In order to use the 'core_files_upload' web service one needs to supply the 'contextid' parameter. However, using web services how does one establish this value?
If, for example, I want to upload files to the file submissions area of an assignment. I will have the cmid of the assignment. Internally, I would call context_module::get_instance($cmid) to establish the contextid but I can't do this using web services.
Am I missing something or does this just need a tracker request for a new service to plug this gap?