class ApiController < ApplicationController
- def map
+ session :off
+ 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
+ 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 points
+ points = Tracepoint.find_by_area(min_lat, min_lon, max_lat, max_lon, :select => "DISTINCT *", :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(:all, :conditions => ['latitude BETWEEN ? AND ? AND longitude BETWEEN ? AND ? AND visible = 1', min_lat, max_lat, min_lon, max_lon])
+
+ 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='0.4'></osm>", :content_type => "text/xml"
+ return
+ end
+
+ # grab the segments
+ segments = Array.new
+ if node_ids.length > 0
+ node_ids_sql = "(#{node_ids.join(',')})"
+ # get the referenced segments
+ segments = Segment.find_by_sql "select * from current_segments where visible = 1 and (node_a in #{node_ids_sql} or node_b in #{node_ids_sql})"
+ end
+ # see if we have any missing nodes
+ segments_nodes = segments.collect {|segment| segment.node_a }
+ segments_nodes += segments.collect {|segment| segment.node_b }
+
+ segments_nodes.uniq!
+
+ missing_nodes = segments_nodes - node_ids
+
+ # get missing nodes if there are any
+ nodes += Node.find(missing_nodes) if missing_nodes.length > 0
+
+ doc = OSM::API.new.get_xml_doc
+
+ # get ways
+ # find which ways are needed
+ segment_ids = segments.collect {|segment| segment.id }
+ ways = Array.new
+ if segment_ids.length > 0
+ way_segments = WaySegment.find_all_by_segment_id(segment_ids)
+ way_ids = way_segments.collect {|way_segment| way_segment.id }
+ ways = Way.find(way_ids) # NB: doesn't pick up segments, tags from db until accessed via way.way_segments etc.
+
+ # seg_ids = way_segments.collect {|way_segment| way_segment.segment_id }
+
+ list_of_way_segs = ways.collect {|way| way.way_segments}
+ list_of_way_segs.flatten!
+
+ list_of_way_segments = list_of_way_segs.collect { |way_seg| way_seg.segment_id }
+
+ else
+ list_of_way_segments = Array.new
+ end
+
+ # - [0] in case some thing links to segment 0 which doesn't exist. Shouldn't actually ever happen but it does. FIXME: file a ticket for this
+ segments_to_fetch = (list_of_way_segments.uniq - segment_ids) - [0]
+
+ if segments_to_fetch.length > 0
+ segments += Segment.find(segments_to_fetch)
+ end
+
+ # get more nodes
+ #
+
+ segments_nodes = segments.collect {|segment| segment.node_a }
+ segments_nodes += segments.collect {|segment| segment.node_b }
+
+ node_ids_a = nodes.collect {|node| node.id }
+
+ nodes_to_get = segments_nodes - node_ids_a
+ nodes += Node.find(nodes_to_get) if nodes_to_get.length > 0
+
+ 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
+
+ visible_segments = {}
+
+ segments.each do |segment|
+ if visible_nodes[segment.node_a] and visible_nodes[segment.node_b] and segment.visible?
+ doc.root << segment.to_xml_node(user_display_name_cache)
+ visible_segments[segment.id] = segment
+ end
+ end
+
+ ways.each do |way|
+ doc.root << way.to_xml_node(visible_segments, user_display_name_cache) if way.visible?
+ 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 capabilities
+ doc = OSM::API.new.get_xml_doc
+ api = XML::Node.new 'api'
+ version = XML::Node.new 'version'
+ version['minimum'] = '0.4';
+ version['maximum'] = '0.4';
+ 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