I'm developing an Alfresco client which uses the OpenCMIS (Apache Chemistry) to upload files into Alfresco. I would like to know if there is a way to make a single file read-only for everyone.
Thanks, Miretz
In theory, you'll need to use CMIS to alter the Access Controls on the node to change the permissions.
However...
From what you've described, I think your node will have "Inherit Permissions" turned on. This means that you can grant additional permissions with CMIS, via the Access Controls functionality, but you can't remove any permissions that come from the parent. This Alfresco forum thread has more on it. Currently, I believe you'll need to use a tiny bit of Alfresco code (rule JS, Java, WebScript etc) to turn off the "Inherit Permissions" on your node. You can then use CMIS to grant people read access to it, without write (Consumer)