Apps 脚本：将附件添加到邮件合并

Question

问题：

在@Cooper 的出色帮助下，我能够使用 html 模板（“emailEinladung.html”）和收件人列表（“terminBestaetige”）优化我的邮件合并脚本。每个收件人都会收到一封基于 html 模板的个性化电子邮件，只要他/她在第 11 列（因此，“K”）中的状态未设置为“EMAIL SENT”。现在我想为每封发送的电子邮件添加一个或多个附件。

尝试的解决方案：

function terminEinladungVersendenWithAttachments() {
  // variables to reference the sheet and its content
  const anrede = 2;
  const nachname = 3;
  const emailAdresse = 5;
  const terminTag = 6;
  const terminUhrzeit = 8;
  const terminURL = 9;
  let emailTemp = HtmlService.createTemplateFromFile('emailEinladung');
  const sh = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("terminBestaetigen");

  // variables for "Betreff" (in English: "subject") coming from the google Sheet named "Vorlagen"
  var wsVorlagen = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Vorlagen");
  var betreff = wsVorlagen.getRange("B1").getValue();

  const sr = 3;//start row of data
  const data = sh.getRange(sr, 1, sh.getLastRow() - sr + 1, 11).getValues();
  data.forEach((row, i) => {
    if (row[10] == "EMAIL NOT SENT YET") {
      emailTemp.anrede1 = (row[anrede]);
      emailTemp.nachname1 = (row[nachname]);
      emailTemp.emailAdresse1 = (row[emailAdresse]);
      emailTemp.terminTag1 = (row[terminTag]);
      emailTemp.terminUhrzeit1 = (row[terminUhrzeit]);
      emailTemp.terminURL1 = (row[terminURL]);
  // including attachements to each email being sent.
      var attachment1 = DriveApp.getFileById("[FILE_ID1]")
      var attachment2 = DriveApp.getFileById("[FILE_ID2]")
      var blob1 = attachment1.getBlob()
      var blob2 = attachment2.getBlob()
      var htmlMessage = emailTemp.evaluate().getContent();
      GmailApp.sendEmail(row[emailAdresse],
        betreff, "Dies ist eine Nachricht im HTML-Format. Sie müßen Ihre Email-Software entsprechend einrichten.",
        { htmlBody: htmlMessage, replyTo: "f.dore@skillgainer.de", attachments: [blob1, blob2]});
      sh.getRange(i + sr, 11).setValue("EMAIL SENT");//stops emails from being sent again
    }
  });
}

问题：

我的脚本有什么需要改进的地方吗？如果是，那将是什么改进？您的脚本会是什么样子？

非常感谢您的帮助。

Answer 1

我相信你的目标如下。

• 您希望降低脚本的处理成本。

修改点：

• 当我看到你的脚本时，我认为blob1 和blob2 可以排除在循环之外。我认为这样一来，流程成本可能会有点低。
• 但是，当GmailApp.sendEmail循环发送500封邮件时，这个过程成本会很高。我认为这个成本比上述的要大。
• 为了减少发送 500 封电子邮件的流程成本，在这个答案中，作为一种变通方法，我想建议使用 Gmail API 和批处理请求。但我不确定这是否是您问题的直接解决方案。所以请测试以下脚本。

修改后的脚本如下。

修改脚本：

在你使用这个脚本之前，请先安装a Google Apps Script library of BatchRequest。您可以在here 了解如何安装此库。

还有，please enable Gmail API at Advanced Google services。

请设置[FILE_ID1]和[FILE_ID2]的文件ID。

const convert_ = ({ to, subject, textBody, htmlBody, attachmentfile1, attachmentfile2 }) => {
  const boundary1 = "boundaryboundary001";
  const boundary2 = "boundaryboundary002";
  const mailData = [
    `MIME-Version: 1.0`,
    `To: ${to}`,
    `Subject: =?UTF-8?B?${Utilities.base64Encode(subject, Utilities.Charset.UTF_8)}?=`,
    `Content-Type: multipart/mixed; boundary=${boundary1}`,
    ``,
    `--${boundary1}`,
    `Content-Type: multipart/alternative; boundary=${boundary2}`,
    ``,
    `--${boundary2}`,
    `Content-Type: text/plain; charset=UTF-8`,
    ``,
    textBody,
    `--${boundary2}`,
    `Content-Type: text/html; charset=UTF-8`,
    `Content-Transfer-Encoding: base64`,
    ``,
    Utilities.base64Encode(htmlBody, Utilities.Charset.UTF_8),
    `--${boundary2}--`,
    `--${boundary1}`,
    `Content-Type: image/png; charset=UTF-8; name="sample1.png"`,
    `Content-Transfer-Encoding: base64`,
    ``,
    attachmentfile1,
    `--${boundary1}`,
    `Content-Type: image/png; charset=UTF-8; name="sample2.png"`,
    `Content-Transfer-Encoding: base64`,
    ``,
    attachmentfile2,
    `--${boundary1}--`,
  ].join("\r\n");
  return Utilities.base64EncodeWebSafe(mailData);
};

// Please run this function.
function terminEinladungVersendenWithAttachments() {
  const anrede = 2;
  const nachname = 3;
  const emailAdresse = 5;
  const terminTag = 6;
  const terminUhrzeit = 8;
  const terminURL = 9;
  let emailTemp = HtmlService.createTemplateFromFile('emailEinladung');
  const sh = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("terminBestaetigen");
  var wsVorlagen = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Vorlagen");
  var betreff = wsVorlagen.getRange("B1").getValue();
  const sr = 3;
  const data = sh.getRange(sr, 1, sh.getLastRow() - sr + 1, 11).getValues();
  var attachmentfile1 = Utilities.base64Encode(DriveApp.getFileById("[FILE_ID1]").getBlob().getBytes());
  var attachmentfile2 = Utilities.base64Encode(DriveApp.getFileById("[FILE_ID2]").getBlob().getBytes());

  var {requests, sent} = data.reduce((o, row, i) => {
    if (row[10] == "EMAIL NOT SENT YET") {
      emailTemp.anrede1 = (row[anrede]);
      emailTemp.nachname1 = (row[nachname]);
      emailTemp.emailAdresse1 = (row[emailAdresse]);
      emailTemp.terminTag1 = (row[terminTag]);
      emailTemp.terminUhrzeit1 = (row[terminUhrzeit]);
      emailTemp.terminURL1 = (row[terminURL]);
      var htmlMessage = emailTemp.evaluate().getContent();
      const obj = {
        to: row[emailAdresse],
        subject: betreff,
        textBody: "Dies ist eine Nachricht im HTML-Format. Sie müßen Ihre Email-Software entsprechend einrichten.",
        htmlBody: htmlMessage,
        attachmentfile1, attachmentfile2
      };
      o.requests.push({method: "POST", endpoint: "https://gmail.googleapis.com/gmail/v1/users/me/messages/send", requestBody: { raw: convert_(obj) }});
      o.sent.push("K" + (i + 3));
    }
    return o;
  }, {requests: [], sent: []});
  if (sent.length > 0) sh.getRangeList(sent).setValue("EMAIL SENT");
  const res = BatchRequest.EDo({ batchPath: "batch/gmail/v1", accessToken: ScriptApp.getOAuthToken(), requests: requests });
  console.log(res)
}

注意：

• 这个方法是我的尝试。所以请测试上面的脚本。

参考资料：

• Batching Requests for Gmail API
• BatchRequest of Google Apps Script library
• Method: users.messages.send