jellyfin-server/Emby.Common.Implementations/IO/ManagedFileSystem.cs

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C#
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.Logging;
namespace Emby.Common.Implementations.IO
{
/// <summary>
/// Class ManagedFileSystem
/// </summary>
public class ManagedFileSystem : IFileSystem
{
protected ILogger Logger;
private readonly bool _supportsAsyncFileStreams;
private char[] _invalidFileNameChars;
private readonly List<IShortcutHandler> _shortcutHandlers = new List<IShortcutHandler>();
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private bool EnableFileSystemRequestConcat = true;
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public ManagedFileSystem(ILogger logger, bool supportsAsyncFileStreams, bool enableManagedInvalidFileNameChars, bool enableFileSystemRequestConcat)
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{
Logger = logger;
_supportsAsyncFileStreams = supportsAsyncFileStreams;
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EnableFileSystemRequestConcat = enableFileSystemRequestConcat;
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SetInvalidFileNameChars(enableManagedInvalidFileNameChars);
}
public void AddShortcutHandler(IShortcutHandler handler)
{
_shortcutHandlers.Add(handler);
}
protected void SetInvalidFileNameChars(bool enableManagedInvalidFileNameChars)
{
if (enableManagedInvalidFileNameChars)
{
_invalidFileNameChars = Path.GetInvalidFileNameChars();
}
else
{
// GetInvalidFileNameChars is less restrictive in Linux/Mac than Windows, this mimic Windows behavior for mono under Linux/Mac.
_invalidFileNameChars = new char[41] { '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
'\x08', '\x09', '\x0A', '\x0B', '\x0C', '\x0D', '\x0E', '\x0F', '\x10', '\x11', '\x12',
'\x13', '\x14', '\x15', '\x16', '\x17', '\x18', '\x19', '\x1A', '\x1B', '\x1C', '\x1D',
'\x1E', '\x1F', '\x22', '\x3C', '\x3E', '\x7C', ':', '*', '?', '\\', '/' };
}
}
public char DirectorySeparatorChar
{
get
{
return Path.DirectorySeparatorChar;
}
}
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public char PathSeparator
{
get
{
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return Path.PathSeparator;
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}
}
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public string GetFullPath(string path)
{
return Path.GetFullPath(path);
}
/// <summary>
/// Determines whether the specified filename is shortcut.
/// </summary>
/// <param name="filename">The filename.</param>
/// <returns><c>true</c> if the specified filename is shortcut; otherwise, <c>false</c>.</returns>
/// <exception cref="System.ArgumentNullException">filename</exception>
public virtual bool IsShortcut(string filename)
{
if (string.IsNullOrEmpty(filename))
{
throw new ArgumentNullException("filename");
}
var extension = Path.GetExtension(filename);
return _shortcutHandlers.Any(i => string.Equals(extension, i.Extension, StringComparison.OrdinalIgnoreCase));
}
/// <summary>
/// Resolves the shortcut.
/// </summary>
/// <param name="filename">The filename.</param>
/// <returns>System.String.</returns>
/// <exception cref="System.ArgumentNullException">filename</exception>
public virtual string ResolveShortcut(string filename)
{
if (string.IsNullOrEmpty(filename))
{
throw new ArgumentNullException("filename");
}
var extension = Path.GetExtension(filename);
var handler = _shortcutHandlers.FirstOrDefault(i => string.Equals(extension, i.Extension, StringComparison.OrdinalIgnoreCase));
if (handler != null)
{
return handler.Resolve(filename);
}
return null;
}
/// <summary>
/// Creates the shortcut.
/// </summary>
/// <param name="shortcutPath">The shortcut path.</param>
/// <param name="target">The target.</param>
/// <exception cref="System.ArgumentNullException">
/// shortcutPath
/// or
/// target
/// </exception>
public void CreateShortcut(string shortcutPath, string target)
{
if (string.IsNullOrEmpty(shortcutPath))
{
throw new ArgumentNullException("shortcutPath");
}
if (string.IsNullOrEmpty(target))
{
throw new ArgumentNullException("target");
}
var extension = Path.GetExtension(shortcutPath);
var handler = _shortcutHandlers.FirstOrDefault(i => string.Equals(extension, i.Extension, StringComparison.OrdinalIgnoreCase));
if (handler != null)
{
handler.Create(shortcutPath, target);
}
else
{
throw new NotImplementedException();
}
}
/// <summary>
/// Returns a <see cref="FileSystemMetadata"/> object for the specified file or directory path.
