-
- # External apps that use the api are able to query the api to find out some
- # parameters of the API. It currently returns:
- # * minimum and maximum API versions that can be used.
- # * maximum area that can be requested in a bbox request in square degrees
- # * number of tracepoints that are returned in each tracepoints page
- def capabilities
- doc = OSM::API.new.get_xml_doc
-
- api = XML::Node.new 'api'
- version = XML::Node.new 'version'
- version['minimum'] = "#{API_VERSION}";
- version['maximum'] = "#{API_VERSION}";
- api << version
- area = XML::Node.new 'area'
- area['maximum'] = MAX_REQUEST_AREA.to_s;
- api << area
- tracepoints = XML::Node.new 'tracepoints'
- tracepoints['per_page'] = TRACEPOINTS_PER_PAGE.to_s
- api << tracepoints
- waynodes = XML::Node.new 'waynodes'
- waynodes['maximum'] = MAX_NUMBER_OF_WAY_NODES.to_s
- api << waynodes
- changesets = XML::Node.new 'changesets'
- changesets['maximum_elements'] = Changeset::MAX_ELEMENTS.to_s
- api << changesets
- timeout = XML::Node.new 'timeout'
- timeout['seconds'] = API_TIMEOUT.to_s
- api << timeout
-
- doc.root << api
-
- render :text => doc.to_s, :content_type => "text/xml"
- end