Reading External Datagroup files via iControlREST

The process for uploading external dg is typically

1. Upload file
2. Import file via sys/file/ifile
3. Create ltm ifile reference to that file object

If you query that object file object, you end up with many attributes, none of which include the filename created in the filestore. But one attribute is

sourcePath

and as long as you are not cleaning up in between posts, you could potentially download that file, edit, re-upload, and then update the file object. Or, just make sure the source of truth is where your script is running, then you just update from there without being concerned what's in the current live version.

To answer your question, it IS possible to read the file, but you will need to do some bash calesthenics to interrogate the filestore to get the filename, but even then you still need to download the file to edit it.