X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/1733e8990a242d7d4b3834b7cec2118597d685bd..fe77d0daa1047767e374494063073d46a059f0b2:/app/controllers/api_controller.rb diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb index 976c8bd03..379bb7e86 100644 --- a/app/controllers/api_controller.rb +++ b/app/controllers/api_controller.rb @@ -1,98 +1,313 @@ class ApiController < ApplicationController + skip_before_action :verify_authenticity_token + before_action :check_api_readable, :except => [:capabilities] + before_action :setup_user_auth, :only => [:permissions] + around_action :api_call_handle_error, :api_call_timeout - before_filter :authorize - after_filter :compress_output + # 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 + # retrieve the page number + page = params["page"].to_s.to_i - # The maximum area you're allowed to request, in square degrees - MAX_REQUEST_AREA = 0.25 + 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"] = '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(',') + # get all the points + points = Tracepoint.bbox(bbox).offset(offset).limit(TRACEPOINTS_PER_PAGE).order("gpx_id DESC, trackid ASC, timestamp ASC") - min_lon = bbox[0].to_f - min_lat = bbox[1].to_f - max_lon = bbox[2].to_f - max_lat = bbox[3].to_f + 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" - # 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 + doc.root = root + + # initialise these variables outside of the loop so that they + # stay in scope and don't get free'd up by the GC during the + # loop. + gpx_id = -1 + trackid = -1 + track = nil + trkseg = nil + anon_track = nil + anon_trkseg = nil + gpx_file = nil + timestamps = false + + points.each do |point| + if gpx_id != point.gpx_id + gpx_id = point.gpx_id + trackid = -1 + gpx_file = Trace.find(gpx_id) + + if gpx_file.trackable? + track = XML::Node.new "trk" + doc.root << track + timestamps = true + + if gpx_file.identifiable? + track << (XML::Node.new("name") << gpx_file.name) + track << (XML::Node.new("desc") << gpx_file.description) + track << (XML::Node.new("url") << url_for(:controller => "trace", :action => "view", :display_name => gpx_file.user.display_name, :id => gpx_file.id)) + end + else + # use the anonymous track segment if the user hasn't allowed + # their GPX points to be tracked. + timestamps = false + if anon_track.nil? + anon_track = XML::Node.new "trk" + doc.root << anon_track + end + track = anon_track + end + end + + if trackid != point.trackid + if gpx_file.trackable? + trkseg = XML::Node.new "trkseg" + track << trkseg + trackid = point.trackid + else + if anon_trkseg.nil? + anon_trkseg = XML::Node.new "trkseg" + anon_track << anon_trkseg + end + trkseg = anon_trkseg + end + end + + trkseg << point.to_xml_node(timestamps) end - unless min_lat <= max_lat - report_error("The minimum latitude must be less than the maximum latitude, but it wasn't") + + response.headers["Content-Disposition"] = "attachment; filename=\"tracks.gpx\"" + + render :text => doc.to_s, :content_type => "text/xml" + end + + # 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 + # 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 - 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") + nodes = Node.bbox(bbox).where(:visible => true).includes(:node_tags).limit(MAX_NUMBER_OF_NODES + 1) + + 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]) - - 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 + # get ways + # find which ways are needed + ways = [] 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})" + 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! + + else + list_of_way_nodes = [] + end + + # - [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.includes(:node_tags).find(nodes_to_fetch) 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! + visible_nodes = {} + changeset_cache = {} + user_display_name_cache = {} - missing_nodes = segments_nodes - node_ids + 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 - # get missing nodes if there are any - nodes += Node.find(missing_nodes) if missing_nodes.length > 0 + 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 - doc = OSM::API.get_xml_doc + relations = Relation.nodes(visible_nodes.keys).visible + + Relation.ways(way_ids).visible - # 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. + # 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(nil, changeset_cache, user_display_name_cache) end - nodes.each do |node| - doc.root << node.to_xml_node() + response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\"" + + render :text => doc.to_s, :content_type => "text/xml" + 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) && 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 - segments.each do |segment| - doc.root << segment.to_xml_node() - end + if zoom >= 1 && zoom <= 16 && + endtime > starttime && endtime - starttime <= 24.hours + mask = (1 << zoom) - 1 - ways.each do |way| - doc.root << way.to_xml_node() - end + tiles = Node.where(:timestamp => starttime..endtime).group("maptile_for_point(latitude, longitude, #{zoom})").count + + 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 - render :text => doc.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"] = TRACEPOINTS_PER_PAGE.to_s + api << tracepoints + waynodes = XML::Node.new "waynodes" + waynodes["maximum"] = MAX_NUMBER_OF_WAY_NODES.to_s + api << waynodes + changesets = XML::Node.new "changesets" + changesets["maximum_elements"] = Changeset::MAX_ELEMENTS.to_s + api << changesets + timeout = XML::Node.new "timeout" + timeout["seconds"] = API_TIMEOUT.to_s + api << timeout + status = XML::Node.new "status" + status["database"] = database_status.to_s + status["api"] = api_status.to_s + status["gpx"] = gpx_status.to_s + api << status + doc.root << api + policy = XML::Node.new "policy" + blacklist = XML::Node.new "imagery" + IMAGERY_BLACKLIST.each do |url_regex| + xnd = XML::Node.new "blacklist" + xnd["regex"] = url_regex.to_s + blacklist << xnd + end + policy << blacklist + doc.root << policy + + render :text => doc.to_s, :content_type => "text/xml" + end + # External apps that use the api are able to query which permissions + # they have. This currently returns a list of permissions granted to the current user: + # * if authenticated via OAuth, this list will contain all permissions granted by the user to the access_token. + # * if authenticated via basic auth all permissions are granted, so the list will contain all permissions. + # * unauthenticated users have no permissions, so the list will be empty. + def permissions + @permissions = case + when current_token.present? + ClientApplication.all_permissions.select { |p| current_token.read_attribute(p) } + when @user + ClientApplication.all_permissions + else + [] + end end end