class ApiController < ApplicationController
- def map
+ session :off
+ before_filter :check_read_availability, :except => [:capabilities]
+ after_filter :compress_output
+
+ #COUNT is the number of map requests to allow before exiting and starting a new process
+ @@count = COUNT
+
+ # The maximum area you're allowed to request, in square degrees
+ MAX_REQUEST_AREA = 0.25
+
+
+ # Number of GPS trace/trackpoints returned per-page
+ TRACEPOINTS_PER_PAGE = 5000
+
+ def trackpoints
+ @@count+=1
+ #retrieve the page number
+ page = params['page'].to_i
+ unless page
+ page = 0;
+ end
+
+ 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
- render :nothing => true, :status => 400
+ 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_lat = bbox[0].to_f
- min_lon = bbox[1].to_f
- max_lat = bbox[2].to_f
- max_lon = bbox[3].to_f
+ min_lon = bbox[0].to_f
+ min_lat = bbox[1].to_f
+ max_lon = bbox[2].to_f
+ max_lat = bbox[3].to_f
- nodes = Node.find(:all, :conditions => ['latitude > ? AND longitude > ? AND latitude < ? AND longitude < ? AND visible = 1', min_lat, min_lon, max_lat, max_lon])
+ # check the bbox is sane
+ unless min_lon <= max_lon
+ report_error("The minimum longitude must be less than the maximum longitude, but it wasn't")
+ return
+ end
+ unless min_lat <= max_lat
+ report_error("The minimum latitude must be less than the maximum latitude, but it wasn't")
+ return
+ end
+ unless min_lon >= -180 && min_lat >= -90 && max_lon <= 180 && max_lat <= 90
+ report_error("The latitudes must be between -90 and 90, and longitudes between -180 and 180")
+ return
+ end
- node_ids = "(#{nodes.collect {|node| node.id }})"
+ # check the bbox isn't too large
+ requested_area = (max_lat-min_lat)*(max_lon-min_lon)
+ if requested_area > MAX_REQUEST_AREA
+ report_error("The maximum bbox size is " + MAX_REQUEST_AREA.to_s + ", and your request was too large. Either request a smaller area, or use planet.osm")
+ return
+ end
- segments = Segment.find(:all, :condtions => ['node_a in ? or node_b in ?', node_ids, node_ids])
- render :text => node_ids.join(',')
- return
+ # get all the points
+ points = Tracepoint.find_by_area(min_lat, min_lon, max_lat, max_lon, :offset => offset, :limit => TRACEPOINTS_PER_PAGE, :order => "timestamp DESC" )
doc = XML::Document.new
- doc.encoding = 'UTF-8'
- root = XML::Node.new 'osm'
- root['version'] = '0.4'
- root['generator'] = 'OpenStreetMap server'
+ doc.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
- render :text => doc.to_s
+ track = XML::Node.new 'trk'
+ doc.root << track
+
+ trkseg = XML::Node.new 'trkseg'
+ track << trkseg
+
+ points.each do |point|
+ trkseg << point.to_xml_node()
+ end
+
+ #exit when we have too many requests
+ if @@count > MAX_COUNT
+ render :text => doc.to_s, :content_type => "text/xml"
+ @@count = COUNT
+ exit!
+ end
+
+ render :text => doc.to_s, :content_type => "text/xml"
+
+ end
+
+ def map
+ GC.start
+ @@count+=1
+
+ # 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 = bbox[0].to_f
+ min_lat = bbox[1].to_f
+ max_lon = bbox[2].to_f
+ max_lat = bbox[3].to_f
+
+ # check the bbox is sane
+ unless min_lon <= max_lon
+ report_error("The minimum longitude must be less than the maximum longitude, but it wasn't")
+ return
+ end
+ unless min_lat <= max_lat
+ report_error("The minimum latitude must be less than the maximum latitude, but it wasn't")
+ return
+ end
+ unless min_lon >= -180 && min_lat >= -90 && max_lon <= 180 && max_lat <= 90
+ report_error("The latitudes must be between -90 and 90, and longitudes between -180 and 180")
+ return
+ end
+
+ # check the bbox isn't too large
+ requested_area = (max_lat-min_lat)*(max_lon-min_lon)
+ if requested_area > MAX_REQUEST_AREA
+ report_error("The maximum bbox size is " + MAX_REQUEST_AREA.to_s +
+ ", and your request was too large. Either request a smaller area, or use planet.osm")
+ return
+ end
+
+ # get all the nodes
+ nodes = Node.find_by_area(min_lat, min_lon, max_lat, max_lon, :conditions => "visible = 1")
+
+ node_ids = nodes.collect {|node| node.id }
+
+ if node_ids.length > 50_000
+ report_error("You requested too many nodes (limit is 50,000). Either request a smaller area, or use planet.osm")
+ return
+ end
+
+ if node_ids.length == 0
+ render :text => "<osm version='0.5'></osm>", :content_type => "text/xml"
+ return
+ end
+
+ relations = Array.new
+
+ doc = OSM::API.new.get_xml_doc
+
+ # 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 }
+ ways = Way.find(way_ids)
+
+ 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)
+ end
+
+ visible_nodes = {}
+ user_display_name_cache = {}
+
+ nodes.each do |node|
+ if node.visible?
+ doc.root << node.to_xml_node(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, user_display_name_cache)
+ way_ids << way.id
+ end
+ end
+
+ # collect relationships. currently done in one big block at the end;
+ # may need to move this upwards if people want automatic completion of
+ # relationships, i.e. deliver referenced objects like we do with ways...
+ relations = Array.new
+ if visible_nodes.length > 0
+ relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+ "e.visible=1 and " +
+ "em.id = e.id and em.member_type='node' and em.member_id in (#{visible_nodes.keys.join(',')})")
+ end
+ if way_ids.length > 0
+ relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+ "e.visible=1 and " +
+ "em.id = e.id and em.member_type='way' and em.member_id in (#{way_ids.join(',')})")
+ end
+ # 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)
+ relation_ids = relations.collect { |relation| relation.id }
+ if relation_ids.length > 0
+ relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+ "e.visible=1 and " +
+ "em.id = e.id and em.member_type='relation' and em.member_id in (#{relation_ids.join(',')})")
+ end
+
+ # 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(user_display_name_cache)
+ end
+
+ render :text => doc.to_s, :content_type => "text/xml"
- #el1 = XML::Node.new 'node'
- #el1['id'] = self.id.to_s
- #el1['lat'] = self.latitude.to_s
- #el1['lon'] = self.longitude.to_s
- #Node.split_tags(el1, self.tags)
- #el1['visible'] = self.visible.to_s
- #el1['timestamp'] = self.timestamp.xmlschema
- #root << el1
+ #exit when we have too many requests
+ if @@count > MAX_COUNT
+ @@count = COUNT
+
+ exit!
+ end
end
+ 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
+ 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 :nothing => true, :status => :bad_request
+ end
+ end
+
+ def capabilities
+ doc = OSM::API.new.get_xml_doc
+
+ api = XML::Node.new 'api'
+ version = XML::Node.new 'version'
+ version['minimum'] = '0.5';
+ version['maximum'] = '0.5';
+ api << version
+ area = XML::Node.new 'area'
+ area['maximum'] = MAX_REQUEST_AREA.to_s;
+ api << area
+
+ doc.root << api
+
+ render :text => doc.to_s, :content_type => "text/xml"
+ end
end
projects / rails.git / blobdiff