496 lines
20 KiB
C#
496 lines
20 KiB
C#
// Copyright (C) 2025, The Duplicati Team
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// https://duplicati.com, hello@duplicati.com
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using Duplicati.Library.Backend.GoogleServices;
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using Duplicati.Library.Common.IO;
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using Duplicati.Library.Interface;
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using Duplicati.Library.Utility;
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using Newtonsoft.Json;
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Linq;
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using System.Net;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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namespace Duplicati.Library.Backend.GoogleDrive
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{
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// ReSharper disable once UnusedMember.Global
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// This class is instantiated dynamically in the BackendLoader.
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public class GoogleDrive : IBackend, IStreamingBackend, IQuotaEnabledBackend, IRenameEnabledBackend, ITimeoutExemptBackend
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{
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private const string AUTHID_OPTION = "authid";
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private const string TEAMDRIVE_ID = "googledrive-teamdrive-id";
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private const string FOLDER_MIMETYPE = "application/vnd.google-apps.folder";
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private readonly string m_path;
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private readonly string m_teamDriveID;
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private readonly OAuthHelper m_oauth;
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private readonly Dictionary<string, GoogleDriveFolderItem[]> m_filecache;
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private string m_currentFolderId;
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public GoogleDrive()
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{
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}
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public GoogleDrive(string url, Dictionary<string, string> options)
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{
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var uri = new Utility.Uri(url);
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m_path = Util.AppendDirSeparator(uri.HostAndPath, "/");
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string authid = null;
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if (options.ContainsKey(AUTHID_OPTION))
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authid = options[AUTHID_OPTION];
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if (options.ContainsKey(TEAMDRIVE_ID))
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m_teamDriveID = options[TEAMDRIVE_ID];
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m_oauth = new OAuthHelper(authid, this.ProtocolKey) { AutoAuthHeader = true };
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m_filecache = new Dictionary<string, GoogleDriveFolderItem[]>();
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}
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private async Task<string> GetFolderIdAsync(string path, bool autocreate, CancellationToken cancelToken)
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{
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var curparent = m_teamDriveID ?? (await GetAboutInfoAsync(cancelToken).ConfigureAwait(false)).rootFolderId;
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var curdisplay = new StringBuilder("/");
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foreach (var p in path.Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries))
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{
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var res = await ListFolder(curparent, true, p, cancelToken).ToArrayAsync(cancelToken).ConfigureAwait(false);
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if (res.Length == 0)
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{
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if (!autocreate)
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throw new FolderMissingException();
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curparent = (await CreateFolderAsync(p, curparent, cancelToken)).id;
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}
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else if (res.Length > 1)
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{
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throw new UserInformationException(Strings.GoogleDrive.MultipleEntries(p, curdisplay.ToString()), "GoogleDriveMultipleEntries");
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}
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else
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{
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curparent = res[0].id;
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}
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curdisplay.Append(p).Append("/");
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}
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return curparent;
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}
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private async Task<string> GetCurrentFolderIdAsync(CancellationToken cancelToken)
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{
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if (string.IsNullOrEmpty(m_currentFolderId))
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m_currentFolderId = await GetFolderIdAsync(m_path, false, cancelToken).ConfigureAwait(false);
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return m_currentFolderId;
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}
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private async Task<GoogleDriveFolderItem[]> GetFileEntriesAsync(string remotename, bool throwMissingException, CancellationToken cancelToken)
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{
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GoogleDriveFolderItem[] entries;
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m_filecache.TryGetValue(remotename, out entries);
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if (entries != null)
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return entries;
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var currentFolderId = await GetCurrentFolderIdAsync(cancelToken).ConfigureAwait(false);
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entries = await ListFolder(currentFolderId, false, remotename, cancelToken).ToArrayAsync(cancelToken).ConfigureAwait(false);
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if (entries == null || entries.Length == 0)
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{
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if (throwMissingException)
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throw new FileMissingException();
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else
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return null;
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}
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return m_filecache[remotename] = entries;
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}
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private static string EscapeTitleEntries(string title)
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{
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return title.Replace("'", "\\'");
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}
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#region IStreamingBackend implementation
