问附件不起作用的Node.js Gmail API草稿
EN

Stack Overflow用户

提问于 2021-07-18 06:36:49

回答 1查看 90关注 0票数 1

我正在尝试使用Gmail API在Node.js中创建一个简单的带有PDF附件的草稿。草稿被创建并在Gmail中显示，但它没有附件。此外，当在Gmail中点击草稿时，它会打开一个没有标题或内容的空草稿。当我尝试使用几乎相同的代码发送电子邮件时，它工作得很好。

这是我的代码：

const createMailEncodedMessage = async (params) => {
    const msg = await buildMailBody(params)

    // The body needs to be base64url encoded.
    const encodedMessage = Buffer.from(msg)
        .toString('base64')
        .replace(/\+/g, '-')
        .replace(/\//g, '_')
        .replace(/=+$/, '')

    return encodedMessage
}

const sendEmail = async (params) => {
    if (!auth) {
        await init()
    }

    const encodedMessage = await createMailEncodedMessage(params)
    return await gmail.users.messages.send({
        userId: 'me',
        requestBody: {
            raw: encodedMessage,
        },
    })
}

const createDraft = async (params) => {
    if (!auth) {
        await init()
    }

    const encodedMessage = await createMailEncodedMessage(params)

    return await gmail.users.drafts.create({
        userId: 'me',
        requestBody: {
            message: {
                raw: encodedMessage,
            }
        }
    })
}

const buildMailBody = ({ from, to, subject, body, attachments }) => {
    return new Promise((resolve, reject) => {
        let mail = new MailComposer({
            from,
            to,
            //text: 'I hope this works',
            html: body,
            subject,
            textEncoding: 'base64',
            attachments: attachments?.map(a => ({
                filename: a.fileName,
                content: fs.createReadStream(a.filePath),
            })),
        })

        mail.compile().build((error, msg) => {
            if (error) {
                reject(error)
            }

            resolve(msg)
        })
    })
}

node.js

google-api

gmail-api

nodemailer

回答 1

Stack Overflow用户

发布于 2021-08-11 01:09:41

在回顾了这个问题之后，我开发了一个代码，您可以使用它来实现您的目标。此脚本将发送一封带有两个示例附件的users.messages.send电子邮件。我使用quickstart中描述的凭据流来管理令牌和作用域。请记住，您将需要一个方法来处理电子邮件MIME类型和base64转换。为了制作一个工作示例，我使用了MailComposer库来控制MIME类型。以下脚本应按原样工作，您只需设置凭据以使其运行(您可以使用快速入门中描述的步骤)：

const fs = require('fs');
const readline = require('readline');
const {
  google
} = require('googleapis');
const MailComposer = require('nodemailer/lib/mail-composer');
const SCOPES = ['https://mail.google.com/'];
const TOKEN_PATH = 'token.json';

fs.readFile('credentials.json', (err, content) => {
  if (err) return console.log('Error loading client secret file:', err);
  authorize(JSON.parse(content), sendEmailWithAttachments);
});

function authorize(credentials, callback) {
  const {
    client_secret,
    client_id,
    redirect_uris
  } = credentials.installed;
  const oAuth2Client = new google.auth.OAuth2(
    client_id, client_secret, redirect_uris[0]);

  fs.readFile(TOKEN_PATH, (err, token) => {
    if (err) return getNewToken(oAuth2Client, callback);
    oAuth2Client.setCredentials(JSON.parse(token));
    callback(oAuth2Client);
  });
}

function getNewToken(oAuth2Client, callback) {
  const authUrl = oAuth2Client.generateAuthUrl({
    access_type: 'offline',
    scope: SCOPES,
  });
  console.log('Authorize this app by visiting this url:', authUrl);
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
  });
  rl.question('Enter the code from that page here: ', (code) => {
    rl.close();
    oAuth2Client.getToken(code, (err, token) => {
      if (err) return console.error('Error retrieving access token',
        err);
      oAuth2Client.setCredentials(token);
      fs.writeFile(TOKEN_PATH, JSON.stringify(token), (err) => {
        if (err) return console.error(err);
        console.log('Token stored to', TOKEN_PATH);
      });
      callback(oAuth2Client);
    });
  });
}

function sendEmailWithAttachments(auth) {
  let mail = new MailComposer({
    to: "{ RECIPIENT EMAIL }",
    text: "Morbi imperdiet gravida leo in commodo.",
    html: "Morbi <i>imperdiet</i> gravida <b>leo</b> in commodo.",
    subject: "Donec et porttitor erat",
    textEncoding: "base64",
    attachments: [{
        filename: 'attachment1.txt',
        content: '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',
        encoding: 'base64'
      },
      {
        filename: 'attachment2.txt',
        content: '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',
        encoding: 'base64'
      },
    ]
  });
  
  mail.compile().build((error, msg) => {
    if (error) return console.log('ERROR - ' + error);
    const encodedMessage = Buffer.from(msg).toString('base64').replace(
      /\+/g, '-').replace(/\//g, '_').replace(/=+$/, '');
    const gmail = google.gmail({
      version: 'v1',
      auth
    });
    gmail.users.messages.send({
      userId: 'me',
      resource: {
        raw: encodedMessage,
      }
    }, (err, result) => {
      if (err) return console.log('ERROR: ' + err);
      console.log("Email sent: ", result.data);
    });
  })
}