使用Amazon-SES发送附件

时间：2011-07-19 06:32:53

标签： c# .net amazon-web-services amazon-ses

我正在搜索一个有效的C＃示例，用于向Amazon-SES发送附件。

在阅读Amazon-SES现在支持发送附件后，我正在搜索C＃示例，但无法找到。

7 个答案:

答案 0 :(得分：17)

我认为使用AWS SDK for .NET和MimeKit是非常简单和干净的解决方案。您可以通过SES API（而不是SMTP）发送带附件的电子邮件。

您可以直接将MimeMessage写入MemoryStream，然后将其与SES SendRawEmail一起使用：

using Amazon.SimpleEmail;
using Amazon.SimpleEmail.Model;
using Amazon;
using Amazon.Runtime;
using MimeKit;

private static BodyBuilder GetMessageBody()
{
    var body = new BodyBuilder()
    {
        HtmlBody = @"<p>Amazon SES Test body</p>",
        TextBody = "Amazon SES Test body",
    };
    body.Attachments.Add(@"c:\attachment.txt");
    return body;
}

private static MimeMessage GetMessage()
{
    var message = new MimeMessage();
    message.From.Add(new MailboxAddress("Foo Bar", "foo@bar.com"));
    message.To.Add(new MailboxAddress(string.Empty, "foobar@example.com"));
    message.Subject = "Amazon SES Test";
    message.Body = GetMessageBody().ToMessageBody();
    return message;
}

private static MemoryStream GetMessageStream()
{
    var stream = new MemoryStream();
    GetMessage().WriteTo(stream);
    return stream;
}

private void SendEmails()
{
    var credentals = new BasicAWSCredentials("<aws-access-key>", "<aws-secret-key>");

    using (var client = new AmazonSimpleEmailServiceClient(credentals, RegionEndpoint.EUWest1))
    {
        var sendRequest = new SendRawEmailRequest { RawMessage = new RawMessage(GetMessageStream()) };
        try
        {
            var response = client.SendRawEmail(sendRequest);
            Console.WriteLine("The email was sent successfully.");
        }
        catch (Exception e)
        {
            Console.WriteLine("The email was not sent.");
            Console.WriteLine("Error message: " + e.Message);
        }
    }
}

答案 1 :(得分：8)

public Boolean SendRawEmail(String from, String to, String cc, String Subject, String text, String html, String replyTo, string attachPath)
    {
        AlternateView plainView = AlternateView.CreateAlternateViewFromString(text, Encoding.UTF8, "text/plain");
        AlternateView htmlView = AlternateView.CreateAlternateViewFromString(html, Encoding.UTF8, "text/html");

        MailMessage mailMessage = new MailMessage();

        mailMessage.From = new MailAddress(from);

        List<String> toAddresses = to.Replace(", ", ",").Split(',').ToList();

        foreach (String toAddress in toAddresses)
        {
            mailMessage.To.Add(new MailAddress(toAddress));
        }

        List<String> ccAddresses = cc.Replace(", ", ",").Split(',').Where(y => y != "").ToList();

        foreach (String ccAddress in ccAddresses)
        {
            mailMessage.CC.Add(new MailAddress(ccAddress));
        }

        mailMessage.Subject = Subject;
        mailMessage.SubjectEncoding = Encoding.UTF8;

        if (replyTo != null)
        {
            mailMessage.ReplyToList.Add(new MailAddress(replyTo));
        }

        if (text != null)
        {
            mailMessage.AlternateViews.Add(plainView);
        }

        if (html != null)
        {
            mailMessage.AlternateViews.Add(htmlView);
        }

        if (attachPath.Trim() != "")
        {
            if (System.IO.File.Exists(attachPath))
            {
                System.Net.Mail.Attachment objAttach = new System.Net.Mail.Attachment(attachPath);
                objAttach.ContentType = new ContentType("application/octet-stream"); 
                System.Net.Mime.ContentDisposition disposition = objAttach.ContentDisposition;
                disposition.DispositionType = "attachment";
                disposition.CreationDate = System.IO.File.GetCreationTime(attachPath);
                disposition.ModificationDate = System.IO.File.GetLastWriteTime(attachPath);
                disposition.ReadDate = System.IO.File.GetLastAccessTime(attachPath);
                mailMessage.Attachments.Add(objAttach);
            }
        }

        RawMessage rawMessage = new RawMessage();

        using (MemoryStream memoryStream = ConvertMailMessageToMemoryStream(mailMessage))
        {
            rawMessage.WithData(memoryStream);
        }

        SendRawEmailRequest request = new SendRawEmailRequest();
        request.WithRawMessage(rawMessage);

        request.WithDestinations(toAddresses);
        request.WithSource(from);

        AmazonSimpleEmailService ses = AWSClientFactory.CreateAmazonSimpleEmailServiceClient(ConfigurationManager.AppSettings.Get("AccessKeyId"), ConfigurationManager.AppSettings.Get("SecretKeyId"));

        try
        {
            SendRawEmailResponse response = ses.SendRawEmail(request);
            SendRawEmailResult result = response.SendRawEmailResult;
            return true;
        }
        catch (AmazonSimpleEmailServiceException ex)
        {
            return false;
        }
    }
    public static MemoryStream ConvertMailMessageToMemoryStream(MailMessage message)
    {
        Assembly assembly = typeof(SmtpClient).Assembly;
        Type mailWriterType = assembly.GetType("System.Net.Mail.MailWriter");
        MemoryStream fileStream = new MemoryStream();
        ConstructorInfo mailWriterContructor = mailWriterType.GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, new[] { typeof(Stream) }, null);
        object mailWriter = mailWriterContructor.Invoke(new object[] { fileStream });
        MethodInfo sendMethod = typeof(MailMessage).GetMethod("Send", BindingFlags.Instance | BindingFlags.NonPublic);
        sendMethod.Invoke(message, BindingFlags.Instance | BindingFlags.NonPublic, null, new[] { mailWriter, true }, null);
        MethodInfo closeMethod = mailWriter.GetType().GetMethod("Close", BindingFlags.Instance | BindingFlags.NonPublic);
        closeMethod.Invoke(mailWriter, BindingFlags.Instance | BindingFlags.NonPublic, null, new object[] { }, null);
        return fileStream;
    }