/// </summary>
/// <param name="path">A path to a file or directory.</param>
/// <returns>A <see cref="FileSystemMetadata"/> object.</returns>
/// <remarks>If the specified path points to a directory, the returned <see cref="FileSystemMetadata"/> object's
/// <see cref="FileSystemMetadata.IsDirectory"/> property will be set to true and all other properties will reflect the properties of the directory.</remarks>
public FileSystemMetadata GetFileSystemInfo(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
// Take a guess to try and avoid two file system hits, but we'll double-check by calling Exists
if (Path.HasExtension(path))
{
var fileInfo = new FileInfo(path);
if (fileInfo.Exists)
{
return GetFileSystemMetadata(fileInfo);
}
return GetFileSystemMetadata(new DirectoryInfo(path));
}
else
{
var fileInfo = new DirectoryInfo(path);
if (fileInfo.Exists)
{
return GetFileSystemMetadata(fileInfo);
}
return GetFileSystemMetadata(new FileInfo(path));
}
}
/// <summary>
/// Returns a <see cref="FileSystemMetadata"/> object for the specified file path.
/// </summary>
/// <param name="path">A path to a file.</param>
/// <returns>A <see cref="FileSystemMetadata"/> object.</returns>
/// <remarks><para>If the specified path points to a directory, the returned <see cref="FileSystemMetadata"/> object's
/// <see cref="FileSystemMetadata.IsDirectory"/> property and the <see cref="FileSystemMetadata.Exists"/> property will both be set to false.</para>
/// <para>For automatic handling of files <b>and</b> directories, use <see cref="GetFileSystemInfo"/>.</para></remarks>
public FileSystemMetadata GetFileInfo(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
var fileInfo = new FileInfo(path);
return GetFileSystemMetadata(fileInfo);
}
/// <summary>
/// Returns a <see cref="FileSystemMetadata"/> object for the specified directory path.
/// </summary>
/// <param name="path">A path to a directory.</param>
/// <returns>A <see cref="FileSystemMetadata"/> object.</returns>
/// <remarks><para>If the specified path points to a file, the returned <see cref="FileSystemMetadata"/> object's
/// <see cref="FileSystemMetadata.IsDirectory"/> property will be set to true and the <see cref="FileSystemMetadata.Exists"/> property will be set to false.</para>
/// <para>For automatic handling of files <b>and</b> directories, use <see cref="GetFileSystemInfo"/>.</para></remarks>
public FileSystemMetadata GetDirectoryInfo(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
var fileInfo = new DirectoryInfo(path);
return GetFileSystemMetadata(fileInfo);
}
private FileSystemMetadata GetFileSystemMetadata(FileSystemInfo info)
{
var result = new FileSystemMetadata();
result.Exists = info.Exists;
result.FullName = info.FullName;
result.Extension = info.Extension;
result.Name = info.Name;
if (result.Exists)
{
var attributes = info.Attributes;
result.IsDirectory = info is DirectoryInfo || (attributes & FileAttributes.Directory) == FileAttributes.Directory;
result.IsHidden = (attributes & FileAttributes.Hidden) == FileAttributes.Hidden;
result.IsReadOnly = (attributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly;
var fileInfo = info as FileInfo;
if (fileInfo != null)
{
result.Length = fileInfo.Length;
result.DirectoryName = fileInfo.DirectoryName;
}
result.CreationTimeUtc = GetCreationTimeUtc(info);
result.LastWriteTimeUtc = GetLastWriteTimeUtc(info);
}
else
{
result.IsDirectory = info is DirectoryInfo;
}
return result;
}
/// <summary>
/// The space char
/// </summary>
private const char SpaceChar = ' ';
/// <summary>
/// Takes a filename and removes invalid characters
/// </summary>
/// <param name="filename">The filename.</param>
/// <returns>System.String.</returns>
/// <exception cref="System.ArgumentNullException">filename</exception>
public string GetValidFilename(string filename)
{
if (string.IsNullOrEmpty(filename))
{
throw new ArgumentNullException("filename");
}
var builder = new StringBuilder(filename);
foreach (var c in _invalidFileNameChars)
{
builder = builder.Replace(c, SpaceChar);
}
return builder.ToString();
}
/// <summary>
/// Gets the creation time UTC.
