Office Web Apps 2013 is now standalone service product. SharePoint used it from iframe like this
https://officewebapps.contoso.com/wv/wordviewerframe.aspx? sharepoint_doc_handler_url + accesstoken
Some info Introducing Office Web Apps Server
I want to use it in my application, but i don't know the way to generate right URL to preview document. I've got an error.
There's a configuration problem preventing us from getting your document. If possible, try opening this document in Microsoft Word.
Did anybody know how the SharePoint uses the Office Web Apps 2013 ?