如何在Node Aws-sdk sendRawEmail函数中发送PDF附件? [英] How can send PDF attachment in `Node aws-sdk` sendRawEmail function?

问题描述

我想使用sendRawEmail(Node:aws-sdk)函数发送附件中的PDF文件，我尝试了很多方法，电子邮件发送成功，但是PDF变得简单了. 请更正我的代码并帮助解决它.

I want to send PDF file in attachment using sendRawEmail(Node: aws-sdk) function, I have tried lots of ways, email sends successfully but PDF goes plain. Please correct my code and help to solve it.

代码在这里:

try {
    data = fs.readFileSync('files/demo-invoice-new.pdf', 'utf8');

    console.log(data.toString());

    var ses_mail = "From: 'AWS SES Attchament Configuration' <" + SOURCE_EMAIL + ">\n";
    ses_mail = ses_mail + "To: " + toEmail + "\n";
    ses_mail = ses_mail + "Subject: AWS SES Attachment Example\n";
    ses_mail = ses_mail + "MIME-Version: 1.0\n";
    ses_mail = ses_mail + "Content-Type: multipart/mixed; boundary=\"NextPart\"\n\n";
    ses_mail = ses_mail + "--NextPart\n";
    ses_mail = ses_mail + "Content-Type: text/html; charset=us-ascii\n\n";
    ses_mail = ses_mail + "This is the body of the email.\n\n";
    ses_mail = ses_mail + "--NextPart\n";
    ses_mail = ses_mail + "Content-Type: application/octet;\n";
    ses_mail = ses_mail + "Content-Disposition: attachment; filename=\"demo-invoice-new.pdf\"\n\n";
    ses_mail = ses_mail + data.toString('utf8') + "\n\n";
    ses_mail = ses_mail + "--NextPart--";

    var params = {
        RawMessage: { Data: new Buffer(ses_mail) },
        Destinations: [toEmail],
        Source: "'AWS SES Attchament Configuration' <" + SOURCE_EMAIL + ">'"
    };

    console.log(params);

    var sendPromise = new AWS.SES(AWS_SES_CONFIG).sendRawEmail(params).promise();

    return sendPromise.then(
        data => {
            console.log(data);
            return data;
        }).catch(
        err => {
            console.error(err.message);
            throw err;
        });
} catch (e) {
    console.log('Error:', e.stack);
}

推荐答案

SES原始消息

SES raw messages must be base64-encoded. So, you'll need to get the file content as buffer and encode it as base64 string attachment. Also, you don't need to create a new buffer for raw message data since it already accepts a string data type.

可选:由于您已经在原始消息数据中提供了To字段，因此您也可以省略Destinations参数. (您还可以提供Cc和Bcc字段)

OPTIONAL: You can also omit the Destinations parameter since you're already providing the To field in the raw message data. (You can also provide the Cc and Bcc fields as well)

您可以尝试以下操作:

data = fs.readFileSync("files/demo-invoice-new.pdf");

var ses_mail = "From: 'AWS SES Attchament Configuration' <" + SOURCE_EMAIL + ">\n";
ses_mail += "To: " + toEmail + "\n";
ses_mail += "Subject: AWS SES Attachment Example\n";
ses_mail += "MIME-Version: 1.0\n";
ses_mail += "Content-Type: multipart/mixed; boundary=\"NextPart\"\n\n";
ses_mail += "--NextPart\n";
ses_mail += "Content-Type: text/html\n\n";
ses_mail += "This is the body of the email.\n\n";
ses_mail += "--NextPart\n";
ses_mail += "Content-Type: application/octet-stream; name=\"demo-invoice-new.pdf\"\n";
ses_mail += "Content-Transfer-Encoding: base64\n";
ses_mail += "Content-Disposition: attachment\n\n";
ses_mail += data.toString("base64").replace(/([^\0]{76})/g, "$1\n") + "\n\n";
ses_mail += "--NextPart--";

var params = {
    RawMessage: {Data: ses_mail},
    Source: "'AWS SES Attchament Configuration' <" + SOURCE_EMAIL + ">'"
};

注意:/([^\0]{76})/正则表达式替换会破坏您的长行，以确保邮件服务器不会抱怨带有编码附件的邮件行太长，这可能会导致短暂反弹. (请参见 RFC 5321 )

NOTE: The /([^\0]{76})/ regular expression replacement breaks your long lines to make sure that mail servers do not complain about message lines being too long when there is an encoded attachment, which might result in a transient bounce. (See RFC 5321)

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