function doGet(e) {
  var type = "";
  if (e.parameter.type) {
    switch (String(e.parameter.type).toLowerCase()) {
      case "json":
        type = "json";
        break;
      case "csv":
        type = "csv";
        break;
      default:
        type = "csv";
    }

  } else {
    type = "csv";
  }

  const sheet = SpreadsheetApp.openById("SPREADSHEET_ID") // <-- ID of spreadsheet to scrape
    .getsheets()[0]
    .getSheetValues(1, 1, sheet.getMaxRows(), sheet.getMaxColumns());

  const colNames = data[0].filter((val) => val.toString().length > 0);

  const trimRegex = /,*$/;
  const blankLineRegex = /^[\s\n\r]*/gm;
  var csvRows = new Array();
  var jsonContent = {
    "time": new Date(Date.now()).toISOString(),
    "codes": []
  };

  for (const row of sheet) {
    if (type == "csv") {
      csvRows.push(row.join(",").replace(trimRegex, ""));
    } else {
      if (row[1].toString().length > 0) {
        var newObj = {};
        row.join().replace(trimRegex, "").split(",").forEach((val, i) => {
          newObj[colNames[i]] = val.toString();
        });
        jsonContent.codes.push(newObj);
      }
    }
  }

  const output = ContentService.createTextOutput();
  if (type == "csv") {
    output.setContent(csvRows.join("\u000A").replace(blankLineRegex, ""));
    output.setMimeType(ContentService.MimeType.CSV);
  } else {
    jsonContent.codes = jsonContent.codes.slice(1)
    output.setContent(JSON.stringify(jsonContent));
    output.setMimeType(ContentService.MimeType.JSON);
  }

  return output;
}