| | | 1 | | using System.Globalization; |
| | | 2 | | using System.Net.Http.Headers; |
| | | 3 | | using System.Text; |
| | | 4 | | using System.Xml.Linq; |
| | | 5 | | using LifeChart.Application.Interfaces; |
| | | 6 | | using LifeChart.Application.Settings; |
| | | 7 | | |
| | | 8 | | namespace LifeChart.Infrastructure.Backup; |
| | | 9 | | |
| | | 10 | | public class NextcloudBackupProvider : IBackupProvider |
| | | 11 | | { |
| | | 12 | | private readonly HttpClient _httpClient; |
| | | 13 | | private readonly ISettingsService _settings; |
| | | 14 | | |
| | 0 | 15 | | public NextcloudBackupProvider(HttpClient httpClient, ISettingsService settings) |
| | | 16 | | { |
| | 0 | 17 | | _httpClient = httpClient; |
| | 0 | 18 | | _settings = settings; |
| | 0 | 19 | | } |
| | | 20 | | |
| | | 21 | | public async Task BackupAsync(string dbPath) |
| | | 22 | | { |
| | 0 | 23 | | var (webDavUrl, auth) = GetConfig(); |
| | 0 | 24 | | await EnsureFolderExistsAsync(webDavUrl, auth); |
| | | 25 | | |
| | 0 | 26 | | var fileName = $"lifechart_backup_{DateTime.Today:yyyy-MM-dd}.sqlite"; |
| | 0 | 27 | | var fileBytes = await File.ReadAllBytesAsync(dbPath); |
| | | 28 | | |
| | 0 | 29 | | var request = new HttpRequestMessage(HttpMethod.Put, $"{webDavUrl}{fileName}") |
| | 0 | 30 | | { |
| | 0 | 31 | | Headers = { Authorization = auth }, |
| | 0 | 32 | | Content = new ByteArrayContent(fileBytes) |
| | 0 | 33 | | }; |
| | 0 | 34 | | request.Content.Headers.ContentType = |
| | 0 | 35 | | new MediaTypeHeaderValue("application/octet-stream"); |
| | | 36 | | |
| | 0 | 37 | | var response = await _httpClient.SendAsync(request); |
| | 0 | 38 | | response.EnsureSuccessStatusCode(); |
| | 0 | 39 | | } |
| | | 40 | | |
| | | 41 | | public async Task<IEnumerable<BackupInfo>> ListBackupsAsync() |
| | | 42 | | { |
| | 0 | 43 | | var (webDavUrl, auth) = GetConfig(); |
| | | 44 | | |
| | 0 | 45 | | var request = new HttpRequestMessage(new HttpMethod("PROPFIND"), webDavUrl) |
| | 0 | 46 | | { |
| | 0 | 47 | | Content = new StringContent(PropfindBody, Encoding.UTF8, "application/xml") |
| | 0 | 48 | | }; |
| | 0 | 49 | | request.Headers.Authorization = auth; |
| | 0 | 50 | | request.Headers.Add("Depth", "1"); |
| | | 51 | | |
| | 0 | 52 | | var response = await _httpClient.SendAsync(request); |
| | 0 | 53 | | if (!response.IsSuccessStatusCode) return []; |
| | | 54 | | |
| | 0 | 55 | | var xml = await response.Content.ReadAsStringAsync(); |
| | 0 | 56 | | return ParsePropfindResponse(xml); |
| | 0 | 57 | | } |
| | | 58 | | |
| | | 59 | | public async Task RestoreAsync(BackupInfo backup, string targetPath) |
| | | 60 | | { |
| | 0 | 61 | | var (webDavUrl, auth) = GetConfig(); |
| | | 62 | | |
| | 0 | 63 | | var request = new HttpRequestMessage(HttpMethod.Get, $"{webDavUrl}{backup.FileName}") |
| | 0 | 64 | | { |
| | 0 | 65 | | Headers = { Authorization = auth } |
| | 0 | 66 | | }; |
| | | 67 | | |
| | 0 | 68 | | var response = await _httpClient.SendAsync(request); |
| | 0 | 69 | | response.EnsureSuccessStatusCode(); |
| | | 70 | | |
| | 0 | 71 | | var bytes = await response.Content.ReadAsByteArrayAsync(); |
| | 0 | 72 | | await File.WriteAllBytesAsync(targetPath, bytes); |
