62 lines
2.0 KiB
C#
62 lines
2.0 KiB
C#
using System.Linq;
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using System.Security.Claims;
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using System.Text;
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using Yavsc.ViewModels.UserFiles;
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namespace Yavsc.Abstract.FileSystem
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{
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public static class AbstractFileSystemHelpers
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{
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public static string UserBillsDirName { set; get; }
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public static string UserFilesDirName { set; get; }
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public static bool IsValidYavscPath(this string path)
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{
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if (string.IsNullOrEmpty(path)) return true;
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foreach (var name in path.Split('/'))
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{
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if (!IsValidDirectoryName(name) || name.Equals("..") || name.Equals("."))
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return false;
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}
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if (path[path.Length-1]==FileSystemConstants.RemoteDirectorySeparator) return false;
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return true;
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}
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public static bool IsValidDirectoryName(this string name)
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{
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return !name.Any(c => !FileSystemConstants.ValidFileNameChars.Contains(c));
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}
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// Ensure this path is canonical,
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// No "dirto/./this", neither "dirt/to/that/"
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// no .. and each char must be listed as valid in constants
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public static string FilterFileName(string fileName)
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{
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if (fileName==null) return null;
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StringBuilder sb = new StringBuilder();
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foreach (var c in fileName)
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{
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if (FileSystemConstants.ValidFileNameChars.Contains(c))
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sb.Append(c);
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else sb.Append('_');
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}
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return sb.ToString();
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}
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public static UserDirectoryInfo GetUserFiles(this ClaimsPrincipal user, string subdir)
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{
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UserDirectoryInfo di = new UserDirectoryInfo(UserFilesDirName, user.Identity.Name, subdir);
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return di;
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}
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}
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public static class FileSystemConstants
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{
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public const char RemoteDirectorySeparator = '/';
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public static char[] ValidFileNameChars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-=_~.".ToCharArray();
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}
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} |