Re: For Alfresco 5.2, when creating a node, the folder name might already exist. Is it possible to either overwrite the folder, or get the folder node id in the response?
It's not the only option jus the easiest one.
You always can check manually the existence of the node listing the childs of the parent folder and comparing the names. You can do that in your own application or in a custom rest service in Alfresco that you could call from your app.