using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.System;
using Microsoft.Extensions.Logging;
namespace Emby.Server.Implementations.IO
{
///
/// Class ManagedFileSystem
///
public class ManagedFileSystem : IFileSystem
{
protected ILogger Logger;
private readonly bool _supportsAsyncFileStreams;
private char[] _invalidFileNameChars;
private readonly List _shortcutHandlers = new List();
private bool EnableSeparateFileAndDirectoryQueries;
private string _tempPath;
private IEnvironmentInfo _environmentInfo;
private bool _isEnvironmentCaseInsensitive;
private string _defaultDirectory;
public ManagedFileSystem(
ILoggerFactory loggerFactory,
IEnvironmentInfo environmentInfo,
string defaultDirectory,
string tempPath,
bool enableSeparateFileAndDirectoryQueries)
{
Logger = loggerFactory.CreateLogger("FileSystem");
_supportsAsyncFileStreams = true;
_tempPath = tempPath;
_environmentInfo = environmentInfo;
_defaultDirectory = defaultDirectory;
// On Linux with mono, this needs to be true or symbolic links are ignored
EnableSeparateFileAndDirectoryQueries = enableSeparateFileAndDirectoryQueries;
SetInvalidFileNameChars(environmentInfo.OperatingSystem == MediaBrowser.Model.System.OperatingSystem.Windows);
_isEnvironmentCaseInsensitive = environmentInfo.OperatingSystem == MediaBrowser.Model.System.OperatingSystem.Windows;
}
public string DefaultDirectory
{
get
{
var value = _defaultDirectory;
if (!string.IsNullOrEmpty(value))
{
try
{
if (DirectoryExists(value))
{
return value;
}
}
catch
{
}
}
return null;
}
}
public void AddShortcutHandler(IShortcutHandler handler)
{
_shortcutHandlers.Add(handler);
}
protected void SetInvalidFileNameChars(bool enableManagedInvalidFileNameChars)
{
if (enableManagedInvalidFileNameChars)
{
_invalidFileNameChars = Path.GetInvalidFileNameChars();
}
else
{
// Be consistent across platforms because the windows server will fail to query network shares that don't follow windows conventions
// https://referencesource.microsoft.com/#mscorlib/system/io/path.cs
_invalidFileNameChars = new char[] { '\"', '<', '>', '|', '\0', (char)1, (char)2, (char)3, (char)4, (char)5, (char)6, (char)7, (char)8, (char)9, (char)10, (char)11, (char)12, (char)13, (char)14, (char)15, (char)16, (char)17, (char)18, (char)19, (char)20, (char)21, (char)22, (char)23, (char)24, (char)25, (char)26, (char)27, (char)28, (char)29, (char)30, (char)31, ':', '*', '?', '\\', '/' };
}
}
public char DirectorySeparatorChar => Path.DirectorySeparatorChar;
public string GetFullPath(string path)
{
return Path.GetFullPath(path);
}
///
/// Determines whether the specified filename is shortcut.
///
/// The filename.
/// true if the specified filename is shortcut; otherwise, false.
/// filename
public virtual bool IsShortcut(string filename)
{
if (string.IsNullOrEmpty(filename))
{
throw new ArgumentNullException(nameof(filename));
}
var extension = Path.GetExtension(filename);
return _shortcutHandlers.Any(i => string.Equals(extension, i.Extension, StringComparison.OrdinalIgnoreCase));
}
///
/// Resolves the shortcut.
///
/// The filename.
/// System.String.
/// filename
public virtual string ResolveShortcut(string filename)
{
if (string.IsNullOrEmpty(filename))
{
throw new ArgumentNullException(nameof(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;
}
public string MakeAbsolutePath(string folderPath, string filePath)
{
if (string.IsNullOrWhiteSpace(filePath)) return filePath;
if (filePath.Contains(@"://")) return filePath; //stream
if (filePath.Length > 3 && filePath[1] == ':' && filePath[2] == '/') return filePath; //absolute local path
// unc path
if (filePath.StartsWith("\\\\"))
{
return filePath;
}
var firstChar = filePath[0];
if (firstChar == '/')
{
// For this we don't really know.
return filePath;
}
if (firstChar == '\\') //relative path
{
filePath = filePath.Substring(1);
}
try
{
string path = System.IO.Path.Combine(folderPath, filePath);
path = System.IO.Path.GetFullPath(path);
return path;
}
catch (ArgumentException)
{
return filePath;
}
catch (PathTooLongException)
{
return filePath;
}
catch (NotSupportedException)
{
return filePath;
}
}
///
/// Creates the shortcut.
