346 lines
12 KiB
C#
346 lines
12 KiB
C#
/*
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*
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* (c) Copyright Ascensio System Limited 2010-2018
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*
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* This program is freeware. You can redistribute it and/or modify it under the terms of the GNU
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* General Public License (GPL) version 3 as published by the Free Software Foundation (https://www.gnu.org/copyleft/gpl.html).
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* In accordance with Section 7(a) of the GNU GPL its Section 15 shall be amended to the effect that
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* Ascensio System SIA expressly excludes the warranty of non-infringement of any third-party rights.
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*
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* THIS PROGRAM IS DISTRIBUTED WITHOUT ANY WARRANTY; WITHOUT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. For more details, see GNU GPL at https://www.gnu.org/copyleft/gpl.html
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*
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* You can contact Ascensio System SIA by email at sales@onlyoffice.com
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*
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* The interactive user interfaces in modified source and object code versions of ONLYOFFICE must display
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* Appropriate Legal Notices, as required under Section 5 of the GNU GPL version 3.
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*
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* Pursuant to Section 7 § 3(b) of the GNU GPL you must retain the original ONLYOFFICE logo which contains
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* relevant author attributions when distributing the software. If the display of the logo in its graphic
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* form is not reasonably feasible for technical reasons, you must include the words "Powered by ONLYOFFICE"
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* in every copy of the program you distribute.
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* Pursuant to Section 7 § 3(e) we decline to grant you any rights under trademark law for use of our trademarks.
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*
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*/
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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.Net;
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using ASC.Common;
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using ASC.Common.Logging;
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using ASC.Common.Utils;
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using ASC.Notify.Messages;
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using ASC.Notify.Patterns;
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using MailKit;
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using MailKit.Security;
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using Microsoft.Extensions.Configuration;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Options;
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using MimeKit;
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namespace ASC.Core.Notify.Senders
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{
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internal class SmtpSender : INotifySender
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{
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private const string HTML_FORMAT =
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@"<!DOCTYPE html PUBLIC ""-//W3C//DTD HTML 4.01 Transitional//EN"">
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<html>
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<head>
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<meta content=""text/html;charset=UTF-8"" http-equiv=""Content-Type"">
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</head>
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<body>{0}</body>
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</html>";
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protected ILog Log { get; set; }
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protected IConfiguration Configuration { get; }
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protected IServiceProvider ServiceProvider { get; }
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private string Host { get; set; }
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private int Port { get; set; }
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private bool Ssl { get; set; }
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private ICredentials Credentials { get; set; }
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protected bool UseCoreSettings { get; set; }
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const int NETWORK_TIMEOUT = 30000;
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public SmtpSender(
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IServiceProvider serviceProvider,
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IOptionsMonitor<ILog> options)
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{
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Log = options.Get("ASC.Notify");
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Configuration = serviceProvider.GetService<IConfiguration>();
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ServiceProvider = serviceProvider;
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}
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public virtual void Init(IDictionary<string, string> properties)
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{
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if (properties.ContainsKey("useCoreSettings") && bool.Parse(properties["useCoreSettings"]))
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{
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UseCoreSettings = true;
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}
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else
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{
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Host = properties["host"];
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Port = properties.ContainsKey("port") ? int.Parse(properties["port"]) : 25;
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Ssl = properties.ContainsKey("enableSsl") && bool.Parse(properties["enableSsl"]);
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if (properties.ContainsKey("userName"))
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{
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Credentials = new NetworkCredential(
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properties["userName"],
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properties["password"]);
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}
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}
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}
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private void InitUseCoreSettings(CoreConfiguration configuration)
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{
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var s = configuration.SmtpSettings;
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Host = s.Host;
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Port = s.Port;
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Ssl = s.EnableSSL;
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Credentials = !string.IsNullOrEmpty(s.CredentialsUserName)
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? new NetworkCredential(s.CredentialsUserName, s.CredentialsUserPassword)
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: null;
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}
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public virtual NoticeSendResult Send(NotifyMessage m)
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{
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using var scope = ServiceProvider.CreateScope();
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var scopeClass = scope.ServiceProvider.GetService<Scope>();
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scopeClass.TenantManager.SetCurrentTenant(m.Tenant);
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var smtpClient = GetSmtpClient();
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var result = NoticeSendResult.TryOnceAgain;
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try
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{
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try
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{
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if (UseCoreSettings)
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InitUseCoreSettings(scopeClass.CoreConfiguration);
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var mail = BuildMailMessage(m);
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Log.DebugFormat("SmtpSender - host={0}; port={1}; enableSsl={2} enableAuth={3}", Host, Port, Ssl, Credentials != null);
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smtpClient.Connect(Host, Port,
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Ssl ? SecureSocketOptions.Auto : SecureSocketOptions.None);
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if (Credentials != null)
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{
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smtpClient.Authenticate(Credentials);
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}
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smtpClient.Send(mail);
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result = NoticeSendResult.OK;
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}
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catch (Exception e)
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{
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Log.ErrorFormat("Tenant: {0}, To: {1} - {2}", m.Tenant, m.To, e);
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throw;
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}
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}
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catch (ObjectDisposedException)
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{
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result = NoticeSendResult.SendingImpossible;
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}
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catch (InvalidOperationException)
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{
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result = string.IsNullOrEmpty(Host) || Port == 0
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? NoticeSendResult.SendingImpossible
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: NoticeSendResult.TryOnceAgain;
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}
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catch (IOException)
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{
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result = NoticeSendResult.TryOnceAgain;
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}
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catch (MailKit.Net.Smtp.SmtpProtocolException)
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{
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result = NoticeSendResult.SendingImpossible;
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}
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catch (MailKit.Net.Smtp.SmtpCommandException e)
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{
