使用来自 node.js 的 AWS SES 在邮件中上传 .jpg 图像附件

Question

下面是来自 https://github.com/andrewpuch/aws-ses-node-js-examples 的代码，其中有一个发送和电子邮件附件的示例，

我修改了代码以从 aws s3 获取图像文件并将其作为附件作为邮件发送，当我为文本文件执行此操作时效果很好，但是当我发送图像时，在邮件中我无法看到图像，因为它已损坏。

当我尝试用 apple photo 应用程序打开时，它显示缺少元数据，我还在邮件的 header 中添加了 Content-Transfer-Encoding: base64，当我尝试使用 utf8 时， Content-Transfer-Encoding中的 utf-8 和 UTF-8 在 header 中我从 aws

得到了以下响应

{
  "message": "Unknown encoding: utf8",
  "code": "InvalidParameterValue",
  "time": "2017-03-14T08:42:43.571Z",
  "requestId": "2e220c33-0892-11e7-8a5a-1114bbc28c3e",
  "statusCode": 400,
  "retryable": false,
  "retryDelay": 29.798455792479217
}

我修改了代码以通过邮件发送图像附件，我什至尝试将缓冲区编码为 utf-8，base-64，在这上面浪费了足够的时间，不知道为什么它已损坏，如果有人这样做的话之前，帮帮我

// Require objects.
var express = require('express');
var app = express();
var aws = require('aws-sdk');

// Edit this with YOUR email address.
var email = "*******@gmail.com";

// Load your AWS credentials and try to instantiate the object.
aws.config.loadFromPath(__dirname + '/config.json');

// Instantiate SES.
var ses = new aws.SES();
var s3 = new aws.S3();

// Verify email addresses.
app.get('/verify', function (req, res) {
    var params = {
        EmailAddress: email
    };

    ses.verifyEmailAddress(params, function (err, data) {
        if (err) {
            res.send(err);
        }
        else {
            res.send(data);
        }
    });
});

// Listing the verified email addresses.
app.get('/list', function (req, res) {
    ses.listVerifiedEmailAddresses(function (err, data) {
        if (err) {
            res.send(err);
        }
        else {
            res.send(data);
        }
    });
});

// Deleting verified email addresses.
app.get('/delete', function (req, res) {
    var params = {
        EmailAddress: email
    };

    ses.deleteVerifiedEmailAddress(params, function (err, data) {
        if (err) {
            res.send(err);
        }
        else {
            res.send(data);
        }
    });
});

// Sending RAW email including an attachment.
app.get('/send', function (req, res) {
    var params = { Bucket: 's3mailattachments', Key: 'aadhar.jpg' };
    var attachmentData;
    s3.getObject(params, function (err, data) {
        if (err)
            console.log(err, err.stack); // an error occurred
        else {
            console.log(data.ContentLength);
            console.log(data.ContentType);
            console.log(data.Body);
            var ses_mail = "From: 'AWS Tutorial Series' <" + email + ">\n";
            ses_mail = ses_mail + "To: " + email + "\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: image/jpeg; \n";
            ses_mail = ses_mail + "Content-Disposition: attachment; filename=\"aadhar.jpg\"\n";
            ses_mail = ses_mail + "Content-Transfer-Encoding: base64\n\n"
            ses_mail = ses_mail + data.Body;
            ses_mail = ses_mail + "--NextPart";


            var params = {
                RawMessage: { Data: new Buffer(ses_mail) },
                Destinations: [email],
                Source: "'AWS Tutorial Series' <" + email + ">'"
            };

            ses.sendRawEmail(params, function (err, data) {
                if (err) {
                    res.send(err);
                }
                else {
                    res.send(data);
                }
            });

        }
    });
});

// Start server.
var server = app.listen(3003, function () {
    var host = server.address().address;
    var port = server.address().port;

    console.log('AWS SES example app listening at http://%s:%s', host, port);
});

Answer 1

首先，您的 MIME 邮件格式不正确。最后一行应该是 --NextPart-- 而不是 --NextPart.

您还应该使用 Buffer.from(data.Body).toString('base64') 将 data.Body 数组转换为其 base64 字符串表示形式，如下所示：

var ses_mail = "From: 'AWS Tutorial Series' <" + email + ">\n";
ses_mail += "To: " + email + "\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; charset=us-ascii\n\n";
ses_mail += "This is the body of the email.\n\n";
ses_mail += "--NextPart\n";
ses_mail += "Content-Type: image/jpeg; \n";
ses_mail += "Content-Disposition: attachment; filename=\"aadhar.jpg\"\n";
ses_mail += "Content-Transfer-Encoding: base64\n\n"
ses_mail += Buffer.from(data.Body).toString('base64');
ses_mail += "--NextPart--";

然后，您可以将 ses_mail 字符串作为原始消息数据传递为 RawMessage: { Data: ses_mail } 而不是 RawMessage: { Data: new Buffer(ses_mail) }。

Answer 2

解决这个问题的另一种方法是将您的 nodemailer MailOptions 参数（内联图像附件 cid:aadhar 和所有）传递给 nodemailer 作曲家，为您生成缓冲区数据，如下所示:

import MailComposer from 'nodemailer/lib/mail-composer';

new MailComposer( mailOptions )
    .compile()
    .build(( err, Data ) => {
        if( err !== null ) {
            process.stderr.write( err ); // for example
            return;
        }
        ses.sendRawEmail({
            RawMessage: {
                Data
            }
        });
    });

Ps：我正在使用笨拙的 callback 技术来尽量减少答案的复杂性。随意将构建调用包装在 promise 和 async/wait 您的缓冲区数据中，然后您可以将其单独传递给您的 ses.sendRawEmail 方法。

使用来自 node.js 的 AWS SES 在邮件中上传 .jpg 图像附件

upload .jpg image attachment in mail using AWS SES from node.js

amazon-s3

amazon-web-services

node.js

amazon-ses