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public async Task PutAsync(string remotename, System.IO.Stream stream, CancellationToken cancelToken)
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{
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try
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{
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// Figure out if we update or create the file
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if (m_filecache.Count == 0)
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await foreach (var file in ListAsync(cancelToken).ConfigureAwait(false)) { /* Enumerate the full listing */ }
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GoogleDriveFolderItem[] files;
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m_filecache.TryGetValue(remotename, out files);
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string fileId = null;
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if (files != null)
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{
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if (files.Length == 1)
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fileId = files[0].id;
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else
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await DeleteAsync(remotename, cancelToken);
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}
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var isUpdate = !string.IsNullOrWhiteSpace(fileId);
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var url = WebApi.GoogleDrive.PutUrl(fileId, m_teamDriveID != null);
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var currentFolderId = await GetCurrentFolderIdAsync(cancelToken).ConfigureAwait(false);
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var item = new GoogleDriveFolderItem
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{
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title = remotename,
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description = remotename,
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mimeType = "application/octet-stream",
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labels = new GoogleDriveFolderItemLabels { hidden = true },
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parents = [new GoogleDriveParentReference { id = currentFolderId }],
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teamDriveId = m_teamDriveID
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};
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var res = await GoogleCommon.ChunkedUploadWithResumeAsync<GoogleDriveFolderItem, GoogleDriveFolderItem>(m_oauth, item, url, stream, cancelToken, isUpdate ? "PUT" : "POST").ConfigureAwait(false);
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m_filecache[remotename] = [res];
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}
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catch
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{
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m_filecache.Clear();
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throw;
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}
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}
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public async Task GetAsync(string remotename, System.IO.Stream stream, CancellationToken cancelToken)
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{
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// Prevent repeated download url lookups
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if (m_filecache.Count == 0)
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await foreach (var file in ListAsync(cancelToken).ConfigureAwait(false)) { /* Enumerate the full listing */ }
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var fileId = (await GetFileEntriesAsync(remotename, true, cancelToken).ConfigureAwait(false)).OrderByDescending(x => x.createdDate).First().id;
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var req = m_oauth.CreateRequest(WebApi.GoogleDrive.GetUrl(fileId));
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var areq = new AsyncHttpRequest(req);
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using (var resp = (HttpWebResponse)areq.GetResponse())
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using (var rs = areq.GetResponseStream())
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await Duplicati.Library.Utility.Utility.CopyStreamAsync(rs, stream, cancelToken);
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}
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#endregion
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#region IBackend implementation
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/// <inheritdoc />
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public async IAsyncEnumerable<IFileEntry> ListAsync([EnumeratorCancellation] CancellationToken cancelToken)
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{
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bool success = false;
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try
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{
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m_filecache.Clear();
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// For now, this class assumes that List() fully populates the file cache
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var currentFolderId = await GetCurrentFolderIdAsync(cancelToken).ConfigureAwait(false);
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await foreach (var n in ListFolder(currentFolderId, null, null, cancelToken).ConfigureAwait(false))
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{
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FileEntry fe = null;
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if (n.fileSize == null)
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fe = new FileEntry(n.title);
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else if (n.modifiedDate == null)
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fe = new FileEntry(n.title, n.fileSize.Value);
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else
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fe = new FileEntry(n.title, n.fileSize.Value, n.modifiedDate.Value, n.modifiedDate.Value);
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if (fe != null)
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{
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fe.IsFolder = FOLDER_MIMETYPE.Equals(n.mimeType, StringComparison.OrdinalIgnoreCase);
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if (!fe.IsFolder)
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{
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GoogleDriveFolderItem[] lst;
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if (!m_filecache.TryGetValue(fe.Name, out lst))
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{
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m_filecache[fe.Name] = new GoogleDriveFolderItem[] { n };
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}
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else
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{
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Array.Resize(ref lst, lst.Length + 1);
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lst[lst.Length - 1] = n;
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}
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}
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yield return fe;
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}
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}
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success = true;
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}
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finally
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{
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// If the enumeration either failed or didn't complete, clear the file cache.
