Google Apps Script code that saves HTML formatted text as a gmail draft using UTF-8

google-apps-script_save-as-draft.gs

/* CREDIT */ 
// Code base and instructions for how to set it up - Cyrus Loree: http://stackoverflow.com/questions/25391740/how-to-use-the-google-apps-script-code-for-creating-a-draft-email-from-985/25457193#25457193
// How to format raw email data - Tholle: http://stackoverflow.com/questions/24908700/mail-attachment-wrong-media-type-gmail-api/24957873#24957873
// Additional added functionality by me: UTF-8 encoding, so that it works for any kind of characters (eg Nordic å, ä, ö)

function createDraft(to, cc, sendAs, subject, htmlBody) {
  try{
  var forScope = GmailApp.getInboxUnreadCount(); // needed for auth scope

  var raw = 
      'Subject: ' + subject + '\r\n' + 
      'To: ' + to + '\r\n' +
      'Cc: ' + cc + '\r\n' +
      'From: ' + sendAs + '\r\n' +
      'Content-Type: multipart/alternative; boundary=1234567890123456789012345678\r\n' +
      '--1234567890123456789012345678\r\n' +
      'Content-Type: text/html; charset="UTF-8"\r\n' +
      'MIME-Version: 1.0\r\n' +
      'Content-Transfer-Encoding: 7bit\r\n\r\n' +
      htmlBody + '\r\n' + 
      '--1234567890123456789012345678--\n';
    
  var draftBody = Utilities.base64Encode(raw, Utilities.Charset.UTF_8);

  var params = {method:"post",
                contentType: "application/json",
                headers: {"Authorization": "Bearer " + ScriptApp.getOAuthToken()},
                muteHttpExceptions:true,
                payload:JSON.stringify({
                  "message": {
                    "raw": draftBody
                  }
                })
               };

  var resp = UrlFetchApp.fetch("https://www.googleapis.com/gmail/v1/users/me/drafts", params);
  Logger.log(resp.getContentText());
  }catch(err){
    Logger.log(err.lineNumber + ' - ' + err);
  }
}


/* EXAMPLE HTML TEXT */

/**
 <b># DL to reply:</b> 10th of September<br/><br/>
 Hello, hello! :)<br/><br/>
 This is an example HTML text. I can link to <a href='www.google.com'>google</a> and even include an image from the web! :D<br/><br/>
 <img src='http://cdn.litlepups.net/2016/04/17/kitten-free-stock-photo-a-cute-orange-kitten-isolated-on-a-white.jpg'/><br/><br/>
 Hugs,<br/>
 Sender
 **/