求助：如何在Protractor中用TypeScript发带附件邮件？SMTP实现报错

Hey there! Let's work through your issue with sending emails with attachments using Protractor and TypeScript. Since you didn't share the exact error message or your code snippets, I'll break down the most common problems and their fixes that typically resolve this kind of scenario.

1. Incorrect File Path Resolution #

Node.js (and by extension, TypeScript) often struggles with relative file paths, especially when your compiled code lives in a dist folder separate from your source files. Always use path.resolve() to generate an absolute path to your attachment instead of hardcoding relative paths.

Example fix:

import * as path from 'path';
import * as nodemailer from 'nodemailer';

// Resolve the absolute path to your attachment
const attachmentPath = path.resolve(__dirname, '../reports/test-report.pdf');

// Set up your SMTP transporter
const transporter = nodemailer.createTransport({
  host: 'smtp.your-provider.com',
  port: 587,
  secure: false, // Use true for port 465
  auth: {
    user: 'your-email@example.com',
    pass: 'your-account-password' // Use app-specific password if 2FA is enabled
  }
});

// Mail options with properly resolved attachment path
const mailOptions = {
  from: 'your-email@example.com',
  to: 'recipient@example.com',
  subject: 'Automated Test Report',
  text: 'Please find the attached test results below.',
  attachments: [
    {
      filename: 'test-report.pdf',
      path: attachmentPath,
      contentType: 'application/pdf' // Specify correct MIME type
    }
  ]
};

2. SMTP Service Permissions & Configuration #

Most email providers (Gmail, Outlook, etc.) have strict security settings that can block SMTP requests:

• Gmail: If you have 2FA enabled, use an App Password instead of your regular account password. If not, enable "Less secure app access" (note: this is less recommended for production).
• Other providers: Verify the correct SMTP host, port, and SSL/TLS settings (e.g., Outlook uses smtp.office365.com on port 587 with secure: false).
• Corporate networks: Check if your company's firewall or proxy is blocking SMTP ports (common ports are 587 for TLS, 465 for SSL).

3. TypeScript Compilation & Type Definitions #

Ensure your TypeScript setup is compatible with Node.js modules:

• Add the correct types for nodemailer:

  npm install @types/nodemailer --save-dev
  

• Update your tsconfig.json to support Node.js modules:

  {
    "compilerOptions": {
      "module": "commonjs",
      "target": "ES6",
      "esModuleInterop": true,
      "outDir": "./dist",
      "resolveJsonModule": true
    },
    "include": ["src/**/*"]
  }
  

4. Handling Async Code in Protractor #

Protractor uses a control flow, so you need to properly handle the async sendMail function with async/await to avoid race conditions:

// Wrap the email send logic in an async function
async function sendTestReportEmail() {
  try {
    await transporter.sendMail(mailOptions);
    console.log('Email sent successfully!');
  } catch (error) {
    console.error('Failed to send email:', error);
  }
}

// Call the function in your test
it('should send test report with attachment', async () => {
  // Your test logic here...
  await sendTestReportEmail();
});

5. Missing or Corrupted Attachment File #

Add a quick check to ensure the attachment file exists before trying to send it:

import * as fs from 'fs';

if (!fs.existsSync(attachmentPath)) {
  console.error(`Error: Attachment file not found at ${attachmentPath}`);
  return; // Exit early to avoid sending an email without the attachment
}

If you can share the exact error message (e.g., "File not found", "SMTP authentication failed") and a snippet of your code, I can provide a more targeted solution!

内容的提问来源于stack exchange，提问作者Priyadarsini Muthuvel