| | | 1 | | using MailKit; |
| | | 2 | | using MailKit.Net.Imap; |
| | | 3 | | using MailKit.Search; |
| | | 4 | | using Microsoft.Extensions.Logging; |
| | | 5 | | using Microsoft.Extensions.Options; |
| | | 6 | | using MimeKit; |
| | | 7 | | |
| | | 8 | | namespace Services.EmailRoutingServices; |
| | | 9 | | |
| | | 10 | | public class ImapEmailInboxClient : IEmailInboxClient |
| | | 11 | | { |
| | | 12 | | private readonly IOptionsMonitor<ImapSettings> _settings; |
| | | 13 | | private readonly ILogger<ImapEmailInboxClient> _logger; |
| | | 14 | | |
| | 0 | 15 | | private static readonly MessageSummaryItems SummaryItems = |
| | 0 | 16 | | MessageSummaryItems.UniqueId |
| | 0 | 17 | | | MessageSummaryItems.Flags |
| | 0 | 18 | | | MessageSummaryItems.Headers |
| | 0 | 19 | | | MessageSummaryItems.InternalDate; |
| | | 20 | | |
| | 2 | 21 | | public ImapEmailInboxClient(IOptionsMonitor<ImapSettings> settings, ILogger<ImapEmailInboxClient> logger) |
| | | 22 | | { |
| | 2 | 23 | | _settings = settings; |
| | 2 | 24 | | _logger = logger; |
| | 2 | 25 | | } |
| | | 26 | | |
| | 2 | 27 | | private ImapSettings Settings => _settings.CurrentValue; |
| | | 28 | | |
| | | 29 | | public async Task<ImapConnectionStatus> GetConnectionStatusAsync(CancellationToken cancellationToken = default) |
| | 2 | 30 | | => await ImapConnectionTester.CheckAsync(Settings, _logger, cancellationToken); |
| | | 31 | | |
| | 0 | 32 | | internal static readonly TimeSpan[] DefaultRetryDelays = |
| | 0 | 33 | | [ |
| | 0 | 34 | | TimeSpan.FromSeconds(1), |
| | 0 | 35 | | TimeSpan.FromSeconds(2), |
| | 0 | 36 | | TimeSpan.FromSeconds(4) |
| | 0 | 37 | | ]; |
| | | 38 | | |
| | | 39 | | /// <summary> |
| | | 40 | | /// Транзиентный сбой связи с IMAP-сервером (разрыв сокета, TLS, протокол, таймаут). |
| | | 41 | | /// Ошибки БД (<see cref="System.Data.Common.DbException"/>, <see cref="Microsoft.EntityFrameworkCore.DbUpdateExcept |
| | | 42 | | /// и файловой системы намеренно не считаются транзиентными, даже если внутри у них SocketException/IOException — |
| | | 43 | | /// иначе падение MariaDB в ProcessInboxAsync маскировалось бы под «временную недоступность почты». |
| | | 44 | | /// </summary> |
| | | 45 | | public static bool IsTransientConnectionException(Exception ex) |
| | | 46 | | { |
| | 16 | 47 | | if (ex is OperationCanceledException) |
| | | 48 | | { |
| | 1 | 49 | | return false; |
| | | 50 | | } |
| | | 51 | | |
| | 15 | 52 | | if (ex is MailKit.Security.AuthenticationException) |
| | | 53 | | { |
| | 1 | 54 | | return false; |
| | | 55 | | } |
| | | 56 | | |
| | 14 | 57 | | if (ex is System.Data.Common.DbException or Microsoft.EntityFrameworkCore.DbUpdateException) |
| | | 58 | | { |
| | 2 | 59 | | return false; |
| | | 60 | | } |
| | | 61 | | |
| | 12 | 62 | | if (ex is System.IO.FileNotFoundException or System.IO.DirectoryNotFoundException or System.IO.PathTooLongExcept |
| | | 63 | | { |
| | 2 | 64 | | return false; |
| | | 65 | | } |
| | | 66 | | |
| | 10 | 67 | | return ex switch |
| | 10 | 68 | | { |
| | 1 | 69 | | MailKit.Net.Imap.ImapProtocolException => true, |
| | 1 | 70 | | MailKit.Security.SslHandshakeException => true, |
| | 1 | 71 | | MailKit.ServiceNotConnectedException => true, |
| | 0 | 72 | | MailKit.ServiceNotAuthenticatedException => true, |
| | 3 | 73 | | System.Net.Sockets.SocketException => true, |
