使用 NodeJS 回复电子邮件线程的 GMail API

Question

亲爱的大家：我相信你们中的许多人在阅读完所有示例和参考资料后已经多次讨论过上述主题，我已经设法编写代码来回复相同的电子邮件 ThreadID。但不幸的是，当我回复相同的 ThreadID 电子邮件时，它会作为新电子邮件发送。我附上了完整的 NodeJS 代码，帮助我查看并告诉我应该在哪里进行更改。

const {google} = require('googleapis');
const mailComposer = require('nodemailer/lib/mail-composer');
var program_name = process.argv[0]; //value will be "node"
var script_path = process.argv[1]; //value will be "yourscript.js"
var Sender_Email = process.argv[2]; //value will be "Sender Email"
var Receiver_Email = process.argv[3]; //value will be "Email To"
//var CC_Email = process.argv[4]; //value will be "Email Cc"
var Email_Subject = process.argv[4]; //value will be "Email Subject"
var Email_Template = process.argv[5]; //value will be "Email Template"
var ThreadID = process.argv[6]; //Path to attach the file
var Dec_Message_ID = process.argv[7]; //Encoded messageid
var FileAttachment = process.argv[8]; //Path to attach the file
var dateFormat = require('dateformat');
var day=dateFormat(new Date(), "mmm dd, yyyy HH:MM tt");
class CreateMail{

    constructor(auth, to, cc, sub, body, task, attachmentSrc = [FileAttachment]){

        this.me = Sender_Email;
        this.task = task;
        this.auth = auth;
        this.to = Receiver_Email;
        //this.cc = CC_Email;
        this.sub = Email_Subject;       
        var fs = require('fs');
        this.body = fs.readFileSync(Email_Template,{encoding:'utf-8'});     
        
        this.gmail = google.gmail({version: 'v1', auth});
        this.attachment = attachmentSrc;
    }

    //Creates the mail body and encodes it to base64 format.
    makeBody(){
        if(this.attachment.length>0){
        var arr = [];
        for(var i=0;i<this.attachment.length;i++){
            arr[i] = {
                path: this.attachment[i],
                encoding: 'base64'
            }
        }
        }
        let mail;
        //Mail Body is created.
        if(this.attachment.length>0){
            mail = new mailComposer({
                
                from: "Arthanareeswaran Chandrasekaran <arthaaadhi@visha.page>",                            
                //sender: this.me,
                to: this.to,                
                //cc: this.cc,
                replyTo: this.to,
                
                inReplyTo: "<CAO29sXBTxmE8M=xyTkdFfsrxB_Mdr5e6N6vXiijwTY9rn1kzpQ@mail.gmail.com>",
                references: "<CAF7UyHwMrUvy-ZLNyRfjDmX876EKi5T-oc8E_tXy2PwO19dZ_Q@mail.gmail.com> <CAO29sXBH_B0yG4G2p6tdW1uk_tq9qFXmc01CPO5HJopkvMbU4Q@mail.gmail.com> <CAO29sXCcHv4LQSumjht_5zHEYvSzjfYkGr+yCEHfjwnqRvt0=Q@mail.gmail.com> <CAO29sXCPAxzWG0dC-TKEi4cR3xM8hbHhSJQ0ZAhbXBjsp503oA@mail.gmail.com> <CAO29sXA2mpqx6qbEeB5ke_6kUTrwXsqMD8ku0Aq3E_R07YzCLg@mail.gmail.com> <CAO29sXBTxmE8M=xyTkdFfsrxB_Mdr5e6N6vXiijwTY9rn1kzpQ@mail.gmail.com>",
                
                            
                subject: this.sub,  
                html: this.body,
                
                textEncoding: "base64",
                attachments: arr
                
            }); 
        }
        else{
            mail = new mailComposer({
                
                to: this.to,                
                cc: this.cc,
                html: this.body,
                subject: this.sub,              
                textEncoding: "base64"              
                
            });
        }
        
        //Compiles and encodes the mail.
        mail.compile().build((err, msg) => {
            if (err){
                return console.log('Error compiling email ' + error);
            } 
        
            const encodedMessage = Buffer.from(msg)
              .toString('base64')             
              .replace(/\+/g, '-')
              .replace(/\//g, '_')            
              .replace(/=+$/, '');
            
            if(this.task === 'mail'){
                this.sendMail(encodedMessage);
            }
            else{
                this.saveDraft(encodedMessage);
            }
        });
    }

    //Send the message to specified receiver.
        sendMail(encodedMessage){
        this.gmail.users.messages.send({
            userId: this.me,
            resource: {
                                                                                
                raw: encodedMessage,                                
                threadId: ThreadID

            }

        }, (err, result) => {
            if(err){
                return console.log('GMail API - The API returned an error: ' + err);
            }

            console.log("GMail API Sending Email Reply from server:", result.data);
        });
        }

    //Saves the draft.
        saveDraft(encodedMessage){
        this.gmail.users.drafts.create({
            'userId': this.me,
            'resource': {
              'message': {
                'raw': encodedMessage,
                threadId: ThreadID
              }
            }
        })
        }

    //Deletes the draft.
        deleteDraft(id){
        this.attachment.gmail.users.drafts.delete({
            id: id,
            userId: this.me
        });
        }

        }

module.exports = CreateMail;

感谢您的帮助...

Answer 1

我建议您将代码更新为此并检查 References、In-Reply-To 和 Subjects 标头是否匹配：

function replyToMessage(auth) {
    const gmail = google.gmail({
        version: 'v1',
        auth
    });
    const messages = [
        'From: NAME <email@email.com>',
        'To: NAME <email@email.com>',
        'References: <REFERENCE1> <REFERENCE2>',
        'In-Reply-To: <IN_REPLY_TO>',
        'Content-Type: text/html; charset=utf-8',
        'MIME-Version: 1.0',
        'Subject: Re: SUBJECT',
        '',
        'BODY_OF_THE_REPLY',
        '',
    ];
    const message = messages.join('\n');
    const encodedMessage = Buffer.from(message)
        .toString('base64')
        .replace(/\+/g, '-')
        .replace(/\//g, '_')
        .replace(/=+$/, '');
    gmail.users.messages.send({
        auth: auth,
        userId: 'me',
        resource: {
            raw: encodedMessage,
            threadId: 'THREAD_ID'
        }
    });
}

另外请注意，要查看相应的回复，您必须从 Gmail 设置中打开对话视图。

根据documentation：

您可以选择是否在对话中对电子邮件的回复进行分组，或者是否将每封电子邮件单独显示在您的收件箱中。

因此，如果未启用此设置，电子邮件将单独显示在您的收件箱中。

参考

• Gmail Help。