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// This way, other operations which require a fully populated file cache will see an empty one and can populate it themselves.
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if (!success)
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{
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m_filecache.Clear();
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}
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}
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}
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public async Task PutAsync(string remotename, string filename, CancellationToken cancelToken)
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{
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using (var fs = System.IO.File.OpenRead(filename))
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await PutAsync(remotename, fs, cancelToken).ConfigureAwait(false);
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}
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public async Task GetAsync(string remotename, string filename, CancellationToken cancelToken)
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{
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using (var fs = System.IO.File.Create(filename))
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await GetAsync(remotename, fs, cancelToken);
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}
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public async Task DeleteAsync(string remotename, CancellationToken cancelToken)
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{
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try
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{
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foreach (var fileid in from n in await GetFileEntriesAsync(remotename, true, cancelToken).ConfigureAwait(false) select n.id)
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{
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var url = WebApi.GoogleDrive.DeleteUrl(Library.Utility.Uri.UrlPathEncode(fileid), m_teamDriveID);
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await m_oauth.GetJSONDataAsync<object>(url, cancelToken, x =>
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{
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x.Method = "DELETE";
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});
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}
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m_filecache.Remove(remotename);
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}
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catch
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{
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m_filecache.Clear();
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throw;
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}
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}
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public Task TestAsync(CancellationToken cancelToken)
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=> this.TestListAsync(cancelToken);
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public async Task CreateFolderAsync(CancellationToken cancelToken)
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{
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m_filecache.Clear();
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m_currentFolderId = await GetFolderIdAsync(m_path, true, cancelToken).ConfigureAwait(false);
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}
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public string DisplayName
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{
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get
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{
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return Strings.GoogleDrive.DisplayName;
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}
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}
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public string ProtocolKey
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{
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get
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{
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return "googledrive";
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}
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}
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public System.Collections.Generic.IList<ICommandLineArgument> SupportedCommands => new List<ICommandLineArgument>(new ICommandLineArgument[] {
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new CommandLineArgument(AUTHID_OPTION,
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CommandLineArgument.ArgumentType.Password,
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Strings.GoogleDrive.AuthidShort,
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Strings.GoogleDrive.AuthidLong(OAuthHelper.OAUTH_LOGIN_URL("googledrive"))),
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new CommandLineArgument(TEAMDRIVE_ID,
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CommandLineArgument.ArgumentType.String,
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Strings.GoogleDrive.TeamDriveIdShort,
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Strings.GoogleDrive.TeamDriveIdLong),
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});
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public string Description
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{
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get
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{
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return Strings.GoogleDrive.Description;
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}
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}
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#endregion
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#region IQuotaEnabledBackend implementation
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public async Task<IQuotaInfo> GetQuotaInfoAsync(CancellationToken cancelToken)
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{
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try
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{
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var about = await this.GetAboutInfoAsync(cancelToken).ConfigureAwait(false);
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return new QuotaInfo(about.quotaBytesTotal ?? -1, about.quotaBytesTotal - about.quotaBytesUsed ?? -1);
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}
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catch
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{
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return null;
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}
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}
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public Task<string[]> GetDNSNamesAsync(CancellationToken cancelToken) => Task.FromResult(WebApi.GoogleDrive.Hosts());
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#endregion
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#region IRenameEnabledBackend implementation
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public async Task RenameAsync(string oldname, string newname, CancellationToken cancellationToken)
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{
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try
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{
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var files = await GetFileEntriesAsync(oldname, true, cancellationToken).ConfigureAwait(false);
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if (files.Length > 1)
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throw new UserInformationException(string.Format(Strings.GoogleDrive.MultipleEntries(oldname, m_path)),
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"GoogleDriveMultipleEntries");
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using var stream = new MemoryStream();
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await GetAsync(oldname, stream, cancellationToken).ConfigureAwait(false);
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await PutAsync(newname, stream, cancellationToken).ConfigureAwait(false);
