367 lines
11 KiB
C#
367 lines
11 KiB
C#
using MediaBrowser.Common.Extensions;
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using MediaBrowser.Common.IO;
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using MediaBrowser.Model.Logging;
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using System;
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using System.IO;
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using System.Text;
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namespace MediaBrowser.Common.Implementations.IO
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{
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/// <summary>
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/// Class CommonFileSystem
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/// </summary>
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public class CommonFileSystem : IFileSystem
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{
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protected ILogger Logger;
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private readonly bool _supportsAsyncFileStreams;
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public CommonFileSystem(ILogger logger, bool supportsAsyncFileStreams)
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{
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Logger = logger;
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_supportsAsyncFileStreams = supportsAsyncFileStreams;
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}
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/// <summary>
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/// Determines whether the specified filename is shortcut.
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/// </summary>
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/// <param name="filename">The filename.</param>
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/// <returns><c>true</c> if the specified filename is shortcut; otherwise, <c>false</c>.</returns>
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/// <exception cref="System.ArgumentNullException">filename</exception>
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public virtual bool IsShortcut(string filename)
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{
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if (string.IsNullOrEmpty(filename))
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{
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throw new ArgumentNullException("filename");
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}
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var extension = Path.GetExtension(filename);
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return string.Equals(extension, ".mblink", StringComparison.OrdinalIgnoreCase);
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}
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/// <summary>
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/// Resolves the shortcut.
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/// </summary>
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/// <param name="filename">The filename.</param>
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/// <returns>System.String.</returns>
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/// <exception cref="System.ArgumentNullException">filename</exception>
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public virtual string ResolveShortcut(string filename)
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{
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if (string.IsNullOrEmpty(filename))
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{
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throw new ArgumentNullException("filename");
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}
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if (string.Equals(Path.GetExtension(filename), ".mblink", StringComparison.OrdinalIgnoreCase))
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{
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return File.ReadAllText(filename);
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}
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return null;
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}
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/// <summary>
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/// Creates the shortcut.
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/// </summary>
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/// <param name="shortcutPath">The shortcut path.</param>
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/// <param name="target">The target.</param>
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/// <exception cref="System.ArgumentNullException">
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/// shortcutPath
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/// or
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/// target
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/// </exception>
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public void CreateShortcut(string shortcutPath, string target)
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{
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if (string.IsNullOrEmpty(shortcutPath))
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{
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throw new ArgumentNullException("shortcutPath");
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}
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if (string.IsNullOrEmpty(target))
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{
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throw new ArgumentNullException("target");
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}
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File.WriteAllText(shortcutPath, target);
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}
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/// <summary>
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/// Gets the file system info.
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/// </summary>
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/// <param name="path">The path.</param>
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/// <returns>FileSystemInfo.</returns>
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public FileSystemInfo GetFileSystemInfo(string path)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentNullException("path");
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}
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// Take a guess to try and avoid two file system hits, but we'll double-check by calling Exists
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if (Path.HasExtension(path))
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{
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var fileInfo = new FileInfo(path);
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if (fileInfo.Exists)
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{
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return fileInfo;
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}
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return new DirectoryInfo(path);
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}
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else
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{
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var fileInfo = new DirectoryInfo(path);
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if (fileInfo.Exists)
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{
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return fileInfo;
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}
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return new FileInfo(path);
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}
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}
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/// <summary>
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/// The space char
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/// </summary>
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private const char SpaceChar = ' ';
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/// <summary>
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/// The invalid file name chars
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/// </summary>
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#if __MonoCS__
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//GetInvalidFileNameChars is less restrictive in Linux/Mac than Windows, this mimic Windows behavior for mono under Linux/Mac.
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private static readonly char[] InvalidFileNameChars = new char [41] { '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
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'\x08', '\x09', '\x0A', '\x0B', '\x0C', '\x0D', '\x0E', '\x0F', '\x10', '\x11', '\x12',
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'\x13', '\x14', '\x15', '\x16', '\x17', '\x18', '\x19', '\x1A', '\x1B', '\x1C', '\x1D',
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'\x1E', '\x1F', '\x22', '\x3C', '\x3E', '\x7C', ':', '*', '?', '\\', '/' };
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#else
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private static readonly char[] InvalidFileNameChars = Path.GetInvalidFileNameChars();
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#endif
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/// <summary>
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/// Takes a filename and removes invalid characters
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/// </summary>
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/// <param name="filename">The filename.</param>
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/// <returns>System.String.</returns>
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/// <exception cref="System.ArgumentNullException">filename</exception>
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public string GetValidFilename(string filename)
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{
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if (string.IsNullOrEmpty(filename))
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{
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throw new ArgumentNullException("filename");
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}
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var builder = new StringBuilder(filename);
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foreach (var c in InvalidFileNameChars)
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{
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builder = builder.Replace(c, SpaceChar);
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}
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return builder.ToString();
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}
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/// <summary>
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/// Gets the creation time UTC.
