Question

以下是来自https://github.com/andrewpuch/aws-ses-node-js-examples的代码，其中有一个示例要发送并附带附件，

我已修改代码以从aws s3获取图像文件并将其作为附件以邮件方式发送，当我为文本文件执行它时它完美地工作，但是当我发送图像时，我在邮件中因为它已损坏而无法看到图像。

当我尝试打开苹果照片应用程序时，它显示缺少元数据，我在邮件标题中添加了Content-Transfer-Encoding：base64，当我尝试使用utf8，utf-8和UTF-时标题中的 Content-Transfer-Encoding 中的8我从aws得到以下回复

{
  "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
}

我修改了用邮件发送图像附件的代码，我甚至尝试将缓冲区编码为utf-8，base-64，浪费了足够的时间，不知道它为什么会被破坏，如果有人之前已经这样做了，帮助我

// 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。最后一行应为--NextPart--，而不仅仅是--NextPart。

您还应该使用data.Body将new Buffer(data.Body).toString('base64')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 += new Buffer(data.Body).toString('base64');
ses_mail += "--NextPart--";

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

Answer 2

解决此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）传递到 nodemailer composer 中，为您生成一个缓冲区数据，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 技术来最小化答案的复杂性。随意将构建调用包装在一个 promise 中，并async/wait您的缓冲区数据，然后您可以将这些数据分别传递给您的 ses.sendRawEmail 方法。

使用来自node.js的AWS SES在邮件中上传.jpg图像附件

2 个答案: