Google Apps Script: Upload image to TinyPNG

TinyPngUpload.gs

var TINYPNG_API_KEY = "YOUR-TINYPNG-API-KEY";
var UPLOAD_TEST_FILE_ID = "GOOGLE-DRIVE-IMAGE-TEST-FILE-ID";

var TINYPNG_API_BASE_URL = "https://api.tinify.com";
var TINYPNG_API_UPLOAD_URL = TINYPNG_API_BASE_URL + "/shrink";

function uploadImageToTinyPng(blob) {
  Logger.log("Uploading image to TingPNG");
  
  var uploadParams = {
    "method": "POST",
    "muteHttpExceptions": true,
    "payload": blob.getBytes(),
    "contentLength": blob.getBytes().length,
    "headers": {
      "Authorization": "Basic " + Utilities.base64EncodeWebSafe("api:" + TINYPNG_API_KEY)
    }
  };
  
  // UrlFetchApp may throw
  var response = UrlFetchApp.fetch(TINYPNG_API_UPLOAD_URL, uploadParams);
  if(response.getResponseCode() > 299)
  {
    throw "TinyPNG Error: Upload operation failed with response code: " + response.getResponseCode();
  }
  
  return response.getHeaders().Location;
}

//-------------------------------------
function testTinyPngUpload() {
  var pdfFile = DriveApp.getFileById(UPLOAD_TEST_FILE_ID);
  try {
    var imageUrl = uploadImageToTinyPng(pdfFile.getThumbnail());
    Logger.log(imageUrl);
  }
  catch (err) {
    Logger.log("Problem uploading the image: " + err);
  }
}