Question

我正尝试使用Nodemailer通过电子邮件发送流数据，但是由于某些原因，当我下载附件并查看其信息时，附件以0 kb的形式出现。如何正确发送流及其数据作为附件？流中应包含PKPass，将响应作为附件发送是更好的选择吗？我正在使用passkit-generator生成PKPass

const stream = examplePass.generate();

res.set({
    'Content-Type': 'application/vnd.apple.pkpass',
    'Content-disposition': `attachment; filename=${passName}.pkpass`,
});

stream.pipe(res);

//Send the receipt email

stream.on('finish', (attach) => {

    let transporter = nodemailer.createTransport({
        host: 'smtp.gmail.com',
        port: 587,
        secure: false,
        requireTLS: true,
        auth: {
            user: 'email4@gmail.com',
            pass: 'password',
        },
    });

    let mailOptions = {
        from: 'email4@gmail.com',
        to: 'emailTo1@gmail.com',
        subject: 'You\'re on your way to ',
        html: '<h1>Reciept email</h1>',
        attachments: [
            {
                filename: 'Event.pkpass',
                contentType: 'application/vnd.apple.pkpass',
                content: stream,
            },
        ],
    };

    transporter.sendMail(mailOptions, (error, info) => {
        if (error) {
            return console.log(error.message);
        }
        console.log('success ' + info);
    });

});

Answer 1

在这种情况下，似乎发送文件的唯一方法是读取整个流并将其作为字符串或缓冲区发送：

const stream = examplePass.generate();

res.set({
    'Content-Type': 'application/vnd.apple.pkpass',
    'Content-disposition': `attachment; filename=${passName}.pkpass`,
});

stream.pipe(res);

const chunks = [];

stream.on('data', chunk => {
    chunks.push(chunk);
});

stream.on('end', () => {
    const content = Buffer.concat(chunks);

    const transporter = nodemailer.createTransport({
        host: 'smtp.gmail.com',
        port: 587,
        secure: false,
        requireTLS: true,
        auth: {
            user: 'email4@gmail.com',
            pass: 'password',
        },
    });

    const mailOptions = {
        from: 'email4@gmail.com',
        to: 'emailTo1@gmail.com',
        subject: 'You\'re on your way to ',
        html: '<h1>Reciept email</h1>',
        attachments: [
            {
                filename: 'Event.pkpass',
                contentType: 'application/vnd.apple.pkpass',
                content
            },
        ],
    };

    transporter.sendMail(mailOptions, (error, info) => {
        if (error) {
            return console.log(error.message);
        }
        console.log('success:', info);
    });

});

但是！如果文件很大，因为它已完全加载到RAM中，则需要谨慎使用此方法。

Answer 2

您的问题是您将流通过管道传输到{Streamser“又名“ {Reader”）消费者res，而您只需要将其传递给本身就是StreamReader的nodeMailer。

const stream = examplePass.generate();

// res.set({
//   'Content-Type': 'application/vnd.apple.pkpass',
//   'Content-disposition': `attachment; filename=${passName}.pkpass`,
// });

// stream.pipe(res); <- remove this

//Send the receipt email

stream.on('finish', (attach) => {
  let transporter = nodemailer.createTransport({
    host: 'smtp.gmail.com',
    port: 587,
    secure: false,
    requireTLS: true,
    auth: {
      user: 'email4@gmail.com',
      pass: 'password',
    },
  });

  let mailOptions = {
    from: 'email4@gmail.com',
    to: 'emailTo1@gmail.com',
    subject: "You're on your way to ",
    html: '<h1>Reciept email</h1>',
    attachments: [
      {
        filename: 'Event.pkpass',
        contentType: 'application/vnd.apple.pkpass',
        content: stream,
      },
    ],
  };

  transporter.sendMail(mailOptions, (error, info) => {
    if (error) {
      return console.log(error.message);
    }
    console.log('success ' + info);
  });
});

这就是我发送电子邮件附件的方式。

Answer 3

嗨，我有这个问题吗？ `file：///home/racal/JavaScript/Node/Web-Env/webpack.config.dev.js：10 path.resolve（__ dirname，'src / index'） ^

ReferenceError: __dirname is not defined
at file:///home/racal/JavaScript/Node/Web-Env/webpack.config.dev.js:10:18
at ModuleJob.run (internal/modules/esm/module_job.js:138:23)
at async Loader.import (internal/modules/esm/loader.js:178:24)

`

Node.js通过电子邮件发送流

3 个答案: