class ApiController < ApplicationController
+ 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
# Figure out the bbox
- bbox = params['bbox']
- unless bbox and bbox.count(',') == 3
- render :nothing => true, :status => 400
+ # 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
+ 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
- # 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])
+ doc = OSM::API.new.get_xml_doc
- node_ids = nodes.collect {|node| node.id }
- node_ids_sql = "(#{node_ids.join(',')})"
+ # add bounds
+ doc.root << bbox.add_bounds_to(XML::Node.new("bounds"))
- # get the referenced segments
- segments = Segment.find_by_sql "select * from segments where 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)
- # see if we have nay missing nodes
- segments_nodes = segments.collect {|segment| segment.node_a }
- segments_nodes += segments.collect {|segment| segment.node_b }
+ list_of_way_nodes = ways.collect do |way|
+ way.way_nodes.collect(&:node_id)
+ end
+ list_of_way_nodes.flatten!
+ end
- segments_nodes.uniq!
+ # - [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]
- missing_nodes = segments_nodes - node_ids
+ nodes += Node.includes(:node_tags).find(nodes_to_fetch) unless nodes_to_fetch.empty?
- # get missing nodes if there are any
- nodes += Node.find(missing_nodes) if missing_nodes.length > 0
+ visible_nodes = {}
+ changeset_cache = {}
+ user_display_name_cache = {}
- doc = XML::Document.new
- doc.encoding = 'UTF-8'
- root = XML::Node.new 'osm'
- root['version'] = '0.4'
- root['generator'] = 'OpenStreetMap server'
- doc.root = root
-
nodes.each do |node|
- root << node.to_xml_node()
+ if node.visible?
+ doc.root << node.to_xml_node(changeset_cache, user_display_name_cache)
+ visible_nodes[node.id] = node
+ end
end
- segments.each do |segment|
- root << segment.to_xml_node()
- end
+ 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
+
+ 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
- render :text => doc.to_s
+ response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\""
+ render :xml => doc.to_s
end
end
projects / rails.git / blobdiff