class ApiController < ApplicationController
- before_filter :authorize
+ session :off
after_filter :compress_output
- helper :user
- model :user
-
- #COUNT is the number of map requests to allow before exiting and stating a new process
+ #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
- def map
+
+ # 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
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])
+ # 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" )
- node_ids = nodes.collect {|node| node.id }
+ 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
- # (in the future, we may wish to abort here if we found too many nodes)
+ track = XML::Node.new 'trk'
+ doc.root << track
- # 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})"
+ 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
- # 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!
+ render :text => doc.to_s, :content_type => "text/xml"
+
+ end
+
+ def map
+ GC.start
+ @@count+=1
- missing_nodes = segments_nodes - node_ids
+ # 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
- # get missing nodes if there are any
- nodes += Node.find(missing_nodes) if missing_nodes.length > 0
+ 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")
+ return
+ end
+
+ if node_ids.length == 0
+ render :text => "<osm version='0.5'></osm>", :content_type => "text/xml"
+ return
+ end
+
+ relations = Array.new
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.
+ 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 }
+ 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
+ # collect relationships. currently done in one big block at the end;
+ # may need to move this upwards if people want automatic completion of
+ # relationships, i.e. deliver referenced objects like we do with ways...
+ relations = Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+ "e.visible=1 and " +
+ "em.id = e.id and em.member_type='node' and em.member_id in (#{visible_nodes.keys.join(',')})")
+ relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+ "e.visible=1 and " +
+ "em.id = e.id and em.member_type='way' and em.member_id in (#{way_ids.join(',')})")
+ # 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)
+ relation_ids = relations.collect { |relation| relation.id }
+ if relation_ids.length > 0
+ relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
+ "e.visible=1 and " +
+ "em.id = e.id and em.member_type='relation' and em.member_id in (#{relation_ids.join(',')})")
+ end
+
+ # 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
+
+ render :text => doc.to_s, :content_type => "text/xml"
+
#exit when we have too many requests
if @@count > MAX_COUNT
- render :text => doc.to_s
@@count = COUNT
- exit
+
+ exit!
end
+ end
+
+ def capabilities
+ doc = OSM::API.new.get_xml_doc
- render :text => doc.to_s
+ api = XML::Node.new 'api'
+ version = XML::Node.new 'version'
+ version['minimum'] = '0.5';
+ version['maximum'] = '0.5';
+ api << version
+ area = XML::Node.new 'area'
+ area['maximum'] = MAX_REQUEST_AREA.to_s;
+ api << area
+
+ doc.root << api
+ render :text => doc.to_s, :content_type => "text/xml"
end
end
projects / rails.git / blobdiff