X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/2e2956d126908f74568878d6456412a48d259c58..8f57efe850bf9805d9bfb073d16d4cf1d06882f5:/app/controllers/api_controller.rb diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb index 36ce88acd..7e1b06a8d 100644 --- a/app/controllers/api_controller.rb +++ b/app/controllers/api_controller.rb @@ -1,275 +1,205 @@ class ApiController < ApplicationController + skip_before_action :verify_authenticity_token + + 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 + + # 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 + 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 - session :off - before_filter :check_read_availability, :except => [:capabilities] - after_filter :compress_output - - # Help methods for checking boundary sanity and area size - include MapBoundary - - #COUNT is the number of map requests to allow before exiting and starting a new process - @@count = COUNT - - # The maximum area you're allowed to request, in square degrees - MAX_REQUEST_AREA = 0.25 - - # Number of GPS trace/trackpoints returned per-page - TRACEPOINTS_PER_PAGE = 5000 - - - def trackpoints - @@count+=1 - #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 - report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat") - return - end - - bbox = bbox.split(',') - min_lon, min_lat, max_lon, max_lat = sanitise_boundaries(bbox) - # check boundary is sane and area within defined - # see /config/application.yml - begin - check_boundaries(min_lon, min_lat, max_lon, max_lat) - rescue Exception => err - report_error(err.message) - return - end - - # get all the points - points = Tracepoint.find_by_area(min_lat, min_lon, max_lat, max_lon, :offset => offset, :limit => TRACEPOINTS_PER_PAGE, :order => "timestamp DESC" ) - - 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 - - track = XML::Node.new 'trk' - doc.root << track - - 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! + request.formats = formats.compact end - - render :text => doc.to_s, :content_type => "text/xml" - end - def map - GC.start - @@count+=1 - # Figure out the bbox - bbox = params['bbox'] - - unless bbox and bbox.count(',') == 3 - # alternatively: report_error(TEXT['boundary_parameter_required'] - report_error("The parameter bbox is required, and must be of the form min_lon,min_lat,max_lon,max_lat") - return - end - - bbox = bbox.split(',') - - min_lon, min_lat, max_lon, max_lat = sanitise_boundaries(bbox) - - # check boundary is sane and area within defined - # see /config/application.yml - begin - check_boundaries(min_lon, min_lat, max_lon, max_lat) - rescue Exception => err - report_error(err.message) - return - end - - @nodes = Node.find_by_area(min_lat, min_lon, max_lat, max_lon, :conditions => "visible = 1", :limit => APP_CONFIG['max_number_of_nodes']+1) - # get all the nodes, by tag not yet working, waiting for change from NickB - # need to be @nodes (instance var) so tests in /spec can be performed - #@nodes = Node.search(bbox, params[:tag]) + 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 - node_ids = @nodes.collect(&:id) - if node_ids.length > APP_CONFIG['max_number_of_nodes'] - 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 => "", :content_type => "text/xml" - return + false end + end - relations = Array.new - - doc = OSM::API.new.get_xml_doc - - # get ways - # find which ways are needed - ways = Array.new - 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[0] } - 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! - + 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 - list_of_way_nodes = Array.new + ApiAbility.new(current_user) end + 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.find(nodes_to_fetch) + 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 + render :plain => errormessage, :status => :forbidden end + end - visible_nodes = {} - user_display_name_cache = {} + def gpx_status + status = database_status + status = "offline" if status == "online" && Settings.status == "gpx_offline" + status + end - @nodes.each do |node| - if node.visible? - doc.root << node.to_xml_node(user_display_name_cache) - visible_nodes[node.id] = node + ## + # 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 + + # 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 - end - way_ids = Array.new - ways.each do |way| - if way.visible? - doc.root << way.to_xml_node(visible_nodes, user_display_name_cache) - way_ids << way.id + # 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 - - # 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 = Array.new - if visible_nodes.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='node' and em.member_id in (#{visible_nodes.keys.join(',')})") - end - if way_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='way' and em.member_id in (#{way_ids.join(',')})") - 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) - 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 - @@count = COUNT - - exit! end end - def changes - zoom = (params[:zoom] || '12').to_i - - if params.include?(:start) and params.include?(:end) - starttime = Time.parse(params[:start]) - endtime = Time.parse(params[:end]) - else - hours = (params[:hours] || '1').to_i.hours - endtime = Time.now - starttime = endtime - hours - end - - if zoom >= 1 and zoom <= 16 and - endtime >= starttime and endtime - starttime <= 24.hours - mask = (1 << zoom) - 1 - - tiles = Node.count(:conditions => ["timestamp BETWEEN ? AND ?", starttime, endtime], - :group => "maptile_for_point(latitude, longitude, #{zoom})") - - 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 - - changes << t - end + 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 - doc.root << changes + ## + # 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 - render :text => doc.to_s, :content_type => "text/xml" + ## + # wrap an api call in a timeout + def api_call_timeout(&block) + Timeout.timeout(Settings.api_timeout, Timeout::Error, &block) + rescue ActionView::Template::Error => e + e = e.cause + + if e.is_a?(Timeout::Error) || + (e.is_a?(ActiveRecord::StatementInvalid) && e.message.include?("execution expired")) + ActiveRecord::Base.connection.raw_connection.cancel + raise OSM::APITimeoutError else - render :nothing => true, :status => :bad_request + raise end + rescue Timeout::Error + ActiveRecord::Base.connection.raw_connection.cancel + raise OSM::APITimeoutError end - def capabilities - doc = OSM::API.new.get_xml_doc - - 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 + ## + # check the api change rate limit + def check_rate_limit(new_changes = 1) + max_changes = ActiveRecord::Base.connection.select_value( + "SELECT api_rate_limit($1)", "api_rate_limit", [current_user.id] + ) - render :text => doc.to_s, :content_type => "text/xml" + raise OSM::APIRateLimitExceeded if new_changes > max_changes end end