Google spreadsheet script for data uploading

uploader.js

// Example data upload:
// curl -L -H 'Content-Type: application/json' -d '{"id":"sheet1","names":["timestamp","ram"],"points":[[1,2],[3,4]]}' THIS_SCRIPT_URL
function doPost(e) {
  try {
    var obj = JSON.parse(e.postData.contents);
    var doc = SpreadsheetApp.getActiveSpreadsheet();
    var name = obj.id || 'DATA';
    var sheet = doc.getSheetByName(name);
    if (!sheet) {
      doc.insertSheet(name);
      sheet = doc.getSheetByName(name);
      range = sheet.getRange("H1:Z1");
      sheet.deleteColumns(8, range.getNumColumns());
      if (obj.names) sheet.appendRow(obj.names);
      var chart = sheet.newChart()
        .addRange(sheet.getRange('a1:b9999'))
        .setChartType(Charts.ChartType.AREA)
        .setOption('useFirstColumnAsDomain', true)
        .setPosition(1, 3, 400, 200)
        .build();
      sheet.insertChart(chart);
    }
    var points = obj.points || [];
    for (var i = 0; i < points.length; i++) {
      sheet.appendRow(points[i]);
    }
    return ContentService  // return json success results
    .createTextOutput(JSON.stringify({"result": "success", obj: obj}))
        .setMimeType(ContentService.MimeType.JSON);
  } catch (error) {  // if error return this
    return ContentService
        .createTextOutput(JSON.stringify({"result": "error", "error": error}))
        .setMimeType(ContentService.MimeType.JSON);
  }
}