如何在Swift 5中在AWS-SES上创建RAW-Email-Message [英] How to create RAW-Email-Message on AWS-SES in Swift 5

问题描述

我想在iOS应用程序中创建RAW电子邮件.查看文档，我需要将消息编码为MIME-Standard，但是我对该主题不太熟悉.在文档中，还有用于python和java的示例代码.

I want to create a RAW-Email inside my iOS-App. Looking to the documentation, I need to encode my message to MIME-Standard, but I'm not so familiar with this topic. In the documentation there is also example-code for python and java.

如何在SWIFT中实现这一目标?

How can I achieve this in SWIFT?

func sendRawMail(){
    let sender = "[e-mail]"
    let recipient = "[e-mail]"

    let rawMessage = AWSSESRawMessage()
   // rawMessage?.data = "I guess HERE I have to put the MIME-   Data?!"
    let rawRequest = AWSSESSendRawEmailRequest()
    rawRequest?.destinations = [recipient]
    rawRequest?.source = sender

    rawRequest?.rawMessage = rawMessage

    AWSSES.default().sendRawEmail(rawRequest!) { (response, error) in
        if let response = response{
            print(response)
        }
        if let error = error{
            print(error)
        }
    }
}

到目前为止，使用我的代码发送空邮件是可行的.

Sending an empty mail with my code works so far.

推荐答案

经过大量阅读，我终于使它工作了.您需要根据MIME标准写一个大字符串.您必须将此大字符串编码为BASE64.从数据到BASE64字符串的转换也需要附件.

After a lot of reading, I finally get it working. You need to write a big string, based on MIME-Standards. This big string you have to encode to BASE64. Attachments needed also to transform from data to an BASE64-String.

我将发布我的代码，该代码可以发送带有.png图像的邮件.我还将测试其他文件类型，但是必须具有相同的原理.

I will post my code, which can send Mails with an .png image. I will test other fileTypes as well, but it have to be the same principle.

首先，我为我的fileTypes创建了一个枚举.

First I created a enum for my fileTypes.

enum DataTypes{
case png
case jpg
case pdf
}

现在，我创建了一个函数来获取特定DataType的字符串值

Now I created a function to get the string-value for the specific DataType

func getMIMEDataType(dataType:DataTypes) -> String{
    var MIMEData = String()
    switch dataType {
    case .png:
        MIMEData = "image/png"
    case .jpg:
        MIMEData = "image/jpg"
    case .pdf:
        MIMEData = "application/pdf"
    }
    return MIMEData
}

最后是发送原始邮件的功能.消息字符串中已经有变量，因此您可以灵活地使用此函数.

Finally the function to send the raw-mail. There are already variables in the message-string so you can use this function flexible.

func sendRawMail(sender:String,reciepients:[String],subject:String,message:String,attachment:Data?,dataType:DataTypes?,attachmentName:String?,completion: @escaping (_ messageCode:String?,_ error:Error?) -> ()){

    let attachmentString = attachment!.base64EncodedString(options: .lineLength64Characters)

    let MIMEDataType = getMIMEDataType(dataType: dataType!)

    let message:String = """
    Subject: \(subject)
    MIME-Version: 1.0
    Content-Type: multipart/mixed;
            boundary="XXXXboundary text"

    This is a multipart message in MIME format.

    --XXXXboundary text
    Content-Type: text/plain

    \(message)

    --XXXXboundary text
    Content-Type: \(MIMEDataType);
    Content-Transfer-Encoding: base64
    Content-Disposition: attachment; filename="\(attachmentName!).\(MIMEDataType.components(separatedBy: "/")[1])"

    \(attachmentString)

    --XXXXboundary text--
    """

    let data = message.data(using: .utf8)
    let rawMessage = AWSSESRawMessage()
    rawMessage?.data = data
    let rawRequest = AWSSESSendRawEmailRequest()
    rawRequest?.destinations = reciepients
    rawRequest?.source = sender

    rawRequest?.rawMessage = rawMessage

    AWSSES.default().sendRawEmail(rawRequest!) { (response, error) in
        if let response = response{
            completion(response.messageId,nil)
        }
        if let error = error{
            completion(nil,error)
        }
    }
}

您可以像这样使用它，并可以在completionHandler中处理结果.

You can use it like this and can handle the result in the completionHandler.

sendRawMail(sender: "[e-mail]", reciepients: ["[e-mail]"], subject: "This is a test", message: "TestMessage", attachment: attachment.data, dataType: .png, attachmentName: "testpicture") { (messageID, error) in
                    if let messageID = messageID{
                        print(messageID)
                    }
                    if let error = error{
                        print(error)
                    }

我希望它将对以后的人们有所帮助:)

I hope it will help somebody in future :)

这篇关于如何在Swift 5中在AWS-SES上创建RAW-Email-Message的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！