/// </summary>
/// <param name="info">The info.</param>
/// <returns>DateTime.</returns>
public DateTime GetCreationTimeUtc(FileSystemInfo info)
{
// This could throw an error on some file systems that have dates out of range
try
{
return info.CreationTimeUtc;
}
catch (Exception ex)
{
Logger.ErrorException("Error determining CreationTimeUtc for {0}", ex, info.FullName);
return DateTime.MinValue;
}
}
/// <summary>
/// Gets the creation time UTC.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>DateTime.</returns>
public DateTime GetCreationTimeUtc(string path)
{
return GetCreationTimeUtc(GetFileSystemInfo(path));
}
public DateTime GetCreationTimeUtc(FileSystemMetadata info)
{
return info.CreationTimeUtc;
}
public DateTime GetLastWriteTimeUtc(FileSystemMetadata info)
{
return info.LastWriteTimeUtc;
}
/// <summary>
/// Gets the creation time UTC.
/// </summary>
/// <param name="info">The info.</param>
/// <returns>DateTime.</returns>
public DateTime GetLastWriteTimeUtc(FileSystemInfo info)
{
// This could throw an error on some file systems that have dates out of range
try
{
return info.LastWriteTimeUtc;
}
catch (Exception ex)
{
Logger.ErrorException("Error determining LastAccessTimeUtc for {0}", ex, info.FullName);
return DateTime.MinValue;
}
}
/// <summary>
/// Gets the last write time UTC.
/// </summary>
/// <param name="path">The path.</param>
/// <returns>DateTime.</returns>
public DateTime GetLastWriteTimeUtc(string path)
{
return GetLastWriteTimeUtc(GetFileSystemInfo(path));
}
/// <summary>
/// Gets the file stream.
/// </summary>
/// <param name="path">The path.</param>
/// <param name="mode">The mode.</param>
/// <param name="access">The access.</param>
/// <param name="share">The share.</param>
/// <param name="isAsync">if set to <c>true</c> [is asynchronous].</param>
/// <returns>FileStream.</returns>
public Stream GetFileStream(string path, FileOpenMode mode, FileAccessMode access, FileShareMode share, bool isAsync = false)
{
if (_supportsAsyncFileStreams && isAsync)
{
return new FileStream(path, GetFileMode(mode), GetFileAccess(access), GetFileShare(share), 262144, true);
}
return new FileStream(path, GetFileMode(mode), GetFileAccess(access), GetFileShare(share), 262144);
}
private FileMode GetFileMode(FileOpenMode mode)
{
switch (mode)
{
case FileOpenMode.Append:
return FileMode.Append;
case FileOpenMode.Create:
return FileMode.Create;
case FileOpenMode.CreateNew:
return FileMode.CreateNew;
case FileOpenMode.Open:
return FileMode.Open;
case FileOpenMode.OpenOrCreate:
return FileMode.OpenOrCreate;
case FileOpenMode.Truncate:
return FileMode.Truncate;
default:
throw new Exception("Unrecognized FileOpenMode");
}
}
private FileAccess GetFileAccess(FileAccessMode mode)
{
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switch (mode)
{
case FileAccessMode.ReadWrite:
return FileAccess.ReadWrite;
case FileAccessMode.Write:
return FileAccess.Write;
case FileAccessMode.Read:
return FileAccess.Read;
default:
throw new Exception("Unrecognized FileAccessMode");
}
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}
private FileShare GetFileShare(FileShareMode mode)
{
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switch (mode)
{
case FileShareMode.ReadWrite:
return FileShare.ReadWrite;
case FileShareMode.Write:
return FileShare.Write;
case FileShareMode.Read:
return FileShare.Read;
case FileShareMode.None:
return FileShare.None;
default:
throw new Exception("Unrecognized FileShareMode");
}
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}
public void SetHidden(string path, bool isHidden)
{
var info = GetFileInfo(path);
if (info.Exists && info.IsHidden != isHidden)
{
if (isHidden)
{
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File.SetAttributes(path, File.GetAttributes(path) | FileAttributes.Hidden);
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}
else
{
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FileAttributes attributes = File.GetAttributes(path);
