1 class ApiController < ApplicationController
3 before_filter :authorize
4 after_filter :compress_output
9 #COUNT is the number of map requests to allow before exiting and starting a new process
13 @current_user = User.find_by_token(session[:token])
16 # The maximum area you're allowed to request, in square degrees
17 MAX_REQUEST_AREA = 0.25
20 # Number of GPS trace/trackpoints returned per-page
21 TRACEPOINTS_PER_PAGE = 5000
25 response.headers["Content-Type"] = 'text/xml'
26 #retrieve the page number
27 page = params['page'].to_i
33 report_error("Page number must be greater than or equal to 0")
37 offset = page * TRACEPOINTS_PER_PAGE
41 unless bbox and bbox.count(',') == 3
42 report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat")
46 bbox = bbox.split(',')
48 min_lon = bbox[0].to_f
49 min_lat = bbox[1].to_f
50 max_lon = bbox[2].to_f
51 max_lat = bbox[3].to_f
53 # check the bbox is sane
54 unless min_lon <= max_lon
55 report_error("The minimum longitude must be less than the maximum longitude, but it wasn't")
58 unless min_lat <= max_lat
59 report_error("The minimum latitude must be less than the maximum latitude, but it wasn't")
62 unless min_lon >= -180 && min_lat >= -90 && max_lon <= 180 && max_lat <= 90
63 report_error("The latitudes must be between -90 and 90, and longitudes between -180 and 180")
67 # check the bbox isn't too large
68 requested_area = (max_lat-min_lat)*(max_lon-min_lon)
69 if requested_area > MAX_REQUEST_AREA
70 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")
75 min_lat = min_lat * 1000000
76 max_lat = max_lat * 1000000
77 min_lon = min_lon * 1000000
78 max_lon = max_lon * 1000000
80 points = Tracepoint.find(:all, :conditions => ['gps_points.latitude > ? AND gps_points.longitude > ? AND gps_points.latitude < ? AND gps_points.longitude < ? AND ( public = 1 OR gpx_files.user_id = ? ) AND visible = 1', min_lat.to_i, min_lon.to_i, max_lat.to_i, max_lon.to_i, @user.id ], :select => "gps_points.*", :joins => "INNER JOIN gpx_files ON gpx_files.id = gpx_id", :offset => offset, :limit => TRACEPOINTS_PER_PAGE, :order => "timestamp DESC" )
82 doc = XML::Document.new
83 doc.encoding = 'UTF-8'
84 root = XML::Node.new 'gpx'
85 root['version'] = '1.0'
86 root['creator'] = 'OpenStreetMap.org'
87 root['xmlns'] = "http://www.topografix.com/GPX/1/0/"
91 track = XML::Node.new 'trk'
94 trkseg = XML::Node.new 'trkseg'
97 points.each do |point|
98 trkseg << point.to_xml_node()
101 #exit when we have too many requests
102 if @@count > MAX_COUNT
103 render :text => doc.to_s
108 render :text => doc.to_s
116 response.headers["Content-Type"] = 'text/xml'
117 # Figure out the bbox
118 bbox = params['bbox']
119 unless bbox and bbox.count(',') == 3
120 report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat")
124 bbox = bbox.split(',')
126 min_lon = bbox[0].to_f
127 min_lat = bbox[1].to_f
128 max_lon = bbox[2].to_f
129 max_lat = bbox[3].to_f
131 # check the bbox is sane
132 unless min_lon <= max_lon
133 report_error("The minimum longitude must be less than the maximum longitude, but it wasn't")
136 unless min_lat <= max_lat
137 report_error("The minimum latitude must be less than the maximum latitude, but it wasn't")
140 unless min_lon >= -180 && min_lat >= -90 && max_lon <= 180 && max_lat <= 90
141 report_error("The latitudes must be between -90 and 90, and longitudes between -180 and 180")
145 # check the bbox isn't too large
146 requested_area = (max_lat-min_lat)*(max_lon-min_lon)
147 if requested_area > MAX_REQUEST_AREA
148 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")
153 nodes = Node.find(:all, :conditions => ['latitude > ? AND longitude > ? AND latitude < ? AND longitude < ? AND visible = 1', min_lat, min_lon, max_lat, max_lon])
155 node_ids = nodes.collect {|node| node.id }
157 if node_ids.length > 50_000
158 report_error("You requested too many nodes (limit is 50,000). Either request a smaller area, or use planet.osm")
161 if node_ids.length == 0
162 render :text => '<osm></osm>'
168 if node_ids.length > 0
169 node_ids_sql = "(#{node_ids.join(',')})"
170 # get the referenced segments
171 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})"
173 # see if we have any missing nodes
174 segments_nodes = segments.collect {|segment| segment.node_a }
175 segments_nodes += segments.collect {|segment| segment.node_b }
179 missing_nodes = segments_nodes - node_ids
181 # get missing nodes if there are any
182 nodes += Node.find(missing_nodes) if missing_nodes.length > 0
184 doc = OSM::API.new.get_xml_doc
187 # find which ways are needed
188 segment_ids = segments.collect {|segment| segment.id }
190 if segment_ids.length > 0
191 way_segments = WaySegment.find_all_by_segment_id(segment_ids)
192 way_ids = way_segments.collect {|way_segment| way_segment.id }
193 ways = Way.find(way_ids) # NB: doesn't pick up segments, tags from db until accessed via way.way_segments etc.
195 # seg_ids = way_segments.collect {|way_segment| way_segment.segment_id }
197 list_of_way_segs = ways.collect {|way| way.way_segments}
198 list_of_way_segs.flatten!
200 list_of_way_segments = list_of_way_segs.collect { |way_seg| way_seg.segment_id }
204 segments_to_fetch = list_of_way_segments.uniq - segment_ids
206 if segments_to_fetch.length > 0
207 segments += Segment.find(segments_to_fetch)
213 segments_nodes = segments.collect {|segment| segment.node_a }
214 segments_nodes += segments.collect {|segment| segment.node_b }
216 node_ids_a = nodes.collect {|node| node.id }
218 nodes_to_get = segments_nodes - node_ids_a
219 nodes += Node.find(nodes_to_get) if nodes_to_get.length > 0
222 user_display_name_cache = {}
226 doc.root << node.to_xml_node(user_display_name_cache)
227 visible_nodes[node.id] = node
231 visible_segments = {}
233 segments.each do |segment|
234 if visible_nodes[segment.node_a] and visible_nodes[segment.node_b] and segment.visible?
235 doc.root << segment.to_xml_node(user_display_name_cache)
236 visible_segments[segment.id] = segment
241 doc.root << way.to_xml_node(visible_segments, user_display_name_cache) if way.visible?
244 render :text => doc.to_s
246 #exit when we have too many requests
247 if @@count > MAX_COUNT