通过 Gmail API 发送回复电子邮件时重播中缺少线程

Question

我正在尝试重播电子邮件 hru gmail api，如下所述：https://developers.google.com/gmail/api/guides/sending

我成功重播到电子邮件，但我的目标是像通过 gmail UI 那样重播原始电子邮件线程。 它正在重播，甚至将电子邮件主题更改为带有“Re：”前缀，但由于某种原因，它没有线程化原始电子邮件。 任何帮助表示赞赏。

Google 文档是这样说的：

如果您尝试发送回复并希望电子邮件被线程化，请确保：

1. 主题标题匹配

2. References 和 In-Reply-To 标头遵循 RFC 2822 标准。

我通过执行查询gmail.users.messages.get，从我正在重播的原始消息中获取了references、subject、inReplyTo和threadId变量。

我也尝试过创建草稿，但结果是相同的（草稿没有原始电子邮件线程内容）。

  public async send() {
    const from = '[email protected]';
    const to = '[email protected]';
    const subject = 'test 01';
    const text = 'bbbbbbbbbbb';
    const inReplyTo='<[e-mail]>';
    const references='<[e-mail]>';
    const threadId = '17c26a0c9045c813';

    const buildMessage = () => new Promise<string>((resolve, reject) => {
      const message  = new MailComposer({
          from: from,
          to: to,
          subject: subject,
          text: text,
          textEncoding: 'base64',
          headers: {
            'In-Reply-To': inReplyTo,
            'References': references,
          }
      })

      message.compile().build((err, msg) => {
        if (err) {
          reject(err)
        } 
      
        const encodedMessage = Buffer.from(msg)
          .toString('base64')
          .replace(/\+/g, '-')
          .replace(/\//g, '_')
          .replace(/=+$/, '')

        resolve(encodedMessage)
      })
  })

  const encodedMessage = await buildMessage()

    const auth = await this.authorize();
    const gmail = google.gmail({ version: 'v1', auth });
    return new Promise((resolve, reject) => {
      return gmail.users.messages.send(
        {
          userId: 'me',
          requestBody: {
            raw: encodedMessage,
            threadId: threadId
          }
        },
        (err: any, res: any) => {
          if (err) reject(err);
          resolve(res);
          const messages = res.data.messages;
          if (messages.length) {
            messages.forEach((message: { id: any; threadId: any; }) => {
              console.log(`${message.id}_${message.threadId}`);
            });
          } else {
            console.error('No messages found.');
          }
          
        }
      );
    });
  }

Answer 1

我找到了解决方案！

const threadId = originalMessage.threadId;

    const headers = originalMessage.payload.headers;
    const from = headers.find((header) => header.name === 'From').value;
    const to = headers.find((header) => header.name === 'To').value;
    const inReplyTo = headers.find(
        (header) => header.name === 'Message-ID'
    ).value;
    const subject = headers.find(
        (header) => header.name === 'Subject'
    ).value;

    const body = 'ALLLLLEZZZZ';

    // eslint-disable-next-line no-undef
    const utf8Subject = `=?utf-8?B?${Buffer.from(subject).toString(
        'base64'
    )}?=`;
    const messageParts = [
        'From: ' + to,
        'To: ' + from,
        'In-Reply-To: ' + inReplyTo,
        'References: ' + inReplyTo,
        'Content-Type: text/html; charset=utf-8',
        'MIME-Version: 1.0',
        'Subject: ' + utf8Subject,
        '',
        '' + body,
    ];

    // on join tous ces bouts de phrases
    const message = messageParts.join('\r\n');

    // The body needs to be base64url encoded.
    // eslint-disable-next-line no-undef
    const encodedMessage = Buffer.from(message)
        .toString('base64')
        .replace(/\+/g, '-')
        .replace(/\//g, '_')
        .replace(/=+$/, '');

    const res = await m.gmail.users.messages.send({
        userId: 'me',
        requestBody: {
            raw: encodedMessage,
            threadId: threadId,
        },
    });
    console.log('Message send');
    console.log(res.data);