services/api/app/controllers/application_controller.rb

   1 class ApplicationController < ActionController::Base
   2   include CurrentApiClient
   3
   4   protect_from_forgery
   5   before_filter :uncamelcase_params_hash_keys
   6   around_filter :thread_with_auth_info, :except => [:render_error, :render_not_found]
   7
   8   before_filter :remote_ip
   9   before_filter :login_required, :except => :render_not_found
  10   before_filter :catch_redirect_hint
  11
  12   before_filter :find_objects_for_index, :only => :index
  13   before_filter :find_object_by_uuid, :except => [:index, :create]
  14
  15   attr_accessor :resource_attrs
  16
  17   def catch_redirect_hint
  18     if !current_user
  19       if params.has_key?('redirect_to') then
  20         session[:redirect_to] = params[:redirect_to]
  21       end
  22     end
  23   end
  24
  25   unless Rails.application.config.consider_all_requests_local
  26     rescue_from Exception,
  27     :with => :render_error
  28     rescue_from ActiveRecord::RecordNotFound,
  29     :with => :render_not_found
  30     rescue_from ActionController::RoutingError,
  31     :with => :render_not_found
  32     rescue_from ActionController::UnknownController,
  33     :with => :render_not_found
  34     rescue_from ActionController::UnknownAction,
  35     :with => :render_not_found
  36   end
  37
  38   def render_error(e)
  39     logger.error e.inspect
  40     logger.error e.backtrace.collect { |x| x + "\n" }.join('') if e.backtrace
  41     if @object and @object.errors and @object.errors.full_messages
  42       errors = @object.errors.full_messages
  43     else
  44       errors = [e.inspect]
  45     end
  46     render json: { errors: errors }, status: 422
  47   end
  48
  49   def render_not_found(e=ActionController::RoutingError.new("Path not found"))
  50     logger.error e.inspect
  51     render json: { errors: ["Path not found"] }, status: 404
  52   end
  53
  54   def find_objects_for_index
  55     uuid_list = [current_user.uuid, *current_user.groups_i_can(:read)]
  56     sanitized_uuid_list = uuid_list.
  57       collect { |uuid| model_class.sanitize(uuid) }.join(', ')
  58     @objects ||= model_class.
  59       joins("LEFT JOIN links permissions ON permissions.head_uuid=#{table_name}.owner AND permissions.tail_uuid in (#{sanitized_uuid_list}) AND permissions.link_class='permission'").
  60       where("?=? OR #{table_name}.owner in (?) OR #{table_name}.uuid=? OR permissions.head_uuid IS NOT NULL",
  61             true, current_user.is_admin,
  62             uuid_list,
  63             current_user.uuid)
  64     @where = params[:where] || {}
  65     @where = Oj.load(@where) if @where.is_a?(String)
  66     if params[:where]
  67       conditions = ['1=1']
  68       @where.each do |attr,value|
  69         if (!value.nil? and
  70             attr.to_s.match(/^[a-z][_a-z0-9]+$/) and
  71             model_class.columns.collect(&:name).index(attr))
  72           if value.is_a? Array
  73             conditions[0] << " and #{table_name}.#{attr} in (?)"
  74             conditions << value
  75           elsif value.is_a? String or value.is_a? Fixnum or value == true or value == false
  76             conditions[0] << " and #{table_name}.#{attr}=?"
  77             conditions << value
  78           elsif value.is_a? Hash
  79             # Not quite the same thing as "equal?" but better than nothing?
  80             value.each do |k,v|
  81               if v.is_a? String
  82                 conditions[0] << " and #{table_name}.#{attr} ilike ?"
  83                 conditions << "%#{k}%#{v}%"
  84               end
  85             end
  86           end
  87         elsif (!value.nil? and attr == 'any' and
  88           value.is_a?(Array) and value[0] == 'contains' and
  89           model_class.columns.collect(&:name).index('name')) then
  90             conditions[0] << " and #{table_name}.name ilike ?"
  91             conditions << "%#{value[1]}%"
  92         end
  93       end
  94       if conditions.length > 1
  95         conditions[0].sub!(/^1=1 and /, '')
  96         @objects = @objects.