| | 1 | 74 | | System.IO.IOException => true, |
| | 1 | 75 | | System.TimeoutException => true, |
| | 2 | 76 | | _ => ex.InnerException != null && IsTransientConnectionException(ex.InnerException) |
| | 10 | 77 | | }; |
| | | 78 | | } |
| | | 79 | | |
| | | 80 | | private async Task<(ImapClient Client, IMailFolder Inbox)> ConnectAndOpenInboxWithRetryAsync( |
| | | 81 | | ImapSettings settings, |
| | | 82 | | FolderAccess access, |
| | | 83 | | CancellationToken cancellationToken) |
| | | 84 | | { |
| | | 85 | | const int maxAttempts = 3; |
| | 0 | 86 | | var delays = DefaultRetryDelays; |
| | | 87 | | |
| | 0 | 88 | | for (var attempt = 1; attempt <= maxAttempts; attempt++) |
| | | 89 | | { |
| | 0 | 90 | | var client = new ImapClient(); |
| | | 91 | | try |
| | | 92 | | { |
| | 0 | 93 | | await client.ConnectAsync(settings.Host, settings.Port, settings.UseSsl, cancellationToken); |
| | 0 | 94 | | await client.AuthenticateAsync(settings.UserName, settings.Password, cancellationToken); |
| | | 95 | | |
| | 0 | 96 | | var inbox = client.GetFolder(settings.Folder); |
| | 0 | 97 | | await inbox.OpenAsync(access, cancellationToken); |
| | | 98 | | |
| | 0 | 99 | | return (client, inbox); |
| | | 100 | | } |
| | 0 | 101 | | catch (Exception ex) when (attempt < maxAttempts && IsTransientConnectionException(ex) && !cancellationToken |
| | | 102 | | { |
| | 0 | 103 | | _logger.LogInformation( |
| | 0 | 104 | | ex, |
| | 0 | 105 | | "Временный сбой подключения к IMAP {Host}:{Port} (попытка {Attempt}/{MaxAttempts}): {Message}. Повто |
| | 0 | 106 | | settings.Host, |
| | 0 | 107 | | settings.Port, |
| | 0 | 108 | | attempt, |
| | 0 | 109 | | maxAttempts, |
| | 0 | 110 | | ex.Message, |
| | 0 | 111 | | delays[attempt - 1].TotalSeconds); |
| | | 112 | | |
| | | 113 | | try |
| | | 114 | | { |
| | 0 | 115 | | if (client.IsConnected) |
| | | 116 | | { |
| | 0 | 117 | | await client.DisconnectAsync(true, cancellationToken); |
| | | 118 | | } |
| | 0 | 119 | | } |
| | 0 | 120 | | catch |
| | | 121 | | { |
| | | 122 | | // Игнорируем вторичные ошибки разрыва при уже сбойном сокете |
| | 0 | 123 | | } |
| | | 124 | | finally |
| | | 125 | | { |
| | 0 | 126 | | client.Dispose(); |
| | | 127 | | } |
| | | 128 | | |
| | 0 | 129 | | await Task.Delay(delays[attempt - 1], cancellationToken); |
| | 0 | 130 | | } |
| | 0 | 131 | | catch |
| | | 132 | | { |
| | | 133 | | try |
| | | 134 | | { |
| | 0 | 135 | | if (client.IsConnected) |
| | | 136 | | { |
| | 0 | 137 | | await client.DisconnectAsync(true, cancellationToken); |
| | | 138 | | } |
| | 0 | 139 | | } |
| | 0 | 140 | | catch |
| | | 141 | | { |
| | | 142 | | // Игнорируем вторичные ошибки разрыва |
| | 0 | 143 | | } |
| | | 144 | | finally |
| | | 145 | | { |
| | 0 | 146 | | client.Dispose(); |
| | | 147 | | } |
| | | 148 | | |
| | 0 | 149 | | throw; |
| | | 150 | | } |
| | 0 | 151 | | } |
| | | 152 | | |
| | 0 | 153 | | throw new InvalidOperationException("Unreachable"); |
| | 0 | 154 | | } |
| | | 155 | | |
| | | 156 | | public async Task<List<InboxMessageDto>> FetchMessagesAsync( |
| | | 157 | | InboxKnownMessages? knownMessages = null, |
| | | 158 | | CancellationToken cancellationToken = default) |
| | | 159 | | { |
| | 0 | 160 | | var results = new List<InboxMessageDto>(); |
| | 0 | 161 | | var settings = Settings; |
| | 0 | 162 | | if (string.IsNullOrWhiteSpace(settings.Host) || string.IsNullOrWhiteSpace(settings.UserName)) |
