Prevent From Updating Files for a Given Blob Provider

We want a way to configure the list of blob providers for which the Web UI prevents the user from updating the file. Ways to update a file include:

• the file widget,
• the drag'ndrop on the summary file widget,
• the drag'n drop in a folder (if the name is the same than the name of a blob stored in a child document, the file updates the file property of that document),
• Nuxeo Drive synchronization.

To disable updates for a given blob provider, in the <blobprovider> definition add the following property:

      <property name="preventUserUpdate">true</property>

For instance you could have:

  <extension target="org.nuxeo.ecm.core.blob.BlobManager" point="configuration">
    <blobprovider name="googledrive">
      <class>org.nuxeo.ecm.liveconnect.google.drive.GoogleDriveBlobProvider</class>
      <property name="preventUserUpdate">true</property>
    </blobprovider>
  </extension>

The Google Drive and Dropbox blob providers don't prevent user updates by default. But the Filesystem blob provider does prevent updates by default.