attributes = RemoveAttribute(attributes, FileAttributes.Hidden);
File.SetAttributes(path, attributes);
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}
}
}
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public void SetReadOnly(string path, bool isReadOnly)
{
var info = GetFileInfo(path);
if (info.Exists && info.IsReadOnly != isReadOnly)
{
if (isReadOnly)
{
File.SetAttributes(path, File.GetAttributes(path) | FileAttributes.ReadOnly);
}
else
{
FileAttributes attributes = File.GetAttributes(path);
attributes = RemoveAttribute(attributes, FileAttributes.ReadOnly);
File.SetAttributes(path, attributes);
}
}
}
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private static FileAttributes RemoveAttribute(FileAttributes attributes, FileAttributes attributesToRemove)
{
return attributes & ~attributesToRemove;
}
/// <summary>
/// Swaps the files.
/// </summary>
/// <param name="file1">The file1.</param>
/// <param name="file2">The file2.</param>
public void SwapFiles(string file1, string file2)
{
if (string.IsNullOrEmpty(file1))
{
throw new ArgumentNullException("file1");
}
if (string.IsNullOrEmpty(file2))
{
throw new ArgumentNullException("file2");
}
var temp1 = Path.GetTempFileName();
var temp2 = Path.GetTempFileName();
// Copying over will fail against hidden files
RemoveHiddenAttribute(file1);
RemoveHiddenAttribute(file2);
CopyFile(file1, temp1, true);
CopyFile(file2, temp2, true);
CopyFile(temp1, file2, true);
CopyFile(temp2, file1, true);
DeleteFile(temp1);
DeleteFile(temp2);
}
/// <summary>
/// Removes the hidden attribute.
/// </summary>
/// <param name="path">The path.</param>
private void RemoveHiddenAttribute(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
var currentFile = new FileInfo(path);
// This will fail if the file is hidden
if (currentFile.Exists)
{
if ((currentFile.Attributes & FileAttributes.Hidden) == FileAttributes.Hidden)
{
currentFile.Attributes &= ~FileAttributes.Hidden;
}
}
}
public bool ContainsSubPath(string parentPath, string path)
{
if (string.IsNullOrEmpty(parentPath))
{
throw new ArgumentNullException("parentPath");
}
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
return path.IndexOf(parentPath.TrimEnd(Path.DirectorySeparatorChar) + Path.DirectorySeparatorChar, StringComparison.OrdinalIgnoreCase) != -1;
}
public bool IsRootPath(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
var parent = Path.GetDirectoryName(path);
if (!string.IsNullOrEmpty(parent))
{
return false;
}
return true;
}
public string NormalizePath(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException("path");
}
if (path.EndsWith(":\\", StringComparison.OrdinalIgnoreCase))
{
return path;
}
return path.TrimEnd(Path.DirectorySeparatorChar);
}
public string GetFileNameWithoutExtension(FileSystemMetadata info)
{
if (info.IsDirectory)
{
return info.Name;
}
return Path.GetFileNameWithoutExtension(info.FullName);
}
public string GetFileNameWithoutExtension(string path)
{
return Path.GetFileNameWithoutExtension(path);
}
public bool IsPathFile(string path)
{
if (string.IsNullOrWhiteSpace(path))
{
throw new ArgumentNullException("path");
}
// Cannot use Path.IsPathRooted because it returns false under mono when using windows-based paths, e.g. C:\\
if (path.IndexOf("://", StringComparison.OrdinalIgnoreCase) != -1 &&
!path.StartsWith("file://", StringComparison.OrdinalIgnoreCase))
{
return false;
}
return true;
//return Path.IsPathRooted(path);
}
public void DeleteFile(string path)
{
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var fileInfo = GetFileInfo(path);
if (fileInfo.Exists)
{
if (fileInfo.IsHidden)
{
SetHidden(path, false);
}
if (fileInfo.IsReadOnly)
{
SetReadOnly(path, false);
}
}
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File.Delete(path);
}
public void DeleteDirectory(string path, bool recursive)
{
Directory.Delete(path, recursive);
}
public void CreateDirectory(string path)
{
Directory.CreateDirectory(path);
}
