-
- before_filter :check_api_readable, :except => [:capabilities]
- after_filter :compress_output
- around_filter :api_call_handle_error, :api_call_timeout
-
- # Help methods for checking boundary sanity and area size
- include MapBoundary
-
- # Get an XML response containing a list of tracepoints that have been uploaded
- # within the specified bounding box, and in the specified page.
- def trackpoints
- #retrieve the page number
- page = params['page'].to_s.to_i
-
- unless page >= 0
- report_error("Page number must be greater than or equal to 0")
- return
- end
-
- offset = page * TRACEPOINTS_PER_PAGE
-
- # Figure out the bbox
- bbox = params['bbox']
- unless bbox and bbox.count(',') == 3
- report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat")
- return
- end
-
- bbox = bbox.split(',')
- min_lon, min_lat, max_lon, max_lat = sanitise_boundaries(bbox)
- # check boundary is sane and area within defined
- # see /config/application.yml
- begin
- check_boundaries(min_lon, min_lat, max_lon, max_lat)
- rescue Exception => err
- report_error(err.message)
- return
- end
-
- # get all the points
- points = Tracepoint.find_by_area(min_lat, min_lon, max_lat, max_lon, :offset => offset, :limit => TRACEPOINTS_PER_PAGE, :order => "gpx_id DESC, trackid ASC, timestamp ASC" )
-
- doc = XML::Document.new
- doc.encoding = XML::Encoding::UTF_8
- root = XML::Node.new 'gpx'
- root['version'] = '1.0'
- root['creator'] = 'OpenStreetMap.org'
- root['xmlns'] = "http://www.topografix.com/GPX/1/0/"
-
- doc.root = root
-
- # initialise these variables outside of the loop so that they
- # stay in scope and don't get free'd up by the GC during the
- # loop.
- gpx_id = -1
- trackid = -1
- track = nil
- trkseg = nil
- anon_track = nil
- anon_trkseg = nil
- gpx_file = nil
- timestamps = false
-
- points.each do |point|
- if gpx_id != point.gpx_id
- gpx_id = point.gpx_id
- trackid = -1
- gpx_file = Trace.find(gpx_id)
-
- if gpx_file.trackable?
- track = XML::Node.new 'trk'
- doc.root << track
- timestamps = true
-
- if gpx_file.identifiable?
- track << (XML::Node.new("name") << gpx_file.name)
- track << (XML::Node.new("desc") << gpx_file.description)
- track << (XML::Node.new("url") << url_for(:controller => 'trace', :action => 'view', :id => gpx_file.id))
- end
- else
- # use the anonymous track segment if the user hasn't allowed
- # their GPX points to be tracked.
- timestamps = false
- if anon_track.nil?
- anon_track = XML::Node.new 'trk'
- doc.root << anon_track
- end
- track = anon_track
- end
- end
-
- if trackid != point.trackid
- if gpx_file.trackable?
- trkseg = XML::Node.new 'trkseg'
- track << trkseg
- trackid = point.trackid
- else
- if anon_trkseg.nil?
- anon_trkseg = XML::Node.new 'trkseg'
- anon_track << anon_trkseg
- end
- trkseg = anon_trkseg
- end
- end
-
- trkseg << point.to_xml_node(timestamps)
- end
-
- response.headers["Content-Disposition"] = "attachment; filename=\"tracks.gpx\""
-
- render :text => doc.to_s, :content_type => "text/xml"
- end
-
- # This is probably the most common call of all. It is used for getting the
- # OSM data for a specified bounding box, usually for editing. First the
- # bounding box (bbox) is checked to make sure that it is sane. All nodes
- # are searched, then all the ways that reference those nodes are found.
- # All Nodes that are referenced by those ways are fetched and added to the list
- # of nodes.
- # Then all the relations that reference the already found nodes and ways are
- # fetched. All the nodes and ways that are referenced by those ways are then
- # fetched. Finally all the xml is returned.
- def map
- # Figure out the bbox
- bbox = params['bbox']
-
- unless bbox and bbox.count(',') == 3
- # alternatively: report_error(TEXT['boundary_parameter_required']
- report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat")
- return
- end
-
- bbox = bbox.split(',')
-
- min_lon, min_lat, max_lon, max_lat = sanitise_boundaries(bbox)
-
- # check boundary is sane and area within defined
- # see /config/application.yml
- begin
- check_boundaries(min_lon, min_lat, max_lon, max_lat)
- rescue Exception => err
- report_error(err.message)
- return
- end
-
- # FIXME um why is this area using a different order for the lat/lon from above???