| | 0 | 73 | | } |
| | | 74 | | |
| | | 75 | | private (string webDavUrl, AuthenticationHeaderValue auth) GetConfig() |
| | | 76 | | { |
| | 0 | 77 | | var settings = _settings.Load(); |
| | | 78 | | |
| | 0 | 79 | | if (string.IsNullOrEmpty(settings.NextcloudUrl) || |
| | 0 | 80 | | string.IsNullOrEmpty(settings.NextcloudUsername) || |
| | 0 | 81 | | string.IsNullOrEmpty(settings.NextcloudPassword)) |
| | 0 | 82 | | throw new InvalidOperationException("Nextcloud ist nicht konfiguriert."); |
| | | 83 | | |
| | 0 | 84 | | var baseUrl = settings.NextcloudUrl.TrimEnd('/'); |
| | 0 | 85 | | var webDavUrl = |
| | 0 | 86 | | $"{baseUrl}/remote.php/dav/files/{settings.NextcloudUsername}/LifeChart/"; |
| | | 87 | | |
| | 0 | 88 | | var credentials = Convert.ToBase64String( |
| | 0 | 89 | | Encoding.UTF8.GetBytes( |
| | 0 | 90 | | $"{settings.NextcloudUsername}:{settings.NextcloudPassword}")); |
| | 0 | 91 | | var auth = new AuthenticationHeaderValue("Basic", credentials); |
| | | 92 | | |
| | 0 | 93 | | return (webDavUrl, auth); |
| | | 94 | | } |
| | | 95 | | |
| | | 96 | | private async Task EnsureFolderExistsAsync(string webDavUrl, AuthenticationHeaderValue auth) |
| | | 97 | | { |
| | 0 | 98 | | var request = new HttpRequestMessage(new HttpMethod("MKCOL"), webDavUrl) |
| | 0 | 99 | | { |
| | 0 | 100 | | Headers = { Authorization = auth } |
| | 0 | 101 | | }; |
| | | 102 | | // 201 Created or 405 Method Not Allowed (folder exists) — beide OK |
| | 0 | 103 | | await _httpClient.SendAsync(request); |
| | 0 | 104 | | } |
| | | 105 | | |
| | | 106 | | private static IEnumerable<BackupInfo> ParsePropfindResponse(string xml) |
| | | 107 | | { |
| | 0 | 108 | | var doc = XDocument.Parse(xml); |
| | 0 | 109 | | XNamespace dav = "DAV:"; |
| | | 110 | | |
| | 0 | 111 | | return doc.Descendants(dav + "response") |
| | 0 | 112 | | .Where(r => |
| | 0 | 113 | | { |
| | 0 | 114 | | var href = r.Element(dav + "href")?.Value ?? string.Empty; |
| | 0 | 115 | | return href.EndsWith(".sqlite", StringComparison.OrdinalIgnoreCase); |
| | 0 | 116 | | }) |
| | 0 | 117 | | .Select(r => |
| | 0 | 118 | | { |
| | 0 | 119 | | var href = r.Element(dav + "href")!.Value; |
| | 0 | 120 | | var fileName = Uri.UnescapeDataString(href.Split('/').Last()); |
| | 0 | 121 | | var lastModStr = r.Descendants(dav + "getlastmodified") |
| | 0 | 122 | | .FirstOrDefault()?.Value ?? string.Empty; |
| | 0 | 123 | | DateTime.TryParse(lastModStr, CultureInfo.CurrentCulture, out var lastMod); |
| | 0 | 124 | | var sizeStr = r.Descendants(dav + "getcontentlength") |
| | 0 | 125 | | .FirstOrDefault()?.Value ?? "0"; |
| | 0 | 126 | | long.TryParse(sizeStr, out var size); |
| | 0 | 127 | | return new BackupInfo(fileName, lastMod, size); |
| | 0 | 128 | | }) |
| | 0 | 129 | | .OrderByDescending(b => b.CreatedAt); |
| | | 130 | | } |
| | | 131 | | |
| | | 132 | | private const string PropfindBody = """ |
| | | 133 | | <?xml version="1.0" encoding="utf-8"?> |
| | | 134 | | <d:propfind xmlns:d="DAV:"> |
| | | 135 | | <d:prop> |
| | | 136 | | <d:getlastmodified/> |
| | | 137 | | <d:getcontentlength/> |
| | | 138 | | </d:prop> |
| | | 139 | | </d:propfind> |
| | | 140 | | """; |
| | | 141 | | } |