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add more methods to file system interface

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This commit is contained in:
Luke Pulverenti
2014-01-01 13:26:31 -05:00
parent 88b638fbd6
commit b9d17c9bc7
54 changed files with 737 additions and 459 deletions
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200
MediaBrowser.Common.Implementations/IO/CommonFileSystem.cs
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@@ -82,6 +82,16 @@ namespace MediaBrowser.Common.Implementations.IO
throw new ArgumentNullException("target");
}
if (string.IsNullOrEmpty(shortcutPath))
{
throw new ArgumentNullException("shortcutPath");
}
if (string.IsNullOrEmpty(target))
{
throw new ArgumentNullException("target");
}
File.WriteAllText(shortcutPath, target);
}
@@ -92,6 +102,11 @@ namespace MediaBrowser.Common.Implementations.IO
/// <returns>FileSystemInfo.</returns>
public FileSystemInfo 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))
{
@@ -172,7 +187,6 @@ namespace MediaBrowser.Common.Implementations.IO
/// Gets the creation time UTC.
/// </summary>
/// <param name="info">The info.</param>
/// <param name="logger">The logger.</param>
/// <returns>DateTime.</returns>
public DateTime GetLastWriteTimeUtc(FileSystemInfo info)
{
@@ -224,6 +238,16 @@ namespace MediaBrowser.Common.Implementations.IO
/// <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();
@@ -247,6 +271,11 @@ namespace MediaBrowser.Common.Implementations.IO
/// <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
@@ -258,127 +287,52 @@ namespace MediaBrowser.Common.Implementations.IO
}
}
}
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);
}
}
/// <summary>
/// Adapted from http://stackoverflow.com/questions/309495/windows-shortcut-lnk-parser-in-java
/// </summary>
internal class WindowsShortcut
{
public bool IsDirectory { get; private set; }
public bool IsLocal { get; private set; }
public string ResolvedPath { get; private set; }
public WindowsShortcut(string file)
{
ParseLink(File.ReadAllBytes(file), Encoding.UTF8);
}
private static bool isMagicPresent(byte[] link)
{
const int magic = 0x0000004C;
const int magic_offset = 0x00;
return link.Length >= 32 && bytesToDword(link, magic_offset) == magic;
}
/**
* Gobbles up link data by parsing it and storing info in member fields
* @param link all the bytes from the .lnk file
*/
private void ParseLink(byte[] link, Encoding encoding)
{
if (!isMagicPresent(link))
throw new IOException("Invalid shortcut; magic is missing", 0);
// get the flags byte
byte flags = link[0x14];
// get the file attributes byte
const int file_atts_offset = 0x18;
byte file_atts = link[file_atts_offset];
byte is_dir_mask = (byte)0x10;
if ((file_atts & is_dir_mask) > 0)
{
IsDirectory = true;
}
else
{
IsDirectory = false;
}
// if the shell settings are present, skip them
const int shell_offset = 0x4c;
const byte has_shell_mask = (byte)0x01;
int shell_len = 0;
if ((flags & has_shell_mask) > 0)
{
// the plus 2 accounts for the length marker itself
shell_len = bytesToWord(link, shell_offset) + 2;
}
// get to the file settings
int file_start = 0x4c + shell_len;
const int file_location_info_flag_offset_offset = 0x08;
int file_location_info_flag = link[file_start + file_location_info_flag_offset_offset];
IsLocal = (file_location_info_flag & 2) == 0;
// get the local volume and local system values
//final int localVolumeTable_offset_offset = 0x0C;
const int basename_offset_offset = 0x10;
const int networkVolumeTable_offset_offset = 0x14;
const int finalname_offset_offset = 0x18;
int finalname_offset = link[file_start + finalname_offset_offset] + file_start;
String finalname = getNullDelimitedString(link, finalname_offset, encoding);
if (IsLocal)
{
int basename_offset = link[file_start + basename_offset_offset] + file_start;
String basename = getNullDelimitedString(link, basename_offset, encoding);
ResolvedPath = basename + finalname;
}
else
{
int networkVolumeTable_offset = link[file_start + networkVolumeTable_offset_offset] + file_start;
int shareName_offset_offset = 0x08;
int shareName_offset = link[networkVolumeTable_offset + shareName_offset_offset]
+ networkVolumeTable_offset;
String shareName = getNullDelimitedString(link, shareName_offset, encoding);
ResolvedPath = shareName + "\\" + finalname;
}
}
private static string getNullDelimitedString(byte[] bytes, int off, Encoding encoding)
{
int len = 0;
// count bytes until the null character (0)
while (true)
{
if (bytes[off + len] == 0)
{
break;
}
len++;
}
return encoding.GetString(bytes, off, len);
}
/*
* convert two bytes into a short note, this is little endian because it's
* for an Intel only OS.
*/
private static int bytesToWord(byte[] bytes, int off)
{
return ((bytes[off + 1] & 0xff) << 8) | (bytes[off] & 0xff);
}
private static int bytesToDword(byte[] bytes, int off)
{
return (bytesToWord(bytes, off + 2) << 16) | bytesToWord(bytes, off);
}
}
}