///
/// The shortcut path.
/// The target.
///
/// shortcutPath
/// or
/// target
///
public void CreateShortcut(string shortcutPath, string target)
{
if (string.IsNullOrEmpty(shortcutPath))
{
throw new ArgumentNullException(nameof(shortcutPath));
}
if (string.IsNullOrEmpty(target))
{
throw new ArgumentNullException(nameof(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();
}
}
///
/// Returns a object for the specified file or directory path.
///
/// A path to a file or directory.
/// A object.
/// If the specified path points to a directory, the returned object's
/// property will be set to true and all other properties will reflect the properties of the directory.
public FileSystemMetadata GetFileSystemInfo(string 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));
}
}
///
/// Returns a object for the specified file path.
///
/// A path to a file.
/// A object.
/// If the specified path points to a directory, the returned object's
/// property and the property will both be set to false.
/// For automatic handling of files and directories, use .
public FileSystemMetadata GetFileInfo(string path)
{
var fileInfo = new FileInfo(path);
return GetFileSystemMetadata(fileInfo);
}
///
/// Returns a object for the specified directory path.
///
/// A path to a directory.
/// A object.
/// If the specified path points to a file, the returned object's
/// property will be set to true and the property will be set to false.
/// For automatic handling of files and directories, use .
public FileSystemMetadata GetDirectoryInfo(string 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)
{
result.IsDirectory = info is DirectoryInfo || (info.Attributes & FileAttributes.Directory) == FileAttributes.Directory;
//if (!result.IsDirectory)
//{
// result.IsHidden = (info.Attributes & FileAttributes.Hidden) == FileAttributes.Hidden;
//}
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;
}
private static ExtendedFileSystemInfo GetExtendedFileSystemInfo(string path)
{
var result = new ExtendedFileSystemInfo();
var info = new FileInfo(path);
if (info.Exists)
{
result.Exists = true;
var attributes = info.Attributes;
result.IsHidden = (attributes & FileAttributes.Hidden) == FileAttributes.Hidden;
result.IsReadOnly = (attributes & FileAttributes.ReadOnly) == FileAttributes.ReadOnly;
}
return result;
}
///
/// The space char
///
private const char SpaceChar = ' ';
///
/// Takes a filename and removes invalid characters
///
/// The filename.
/// System.String.
/// filename
public string GetValidFilename(string filename)
{
var builder = new StringBuilder(filename);
foreach (var c in _invalidFileNameChars)
{
builder = builder.Replace(c, SpaceChar);
}
return builder.ToString();
}
///
/// Gets the creation time UTC.
///
/// The info.
/// DateTime.
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.LogError(ex, "Error determining CreationTimeUtc for {FullName}", info.FullName);
return DateTime.MinValue;
}
}
///
/// Gets the creation time UTC.
///
/// The path.
/// DateTime.
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;
}
///
/// Gets the creation time UTC.
///
/// The info.
/// DateTime.
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.LogError(ex, "Error determining LastAccessTimeUtc for {FullName}", info.FullName);
return DateTime.MinValue;
}
}
///
/// Gets the last write time UTC.
///
/// The path.
/// DateTime.
public DateTime GetLastWriteTimeUtc(string path)
{
return GetLastWriteTimeUtc(GetFileSystemInfo(path));
}
///
/// Gets the file stream.
///
/// The path.
/// The mode.
/// The access.
/// The share.
/// if set to true [is asynchronous].
/// FileStream.
