We have this functionality already available. Look in the documentation for "Partial File Update" for a full description of how to use it along with some examples. The basic implementation lets you treat the upload the same way you would as partial file upload via http but instead upload just...

The Partial file update allows you to update a file that already exists on our system. This means you can either update some or all of the file. If you were to develop a backup application that uploads the original word document then detects the data has changed (By MD5 or some other similar method like...