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switch (e.StatusCode)
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{
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case MailKit.Net.Smtp.SmtpStatusCode.MailboxBusy:
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case MailKit.Net.Smtp.SmtpStatusCode.MailboxUnavailable:
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case MailKit.Net.Smtp.SmtpStatusCode.ExceededStorageAllocation:
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result = NoticeSendResult.TryOnceAgain;
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break;
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case MailKit.Net.Smtp.SmtpStatusCode.MailboxNameNotAllowed:
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case MailKit.Net.Smtp.SmtpStatusCode.UserNotLocalWillForward:
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case MailKit.Net.Smtp.SmtpStatusCode.UserNotLocalTryAlternatePath:
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result = NoticeSendResult.MessageIncorrect;
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break;
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default:
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if (e.StatusCode != MailKit.Net.Smtp.SmtpStatusCode.Ok)
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{
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result = NoticeSendResult.TryOnceAgain;
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}
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break;
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}
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}
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catch (Exception)
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{
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result = NoticeSendResult.SendingImpossible;
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}
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finally
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{
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if (smtpClient.IsConnected)
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smtpClient.Disconnect(true);
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smtpClient.Dispose();
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}
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return result;
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}
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private MimeMessage BuildMailMessage(NotifyMessage m)
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{
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var mimeMessage = new MimeMessage
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{
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Subject = m.Subject
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};
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var fromAddress = MailboxAddress.Parse(ParserOptions.Default, m.From);
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mimeMessage.From.Add(fromAddress);
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foreach (var to in m.To.Split(new[] { '|' }, StringSplitOptions.RemoveEmptyEntries))
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{
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mimeMessage.To.Add(MailboxAddress.Parse(ParserOptions.Default, to));
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}
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if (m.ContentType == Pattern.HTMLContentType)
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{
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var textPart = new TextPart("plain")
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{
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Text = HtmlUtil.GetText(m.Content),
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ContentTransferEncoding = ContentEncoding.QuotedPrintable
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};
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var multipartAlternative = new MultipartAlternative { textPart };
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var htmlPart = new TextPart("html")
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{
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Text = GetHtmlView(m.Content),
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ContentTransferEncoding = ContentEncoding.QuotedPrintable
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};
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if (m.EmbeddedAttachments != null && m.EmbeddedAttachments.Count > 0)
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{
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var multipartRelated = new MultipartRelated
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{
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Root = htmlPart
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};
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foreach (var attachment in m.EmbeddedAttachments)
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{
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var mimeEntity = ConvertAttachmentToMimePart(attachment);
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if (mimeEntity != null)
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multipartRelated.Add(mimeEntity);
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}
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multipartAlternative.Add(multipartRelated);
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}
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else
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{
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multipartAlternative.Add(htmlPart);
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}
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mimeMessage.Body = multipartAlternative;
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}
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else
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{
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mimeMessage.Body = new TextPart("plain")
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{
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Text = m.Content,
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ContentTransferEncoding = ContentEncoding.QuotedPrintable
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};
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}
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if (!string.IsNullOrEmpty(m.ReplyTo))
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{
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mimeMessage.ReplyTo.Add(MailboxAddress.Parse(ParserOptions.Default, m.ReplyTo));
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}
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mimeMessage.Headers.Add("Auto-Submitted", "auto-generated");
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return mimeMessage;
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}
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protected string GetHtmlView(string body)
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{
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return string.Format(HTML_FORMAT, body);
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}
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private MailKit.Net.Smtp.SmtpClient GetSmtpClient()
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{
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var sslCertificatePermit = Configuration["mail:certificate-permit"] != null &&
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Convert.ToBoolean(Configuration["mail:certificate-permit"]);
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var smtpClient = new MailKit.Net.Smtp.SmtpClient
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{
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ServerCertificateValidationCallback = (sender, certificate, chain, errors) =>
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sslCertificatePermit || MailService.DefaultServerCertificateValidationCallback(sender, certificate, chain, errors),
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Timeout = NETWORK_TIMEOUT
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};
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return smtpClient;
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}
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private static MimePart ConvertAttachmentToMimePart(NotifyMessageAttachment attachment)
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{
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try
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{
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if (attachment == null || string.IsNullOrEmpty(attachment.FileName) || string.IsNullOrEmpty(attachment.ContentId) || attachment.Content == null)
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return null;
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var extension = Path.GetExtension(attachment.FileName);
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if (string.IsNullOrEmpty(extension))
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return null;
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return new MimePart("image", extension.TrimStart('.'))
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{
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ContentId = attachment.ContentId,
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Content = new MimeContent(new MemoryStream(attachment.Content.ToByteArray())),
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ContentDisposition = new ContentDisposition(ContentDisposition.Attachment),
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ContentTransferEncoding = ContentEncoding.Base64,
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FileName = attachment.FileName
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};
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}
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catch (Exception)
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{
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return null;
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}
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}
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class Scope
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{
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internal TenantManager TenantManager { get; }
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internal CoreConfiguration CoreConfiguration { get; }
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public Scope(TenantManager tenantManager, CoreConfiguration coreConfiguration)
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{
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TenantManager = tenantManager;
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CoreConfiguration = coreConfiguration;
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}
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}
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}
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public static class SmtpSenderExtension
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{
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public static DIHelper AddSmtpSenderService(this DIHelper services)
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{
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services.TryAddSingleton<SmtpSender>();
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return services
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.AddTenantManagerService()
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.AddCoreSettingsService();
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}
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}
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} |