X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/b446138aefb04799cc1253886335ced16e546517..7a85ce0c12cf4d75561c35e2ff28e718a390d622:/app/controllers/api_controller.rb diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb index 021ada0cd..a2d016c8c 100644 --- a/app/controllers/api_controller.rb +++ b/app/controllers/api_controller.rb @@ -1,312 +1,185 @@ 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 - # 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 - - 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 - # 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 - - # get all the points - points = Tracepoint.bbox(bbox).offset(offset).limit(TRACEPOINTS_PER_PAGE).order("gpx_id DESC, trackid ASC, timestamp ASC") - - 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 - - # 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 => "traces", :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 + private + + ## + # Set allowed request formats if no explicit format has been + # requested via a URL suffix. Allowed formats are taken from + # any HTTP Accept header with XML as the default. + def set_request_formats + unless params[:format] + accept_header = request.headers["HTTP_ACCEPT"] + + if accept_header + # Some clients (such asJOSM) send Accept headers which cannot be + # parse by Rails, for example: + # + # Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2 + # + # where both "*" and ".2" as a quality do not adhere to the syntax + # described in RFC 7231, section 5.3.1, etc. + # + # As a workaround, and for back compatibility, default to XML format. + mimetypes = begin + Mime::Type.parse(accept_header) + rescue Mime::Type::InvalidMimeType + Array(Mime[:xml]) 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 + # Allow XML and JSON formats, and treat an all formats wildcard + # as XML for backwards compatibility - all other formats are discarded + # which will result in a 406 Not Acceptable response being sent + formats = mimetypes.map do |mime| + if mime.symbol == :xml || mime == "*/*" then :xml + elsif mime.symbol == :json then :json end - trkseg = anon_trkseg end + else + # Default to XML if no accept header was sent - this includes + # the unit tests which don't set one by default + formats = Array(:xml) end - trkseg << point.to_xml_node(timestamps) + request.formats = formats.compact end - - response.headers["Content-Disposition"] = "attachment; filename=\"tracks.gpx\"" - - render :xml => doc.to_s 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 - - 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 - - doc = OSM::API.new.get_xml_doc - - # add bounds - doc.root << bbox.add_bounds_to(XML::Node.new("bounds")) - - # 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) + def authorize(realm = "Web Password", errormessage = "Couldn't authenticate you") + # make the current_user object from any auth sources we have + setup_user_auth + + # handle authenticate pass/fail + unless current_user + # no auth, the user does not exist or the password was wrong + if Settings.basic_auth_support + response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\"" + render :plain => errormessage, :status => :unauthorized + else + render :plain => errormessage, :status => :forbidden end - list_of_way_nodes.flatten! - 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] - - nodes += Node.includes(:node_tags).find(nodes_to_fetch) unless nodes_to_fetch.empty? - - visible_nodes = {} - changeset_cache = {} - user_display_name_cache = {} - - 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 - - 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 + false 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) + def current_ability + # Use capabilities from the oauth token if it exists and is a valid access token + if doorkeeper_token&.accessible? + ApiAbility.new(nil).merge(ApiCapability.new(doorkeeper_token)) + elsif Authenticator.new(self, [:token]).allow? + ApiAbility.new(nil).merge(ApiCapability.new(current_token)) + else + ApiAbility.new(current_user) end - - response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\"" - - render :xml => doc.to_s 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]) + def deny_access(_exception) + if doorkeeper_token || current_token + set_locale + report_error t("oauth.permissions.missing"), :forbidden + elsif current_user + head :forbidden + elsif Settings.basic_auth_support + realm = "Web Password" + errormessage = "Couldn't authenticate