附件不起作用的Node.js Gmail API草稿

const fs = require('fs');
const { google } = require('googleapis');

// 读取附件文件
const attachmentFile = fs.readFileSync('path/to/attachment.pdf');

// 创建Gmail API客户端
const gmail = google.gmail({ version: 'v1', auth: 'YOUR_AUTH_CLIENT' });

// 创建草稿邮件
gmail.users.drafts.create({
  userId: 'me',
  requestBody: {
    message: {
      raw: 'base64 encoded email content',
      payload: {
        mimeType: 'multipart/mixed',
        headers: [
          { name: 'To', value: 'recipient@example.com' },
          { name: 'Subject', value: 'Test Email with Attachment' },
        ],
        parts: [
          {
            mimeType: 'text/plain',
            body: { data: 'Hello, this is the email body.' },
          },
          {
            mimeType: 'application/pdf',
            body: { data: attachmentFile.toString('base64') },
            filename: 'attachment.pdf',
          },
        ],
      },
    },
  },
}, (err, res) => {
  if (err) {
    console.error('Error creating draft:', err);
    return;
  }
  console.log('Draft created:', res.data);
});