class ApiController < ApplicationController
-
- before_filter :authorize
- after_filter :compress_output
-
- # The maximum area you're allowed to request, in square degrees
- MAX_REQUEST_AREA = 0.25
-
+ 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
- response.headers["Content-Type"] = 'application/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")
+ # 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
- bbox = bbox.split(',')
+ nodes = Node.bbox(bbox).where(:visible => true).includes(:node_tags).limit(MAX_NUMBER_OF_NODES + 1)
- 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")
+ 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
- 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 }
+ doc = OSM::API.new.get_xml_doc
- # (in the future, we may wish to abort here if we found too many nodes)
+ # add bounds
+ doc.root << bbox.add_bounds_to(XML::Node.new("bounds"))
- # 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})"
+ # get ways
+ # find which ways are needed
+ 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
- # 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
+ # - [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]
- # get missing nodes if there are any
- nodes += Node.find(missing_nodes) if missing_nodes.length > 0
+ nodes += Node.includes(:node_tags).find(nodes_to_fetch) unless nodes_to_fetch.empty?
- doc = OSM::API.get_xml_doc
+ visible_nodes = {}
+ changeset_cache = {}
+ user_display_name_cache = {}
- # 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.
+ nodes.each do |node|
+ if node.visible?
+ doc.root << node.to_xml_node(changeset_cache, user_display_name_cache)
+ visible_nodes[node.id] = node
+ end
end
- nodes.each do |node|
- doc.root << node.to_xml_node()
+ 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
- segments.each do |segment|
- doc.root << segment.to_xml_node()
- end
+ relations = Relation.nodes(visible_nodes.keys).visible +
+ Relation.ways(way_ids).visible
- ways.each do |way|
- doc.root << way.to_xml_node()
- end
+ # 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
- render :text => doc.to_s
+ response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\""
+ render :xml => doc.to_s
end
end
projects / rails.git / blobdiff