observe_export_resource_header/2
mod_export - Fetch the header for the export.
Type:
Return:
{ok, list()|binary()}
, {ok, list()|binary(), ContinuationState}
or {error, Reason}
#export_resource_header{}
properties:
dispatch:
atom
id:
m_rsc:resource_id()|undefined
content_type:
binary