you" + response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\"" + render :plain => errormessage, :status => :unauthorized else - hours = (params[:hours] || "1").to_i.hours - endtime = Time.now.getutc - starttime = endtime - hours + render :plain => errormessage, :status => :forbidden end + end - if zoom >= 1 && zoom <= 16 && - endtime > starttime && endtime - starttime <= 24.hours - mask = (1 << zoom) - 1 - - 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 + def gpx_status + status = database_status + status = "offline" if status == "online" && Settings.status == "gpx_offline" + status + end - 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 + ## + # sets up the current_user for use by other methods. this is mostly called + # from the authorize method, but can be called elsewhere if authorisation + # is optional. + def setup_user_auth + logger.info " setup_user_auth" + # try and setup using OAuth + if doorkeeper_token&.accessible? + self.current_user = User.find(doorkeeper_token.resource_owner_id) + elsif Authenticator.new(self, [:token]).allow? + # self.current_user setup by OAuth + elsif Settings.basic_auth_support + username, passwd = auth_data # parse from headers + # authenticate per-scheme + self.current_user = if username.nil? + nil # no authentication provided - perhaps first connect (client should retry after 401) + elsif username == "token" + User.authenticate(:token => passwd) # preferred - random token for user from db, passed in basic auth + else + User.authenticate(:username => username, :password => passwd) # basic auth + end + # log if we have authenticated using basic auth + logger.info "Authenticated as user #{current_user.id} using basic authentication" if current_user + end - changes << t + # have we identified the user? + if current_user + # check if the user has been banned + user_block = current_user.blocks.active.take + unless user_block.nil? + set_locale + if user_block.zero_hour? + report_error t("application.setup_user_auth.blocked_zero_hour"), :forbidden + else + report_error t("application.setup_user_auth.blocked"), :forbidden + end end - doc.root << changes - - render :xml => doc.to_s - else - render :plain => "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 + # if the user hasn't seen the contributor terms then don't + # allow editing - they have to go to the web site and see + # (but can decline) the CTs to continue. + if !current_user.terms_seen && flash[:skip_terms].nil? + set_locale + report_error t("application.setup_user_auth.need_to_see_terms"), :forbidden + end 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.to_s - version["maximum"] = API_VERSION.to_s - api << version - area = XML::Node.new "area" - area["maximum"] = MAX_REQUEST_AREA.to_s - api << area - notearea = XML::Node.new "note_area" - notearea["maximum"] = MAX_NOTE_REQUEST_AREA.to_s - api << notearea - 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 + def api_call_handle_error + yield + rescue ActionController::UnknownFormat + head :not_acceptable + rescue ActiveRecord::RecordNotFound => e + head :not_found + rescue LibXML::XML::Error, ArgumentError => e + report_error e.message, :bad_request + rescue ActiveRecord::RecordInvalid => e + message = "#{e.record.class} #{e.record.id}: " + e.record.errors.each { |error| message << "#{error.attribute}: #{error.message} (#{e.record[error.attribute].inspect})" } + report_error message, :bad_request + rescue OSM::APIError => e + report_error e.message, e.status + rescue AbstractController::ActionNotFound => e + raise + rescue StandardError => e + logger.info("API threw unexpected #{e.class} exception: #{e.message}") + e.backtrace.each { |l| logger.info(l) } + report_error "#{e.class}: #{e.message}", :internal_server_error + end - render :xml => doc.to_s + ## + # asserts that the request method is the +method+ given as a parameter + # or raises a suitable error. +method+ should be a symbol, e.g: :put or :get. + def assert_method(method) + ok = request.send(:"#{method.to_s.downcase}?") + raise OSM::APIBadMethodError, method unless ok 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 = if current_token.present? - ClientApplication.all_permissions.select { |p| current_token.read_attribute(p) } - elsif current_user - ClientApplication.all_permissions - else - [] - end + ## + # wrap an api call in a timeout + def api_call_timeout(&block) + Timeout.timeout(Settings.api_timeout, Timeout::Error, &block) + rescue Timeout::Error + ActiveRecord::Base.connection.raw_connection.cancel + raise OSM::APITimeoutError end end