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
12 # The maximum area you're allowed to request, in square degrees
13 MAX_REQUEST_AREA = 0.25
16 # Number of GPS trace/trackpoints returned per-page
17 TRACEPOINTS_PER_PAGE = 5000
21 response.headers["Content-Type"] = 'text/xml'
22 #retrieve the page number
23 page = params['page'].to_i
29 report_error("Page number must be greater than or equal to 0")
33 offset = page * TRACEPOINTS_PER_PAGE
37 unless bbox and bbox.count(',') == 3
38 report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat")
42 bbox = bbox.split(',')
44 min_lon = bbox[0].to_f
45 min_lat = bbox[1].to_f
46 max_lon = bbox[2].to_f
47 max_lat = bbox[3].to_f
49 # check the bbox is sane
50 unless min_lon <= max_lon
51 report_error("The minimum longitude must be less than the maximum longitude, but it wasn't")
54 unless min_lat <= max_lat
55 report_error("The minimum latitude must be less than the maximum latitude, but it wasn't")
58 unless min_lon >= -180 && min_lat >= -90 && max_lon <= 180 && max_lat <= 90
59 report_error("The latitudes must be between -90 and 90, and longitudes between -180 and 180")
63 # check the bbox isn't too large
64 requested_area = (max_lat-min_lat)*(max_lon-min_lon)
65 if requested_area > MAX_REQUEST_AREA
66 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")
71 min_lat = min_lat * 1000000
72 max_lat = max_lat * 1000000
73 min_lon = min_lon * 1000000
74 max_lon = max_lon * 1000000
76 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" )
78 doc = XML::Document.new
79 doc.encoding = 'UTF-8'
80 root = XML::Node.new 'gpx'
81 root['version'] = '1.0'
82 root['creator'] = 'OpenStreetMap.org'
83 root['xmlns'] = "http://www.topografix.com/GPX/1/0/"
87 track = XML::Node.new 'trk'
90 trkseg = XML::Node.new 'trkseg'
93 points.each do |point|
94 trkseg << point.to_xml_node()
97 #exit when we have too many requests
98 if @@count > MAX_COUNT
99 render :text => doc.to_s
104 render :text => doc.to_s
112 response.headers["Content-Type"] = 'text/xml'
113 # Figure out the bbox
114 bbox = params['bbox']
115 unless bbox and bbox.count(',') == 3
116 report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat")
120 bbox = bbox.split(',')
122 min_lon = bbox[0].to_f
123 min_lat = bbox[1].to_f
124 max_lon = bbox[2].to_f
125 max_lat = bbox[3].to_f
127 # check the bbox is sane
128 unless min_lon <= max_lon
129 report_error("The minimum longitude must be less than the maximum longitude, but it wasn't")
132 unless min_lat <= max_lat
133 report_error("The minimum latitude must be less than the maximum latitude, but it wasn't")
136 unless min_lon >= -180 && min_lat >= -90 && max_lon <= 180 && max_lat <= 90
137 report_error("The latitudes must be between -90 and 90, and longitudes between -180 and 180")
141 # check the bbox isn't too large
142 requested_area = (max_lat-min_lat)*(max_lon-min_lon)
143 if requested_area > MAX_REQUEST_AREA
144 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")
149 nodes = Node.find(:all, :conditions => ['latitude > ? AND longitude > ? AND latitude < ? AND longitude < ? AND visible = 1', min_lat, min_lon, max_lat, max_lon])
151 node_ids = nodes.collect {|node| node.id }
153 if node_ids.length > 50_000
154 report_error("You requested too many nodes (limit is 50,000). Either request a smaller area, or use planet.osm")
157 if node_ids.length == 0
158 render :text => '<osm></osm>'
164 if node_ids.length > 0
165 node_ids_sql = "(#{node_ids.join(',')})"
166 # get the referenced segments
167 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})"
169 # see if we have any missing nodes
170 segments_nodes = segments.collect {|segment| segment.node_a }
171 segments_nodes += segments.collect {|segment| segment.node_b }
175 missing_nodes = segments_nodes - node_ids
177 # get missing nodes if there are any
178 nodes += Node.find(missing_nodes) if missing_nodes.length > 0
180 doc = OSM::API.new.get_xml_doc
183 # find which ways are needed
184 segment_ids = segments.collect {|segment| segment.id }
186 if segment_ids.length > 0
187 way_segments = WaySegment.find_all_by_segment_id(segment_ids)
188 way_ids = way_segments.collect {|way_segment| way_segment.id }
189 ways = Way.find(way_ids) # NB: doesn't pick up segments, tags from db until accessed via way.way_segments etc.
191 # seg_ids = way_segments.collect {|way_segment| way_segment.segment_id }
193 list_of_way_segs = ways.collect {|way| way.way_segments}
194 list_of_way_segs.flatten!
196 list_of_way_segments = list_of_way_segs.collect { |way_seg| way_seg.segment_id }
200 # - [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
201 segments_to_fetch = (list_of_way_segments.uniq - segment_ids) - [0]
203 if segments_to_fetch.length > 0
204 segments += Segment.find(segments_to_fetch)
210 segments_nodes = segments.collect {|segment| segment.node_a }
211 segments_nodes += segments.collect {|segment| segment.node_b }
213 node_ids_a = nodes.collect {|node| node.id }
215 nodes_to_get = segments_nodes - node_ids_a
216 nodes += Node.find(nodes_to_get) if nodes_to_get.length > 0
219 user_display_name_cache = {}
223 doc.root << node.to_xml_node(user_display_name_cache)
224 visible_nodes[node.id] = node
228 visible_segments = {}
230 segments.each do |segment|
231 if visible_nodes[segment.node_a] and visible_nodes[segment.node_b] and segment.visible?
232 doc.root << segment.to_xml_node(user_display_name_cache)
233 visible_segments[segment.id] = segment
238 doc.root << way.to_xml_node(visible_segments, user_display_name_cache) if way.visible?
241 render :text => doc.to_s
243 #exit when we have too many requests
244 if @@count > MAX_COUNT