- @nodes = Node.find_by_area(min_lat, min_lon, max_lat, max_lon, :conditions => {:visible => true}, :include => :node_tags, :limit => MAX_NUMBER_OF_NODES+1)
- # get all the nodes, by tag not yet working, waiting for change from NickB
- # need to be @nodes (instance var) so tests in /spec can be performed
- #@nodes = Node.search(bbox, params[:tag])
-
- node_ids = @nodes.collect(&:id)
- if node_ids.length > MAX_NUMBER_OF_NODES
- report_error("You requested too many nodes (limit is #{MAX_NUMBER_OF_NODES}). Either request a smaller area, or use planet.osm")
- return
- end
- if node_ids.length == 0
- render :text => "<osm version='#{API_VERSION}' generator='#{GENERATOR}'></osm>", :content_type => "text/xml"
- return
- end
-
- doc = OSM::API.new.get_xml_doc
-
- # add bounds
- bounds = XML::Node.new 'bounds'
- bounds['minlat'] = min_lat.to_s
- bounds['minlon'] = min_lon.to_s
- bounds['maxlat'] = max_lat.to_s
- bounds['maxlon'] = max_lon.to_s
- doc.root << bounds
-
- # get ways
- # find which ways are needed
- ways = Array.new
- if node_ids.length > 0
- way_nodes = WayNode.find_all_by_node_id(node_ids)
- way_ids = way_nodes.collect { |way_node| way_node.id[0] }
- ways = Way.find(way_ids, :include => [:way_nodes, :way_tags])
-
- list_of_way_nodes = ways.collect { |way|
- way.way_nodes.collect { |way_node| way_node.node_id }
- }
- list_of_way_nodes.flatten!
-
- else
- list_of_way_nodes = Array.new
- end
-
- # - [0] in case some thing links to node 0 which doesn't exist. Shouldn't actually ever happen but it does. FIXME: file a ticket for this
- nodes_to_fetch = (list_of_way_nodes.uniq - node_ids) - [0]
-
- if nodes_to_fetch.length > 0
- @nodes += Node.find(nodes_to_fetch, :include => :node_tags)
- end
-
- visible_nodes = {}
- changeset_cache = {}
- user_display_name_cache = {}
-
- @nodes.each do |node|
- if node.visible?
- doc.root << node.to_xml_node(changeset_cache, user_display_name_cache)
- visible_nodes[node.id] = node
- end
- end
-
- way_ids = Array.new
- ways.each do |way|
- if way.visible?
- doc.root << way.to_xml_node(visible_nodes, changeset_cache, user_display_name_cache)
- way_ids << way.id
- end
- end
-
- relations = Relation.find_for_nodes(visible_nodes.keys, :conditions => {:visible => true}) +
- Relation.find_for_ways(way_ids, :conditions => {:visible => true})
-
- # we do not normally return the "other" partners referenced by an relation,
- # e.g. if we return a way A that is referenced by relation X, and there's
- # another way B also referenced, that is not returned. But we do make
- # an exception for cases where an relation references another *relation*;
- # in that case we return that as well (but we don't go recursive here)
- relations += Relation.find_for_relations(relations.collect { |r| r.id }, :conditions => {:visible => true})
-
- # this "uniq" may be slightly inefficient; it may be better to first collect and output
- # all node-related relations, then find the *not yet covered* way-related ones etc.
- relations.uniq.each do |relation|
- doc.root << relation.to_xml_node(nil, changeset_cache, user_display_name_cache)
- end
-
- response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\""
-
- render :text => doc.to_s, :content_type => "text/xml"
- end
-
- # Get a list of the tiles that have changed within a specified time
- # period
- def changes
- zoom = (params[:zoom] || '12').to_i
-
- if params.include?(:start) and params.include?(:end)
- starttime = Time.parse(params[:start])
- endtime = Time.parse(params[:end])
- else
- hours = (params[:hours] || '1').to_i.hours
- endtime = Time.now.getutc
- starttime = endtime - hours
- end
-
- if zoom >= 1 and zoom <= 16 and
- endtime > starttime and endtime - starttime <= 24.hours
- mask = (1 << zoom) - 1
-
- tiles = Node.count(:conditions => ["timestamp BETWEEN ? AND ?", starttime, endtime],
- :group => "maptile_for_point(latitude, longitude, #{zoom})")
-
- doc = OSM::API.new.get_xml_doc
- changes = XML::Node.new 'changes'
- changes["starttime"] = starttime.xmlschema
- changes["endtime"] = endtime.xmlschema
-
- tiles.each do |tile, count|
- x = (tile.to_i >> zoom) & mask
- y = tile.to_i & mask
-
- t = XML::Node.new 'tile'
- t["x"] = x.to_s
- t["y"] = y.to_s
- t["z"] = zoom.to_s
- t["changes"] = count.to_s
-
- changes << t
- end
-
- doc.root << changes
-
- render :text => doc.to_s, :content_type => "text/xml"
- else
- render :text => "Requested zoom is invalid, or the supplied start is after the end time, or the start duration is more than 24 hours", :status => :bad_request
- end
- end
-
- # 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
projects / rails.git / blobdiff