<string> SupportedProtocols
{
get
{
yield return "file";
yield return "ftp";
yield return "http";
yield return "https";
}
}
public void DeleteFile(IOConnectionInfo ioc)
{
IOConnection.DeleteFile(ioc);
}
public bool CheckForFileChangeFast(IOConnectionInfo ioc, string previousFileVersion)
{
if (!ioc.IsLocalFile())
return false;
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if (previousFileVersion == null)
return false;
DateTime previousDate;
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if (!DateTime.TryParse(previousFileVersion, CultureInfo.InvariantCulture, DateTimeStyles.None, out previousDate))
return false;
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DateTime currentModificationDate = File.GetLastWriteTimeUtc(ioc.Path);
TimeSpan diff = currentModificationDate - previousDate;
return diff > TimeSpan.FromSeconds(1);
//don't use > operator because milliseconds are truncated
//return File.GetLastWriteTimeUtc(ioc.Path) - previousDate >= TimeSpan.FromSeconds(1);
}
public string GetCurrentFileVersionFast(IOConnectionInfo ioc)
{
if (ioc.IsLocalFile())
{
return File.GetLastWriteTimeUtc(ioc.Path).ToString(CultureInfo.InvariantCulture);
}
else
{
return DateTime.MinValue.ToString(CultureInfo.InvariantCulture);
}
}
public Stream OpenFileForRead(IOConnectionInfo ioc)
{
try
{
return IOConnection.OpenRead(ioc);
}
catch (WebException ex)
{
if ((ex.Response is HttpWebResponse) && (((HttpWebResponse)ex.Response).StatusCode == HttpStatusCode.NotFound))
{
throw new FileNotFoundException(ex.Message, ioc.Path, ex);
}
throw;
}
}
public IWriteTransaction OpenWriteTransaction(IOConnectionInfo ioc, bool useFileTransaction)
{
return new BuiltInFileTransaction(ioc, useFileTransaction);
}
public IFileStorageSetup RequiredSetup { get { return null; } }
public class BuiltInFileTransaction : IWriteTransaction
{
private readonly FileTransactionEx _transaction;
public BuiltInFileTransaction(IOConnectionInfo ioc, bool useFileTransaction)
{
_transaction = new FileTransactionEx(ioc, useFileTransaction);
}
public void Dispose()
{
}
public Stream OpenFile()
{
return _transaction.OpenWrite();
}
public void CommitWrite()
{
_transaction.CommitWrite();
}
}
public bool CompleteIoId()
{
throw new NotImplementedException();
}
public bool? FileExists()
{
throw new NotImplementedException();
}
public string GetFilenameWithoutPathAndExt(IOConnectionInfo ioc)
{
return UrlUtil.StripExtension(
UrlUtil.GetFileName(ioc.Path));
}
public bool RequiresCredentials(IOConnectionInfo ioc)
{
return (!ioc.IsLocalFile()) && (ioc.CredSaveMode != IOCredSaveMode.SaveCred);
}
}
}