function doGet(e) {
  //return HtmlService.createHtmlOutputFromFile('form.html');
   return  HtmlService.createHtmlOutput('<!--Web: ctrlq.org;  Twitter: @labnol; Email: amit@labnol.org; -->' +
'<form id="myForm"><input type="file" name="myFile"><input type="submit" value="Upload File"  onclick="this.value=\'Uploading..\';  google.script.run.withSuccessHandler(fileUploaded) .uploadFiles(this.parentNode);  return false;"></form>' +
'<div id="output"></div> <script>  function fileUploaded(status) {    document.getElementById("myForm").style.display = "none";    console.log(status);  document.getElementById("output").innerHTML = status;      }</script>'+
'<style> input { display:block; margin: 20px; }</style>');
}


function uploadFiles(form) {
  try {
    var targetFold = "uploads";
    var folder, folders = DriveApp.getFoldersByName(targetFold);

    if (folders.hasNext()) {   folder = folders.next();  }
    else {  folder = DriveApp.createFolder(targetFold );  }
    var fileBlob = form.myFile;
    var Upldfile = DriveApp.getFilesByName(form.myFile);
    if (Upldfile.hasNext() !== true) {
        var file = folder.createFile(form.myFile);
        return  file.getName()  +"| uploaded successfully:  " + file.getUrl();
    }
    else { return "file already exists";  }
  } catch (error) {
    return error.toString();
  }

}