public Stream GetFileStream(string path, FileOpenMode mode, FileAccessMode access, FileShareMode share, bool isAsync = false)
{
if (_supportsAsyncFileStreams && isAsync)
{
return GetFileStream(path, mode, access, share, FileOpenOptions.Asynchronous);
}
return GetFileStream(path, mode, access, share, FileOpenOptions.None);
}
public Stream GetFileStream(string path, FileOpenMode mode, FileAccessMode access, FileShareMode share, FileOpenOptions fileOpenOptions)
{
var defaultBufferSize = 4096;
return new FileStream(path, GetFileMode(mode), GetFileAccess(access), GetFileShare(share), defaultBufferSize, GetFileOptions(fileOpenOptions));
}
private static FileOptions GetFileOptions(FileOpenOptions mode)
{
var val = (int)mode;
return (FileOptions)val;
}
private static 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 static FileAccess GetFileAccess(FileAccessMode mode)
{
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");
}
}
private static FileShare GetFileShare(FileShareMode mode)
{
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");
}
}
public void SetHidden(string path, bool isHidden)
{
if (_environmentInfo.OperatingSystem != MediaBrowser.Model.System.OperatingSystem.Windows)
{
return;
}
var info = GetExtendedFileSystemInfo(path);
if (info.Exists && info.IsHidden != isHidden)
{
if (isHidden)
{
File.SetAttributes(path, File.GetAttributes(path) | FileAttributes.Hidden);
}
else
{
var attributes = File.GetAttributes(path);
attributes = RemoveAttribute(attributes, FileAttributes.Hidden);
File.SetAttributes(path, attributes);
}
}
}
public void SetReadOnly(string path, bool isReadOnly)
{
if (_environmentInfo.OperatingSystem != MediaBrowser.Model.System.OperatingSystem.Windows)
{
return;
}
var info = GetExtendedFileSystemInfo(path);
if (info.Exists && info.IsReadOnly != isReadOnly)
{
if (isReadOnly)
{
File.SetAttributes(path, File.GetAttributes(path) | FileAttributes.ReadOnly);
}
else
{
var attributes = File.GetAttributes(path);
attributes = RemoveAttribute(attributes, FileAttributes.ReadOnly);
File.SetAttributes(path, attributes);
}
}
}
public void SetAttributes(string path, bool isHidden, bool isReadOnly)
{
if (_environmentInfo.OperatingSystem != MediaBrowser.Model.System.OperatingSystem.Windows)
{
return;
}
var info = GetExtendedFileSystemInfo(path);
if (!info.Exists)
{
return;
}
if (info.IsReadOnly == isReadOnly && info.IsHidden == isHidden)
{
return;
}
var attributes = File.GetAttributes(path);
if (isReadOnly)
{
attributes = attributes | FileAttributes.ReadOnly;
}
else
{
attributes = RemoveAttribute(attributes, FileAttributes.ReadOnly);
}
if (isHidden)
{
attributes = attributes | FileAttributes.Hidden;
}
else
{
attributes = RemoveAttribute(attributes, FileAttributes.Hidden);
}
File.SetAttributes(path, attributes);
}
private static FileAttributes RemoveAttribute(FileAttributes attributes, FileAttributes attributesToRemove)
{
return attributes & ~attributesToRemove;
}
///
/// Swaps the files.
///
/// The file1.
/// The file2.
public void SwapFiles(string file1, string file2)
{
if (string.IsNullOrEmpty(file1))
{
throw new ArgumentNullException(nameof(file1));
}
if (string.IsNullOrEmpty(file2))
{
throw new ArgumentNullException(nameof(file2));
}
var temp1 = Path.Combine(_tempPath, Guid.NewGuid().ToString("N"));
// Copying over will fail against hidden files
SetHidden(file1, false);
SetHidden(file2, false);
Directory.CreateDirectory(_tempPath);
CopyFile(file1, temp1, true);
CopyFile(file2, file1, true);
CopyFile(temp1, file2, true);
}
private static char GetDirectorySeparatorChar(string path)
{
return Path.DirectorySeparatorChar;
}
public bool ContainsSubPath(string parentPath, string path)
{
if (string.IsNullOrEmpty(parentPath))
{
throw new ArgumentNullException(nameof(parentPath));
}
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(nameof(path));
}
var separatorChar = GetDirectorySeparatorChar(parentPath);
return path.IndexOf(parentPath.TrimEnd(separatorChar) + separatorChar, StringComparison.OrdinalIgnoreCase) != -1;
}
public bool IsRootPath(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(nameof(path));
}
var parent = GetDirectoryName(path);
if (!string.IsNullOrEmpty(parent))
{
return false;
}
return true;
}
public string GetDirectoryName(string path)
{
return Path.GetDirectoryName(path);
}
public string NormalizePath(string path)
{
if (string.IsNullOrEmpty(path))
{
throw new ArgumentNullException(nameof(path));
}
if (path.EndsWith(":\\", StringComparison.OrdinalIgnoreCase))
{
return path;
}
return path.TrimEnd(GetDirectorySeparatorChar(path));
}
public bool AreEqual(string path1, string path2)
{
if (path1 == null && path2 == null)
{
return true;
}
if (path1 == null || path2 == null)
{
return false;
}
return string.Equals(NormalizePath(path1), NormalizePath(path2), StringComparison.OrdinalIgnoreCase);