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/// </summary>
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/// <param name="info">The info.</param>
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/// <returns>DateTime.</returns>
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public DateTime GetCreationTimeUtc(FileSystemInfo info)
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{
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// This could throw an error on some file systems that have dates out of range
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try
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{
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return info.CreationTimeUtc;
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}
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catch (Exception ex)
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{
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Logger.ErrorException("Error determining CreationTimeUtc for {0}", ex, info.FullName);
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return DateTime.MinValue;
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}
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}
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/// <summary>
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/// Gets the creation time UTC.
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/// </summary>
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/// <param name="info">The info.</param>
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/// <returns>DateTime.</returns>
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public DateTime GetLastWriteTimeUtc(FileSystemInfo info)
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{
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// This could throw an error on some file systems that have dates out of range
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try
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{
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return info.LastWriteTimeUtc;
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}
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catch (Exception ex)
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{
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Logger.ErrorException("Error determining LastAccessTimeUtc for {0}", ex, info.FullName);
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return DateTime.MinValue;
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}
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}
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/// <summary>
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/// Gets the last write time UTC.
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/// </summary>
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/// <param name="path">The path.</param>
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/// <returns>DateTime.</returns>
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public DateTime GetLastWriteTimeUtc(string path)
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{
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return GetLastWriteTimeUtc(GetFileSystemInfo(path));
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}
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/// <summary>
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/// Gets the file stream.
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/// </summary>
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/// <param name="path">The path.</param>
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/// <param name="mode">The mode.</param>
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/// <param name="access">The access.</param>
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/// <param name="share">The share.</param>
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/// <param name="isAsync">if set to <c>true</c> [is asynchronous].</param>
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/// <returns>FileStream.</returns>
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public FileStream GetFileStream(string path, FileMode mode, FileAccess access, FileShare share, bool isAsync = false)
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{
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if (_supportsAsyncFileStreams && isAsync)
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{
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return new FileStream(path, mode, access, share, 4096, true);
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}
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return new FileStream(path, mode, access, share);
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}
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/// <summary>
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/// Swaps the files.
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/// </summary>
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/// <param name="file1">The file1.</param>
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/// <param name="file2">The file2.</param>
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public void SwapFiles(string file1, string file2)
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{
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if (string.IsNullOrEmpty(file1))
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{
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throw new ArgumentNullException("file1");
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}
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if (string.IsNullOrEmpty(file2))
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{
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throw new ArgumentNullException("file2");
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}
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var temp1 = Path.GetTempFileName();
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var temp2 = Path.GetTempFileName();
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// Copying over will fail against hidden files
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RemoveHiddenAttribute(file1);
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RemoveHiddenAttribute(file2);
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File.Copy(file1, temp1, true);
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File.Copy(file2, temp2, true);
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File.Copy(temp1, file2, true);
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File.Copy(temp2, file1, true);
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File.Delete(temp1);
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File.Delete(temp2);
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}
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/// <summary>
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/// Removes the hidden attribute.
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/// </summary>
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/// <param name="path">The path.</param>
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private void RemoveHiddenAttribute(string path)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentNullException("path");
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}
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var currentFile = new FileInfo(path);
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// This will fail if the file is hidden
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if (currentFile.Exists)
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{
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if ((currentFile.Attributes & FileAttributes.Hidden) == FileAttributes.Hidden)
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{
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currentFile.Attributes &= ~FileAttributes.Hidden;
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}
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}
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}
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public bool ContainsSubPath(string parentPath, string path)
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{
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if (string.IsNullOrEmpty(parentPath))
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{
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throw new ArgumentNullException("parentPath");
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}
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentNullException("path");
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}
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return path.IndexOf(parentPath.TrimEnd(Path.DirectorySeparatorChar) + Path.DirectorySeparatorChar, StringComparison.OrdinalIgnoreCase) != -1;
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}
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public bool IsRootPath(string path)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentNullException("path");
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}
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var parent = Path.GetDirectoryName(path);
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if (!string.IsNullOrEmpty(parent))
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{
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return false;
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}
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return true;
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}
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public string NormalizePath(string path)
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{
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if (string.IsNullOrEmpty(path))
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{
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throw new ArgumentNullException("path");
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}
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if (path.EndsWith(":\\", StringComparison.OrdinalIgnoreCase))
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{
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return path;
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}
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return path.TrimEnd(Path.DirectorySeparatorChar);
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}
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public string SubstitutePath(string path, string from, string to)
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{
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if (string.IsNullOrWhiteSpace(path))
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{
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throw new ArgumentNullException("path");
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}
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if (string.IsNullOrWhiteSpace(from))
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{
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throw new ArgumentNullException("from");
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}
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if (string.IsNullOrWhiteSpace(to))
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{
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throw new ArgumentNullException("to");
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}
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path = path.Replace(from, to, StringComparison.OrdinalIgnoreCase);
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if (to.IndexOf('/') != -1)
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{
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path = path.Replace('\\', '/');
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}
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else
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{
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path = path.Replace('/', '\\');
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}
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return path;
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}
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}
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}
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