使用 Nodemailer 和 Webpack 时无法解析 dns 和 child_process

Question

我正在尝试使用 nodemailer 发送一封简单的电子邮件，但遇到以下问题。似乎问题出在 webpack 上。我已经包含了错误和有问题的代码。谢谢！

控制台日志：

ERROR in ./~/nodemailer/lib/mailer/index.js
Module not found: Error: Can't resolve 'dns' in 
'/Users//Users/user/Projects/world-domination/project-folder/node_modules/nodemailer/lib/mailer'
@ ./~/nodemailer/lib/mailer/index.js 14:12-26
@ ./~/nodemailer/lib/nodemailer.js
@ ./src/app/components/contact/contact.component.ts
@ ./src/app/app.module.ts
@ ./src/main.ts
@ multi webpack-dev-server/client?http://localhost:4200 ./src/main.ts

ERROR in ./~/nodemailer/lib/sendmail-transport/index.js
Module not found: Error: Can't resolve 'child_process' in 
'/Users/user/Projects/world-domination/project-folder/node_modules/nodemailer/lib/sendmail-transport'
@ ./~/nodemailer/lib/sendmail-transport/index.js 3:14-38
@ ./~/nodemailer/lib/nodemailer.js
@ ./src/app/components/contact/contact.component.ts
@ ./src/app/app.module.ts
@ ./src/main.ts
@ multi webpack-dev-server/client?http://localhost:4200 ./src/main.ts

有问题的代码：

import { Component, OnInit } from '@angular/core';
import * as nodemailer from 'nodemailer';

@Component({
  selector: 'app-contact',
  templateUrl: './contact.component.html',
  styleUrls: ['./contact.component.scss']
})
export class ContactComponent implements OnInit {
    public sendMessage(): void {
        let transporter = nodemailer.createTransport({
          host: 'smtp.example.com',
          port: 465,
          secure: true,
          auth: {
            user: 'sampleAddress@gmail.com',
            pass: 'samplePassword'
         }
    });

    let mailOptions = {
        from: '"Mr. Sender" <sampleAddress@gmail.com>',
        to: 'sampleRecipient@gmail.com',
        subject: 'Test email subject',
        text: 'Test email body'
    };

    transporter.sendMail(mailOptions, (error, info) => {
      if (error) {
        return console.log(error);
      }
      console.log('Message %s sent: %s', info.messageId, info.response);
    })
  }
}

Answer 1

@Abdullah Adeeb 是正确的。我最终只使用 AWS-SES 并从前端调用它。

修复组件代码：

/// <reference types="aws-sdk" />
import { Component } from '@angular/core';
import * as aws from 'aws-sdk';
import { SES } from 'aws-sdk'
import { AwsConfig } from '../../../awsConfig';

@Component({
  selector: 'app-contact',
  templateUrl: './contact.component.html',
  styleUrls: ['./contact.component.scss']
})
export class ContactComponent {

  private _ses: SES;

  constructor() {
    this.configureSES();
  }

  public sendMessage(): void {
    let params;
      params = {
        Destination: {
          ToAddresses: [ 'recipient@sample.com' ]
        },
        Message: {
          Body: {
            Html: {
              Charset: 'UTF-8',
              Data: '<h1>HTML needed inside of your email</h1>'
            },
            Text: {
              Charset: 'UTF-8',
              Data: 'Or you can use plain text'
            }
          },
          Subject: {
            Charset: 'UTF-8',
            Data: 'Sample message subject'
          }
        },
        Source: 'sender@sample.com' // Must be registered with AWS
      };
      this.sendEmail(params);
    }
  }

  private configureSES(): void {
    aws.config.credentials = {
      accessKeyId: AwsConfig.accessKeyId,
      secretAccessKey: AwsConfig.secretAccessKey
    };
    aws.config.update({
      region: AwsConfig.region
    });
    this._ses = new SES({
      apiVersion: '2010-12-01'
    });
  }

  private sendEmail(params): void {
    this._ses.sendEmail(params, function(err, data) {
      if (err) {
        console.log(err, err.stack);
      } else {
        console.log(data);
      }
    });
  }
}

Answer 2

您根本不能在前端使用 nodemailer。 Nodemailer 和其他依赖它的项目（即 gmail-send）是为后端的 nodejs 使用而制作的。

相反，您应该考虑使用像 AWS-SES 这样的第 3 方 smtp 服务，或者通过在后端使用 nodemailer 来制作自己的服务，前端会通过 https 请求之类的方式调用它。