Overwrite an Image File with Google Apps Script

Question

Can I overwrite an image file with Google Apps Script? I\'ve tried:

file.setContent(newBlobImage);
file.replace(newBlobImage);

Neither of

Answer 1

An image file can be overwritten with Google Apps Script and the DriveAPI using the update() method:

.update(File resource, String fileId, Blob mediaData)

Where file resource is:

var myFileName = 'fileName' + '.jpg';

var file = {
  title: myFileName,
  mimeType: 'image/jpeg'
};

I'm getting the file ID with the DriveApp service, and the Blob is what was uploaded by the user.

In order to use DriveAPI, you need to add it through the Resources, Advanced Google Services menu. Set the Drive API to ON.

var allFilesByName,file,myFolder,myVar,theFileID,thisFile;
   //Define var names without assigning a value

file = {
  title: myFileName,
  mimeType: 'image/jpeg'
};

myFolder = DriveApp.getFolderById('Folder ID');

allFilesByName = myFolder.getFilesByName(myFileName);

while (allFilesByName.hasNext()) {
  thisFile = allFilesByName.next();
  theFileID = thisFile.getId();
  //Logger.log('theFileID: ' + theFileID);
  
  myVar = Drive.Files.update(file, theFileID, uploadedBlob);
};