使用AWS SES c＃的附件创建MIME邮件 [英] Create MIME Mail with attachment for AWS SES c#

问题描述

我正在尝试使用SDK发送带附件的AWS SES邮件。我发现工作代码此处：

I am trying to send an AWS SES mail with attachment using SDK. I found working code here:

它是指 MimeKitLite ，但我们不能在.net框架3.5中引用。是否有任何解决方法我可以写我的代码发送邮件使用框架3.5？
由于某些依赖关系，我们无法升级我们的项目框架。

it refers MimeKitLite but this we can not refer in .net framework 3.5. Is there any workaround I can write in my code to send the mail using framework 3.5? due to some dependencies we cannot upgrade our project framework.

我在这里写我的工作代码（框架4）供参考：

I am writing here my working code (framework 4) for reference:

    protected void Page_Load(object sender, EventArgs e)
        {
            var message = (MimeMessage)MyMailMessage();
            var stream = new MemoryStream();
            message.WriteTo(stream);
            using (AmazonSimpleEmailServiceClient client = new AmazonSimpleEmailServiceClient("awsAccessKeyId", "awsSecretAccessKey", RegionEndpoint.USWest2))
            {
                var sendRequest = new SendRawEmailRequest { RawMessage = new RawMessage { Data = stream } };
                var response = client.SendRawEmail(sendRequest);
                Console.WriteLine(response.ToString());
            }
        }

   private static MimeKit.MimeMessage MyMailMessage()
        {
            var message = new MimeMessage();
            message.From.Add(new MailboxAddress("rahul", "[e-mail]"));
            message.To.Add(new MailboxAddress("rahul", "[e-mail]"));
            message.Subject = "Hello";
            var builder = new BodyBuilder();
            builder.HtmlBody = @"<p>Thank you for submitting your query/complaint.";
            //
            string attachement = System.Web.HttpContext.Current.Server.MapPath(Path.GetFileName("IntelOCL.log"));
            builder.LinkedResources.Add(attachement);
            message.Body = builder.ToMessageBody();
            return message;
        }

推荐答案

您可以使用.NET MailMessage 。这样做的问题是，您必须将Amazon SES的消息的原始内容发送到流中，并且此类没有直接的方法（afaik）。可以通过使用反射来实现：

You can use the .NET MailMessage class instead. The problem with this is that you have to give Amazon SES the raw content of the message in a stream and this class does not have a direct way to do that (afaik). It can be done however by using reflection:

private MemoryStream FromMailMessageToMemoryStream(MailMessage message)
{
   Assembly assembly = typeof(SmtpClient).Assembly;

   Type mailWriterType = assembly.GetType("System.Net.Mail.MailWriter");

   MemoryStream stream = new MemoryStream();

   ConstructorInfo mailWriterContructor = 
      mailWriterType.GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, new[] { typeof(Stream) }, null);
        object mailWriter = mailWriterContructor.Invoke(new object[] { stream });

   MethodInfo sendMethod = 
      typeof(MailMessage).GetMethod("Send", BindingFlags.Instance | BindingFlags.NonPublic);

   if (sendMethod.GetParameters().Length == 3)
   {
      sendMethod.Invoke(message, BindingFlags.Instance | BindingFlags.NonPublic, null, new[] { mailWriter, true, true }, null); // .NET 4.x
   }
   else
   {
      sendMethod.Invoke(message, BindingFlags.Instance | BindingFlags.NonPublic, null, new[] { mailWriter, true }, null); // .NET < 4.0 
   }

   MethodInfo closeMethod = 
      mailWriter.GetType().GetMethod("Close", BindingFlags.Instance | BindingFlags.NonPublic);
   closeMethod.Invoke(mailWriter, BindingFlags.Instance | BindingFlags.NonPublic, null, new object[] { }, null);

    return stream;
}

使用此帮助函数，您的代码将是现在：

With this helper function your code would be now:

protected void Page_Load(object sender, EventArgs e)
    {
        var message = (MailMessage)MyMailMessage();
        var stream = FromMailMessageToMemoryStream(message);
        List<string> bccTo = new List<string>();
        bccTo.Add("[e-mail]");
        using (AmazonSimpleEmailServiceClient client = new AmazonSimpleEmailServiceClient("awsAccessKeyId", "awsSecretAccessKey", RegionEndpoint.USWest2))
        {
            var sendRequest = new SendRawEmailRequest { RawMessage = new RawMessage { Data = stream } };
            var response = client.SendRawEmail(sendRequest);
            Console.WriteLine(response.MessageId);

            if (bccTo != null && bccTo.Count > 0)
            {
                sendRequest.Destinations = bccTo;
                response = client.SendRawEmail(sendRequest);
                Console.WriteLine(response.MessageId);
            }
        }
    }

private static MailMessage MyMailMessage()
    {
        var message = new MailMessage();
        message.From = new MailAddress("[e-mail]", "rahul");
        message.To.Add("[e-mail]");
        message.Subject = "Hello";
        message.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(@"<p>Thank you for submitting your query/complaint.", new ContentType("text/html")));
        //
        string attachmentname = "IntelOCL.log";
        Stream ms = new MemoryStream(File.ReadAllBytes(System.Web.HttpContext.Current.Server.MapPath(Path.GetFileName(attachmentname))));
        ContentType ct = new ContentType();
        ct.MediaType = "" // TODO
        Attachment attachment = new Attachment(ms, ct);
        attachment.Name = attachmentname;
        attachment.ContentDisposition.FileName = attachmentname;
        message.Attachments.Add(attachment);

        return message;
    }

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