| | | 163 | | { |
| | 0 | 164 | | _logger.LogWarning("IMAP settings are not configured. Skipping inbox polling."); |
| | 0 | 165 | | return results; |
| | | 166 | | } |
| | | 167 | | |
| | 0 | 168 | | var (client, inbox) = await ConnectAndOpenInboxWithRetryAsync(settings, FolderAccess.ReadWrite, cancellationToke |
| | 0 | 169 | | using (client) |
| | | 170 | | { |
| | 0 | 171 | | if (inbox.Count == 0) |
| | | 172 | | { |
| | 0 | 173 | | await client.DisconnectAsync(true, cancellationToken); |
| | 0 | 174 | | return results; |
| | | 175 | | } |
| | | 176 | | |
| | 0 | 177 | | var headerFetchCap = ImapFetchWindow.ResolveScanLimit(settings); |
| | 0 | 178 | | var summaries = await LoadUnprocessedSummariesAsync(inbox, knownMessages, headerFetchCap, cancellationToken) |
| | | 179 | | |
| | | 180 | | // Окно по дате (по умолчанию последние 3 суток + сегодня, см. ImapFetchWindow.ResolveSinceUtc) — теперь |
| | | 181 | | // применяется всегда, а не только при явном FetchAfterUtc. Раньше без даты-порога свежие письма могли |
| | | 182 | | // застрять позади огромного FIFO-беклога недообработанных старых писем (headerFetchCap ограничен) — |
| | | 183 | | // актуальная почта не читалась, пока не дренируется весь беклог. Старую почту вне окна auto-polling |
| | | 184 | | // больше не трогает вовсе — она остаётся для ручного Reprocess/.cursor/skills/load-exist-orders/SKILL.md. |
| | 0 | 185 | | var sinceUtc = ImapFetchWindow.ResolveSinceUtc(settings); |
| | 0 | 186 | | var filtered = summaries.Where(s => (s.InternalDate?.UtcDateTime ?? DateTime.MinValue) >= sinceUtc); |
| | | 187 | | |
| | 0 | 188 | | var candidates = filtered |
| | 0 | 189 | | .OrderByDescending(s => s.InternalDate ?? DateTimeOffset.MinValue) // новые (актуальные) — в приоритете |
| | 0 | 190 | | .ThenByDescending(s => s.UniqueId.Id) |
| | 0 | 191 | | .ToList(); |
| | | 192 | | |
| | 0 | 193 | | _logger.LogInformation( |
| | 0 | 194 | | "IMAP fetch: headerFetchCap {HeaderFetchCap}, fetched summaries {Scanned}, candidates {Candidates}, known ex |
| | 0 | 195 | | headerFetchCap, |
| | 0 | 196 | | summaries.Count, |
| | 0 | 197 | | candidates.Count, |
| | 0 | 198 | | knownMessages?.ExternalIds.Count ?? 0, |
| | 0 | 199 | | knownMessages?.Uids.Count ?? 0); |
| | | 200 | | |
| | 0 | 201 | | foreach (var summary in candidates) |
| | | 202 | | { |
| | 0 | 203 | | if (results.Count >= settings.FetchLimit) |
| | | 204 | | { |
| | | 205 | | break; |
| | | 206 | | } |
| | | 207 | | |
| | 0 | 208 | | var headerMessageId = summary.Headers?[HeaderId.MessageId]; |
| | 0 | 209 | | if (knownMessages?.IsKnown(summary.UniqueId, headerMessageId) == true) |
| | | 210 | | { |
| | | 211 | | continue; |
| | | 212 | | } |
| | | 213 | | |
| | 0 | 214 | | var message = await inbox.GetMessageAsync(summary.UniqueId, cancellationToken); |
| | 0 | 215 | | if (knownMessages?.IsKnown(summary.UniqueId, message.MessageId) == true) |
| | | 216 | | { |
| | | 217 | | continue; |
| | | 218 | | } |
| | | 219 | | |
| | 0 | 220 | | var receivedAtUtc = summary.InternalDate?.UtcDateTime ?? message.Date.UtcDateTime; |
| | 0 | 221 | | results.Add(MapMessage(summary.UniqueId, message, receivedAtUtc)); |
| | | 222 | | |
| | 0 | 223 | | var flags = summary.Flags.GetValueOrDefault(MessageFlags.None); |
| | 0 | 224 | | if (!flags.HasFlag(MessageFlags.Seen)) |
| | | 225 | | { |
