git_bsmd/nsw/Source/bsmd.email/BSMDMail.cs

//
//  Class:			Mail
//	Current CLR:	4.0.30319.34209
//	System:			Microsoft Visual Studio 10.0
//	Author:			dani
// 	Created:		5/28/2015 10:24:12 AM
//
//	Copyright (c) 2015 Informatikbüro Daniel Schick. All rights reserved.

using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Mime;
using System.Net.Mail;
using log4net;
using System.Security.Cryptography.X509Certificates;
using System.Net.Security;

namespace bsmd.email
{
    public class BSMDMail : IDisposable
    {
        private SmtpClient client;
        ILog log = LogManager.GetLogger(typeof(BSMDMail));

        internal BSMDMail()
        {
            this.client = new SmtpClient();
            NetworkCredential basicCredential = new NetworkCredential(Properties.Settings.Default.SMTPUser,
                Properties.Settings.Default.SMTPPassword);

            // setup up the host, increase the timeout to 5 minutes
            this.client.Host = Properties.Settings.Default.SMTPServer;
            this.client.UseDefaultCredentials = false;
            this.client.Credentials = basicCredential;
            this.client.Timeout = (60 * 5 * 1000);
            this.client.EnableSsl = true;

            // evil workaround for invalid BSMD E-Mail certificate!
            ServicePointManager.ServerCertificateValidationCallback = delegate (object s, X509Certificate certificate, X509Chain chain, 
                SslPolicyErrors sslPolicyErrors)
            { return true; };

        }

        internal void Send(MailMessage message)
        {
            // doch nicht asynchron, da nur eine Nachricht gleichzeitig geschickt werden kann und ich so den sync code spare
            try
            {
                this.client.Send(message);
                log.InfoFormat("Email sending to {0} successful.", message.To.ToString());
            }
            catch (SmtpException smtpException)
            {
                log.ErrorFormat("SMTP error while sending e-mail:{0}", smtpException.Message);
            }
            catch (Exception ex)
            {
                log.ErrorFormat("other error while sending e-mail:{0}", ex.Message);
            }

            // http://stackoverflow.com/questions/7276375/what-are-best-practices-for-using-smtpclient-sendasync-and-dispose-under-net-4
            // asynchron schicken und wenn's erledigt ist gleich disposen (wichtig!)
            
            // in meinem Fall nicht so recht wirksam, da eine Mail meist an mehrere Empfänger geschickt wird

            /*
            smtpClient.SendCompleted += (s, e) =>
            {
                smtpClient.Dispose();
                message.Dispose();
            };

            smtpClient.SendAsync(message, null);
            */


        }


        public static void SendNSWReportWithAttachments(string subject, List<string> filenameList)
        {

            using (BSMDMail mailer = new BSMDMail())
            {
                foreach (string recipient in Properties.Settings.Default.Recipient)
                {
                    MailMessage message = new MailMessage();
                    MailAddress fromAddress = new MailAddress(Properties.Settings.Default.Sender);

                    message.From = fromAddress;
                    message.Subject = string.Format(subject);
                    message.IsBodyHtml = false;
                    message.Body = "see attachment";
                    message.To.Add(recipient);

                    foreach (string filename in filenameList)
                    {
                        Attachment attachment = new Attachment(filename, MediaTypeNames.Application.Octet);
                        ContentDisposition disposition = attachment.ContentDisposition;
                        disposition.CreationDate = File.GetCreationTime(filename);
                        disposition.ModificationDate = File.GetLastWriteTime(filename);
                        disposition.ReadDate = File.GetLastAccessTime(filename);
                        disposition.FileName = Path.GetFileName(filename);
                        disposition.Size = new FileInfo(filename).Length;
                        disposition.DispositionType = DispositionTypeNames.Attachment;
                        message.Attachments.Add(attachment);
                    }

                    mailer.Send(message);

                    message.Dispose();

                }
            }
        }

        public static void SendSystemInfo(string subject, string body, string recipient)
        {
            using (BSMDMail mailer = new BSMDMail())
            {
                MailMessage message = new MailMessage();
                MailAddress fromAddress = new MailAddress(Properties.Settings.Default.Sender);
                message.From = fromAddress;
                message.Subject = subject;
                message.IsBodyHtml = false;
                message.Body = body;

                message.To.Add(recipient);
                MailAddress adminAddress = new MailAddress(Properties.Settings.Default.AdminEmail);
                message.CC.Add(adminAddress);

                mailer.Send(message);
            }
        }

        public void Dispose()
        {
            this.client.Dispose();
        }
    }
}