X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/59cc0015f565e89327d83bbb3b0787e7c4270ed9..c11d961f624cb610c4b8184d24e522b2c093d1ea:/app/controllers/api_controller.rb diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb index 99afae672..4b785f8bc 100644 --- a/app/controllers/api_controller.rb +++ b/app/controllers/api_controller.rb @@ -1,27 +1,253 @@ class ApiController < ApplicationController - def map + before_filter :authorize + after_filter :compress_output + + helper :user + model :user + + #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 + response.headers["Content-Type"] = 'text/xml' + #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 + + # integerise + min_lat = min_lat * 1000000 + max_lat = max_lat * 1000000 + min_lon = min_lon * 1000000 + max_lon = max_lon * 1000000 + # get all the points + 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" ) 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 + 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 + @@count = COUNT + exit! + end + render :text => doc.to_s - - #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 + end + def map + GC.start + @@count+=1 + + response.headers["Content-Type"] = 'text/xml' + # 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 > ? AND longitude > ? AND latitude < ? AND longitude < ? AND visible = 1', min_lat, min_lon, max_lat, 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") + end + + if node_ids.length == 0 + render :text => "" + 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 + + #exit when we have too many requests + if @@count > MAX_COUNT + @@count = COUNT + + exit! + end + + end end