  97           where(*conditions)
  98       end
  99     end
 100     if params[:limit]
 101       begin
 102         @objects = @objects.limit(params[:limit].to_i)
 103       rescue
 104         raise "invalid argument (limit)"
 105       end
 106     else
 107       @objects = @objects.limit(100)
 108     end
 109     @objects = @objects.order("#{table_name}.modified_at desc")
 110   end
 111
 112   def index
 113     @objects.uniq!(&:id)
 114     if params[:eager] and params[:eager] != '0' and params[:eager] != 0 and params[:eager] != ''
 115       @objects.each(&:eager_load_associations)
 116     end
 117     render_list
 118   end
 119
 120   def show
 121     if @object
 122       render json: @object.as_api_response(:superuser)
 123     else
 124       render_not_found("object not found")
 125     end
 126   end
 127
 128   def create
 129     @object = model_class.new resource_attrs
 130     @object.save
 131     show
 132   end
 133
 134   def update
 135     @object.update_attributes resource_attrs
 136     show
 137   end
 138
 139   def destroy
 140     @object.destroy
 141     show
 142   end
 143
 144   protected
 145
 146   def resource_attrs
 147     return @attrs if @attrs
 148     @attrs = params[resource_name]
 149     if @attrs.is_a? String
 150       @attrs = uncamelcase_hash_keys(Oj.load @attrs)
 151     end
 152     unless @attrs.is_a? Hash
 153       raise "no #{resource_name} (or #{resource_name.camelcase(:lower)}) hash provided with request #{params.inspect}"
 154     end
 155     %w(created_at modified_by_client modified_by_user modified_at).each do |x|
 156       @attrs.delete x
 157     end
 158     @attrs
 159   end
 160
 161   # Authentication
 162   def login_required
 163     if !current_user
 164       respond_to do |format|
 165         format.html  {
 166           redirect_to '/auth/joshid'
 167         }
 168         format.json {
 169           render :json => { errors: ['Not logged in'] }.to_json
 170         }
 171       end
 172     end
 173   end
 174
 175   def thread_with_auth_info
 176     begin
 177       user = nil
 178       api_client = nil
 179       api_client_auth = nil
 180       supplied_token = params[:api_token] || params[:oauth_token]
 181       if supplied_token
 182         api_client_auth = ApiClientAuthorization.
 183           includes(:api_client, :user).
 184           where('api_token=?', supplied_token).
 185           first
 186         if api_client_auth
 187           session[:user_id] = api_client_auth.user.id
 188           session[:api_client_uuid] = api_client_auth.api_client.uuid
 189           session[:api_client_authorization_id] = api_client_auth.id
 190           user = api_client_auth.user
 191           api_client = api_client_auth.api_client
 192         end
 193       elsif session[:user_id]
 194         user = User.find(session[:user_id]) rescue nil
 195         api_client = ApiClient.
 196           where('uuid=?',session[:api_client_uuid]).
 197           first rescue nil
 198         if session[:api_client_authorization_id] then
 199           api_client_auth = ApiClientAuthorization.
 200             find session[:api_client_authorization_id]
 201         end
 202       end
 203       Thread.current[:api_client_trusted] = session[:api_client_trusted]
 204       Thread.current[:api_client_ip_address] = remote_ip
 205       Thread.current[:api_client_authorization] = api_client_auth
 206       Thread.current[:api_client_uuid] = api_client && api_client.uuid
 207       Thread.current[:api_client] = api_client
 208       Thread.current[:user] = user
 209       yield
 210     ensure
 211       Thread.current[:api_client_trusted] = nil
 212       Thread.current[:api_client_ip_address] = nil
 213       Thread.current[:api_client_authorization] = nil
 214       Thread.current[:api_client_uuid] = nil
 215       Thread.current[:api_client] = nil
 216       Thread.current[:user] = nil
 217     end
 218   end
 219   # /Authentication
 220
 221   def model_class
 222     controller_name.classify.constantize
 223   end
 224
 225   def resource_name             # params[] key used by client
 226     controller_name.singularize
 227   end
 228
 229   def table_name
 230     controller_name
 231   end
 232
 233   def find_object_by_uuid
 234     if params[:id] and params[:id].match /\D/
 235       params[:uuid] = params.delete :id
 236     end
 237     @object = model_class.where('uuid=?', params[:uuid]).first
 238   end
 239
 240   def self.accept_attribute_as_json(attr, force_class=nil)
 241     before_filter lambda { accept_attribute_as_json attr, force_class }
 242   end
 243   def accept_attribute_as_json(attr, force_class)
 244     if params[resource_name].is_a? Hash
 245       if params[resource_name][attr].is_a? String
 246         params[resource_name][attr] = Oj.load params[resource_name][attr]
 247         if force_class and !params[resource_name][attr].is_a? force_class
 248           raise TypeError.new("#{resource_name}[#{attr.to_s}] must be a #{force_class.to_s}")
 249         end
 250       end
 251     end
 252   end
 253
 254   def uncamelcase_params_hash_keys
 255     self.params = uncamelcase_hash_keys(params)
 256   end
 257
 258   def uncamelcase_hash_keys(h, max_depth=-1)
 259     if h.is_a? Hash and max_depth != 0
 260       nh = Hash.new
 261       h.each do |k,v|
 262         if k.class == String
 263           nk = k.underscore
 264         elsif k.class == Symbol
 265           nk = k.to_s.underscore.to_sym
 266         else
 267           nk = k
 268         end
 269         nh[nk] = uncamelcase_hash_keys(v, max_depth-1)
 270       end
 271       h.replace(nh)
 272     end
 273     h
 274   end
 275
 276   def render_list
 277     @object_list = {
 278       :kind  => "orvos##{resource_name}List",
 279       :etag => "",
 280       :self_link => "",
 281       :next_page_token => "",
 282       :next_link => "",
 283       :items => @objects.as_api_response(:superuser)
 284     }
 285     render json: @object_list
 286   end
 287
 288   def remote_ip
 289     # Caveat: this is highly dependent on the proxy setup. YMMV.
 290     if request.headers.has_key?('HTTP_X_REAL_IP') then
 291       # We're behind a reverse proxy
 292       @remote_ip = request.headers['HTTP_X_REAL_IP']
 293     else
 294       # Hopefully, we are not!
 295       @remote_ip = request.env['REMOTE_ADDR']
 296     end
 297   end
 298 end