| | 0 | 226 | | await inbox.AddFlagsAsync(summary.UniqueId, MessageFlags.Seen, true, cancellationToken); |
| | | 227 | | } |
| | 0 | 228 | | } |
| | | 229 | | |
| | 0 | 230 | | await client.DisconnectAsync(true, cancellationToken); |
| | 0 | 231 | | return results; |
| | | 232 | | } |
| | 0 | 233 | | } |
| | | 234 | | |
| | | 235 | | /// <summary> |
| | | 236 | | /// Используется только диагностикой (<see cref="ImapConnectionTester"/>) для UI-статуса |
| | | 237 | | /// "сколько писем готово" — старое поведение (топ-N свежих UID + непрочитанные), не влияет на pipeline. |
| | | 238 | | /// </summary> |
| | | 239 | | internal static async Task<IList<IMessageSummary>> LoadRecentSummariesAsync( |
| | | 240 | | IMailFolder inbox, |
| | | 241 | | int scanLimit, |
| | | 242 | | CancellationToken cancellationToken) |
| | | 243 | | { |
| | 0 | 244 | | var summaries = new List<IMessageSummary>(); |
| | | 245 | | |
| | 0 | 246 | | var allUids = await inbox.SearchAsync(SearchQuery.All, cancellationToken); |
| | 0 | 247 | | if (allUids.Count > 0) |
| | | 248 | | { |
| | 0 | 249 | | var recentUids = allUids |
| | 0 | 250 | | .OrderByDescending(x => x.Id) |
| | 0 | 251 | | .Take(scanLimit) |
| | 0 | 252 | | .ToList(); |
| | 0 | 253 | | var recentSummaries = await inbox.FetchAsync(recentUids, SummaryItems, cancellationToken); |
| | 0 | 254 | | summaries.AddRange(recentSummaries); |
| | | 255 | | } |
| | | 256 | | |
| | 0 | 257 | | var unseenUids = await inbox.SearchAsync(SearchQuery.NotSeen, cancellationToken); |
| | 0 | 258 | | if (unseenUids.Count > 0) |
| | | 259 | | { |
| | 0 | 260 | | var knownUids = summaries.Select(x => x.UniqueId).ToHashSet(); |
| | 0 | 261 | | var extraUnseen = unseenUids.Where(uid => !knownUids.Contains(uid)).ToList(); |
| | 0 | 262 | | if (extraUnseen.Count > 0) |
| | | 263 | | { |
| | 0 | 264 | | var extraSummaries = await inbox.FetchAsync(extraUnseen, SummaryItems, cancellationToken); |
| | 0 | 265 | | summaries.AddRange(extraSummaries); |
| | | 266 | | } |
| | | 267 | | } |
| | | 268 | | |
| | 0 | 269 | | return summaries |
| | 0 | 270 | | .GroupBy(x => x.UniqueId) |
| | 0 | 271 | | .Select(g => g.First()) |
| | 0 | 272 | | .ToList(); |
| | 0 | 273 | | } |
| | | 274 | | |
| | | 275 | | /// <summary> |
| | | 276 | | /// Используется реальным pipeline обработки почты (<see cref="FetchMessagesAsync"/>). |
| | | 277 | | /// В отличие от <see cref="LoadRecentSummariesAsync"/>, источник истины "обработано/нет" — |
| | | 278 | | /// не "последние N по дате/UID", а фактический набор уже известных писем в БД (<paramref name="knownMessages"/>): |
| | | 279 | | /// сначала дёшево получаем полный список UID в папке (без заголовков), локально отсеиваем уже известные, |
| | | 280 | | /// и только для действительно новых/необработанных запрашиваем заголовки (ограничено headerFetchCap). |
| | | 281 | | /// </summary> |
| | | 282 | | internal static async Task<IList<IMessageSummary>> LoadUnprocessedSummariesAsync( |
| | | 283 | | IMailFolder inbox, |
| | | 284 | | InboxKnownMessages? knownMessages, |
| | | 285 | | int headerFetchCap, |
| | | 286 | | CancellationToken cancellationToken) |
| | | 287 | | { |
| | 0 | 288 | | var allUids = await inbox.SearchAsync(SearchQuery.All, cancellationToken); |
| | 0 | 289 | | if (allUids.Count == 0) |
| | 0 | 290 | | return new List<IMessageSummary>(); |
| | | 291 | | |