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await DeleteAsync(oldname, cancellationToken).ConfigureAwait(false);
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m_filecache.Remove(oldname);
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}
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catch
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{
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m_filecache.Clear();
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throw;
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}
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}
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#endregion
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#region IDisposable implementation
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public void Dispose()
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{
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}
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#endregion
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private class GoogleDriveParentReference
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{
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public string id { get; set; }
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}
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private class GoogleDriveListResponse
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{
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public string nextPageToken { get; set; }
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public GoogleDriveFolderItem[] items { get; set; }
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}
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private class GoogleDriveFolderItemLabels
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{
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public bool hidden { get; set; }
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}
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private class GoogleDriveFolderItem
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{
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public string id { get; set; }
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public string title { get; set; }
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public string description { get; set; }
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public string mimeType { get; set; }
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public GoogleDriveFolderItemLabels labels { get; set; }
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public DateTime? createdDate { get; set; }
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public DateTime? modifiedDate { get; set; }
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public long? fileSize { get; set; }
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public string teamDriveId { get; set; }
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public GoogleDriveParentReference[] parents { get; set; }
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}
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private class GoogleDriveAboutResponse
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{
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public long? quotaBytesTotal { get; set; }
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public long? quotaBytesUsed { get; set; }
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public string rootFolderId { get; set; }
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}
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private async IAsyncEnumerable<GoogleDriveFolderItem> ListFolder(string parentfolder, bool? onlyFolders, string name, [EnumeratorCancellation] CancellationToken cancelToken)
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{
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var fileQuery = new string[] {
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string.IsNullOrEmpty(name) ? null : string.Format("title = '{0}'", EscapeTitleEntries(name)),
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onlyFolders == null ? null : string.Format("mimeType {0}= '{1}'", onlyFolders.Value ? "" : "!", FOLDER_MIMETYPE),
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string.Format("'{0}' in parents", EscapeTitleEntries(parentfolder)),
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"trashed=false"
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};
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var encodedFileQuery = Library.Utility.Uri.UrlEncode(string.Join(" and ", fileQuery.Where(x => x != null)));
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var url = WebApi.GoogleDrive.ListUrl(encodedFileQuery, m_teamDriveID);
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while (true)
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{
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var res = await m_oauth.GetJSONDataAsync<GoogleDriveListResponse>(url, cancelToken).ConfigureAwait(false);
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foreach (var n in res.items)
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yield return n;
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var token = res.nextPageToken;
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if (string.IsNullOrWhiteSpace(token))
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break;
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url = WebApi.GoogleDrive.ListUrl(encodedFileQuery, m_teamDriveID, token);
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}
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}
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private Task<GoogleDriveAboutResponse> GetAboutInfoAsync(CancellationToken cancelToken)
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{
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return m_oauth.GetJSONDataAsync<GoogleDriveAboutResponse>(WebApi.GoogleDrive.AboutInfoUrl(), cancelToken);
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}
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private Task<GoogleDriveFolderItem> CreateFolderAsync(string name, string parent, CancellationToken cancelToken)
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{
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var folder = new GoogleDriveFolderItem()
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{
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title = name,
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description = name,
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mimeType = FOLDER_MIMETYPE,
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labels = new GoogleDriveFolderItemLabels { hidden = true },
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parents = new GoogleDriveParentReference[] { new GoogleDriveParentReference { id = parent } }
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};
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var data = System.Text.Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(folder));
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return m_oauth.GetJSONDataAsync<GoogleDriveFolderItem>(
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WebApi.GoogleDrive.CreateFolderUrl(m_teamDriveID),
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cancelToken,
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x =>
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{
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x.Method = "POST";
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x.ContentType = "application/json; charset=UTF-8";
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x.ContentLength = data.Length;
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}, async (req, ct) =>
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{
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using (var rs = req.GetRequestStream())
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await rs.WriteAsync(data, 0, data.Length, ct).ConfigureAwait(false);
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});
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}
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}
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}
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