X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/8bd09c082897d808c4641f94836f5cfa4cbbf95c..afcb345014d98914cd4f5d6b14ca2e30feac194c:/app/controllers/api_controller.rb diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb index 7451a91b9..f0ba32568 100644 --- a/app/controllers/api_controller.rb +++ b/app/controllers/api_controller.rb @@ -1,105 +1,292 @@ class ApiController < ApplicationController - before_filter :authorize + session :off + before_filter :check_read_availability, :except => [:capabilities] after_filter :compress_output - helper :user - model :user + # Help methods for checking boundary sanity and area size + include MapBoundary + + #COUNT is the number of map requests to allow before exiting and starting a new process + @@count = COUNT - def authorize_web - @current_user = User.find_by_token(session[:token]) - end - # The maximum area you're allowed to request, in square degrees - MAX_REQUEST_AREA = 0.25 + MAX_REQUEST_AREA = APP_CONFIG['max_request_area'] + + # Number of GPS trace/trackpoints returned per-page + TRACEPOINTS_PER_PAGE = APP_CONFIG['tracepoints_per_page'] + + # Get an XML response containing a list of tracepoints that have been uploaded + # within the specified bounding box, and in the specified page. + 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 - def map - 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") + 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") + min_lon, min_lat, max_lon, max_lat = sanitise_boundaries(bbox) + # check boundary is sane and area within defined + # see /config/application.yml + begin + check_boundaries(min_lon, min_lat, max_lon, max_lat) + rescue Exception => err + report_error(err.message) return end - unless min_lat <= max_lat - report_error("The minimum latitude must be less than the maximum latitude, but it wasn't") - return + + # get all the points + points = Tracepoint.find_by_area(min_lat, min_lon, max_lat, max_lon, :offset => offset, :limit => TRACEPOINTS_PER_PAGE, :order => "timestamp DESC" ) + + doc = XML::Document.new + doc.encoding = XML::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 - 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 + #exit when we have too many requests + if @@count > MAX_COUNT + render :text => doc.to_s, :content_type => "text/xml" + @@count = COUNT + exit! 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]) + response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\"" - node_ids = nodes.collect {|node| node.id } + render :text => doc.to_s, :content_type => "text/xml" + end - # (in the future, we may wish to abort here if we found too many nodes) + # 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'] - # 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})" + unless bbox and bbox.count(',') == 3 + # alternatively: report_error(TEXT['boundary_parameter_required'] + report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat") + return 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! + bbox = bbox.split(',') + + min_lon, min_lat, max_lon, max_lat = sanitise_boundaries(bbox) + + # check boundary is sane and area within defined + # see /config/application.yml + begin + check_boundaries(min_lon, min_lat, max_lon, max_lat) + rescue Exception => err + report_error(err.message) + return + end - missing_nodes = segments_nodes - node_ids + # FIXME um why is this area using a different order for the lat/lon from above??? + @nodes = Node.find_by_area(min_lat, min_lon, max_lat, max_lon, :conditions => {:visible => true}, :limit => APP_CONFIG['max_number_of_nodes']+1) + # get all the nodes, by tag not yet working, waiting for change from NickB + # need to be @nodes (instance var) so tests in /spec can be performed + #@nodes = Node.search(bbox, params[:tag]) - # get missing nodes if there are any - nodes += Node.find(missing_nodes) if missing_nodes.length > 0 + node_ids = @nodes.collect(&:id) + if node_ids.length > APP_CONFIG['max_number_of_nodes'] + report_error("You requested too many nodes (limit is #{APP_CONFIG['max_number_of_nodes']}). Either request a smaller area, or use planet.osm") + return + end + if node_ids.length == 