如何在现有React/JS的AWS SES邮件代码中添加CC邮箱？

现有代码用于给网站注册用户发送邮件，目前仅注册人能收到邮件，希望将support@mysite.com添加到每封邮件的CC中。请问现有代码是否支持该需求，是否需要大幅修改？

现有代码 #

import { UserModel } from '../user/model';
import { IMessageClient } from '../professional/types';
import { Professional } from '../professional/model';

const charset = 'UTF-8';

function sendSESEmail(
    recipient_email: string,
    subject: string,
    body: string,
    cb: (messageId: string, err?: Error) => void,
) {
    const aws = require('aws-sdk');
    aws.config.region = process.env.AWS_SES_REGION;
    const sender = process.env.AWS_SES_SENDER;
    const recipient = recipient_email;
    const ses = new aws.SES();

    const params = {
        Source: sender,
        Destination: {
            ToAddresses: [recipient],
        },
        Message: {
            Subject: {
                Data: subject,
                Charset: charset,
            },
            Body: {
                Html: {
                    Data: body,
                    Charset: charset,
                },
            },
        },
    };

    ses.sendEmail(params, (error: any, data: any) => {
        if (error) cb(undefined, error);
        else cb(data.messageId);
    });
}

export default function sendEmail(
    recipient: string,
    subject: string,
    body: string,
    cb: (err?: Error) => void,
) {
    sendSESEmail(recipient, subject, body, (_, err?) => {
        cb(err);
    });
}

现有代码完全支持该需求，不需要大幅修改，只需要利用AWS SES的Destination参数自带的CcAddresses字段即可实现，具体修改步骤如下：

1. 先定义固定的CC邮箱常量（方便后续维护），在代码开头添加：

const CC_EMAIL = 'support@mysite.com';

2. 修改sendSESEmail函数中的params.Destination对象，添加CcAddresses数组：

Destination: {
    ToAddresses: [recipient],
    CcAddresses: [CC_EMAIL] // 新增这一行
},

修改后的完整代码（关键部分已标注） #

import { UserModel } from '../user/model';
import { IMessageClient } from '../professional/types';
import { Professional } from '../professional/model';

const charset = 'UTF-8';
const CC_EMAIL = 'support@mysite.com'; // 新增：固定CC邮箱

function sendSESEmail(
    recipient_email: string,
    subject: string,
    body: string,
    cb: (messageId: string, err?: Error) => void,
) {
    const aws = require('aws-sdk');
    aws.config.region = process.env.AWS_SES_REGION;
    const sender = process.env.AWS_SES_SENDER;
    const recipient = recipient_email;
    const ses = new aws.SES();

    const params = {
        Source: sender,
        Destination: {
            ToAddresses: [recipient],
            CcAddresses: [CC_EMAIL] // 新增：添加CC收件人
        },
        Message: {
            Subject: {
                Data: subject,
                Charset: charset,
            },
            Body: {
                Html: {
                    Data: body,
                    Charset: charset,
                },
            },
        },
    };

    ses.sendEmail(params, (error: any, data: any) => {
        if (error) cb(undefined, error);
        else cb(data.messageId);
    });
}

export default function sendEmail(
    recipient: string,
    subject: string,
    body: string,
    cb: (err?: Error) => void,
) {
    sendSESEmail(recipient, subject, body, (_, err?) => {
        cb(err);
    });
}

如果后续需要动态设置CC（比如不同场景用不同CC邮箱），也可以给sendEmail和sendSESEmail函数新增一个可选的cc参数，不过当前固定CC的场景下，上面的修改足够简洁高效。

内容的提问来源于stack exchange，提问作者Greg