159 lines
4.6 KiB
C#
159 lines
4.6 KiB
C#
//
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// FileSystemManager.cs
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//
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// Author:
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// Paul Schneider <paulschneider@free.fr>
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//
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// Copyright (c) 2015 Paul Schneider
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using System;
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using System.IO;
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using System.Web;
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using System.Text.RegularExpressions;
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using System.Text;
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using System.Web.Security;
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using System.Linq;
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using System.Collections.Generic;
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using System.Collections.Specialized;
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namespace Yavsc.Model.FileSystem
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{
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/// <summary>
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/// File system manager.
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/// It performs the FileSystem controllers logic.
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/// It will not be a true file system,
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/// It just provides simple method for a small set of
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/// files, in a small tree of sub-folders .
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/// </summary>
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public abstract class WebFileSystemManager
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{
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/// <summary>
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/// Gets or sets the size of the max file.
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/// </summary>
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/// <value>The size of the max file.</value>
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public long MaxFileSize { get; set; }
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/// <summary>
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/// Gets or sets the max user storage.
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/// </summary>
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/// <value>The max user storage.</value>
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public long MaxUserStorage { get; set; }
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string regexFileName = "^[A-Za-z0-9#^!+ _~\\-.]+$";
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/// <summary>
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/// Put the specified files in destDir, as sub dir of the current user's home dir.
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/// </summary>
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/// <param name="destDir">Destination dir, use "." to point to the user's home dir.</param>
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/// <param name="files">Files.</param>
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public void Put (string destDir, NameObjectCollectionBase files)
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{
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// sanity check on file names
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foreach (object obj in files) {
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HttpPostedFileBase file = obj as HttpPostedFileBase;
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if (!Regex.Match (file.FileName, regexFileName).Success) {
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throw new InvalidOperationException (string.Format (
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"The file name {0} dosn't match an acceptable file name ({1})",
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file.FileName, regexFileName));
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}
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}
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// do the job
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ValidateSubDir (destDir,true);
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DirectoryInfo di = new DirectoryInfo (
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Path.Combine (Prefix, destDir));
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if (!di.Exists)
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di.Create ();
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foreach (object obj in files) {
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HttpPostedFileBase file = obj as HttpPostedFileBase;
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// TODO Limit with hfc[h].ContentLength
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string filename = Path.Combine (di.FullName, file.FileName);
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file.SaveAs (filename);
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}
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}
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private string prefix = null;
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/// <summary>
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/// Gets the users dir.
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/// </summary>
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/// <value>The users dir.</value>
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public string Prefix {
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get {
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return prefix;
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}
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set {
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prefix = value;
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}
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}
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/// <summary>
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/// Checks the sub dir name against model specifications,
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/// concerning the allowed character class.
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/// </summary>
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/// <param name="subdir">Subdir.</param>
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/// <param name="throwex">throw ex.</param>
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public bool ValidateSubDir (string subdir, bool throwex = false)
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{
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foreach (string dirname in subdir.Split(Path.DirectorySeparatorChar)) {
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if (!Regex.Match (dirname, regexFileName).Success) {
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if (throwex)
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throw new InvalidDirNameException (dirname);
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else
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return false;
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}
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foreach (char x in dirname)
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if (subdir.Contains (x)) {
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if (throwex)
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throw new InvalidDirNameException (subdir);
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else
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return false;
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}
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}
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return true;
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}
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/// <summary>
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/// Gets the files owned by the current logged user.
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/// The web user must be authenticated,
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/// The given username must be registered.
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/// </summary>
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/// <returns>The files.</returns>
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/// <param name="subdir">Subdir.</param>
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public virtual IEnumerable<FileInfo> GetFiles (string subdir)
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{
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string path = Prefix;
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if (subdir != null) {
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ValidateSubDir (subdir,true); // checks for specification validity
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path = Path.Combine (Prefix, subdir);
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}
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DirectoryInfo di = new DirectoryInfo (path);
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return (di.GetFiles ());
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}
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/// <summary>
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/// Files the info.
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/// </summary>
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/// <returns>The info.</returns>
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/// <param name="filePath">file Path.</param>
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public FileInfo FileInfo(string filePath)
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{
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ValidateSubDir (filePath,true);
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return new FileInfo(Path.Combine (Prefix, filePath));
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}
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}
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}
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