如何创建Gmail API消息

I'd like to send a Message using Google's Gmail API. I've authenticated successfully, and am trying to use GmailService to send a message.

我想用谷歌的Gmail API发送一条消息。我已经验证成功，并且正在尝试使用GmailService发送消息。

I'd like to use this:

我想用这个:

myService.Users.Messages.Send(myMessage, "me").Execute();

where myService is a Google.Apis.Gmail.v1.GmailService and myMessage is a Google.Apis.Gmail.v1.Data.Message.

myService是google。api。gmail1。GmailService和myMessage是google . api . gmail.v1 . data . message。

myService is fine, I've done the OAuth dance. I can get messages from my Inbox and all that. But I don't know how to construct myMessage. I have a standard .NET MailMessage, with human-readable Subject, Body, To, From etc.

我的服务很好，我跳过舞。我可以从我的收件箱里收到信息等等。但我不知道如何构建我的消息。我有一个标准的。net邮件消息，包含人类可读的主题、正文、To、From等。

But the Google Message class takes fields Payload or Raw. What's the easiest way to convert a full MailMessage to a string which I can set to the Payload or Raw properties? Or is this not what I should be doing at all?

但是谷歌消息类接受字段有效载荷或原始数据。将完整邮件消息转换为字符串的最简单方法是什么?我可以将字符串设置为有效负载或原始属性。或者这不是我应该做的吗?

The documentation for the Message class.

消息类的文档。

2 个解决方案

#1

I found a solution. Strangely, .NET doesn't seem to support this natively/easily. There's a nice nuget package though, called AE.Net.Mail, which can write an easy-to-create message object to a stream.

我找到了一个解决方案。奇怪的是，. net似乎并不能很容易地支持这一点。不过有一个不错的nuget包，叫做AE.Net。邮件，它可以将一个易于创建的消息对象写入流。

Here's the sample code that pointed me in that direction.

这是指向这个方向的示例代码。

Copy-and-pasted code as site seems to be down, and Google's cache might not last forever:

复制粘贴的代码作为网站似乎是下降的，谷歌的缓存可能不会永远持续:

using System.IO;
using System.Net.Mail;
using Google.Apis.Gmail.v1;
using Google.Apis.Gmail.v1.Data;

public class TestEmail {

  public void SendIt() {
    var msg = new AE.Net.Mail.MailMessage {
      Subject = "Your Subject",
      Body = "Hello, World, from Gmail API!",
      From = new MailAddress("[you]@gmail.com")
    };
    msg.To.Add(new MailAddress("yourbuddy@gmail.com"));
    msg.ReplyTo.Add(msg.From); // Bounces without this!!
    var msgStr = new StringWriter();
    msg.Save(msgStr);

    var gmail = new GmailService(Context.GoogleOAuthInitializer);
    var result = gmail.Users.Messages.Send(new Message {
      Raw = Base64UrlEncode(msgStr.ToString())
    }, "me").Execute();
    Console.WriteLine("Message ID {0} sent.", result.Id);
  }

  private static string Base64UrlEncode(string input) {
    var inputBytes = System.Text.Encoding.UTF8.GetBytes(input);
    // Special "url-safe" base64 encode.
    return Convert.ToBase64String(inputBytes)
      .Replace('+', '-')
      .Replace('/', '_')
      .Replace("=", "");
  }
}

#2

Here is an alternative version using using MimeKit.

这里有一个使用MimeKit的替代版本。

public void SendEmail(MyInternalSystemEmailMessage email)
{
    var mailMessage = new System.Net.Mail.MailMessage();
    mailMessage.From = new System.Net.Mail.MailAddress(email.FromAddress);
    mailMessage.To.Add(email.ToRecipients);
    mailMessage.ReplyToList.Add(email.FromAddress);
    mailMessage.Subject = email.Subject;
    mailMessage.Body = email.Body;
    mailMessage.IsBodyHtml = email.IsHtml;

    foreach (System.Net.Mail.Attachment attachment in email.Attachments)
    {
        mailMessage.Attachments.Add(attachment);
    }

    var mimeMessage = MimeKit.MimeMessage.CreateFromMailMessage(mailMessage);

    var gmailMessage = new Google.Apis.Gmail.v1.Data.Message {
        Raw = Encode(mimeMessage.ToString())
    };

    Google.Apis.Gmail.v1.UsersResource.MessagesResource.SendRequest request = service.Users.Messages.Send(gmailMessage, ServiceEmail);

    request.Execute();
}

public static string Encode(string text)
{
    byte[] bytes = System.Text.Encoding.UTF8.GetBytes(text);

    return System.Convert.ToBase64String(bytes)
        .Replace('+', '-')
        .Replace('/', '_')
        .Replace("=", "");
}

Note: If you are getting an email bounce issue, it is likely due to not setting the ReplyToList field. See: GMail API Emails Bouncing

注意:如果你收到邮件被退回的问题，很可能是因为没有设置回复列表字段。参见:GMail API邮件的跳转

#1