How to make a Drive API batch request with UrlFetchApp in Google Apps Script

Question

I would like to know how to make a Drive API batch request with UrlFetchApp in Google Apps Script. I\'ve read the google documentation but it still isn\'t clear to me. I wan

Answer 1

How about this sample script? When I saw this document, I could find that the API calls you want to do batch request are sent using multipart/mixed. By this, I could create a sample script for Google Apps Script as follows.

Sample script :

function myFunction() {
  var body = [
    {
      method: "POST",
      endpoint: "https://www.googleapis.com/drive/v3/files/### fileId 1 ###/permissions",
      requestBody: {
       "role": "owner",
       "type": "user",
       "emailAddress": NEWOWNER
      }
    },
    {
      method: "POST",
      endpoint: "https://www.googleapis.com/drive/v3/files/### fileId 2 ###/permissions",
      requestBody: {
       "role": "owner",
       "type": "user",
       "emailAddress": NEWOWNER
      }
    }
  ];

  var boundary = "xxxxxxxxxx";
  var contentId = 0;
  var data = "--" + boundary + "\r\n";
  for (var i in body) {
        data += "Content-Type: application/http\r\n";
        data += "Content-ID: " + ++contentId + "\r\n\r\n";
        data += body[i].method + " " + body[i].endpoint + "\r\n";
        data += body[i].requestBody ? "Content-Type: application/json; charset=utf-8\r\n\r\n" : "\r\n";
        data += body[i].requestBody ? JSON.stringify(body[i].requestBody) + "\r\n" : "";
        data += "--" + boundary + "\r\n";
  }
  var payload = Utilities.newBlob(data).getBytes();
  var options = {
    method: "post",
    contentType: "multipart/mixed; boundary=" + boundary,
    payload: payload,
    headers: {'Authorization': 'Bearer ' + ScriptApp.getOAuthToken()},
    muteHttpExceptions: true,
  };
  var res = UrlFetchApp.fetch("https://www.googleapis.com/batch", options).getContentText();
  Logger.log(res);
}

Note :

• Please modify this sample script for your environment.
• If you want more APIs, please add the elements to the array of "body".
• It supposes that you have already enabled Drive API.
• Drive API can be used the maximum of 100 calls in one batch request. This is a limitation.
• For the batch request, each API call is no guaranteed ordering.

In my environment, I confirmed that this works. But if this didn't work in your environment, please tell me. I would like to modify.