[ NestJS ] nodemailer로 메일 발송하기

 

NestJS 프레임워크에서 이메일 발송을 위한 nodemailer 라이브러리를 적용하는 방법입니다.

nodemailer 사용 방법

1. nodemailer 설치

npm install nodemailer

2. 환경변수 설정 (.env)

# /.env 
email_host = "smtp.gmail.com" 
email_port = "777" 
email_client_id = '1234-abcd.apps.googleusercontent.com' 
email_secret = '1q2w3e4r' 
email_user = 'noreply@‘test.io 
email_address_from = 'help@test.io’ 
email_refresh_token = 'aaa' 
email_access_token = 'bbb'

3. Mailer Service 생성 (service)

/** /src/email/mailer.service.ts 
*
*/

import { BadRequestException, Injectable } from '@nestjs/common';
import * as nodemailer from 'nodemailer';

@Injectable()
export class MailerService {
  private readonly transporter: nodemailer.Transporter;


  constructor() {
    this.transporter = nodemailer.createTransport({
      service: 'Gmail',
      secure: true,
      auth: {
        type: 'OAuth2',
        user: process.env.email_user,
        clientId: process.env.email_client_id,
        clientSecret: process.env.email_secret,
        refreshToken: process.env.email_refresh_token,
        accessToken: process.env.email_access_token,
      },
    });
  }

  async sendEmail(to: string, subject: string, html: string): Promise<void> {
    const sendSuccess = await this.transporter.sendMail({
      from: {
        name: 'letsee',
        address: process.env.email_address_from,
      },
      to,
      subject,
      html,
    });

    if (!sendSuccess) {
      throw new BadRequestException('send email error');
    }
  }
}

4. Mailer Service 사용 (controller)

/** /src/email/email.controller.ts 
*
*/ 

import { Controller, Post, Body } from '@nestjs/common';
import { MailerService } from './mailer.service';

@Controller('email')
export class EmailController {
  constructor(private readonly mailerService: MailerService) {}

  @Post('send')
  async sendEmail(
    @Body() data: { to: string; subject: string; html: string },
  ): Promise<string> {
    await this.mailerService.sendEmail(data.to, data.subject, data.html);
    return 'Email sent successfully';
  }
}