}
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)
{
// 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)
{
SetAttributes(path, false, false);
File.Delete(path);
}
public void DeleteDirectory(string path, bool recursive)
{
Directory.Delete(path, recursive);
}
public void CreateDirectory(string path)
{
Directory.CreateDirectory(path);
}
public List 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 static string GetName(DriveInfo drive)
{
return drive.Name;
}
public IEnumerable GetDirectories(string path, bool recursive = false)
{
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
return ToMetadata(new DirectoryInfo(path).EnumerateDirectories("*", searchOption));
}
public IEnumerable GetFiles(string path, bool recursive = false)
{
return GetFiles(path, null, false, recursive);
}
public IEnumerable GetFiles(string path, string[] extensions, bool enableCaseSensitiveExtensions, bool recursive = false)
{
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
// On linux and osx the search pattern is case sensitive
// If we're OK with case-sensitivity, and we're only filtering for one extension, then use the native method
if ((enableCaseSensitiveExtensions || _isEnvironmentCaseInsensitive) && extensions != null && extensions.Length == 1)
{
return ToMetadata(new DirectoryInfo(path).EnumerateFiles("*" + extensions[0], searchOption));
}
var files = new DirectoryInfo(path).EnumerateFiles("*", searchOption);
if (extensions != null && extensions.Length > 0)
{
files = files.Where(i =>
{
var ext = i.Extension;
if (ext == null)
{
return false;
}
return extensions.Contains(ext, StringComparer.OrdinalIgnoreCase);
});
}
return ToMetadata(files);
}
public IEnumerable GetFileSystemEntries(string path, bool recursive = false)
{
var directoryInfo = new DirectoryInfo(path);
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
if (EnableSeparateFileAndDirectoryQueries)
{
return ToMetadata(directoryInfo.EnumerateDirectories("*", searchOption))
.Concat(ToMetadata(directoryInfo.EnumerateFiles("*", searchOption)));
}
return ToMetadata(directoryInfo.EnumerateFileSystemInfos("*", searchOption));
}
private IEnumerable ToMetadata(IEnumerable infos)
{
return infos.Select(GetFileSystemMetadata);
}
public string[] ReadAllLines(string path)
{
return File.ReadAllLines(path);
}
public void WriteAllLines(string path, IEnumerable lines)
{
File.WriteAllLines(path, lines);
}
public Stream OpenRead(string path)
{
return File.OpenRead(path);
}
private void CopyFileUsingStreams(string source, string target, bool overwrite)
{
using (var sourceStream = OpenRead(source))
{
using (var targetStream = GetFileStream(target, FileOpenMode.Create, FileAccessMode.Write, FileShareMode.Read))
{
sourceStream.CopyTo(targetStream);
}
}
}
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 GetDirectoryPaths(string path, bool recursive = false)
{
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
return Directory.EnumerateDirectories(path, "*", searchOption);
}
public IEnumerable GetFilePaths(string path, bool recursive = false)
{
return GetFilePaths(path, null, false, recursive);
}
public IEnumerable GetFilePaths(string path, string[] extensions, bool enableCaseSensitiveExtensions, bool recursive = false)
{
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
// On linux and osx the search pattern is case sensitive
// If we're OK with case-sensitivity, and we're only filtering for one extension, then use the native method
if ((enableCaseSensitiveExtensions || _isEnvironmentCaseInsensitive) && extensions != null && extensions.Length == 1)
{
return Directory.EnumerateFiles(path, "*" + extensions[0], searchOption);
}
var files = Directory.EnumerateFiles(path, "*", searchOption);
if (extensions != null && extensions.Length > 0)
{
files = files.Where(i =>
{
var ext = Path.GetExtension(i);
if (ext == null)
{
return false;
}
return extensions.Contains(ext, StringComparer.OrdinalIgnoreCase);
});
}
return files;
}
public IEnumerable GetFileSystemEntryPaths(string path, bool recursive = false)
{
var searchOption = recursive ? SearchOption.AllDirectories : SearchOption.TopDirectoryOnly;
return Directory.EnumerateFileSystemEntries(path, "*", searchOption);
}
public virtual void SetExecutable(string path)
{
if (_environmentInfo.OperatingSystem == MediaBrowser.Model.System.OperatingSystem.OSX)
{
RunProcess("chmod", "+x \"" + path + "\"", GetDirectoryName(path));
}
}
private static void RunProcess(string path, string args, string workingDirectory)
{
using (var process = Process.Start(new ProcessStartInfo
{
Arguments = args,
FileName = path,
CreateNoWindow = true,
WorkingDirectory = workingDirectory,
WindowStyle = ProcessWindowStyle.Normal
}))
{
process.WaitForExit();
}
}
}
}