X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/dcad29dad0d29e22ffa0c34a8d9b43cbf5d64f12..d887252eeb49f905a979c21f2559c85d9a0455bd:/app/controllers/api_controller.rb diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb index 1804ceb49..735e1bd59 100644 --- a/app/controllers/api_controller.rb +++ b/app/controllers/api_controller.rb @@ -1,250 +1,105 @@ class ApiController < ApplicationController - - 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 - #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 => ['latitude BETWEEN ? AND ? AND longitude BETWEEN ? AND ?', min_lat.to_i, max_lat.to_i, min_lon.to_i, max_lon.to_i], :select => "DISTINCT *", :offset => offset, :limit => TRACEPOINTS_PER_PAGE, :order => "timestamp DESC" ) - - doc = XML::Document.new - 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, :content_type => "text/xml" - @@count = COUNT - exit! - end - - render :text => doc.to_s, :content_type => "text/xml" - - end - + skip_before_action :verify_authenticity_token + before_action :api_deny_access_handler + + authorize_resource :class => false + + before_action :check_api_readable + around_action :api_call_handle_error, :api_call_timeout + + # This is probably the most common call of all. It is used for getting the + # OSM data for a specified bounding box, usually for editing. First the + # bounding box (bbox) is checked to make sure that it is sane. All nodes + # are searched, then all the ways that reference those nodes are found. + # All Nodes that are referenced by those ways are fetched and added to the list + # of nodes. + # Then all the relations that reference the already found nodes and ways are + # fetched. All the nodes and ways that are referenced by those ways are then + # fetched. Finally all the xml is returned. 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") + # check boundary is sane and area within defined + # see /config/application.yml + begin + bbox = BoundingBox.from_bbox_params(params) + bbox.check_boundaries + bbox.check_size + rescue StandardError => err + report_error(err.message) 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 + nodes = Node.bbox(bbox).where(:visible => true).includes(:node_tags).limit(MAX_NUMBER_OF_NODES + 1) - if node_ids.length == 0 - render :text => "", :content_type => "text/xml" + node_ids = nodes.collect(&:id) + if node_ids.length > MAX_NUMBER_OF_NODES + report_error("You requested too many nodes (limit is #{MAX_NUMBER_OF_NODES}). Either request a smaller area, or use planet.osm") 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 + # add bounds + doc.root << bbox.add_bounds_to(XML::Node.new("bounds")) + # 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) + ways = [] + if node_ids.empty? + list_of_way_nodes = [] + else + way_nodes = WayNode.where(:node_id => node_ids) + way_ids = way_nodes.collect { |way_node| way_node.id[0] } + ways = Way.preload(:way_nodes, :way_tags).find(way_ids) + + list_of_way_nodes = ways.collect do |way| + way.way_nodes.collect(&:node_id) + end + list_of_way_nodes.flatten! 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 } + # - [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] - nodes_to_get = segments_nodes - node_ids_a - nodes += Node.find(nodes_to_get) if nodes_to_get.length > 0 + nodes += Node.includes(:node_tags).find(nodes_to_fetch) unless nodes_to_fetch.empty? visible_nodes = {} + changeset_cache = {} user_display_name_cache = {} nodes.each do |node| if node.visible? - doc.root << node.to_xml_node(user_display_name_cache) + doc.root << node.to_xml_node(changeset_cache, 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 + way_ids = [] + ways.each do |way| + if way.visible? + doc.root << way.to_xml_node(visible_nodes, changeset_cache, user_display_name_cache) + way_ids << way.id 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" - - #exit when we have too many requests - if @@count > MAX_COUNT - @@count = COUNT - - exit! + relations = Relation.nodes(visible_nodes.keys).visible + + Relation.ways(way_ids).visible + + # 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) + relations += Relation.relations(relations.collect(&:id)).visible + + # 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(changeset_cache, user_display_name_cache) end + response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\"" + + render :xml => doc.to_s end end