0 + render :text => "", :content_type => "text/xml" + return + end doc = OSM::API.new.get_xml_doc + # add bounds + bounds = XML::Node.new 'bounds' + bounds['minlat'] = min_lat.to_s + bounds['minlon'] = min_lon.to_s + bounds['maxlat'] = max_lat.to_s + bounds['maxlon'] = max_lon.to_s + doc.root << 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. + if node_ids.length > 0 + way_nodes = WayNode.find_all_by_node_id(node_ids) + way_ids = way_nodes.collect { |way_node| way_node.id[0] } + ways = Way.find(way_ids) + + list_of_way_nodes = ways.collect { |way| + way.way_nodes.collect { |way_node| way_node.node_id } + } + list_of_way_nodes.flatten! + + else + list_of_way_nodes = Array.new end - nodes.each do |node| - doc.root << node.to_xml_node() + # - [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] + + if nodes_to_fetch.length > 0 + @nodes += Node.find(nodes_to_fetch) end - segments.each do |segment| - doc.root << segment.to_xml_node() - end + 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 + + way_ids = Array.new ways.each do |way| - doc.root << way.to_xml_node() + if way.visible? + doc.root << way.to_xml_node(visible_nodes, user_display_name_cache) + way_ids << way.id + end end - render :text => doc.to_s + relations = Relation.find_for_nodes(visible_nodes.keys, :conditions => {:visible => true}) + + Relation.find_for_ways(way_ids, :conditions => {:visible => true}) + + # 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.find_for_relations(relations.collect { |r| r.id }, :conditions => {:visible => true}) + + # 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(user_display_name_cache) + end + + response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\"" + + render :text => doc.to_s, :content_type => "text/xml" + + #exit when we have too many requests + if @@count > MAX_COUNT + @@count = COUNT + + exit! + end + end + + # Get a list of the tiles that have changed within a specified time + # period + def changes + zoom = (params[:zoom] || '12').to_i + + if params.include?(:start) and params.include?(:end) + starttime = Time.parse(params[:start]) + endtime = Time.parse(params[:end]) + else + hours = (params[:hours] || '1').to_i.hours + endtime = Time.now.getutc + starttime = endtime - hours + end + + if zoom >= 1 and zoom <= 16 and + endtime > starttime and endtime - starttime <= 24.hours + mask = (1 << zoom) - 1 + + tiles = Node.count(:conditions => ["timestamp BETWEEN ? AND ?", starttime, endtime], + :group => "maptile_for_point(latitude, longitude, #{zoom})") + + doc = OSM::API.new.get_xml_doc + changes = XML::Node.new 'changes' + changes["starttime"] = starttime.xmlschema + changes["endtime"] = endtime.xmlschema + + tiles.each do |tile, count| + x = (tile.to_i >> zoom) & mask + y = tile.to_i & mask + + t = XML::Node.new 'tile' + t["x"] = x.to_s + t["y"] = y.to_s + t["z"] = zoom.to_s + t["changes"] = count.to_s + + changes << t + end + + doc.root << changes + + render :text => doc.to_s, :content_type => "text/xml" + else + render :text => "Requested zoom is invalid, or the supplied start is after the end time, or the start duration is more than 24 hours", :status => :bad_request + end + end + + # External apps that use the api are able to query the api to find out some + # parameters of the API. It currently returns: + # * minimum and maximum API versions that can be used. + # * maximum area that can be requested in a bbox request in square degrees + # * number of tracepoints that are returned in each tracepoints page + def capabilities + doc = OSM::API.new.get_xml_doc + + api = XML::Node.new 'api' + version = XML::Node.new 'version' + version['minimum'] = "#{API_VERSION}"; + version['maximum'] = "#{API_VERSION}"; + api << version + area = XML::Node.new 'area' + area['maximum'] = MAX_REQUEST_AREA.to_s; + api << area + tracepoints = XML::Node.new 'tracepoints' + tracepoints['per_page'] = APP_CONFIG['tracepoints_per_page'].to_s + api << tracepoints + waynodes = XML::Node.new 'waynodes' + waynodes['maximum'] = APP_CONFIG['max_number_of_way_nodes'].to_s + api << waynodes + + doc.root << api + render :text => doc.to_s, :content_type => "text/xml" end end