| | 0 | 292 | | var unknownUids = allUids |
| | 0 | 293 | | .Where(uid => knownMessages == null || !knownMessages.Uids.Contains(uid.Id.ToString())) |
| | 0 | 294 | | .OrderByDescending(uid => uid.Id) // новые в приоритете — не дать старому беклогу съесть headerFetchCap |
| | 0 | 295 | | .Take(headerFetchCap) // защитный cap, чтобы не тянуть заголовки огромного архива разом |
| | 0 | 296 | | .ToList(); |
| | | 297 | | |
| | 0 | 298 | | if (unknownUids.Count == 0) |
| | 0 | 299 | | return new List<IMessageSummary>(); |
| | | 300 | | |
| | 0 | 301 | | return await inbox.FetchAsync(unknownUids, SummaryItems, cancellationToken); |
| | 0 | 302 | | } |
| | | 303 | | |
| | | 304 | | public static string ResolveMessageExternalId(UniqueId uid, string? headerMessageId) => |
| | 2 | 305 | | string.IsNullOrWhiteSpace(headerMessageId) |
| | 2 | 306 | | ? $"uid-{uid.Id}" |
| | 2 | 307 | | : headerMessageId.Trim(); |
| | | 308 | | |
| | | 309 | | public static IEnumerable<string> GetExternalIdLookupKeys(UniqueId uid, string? messageId) |
| | | 310 | | { |
| | 6 | 311 | | var trimmed = string.IsNullOrWhiteSpace(messageId) ? null : messageId.Trim(); |
| | 6 | 312 | | if (!string.IsNullOrEmpty(trimmed)) |
| | | 313 | | { |
| | 5 | 314 | | yield return trimmed; |
| | 4 | 315 | | if (trimmed.StartsWith('<') && trimmed.EndsWith('>') && trimmed.Length > 2) |
| | | 316 | | { |
| | 4 | 317 | | var inner = trimmed[1..^1].Trim(); |
| | 4 | 318 | | if (!string.IsNullOrEmpty(inner)) |
| | | 319 | | { |
| | 4 | 320 | | yield return inner; |
| | | 321 | | } |
| | | 322 | | } |
| | | 323 | | else |
| | | 324 | | { |
| | 0 | 325 | | yield return $"<{trimmed}>"; |
| | | 326 | | } |
| | | 327 | | } |
| | | 328 | | |
| | 4 | 329 | | yield return $"uid-{uid.Id}"; |
| | 4 | 330 | | } |
| | | 331 | | |
| | | 332 | | private static InboxMessageDto MapMessage(UniqueId uid, MimeMessage message, DateTime receivedAtUtc) |
| | | 333 | | { |
| | 0 | 334 | | var dto = new InboxMessageDto |
| | 0 | 335 | | { |
| | 0 | 336 | | MessageExternalId = ResolveMessageExternalId(uid, message.MessageId), |
| | 0 | 337 | | Uid = uid.Id.ToString(), |
| | 0 | 338 | | SenderEmail = message.From.Mailboxes.FirstOrDefault()?.Address, |
| | 0 | 339 | | Subject = message.Subject, |
| | 0 | 340 | | BodyText = message.TextBody ?? message.HtmlBody, |
| | 0 | 341 | | ReceivedAtUtc = receivedAtUtc, |
| | 0 | 342 | | Attachments = new List<InboxAttachmentDto>() |
| | 0 | 343 | | }; |
| | | 344 | | |
| | 0 | 345 | | foreach (var entity in message.Attachments) |
| | | 346 | | { |
| | 0 | 347 | | if (entity is not MimePart part) |
| | | 348 | | { |
| | | 349 | | continue; |
| | | 350 | | } |
| | | 351 | | |
| | 0 | 352 | | using var stream = new MemoryStream(); |
| | 0 | 353 | | part.Content.DecodeTo(stream); |
| | 0 | 354 | | var bytes = stream.ToArray(); |
| | 0 | 355 | | var fileName = string.IsNullOrWhiteSpace(part.FileName) ? $"attachment-{Guid.NewGuid():N}" : part.FileName; |
| | | 356 | | |
| | 0 | 357 | | dto.Attachments.Add(new InboxAttachmentDto |
| | 0 | 358 | | { |
| | 0 | 359 | | FileName = fileName, |
| | 0 | 360 | | Extension = Path.GetExtension(fileName).ToLowerInvariant(), |
| | 0 | 361 | | FileSizeBytes = bytes.LongLength, |
| | 0 | 362 | | FileBytes = bytes |
| | 0 | 363 | | }); |
| | | 364 | | } |
| | | 365 | | |
| | 0 | 366 | | return dto; |
| | | 367 | | } |
| | | 368 | | } |