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public List<FileSystemMetadata> GetDrives()
{
// Only include drives in the ready state or this method could end up being very slow, waiting for drives to timeout
return DriveInfo.GetDrives().Where(d => d.IsReady).Select(d => new FileSystemMetadata
{
Name = GetName(d),
FullName = d.RootDirectory.FullName,
IsDirectory = true
}).ToList();
}
private string GetName(DriveInfo drive)
{
return drive.Name;
}
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public IEnumerable<FileSystemMetadata> GetDirectories(string path, bool recursive = false)
{
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
return ToMetadata(path, new DirectoryInfo(path).EnumerateDirectories("*", searchOption));
}
public IEnumerable<FileSystemMetadata> GetFiles(string path, bool recursive = false)
{
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
return ToMetadata(path, new DirectoryInfo(path).EnumerateFiles("*", searchOption));
}
public IEnumerable<FileSystemMetadata> GetFileSystemEntries(string path, bool recursive = false)
{
var directoryInfo = new DirectoryInfo(path);
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
if (EnableFileSystemRequestConcat)
{
return ToMetadata(path, directoryInfo.EnumerateDirectories("*", searchOption))
.Concat(ToMetadata(path, directoryInfo.EnumerateFiles("*", searchOption)));
}
return ToMetadata(path, directoryInfo.EnumerateFileSystemInfos("*", searchOption));
}
private IEnumerable<FileSystemMetadata> ToMetadata(string parentPath, IEnumerable<FileSystemInfo> infos)
{
return infos.Select(i =>
{
try
{
return GetFileSystemMetadata(i);
}
catch (PathTooLongException)
{
// Can't log using the FullName because it will throw the PathTooLongExceptiona again
//Logger.Warn("Path too long: {0}", i.FullName);
Logger.Warn("File or directory path too long. Parent folder: {0}", parentPath);
return null;
}
}).Where(i => i != null);
}
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public string[] ReadAllLines(string path)
{
return File.ReadAllLines(path);
}
public void WriteAllLines(string path, IEnumerable<string> lines)
{
File.WriteAllLines(path, lines);
}
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public Stream OpenRead(string path)
{
return File.OpenRead(path);
}
public void CopyFile(string source, string target, bool overwrite)
{
File.Copy(source, target, overwrite);
}
public void MoveFile(string source, string target)
{
File.Move(source, target);
}
public void MoveDirectory(string source, string target)
{
Directory.Move(source, target);
}
public bool DirectoryExists(string path)
{
return Directory.Exists(path);
}
public bool FileExists(string path)
{
return File.Exists(path);
}
public string ReadAllText(string path)
{
return File.ReadAllText(path);
}
public byte[] ReadAllBytes(string path)
{
return File.ReadAllBytes(path);
}
public void WriteAllText(string path, string text, Encoding encoding)
{
File.WriteAllText(path, text, encoding);
}
public void WriteAllText(string path, string text)
{
File.WriteAllText(path, text);
}
public void WriteAllBytes(string path, byte[] bytes)
{
File.WriteAllBytes(path, bytes);
}
public string ReadAllText(string path, Encoding encoding)
{
return File.ReadAllText(path, encoding);
}
public IEnumerable<string> GetDirectoryPaths(string path, bool recursive = false)
{
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
return Directory.EnumerateDirectories(path, "*", searchOption);
}
public IEnumerable<string> GetFilePaths(string path, bool recursive = false)
{
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
return Directory.EnumerateFiles(path, "*", searchOption);
}
public IEnumerable<string> GetFileSystemEntryPaths(string path, bool recursive = false)
{
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
return Directory.EnumerateFileSystemEntries(path, "*", searchOption);
}
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public virtual void SetExecutable(string path)
{
}
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}
}