Prevent exceptions while reversing directions

[rails.git] / app / controllers / api_controller.rb

diff --git a/app/controllers/api_controller.rb b/app/controllers/api_controller.rb
index 2c442c190585d590647a7705aaff4a1319869278..44efdc0711f2cb39d53e8b59d33d58e8583dca5b 100644 (file)
--- a/app/controllers/api_controller.rb
+++ b/app/controllers/api_controller.rb
@@ -1,311 +1,88 @@
 class ApiController < ApplicationController
 class ApiController < ApplicationController

+  skip_before_action :verify_authenticity_token

 
 

-  skip_before_filter :verify_authenticity_token
-  before_filter :check_api_readable, :except => [:capabilities]
-  before_filter :setup_user_auth, :only => [:permissions]
-  after_filter :compress_output
-  around_filter :api_call_handle_error, :api_call_timeout
+  private

 
 

-  # 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
+  def authorize(realm = "Web Password", errormessage = "Couldn't authenticate you")
+    # make the current_user object from any auth sources we have
+    setup_user_auth

 
 

-    unless page >= 0
-        report_error("Page number must be greater than or equal to 0")
-        return
+    # handle authenticate pass/fail
+    unless current_user
+      # no auth, the user does not exist or the password was wrong
+      response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\""
+      render :plain => errormessage, :status => :unauthorized
+      false

     end
     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 Exception => 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 => '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
-
-    response.headers["Content-Disposition"] = "attachment; filename=\"tracks.gpx\""
-
-    render :text => doc.to_s, :content_type => "text/xml"

   end
 
   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 Exception => 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
-    if node_ids.length == 0
-      render :text => "<osm version='#{API_VERSION}' generator='#{GENERATOR}'></osm>", :content_type => "text/xml"
-      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 = Array.new
-    if node_ids.length > 0
-      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 { |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 Authenticator.new(self, [:token]).allow?
+      ApiAbility.new(nil).merge(ApiCapability.new(current_token))

     else
     else

-      list_of_way_nodes = Array.new
-    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)
+      ApiAbility.new(current_user)

     end
     end

-
-    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 = Array.new
-    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 { |r| r.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
-
-    response.headers["Content-Disposition"] = "attachment; filename=\"map.osm\""
-
-    render :text => doc.to_s, :content_type => "text/xml"

   end
 
   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) and params.include?(:end)
-      starttime = Time.parse(params[:start])
-      endtime = Time.parse(params[:end])
+  def deny_access(_exception)
+    if current_token
+      set_locale
+      report_error t("oauth.permissions.missing"), :forbidden
+    elsif current_user
+      head :forbidden

     else
     else

-      hours = (params[:hours] || '1').to_i.hours
-      endtime = Time.now.getutc
-      starttime = endtime - hours
+      realm = "Web Password"
+      errormessage = "Couldn't authenticate you"
+      response.headers["WWW-Authenticate"] = "Basic realm=\"#{realm}\""
+      render :plain => errormessage, :status => :unauthorized

     end
     end

+  end

 
 

-    if zoom >= 1 and zoom <= 16 and
-       endtime > starttime and 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
+    # try and setup using OAuth
+    unless Authenticator.new(self, [:token]).allow?
+      username, passwd = get_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
+    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
 
       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
+      # 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
     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
-
-    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
 end