找到here

更新：.NET 4.5中的方法签名已更改，这违反了上述内容： Getting System.Net.Mail.MailMessage as a MemoryStream in .NET 4.5 beta

答案 2 :(得分：1)

您也可以设置IIS SMTP以通过SES进行中继。

您需要安装stunnel和set it up

然后您可以设置IIS SMTP 智能主机和其他一些选项，它将通过SES转发您的电子邮件。

以上链接要点的说明：

从Amazon's docs获取的说明，并根据需要进行修改。

1。安装 stunnel ：

  • 从 stunnel的 download page
    • 下载
  • 使用默认选项运行安装程序，通过回答问题创建自签名证书
  • 在记事本中打开c:\program files (x86)\stunnel\stunnel.conf文件
  • 清除所有服务器配置（在Example SSL server mode services部分下，没有client = yes行）
  • 创建新的客户端配置：
  

[SMTP-TLS-包装纸]
  接受= 127.0.0.1:2525
  client =是
  connect = email-smtp.us-east-1.amazonaws.com:465

  • 启动stunnel.exe并确保未报告任何错误（您将获得一个小型系统托盘图标）
  • 如果成功，您可以选择通过在命令行运行stunnel.exe -install作为服务安装（注意这会安装服务但不启动它，所以启动它）
  • 在cmd行运行telnet localhost 2525测试连接，您应该看到来自Amazon服务器的SMTP响应（如果未安装telnet，请在服务器管理器/功能/添加功能中添加该功能）

2。配置IIS SMTP

  • 将智能主机设置为[127.0.0.1]（包括括号）
  • 在出站连接部分中，将传出端口设置为2525（如stunnel.conf文件）
  • 在出站安全部分中，将身份验证信息设置为您的Amazon SMTP凭据，将其设置为基本身份验证（注意：不要检查TLS复选框）

答案 3 :(得分：1)

这是一个使用MimeKit

的非常简单的实现 
using Amazon;
using Amazon.SimpleEmail;
using Amazon.SimpleEmail.Model;
using MimeKit;
using System.IO;

namespace SendEmailWithAttachments
{
 class Program
 {
    static void Main(string[] args)
    {
        //Remember to enter your (AWSAccessKeyID, AWSSecretAccessKey) if not using and IAM User with credentials assigned to your instance and your RegionEndpoint
        using (var client = new AmazonSimpleEmailServiceClient("YourAWSAccessKeyID", "YourAWSSecretAccessKey", RegionEndpoint.USEast1))
        using (var messageStream = new MemoryStream())
        {
            var message = new MimeMessage();
            var builder = new BodyBuilder() { TextBody = "Hello World" };

            message.From.Add(new MailboxAddress("FROMADDRESS@TEST.COM"));
            message.To.Add(new MailboxAddress("TOADDRESS@TEST.COM"));
            message.Subject = "Hello World";

            //I'm using the stream method, but you don't have to.
            using (FileStream stream = File.Open(@"Attachment1.pdf", FileMode.Open)) builder.Attachments.Add("Attachment1.pdf", stream);
            using (FileStream stream = File.Open(@"Attachment2.pdf", FileMode.Open)) builder.Attachments.Add("Attachment2.pdf", stream);

            message.Body = builder.ToMessageBody();
            message.WriteTo(messageStream);

            var request = new SendRawEmailRequest()
            {
                RawMessage = new RawMessage() { Data = messageStream }
            };

            client.SendRawEmail(request);
        }
    }
  }
}

我的存储库https://github.com/gianluis90/amazon-send-email

中有代码

答案 4 :(得分：0)

我不确定这是否是您正在寻找的，但它是我能够在这个主题上找到的唯一资源。我也希望能够更好地回答这个问题。

http://docs.amazonwebservices.com/ses/latest/DeveloperGuide/

它说明了如何使用它，但至少对我来说是非常神秘的。

有更好的指南吗？

答案 5 :(得分：0)

我也需要帮助，但到目前为止，我发现你需要发送一个多部分MIME消息，附件编码在base64中。

答案 6 :(得分：0)

我认为您需要按照this link上的说明操作。亚马逊不允许您添加附件或其他更复杂的消息类型（iCalendar事件）。基本上你需要通过字符串构建和操作来手工编写消息体。

目前我在遗留系统上为iCalendar格式的电子邮件执行此操作。这对屁股来说有点痛苦，但是如果你阅读RFC 2822，它会很清楚地告诉你格式是什么。特别需要注意的事项：

  • 数据的Base64编码
  • MIME类型
  • 确保您的多部分边界匹配（并且是唯一的）
  • 某些行后的换行符数量（\ n）的挑剔问题
祝你好运。我不知道是否有一个开放的库可以在C＃中为你做这类事情。如果你能找到一个然后尝试使用它，因为处理RFC的复杂性应该有一个增加血压和脱发的医疗通知。

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