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   before_filter :find_object_by_uuid, :except => [:index, :create]
   8
   9   before_filter :remote_ip
  10   before_filter :login_required, :except => :render_not_found
  11
  12   before_filter :catch_redirect_hint
  13   attr_accessor :resource_attrs
  14
  15   def catch_redirect_hint
  16     if !current_user
  17       if params.has_key?('redirect_to') then
  18         session[:redirect_to] = params[:redirect_to]
  19       end
  20     end
  21   end
  22
  23   unless Rails.application.config.consider_all_requests_local
  24     rescue_from Exception,
  25     :with => :render_error
  26     rescue_from ActiveRecord::RecordNotFound,
  27     :with => :render_not_found
  28     rescue_from ActionController::RoutingError,
  29     :with => :render_not_found
  30     rescue_from ActionController::UnknownController,
  31     :with => :render_not_found
  32     rescue_from ActionController::UnknownAction,
  33     :with => :render_not_found
  34   end
  35
  36   def render_error(e)
  37     logger.error e.inspect
  38     logger.error e.backtrace.collect { |x| x + "\n" }.join('') if e.backtrace
  39     if @object and @object.errors and @object.errors.full_messages
  40       errors = @object.errors.full_messages
  41     else
  42       errors = [e.inspect]
  43     end
  44     render json: { errors: errors }, status: 422
  45   end
  46
  47   def render_not_found(e=ActionController::RoutingError.new("Path not found"))
  48     logger.error e.inspect
  49     render json: { errors: ["Path not found"] }, status: 404
  50   end
  51
  52   def index
  53     uuid_list = [current_user.uuid, *current_user.groups_i_can(:read)]
  54     sanitized_uuid_list = uuid_list.
  55       collect { |uuid| model_class.sanitize(uuid) }.join(', ')
  56     @objects ||= model_class.
  57       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'").
  58       where("?=? OR #{table_name}.owner in (?) OR #{table_name}.uuid=? OR permissions.head_uuid IS NOT NULL",
  59             true, current_user.is_admin,
  60             uuid_list,
  61             current_user.uuid)
  62     if params[:where]
  63       where = params[:where]
  64       where = Oj.load(where) if where.is_a?(String)
  65       conditions = ['1=1']
  66       where.each do |attr,value|
  67         if (!value.nil? and
  68             attr.to_s.match(/^[a-z][_a-z0-9]+$/) and
  69             model_class.columns.collect(&:name).index(attr))
  70           if value.is_a? Array
  71             conditions[0] << " and #{table_name}.#{attr} in (?)"
  72             conditions << value
  73           else
  74             conditions[0] << " and #{table_name}.#{attr}=?"
  75             conditions << value
  76           end
  77         elsif (!value.nil? and attr == 'any' and
  78           value.is_a?(Array) and value[0] == 'contains' and
  79           model_class.columns.collect(&:name).index('name')) then
  80             conditions[0] << " and #{table_name}.name ilike ?"
  81             conditions << "%#{value[1]}%"
  82         end
  83       end
  84       if conditions.length > 1
  85         conditions[0].sub!(/^1=1 and /, '')
  86         @objects = @objects.
  87           where(*conditions)
  88       end
  89     end
  90     if params[:limit]
  91       begin
  92         @objects = @objects.limit(params[:limit].to_i)
  93       rescue
  94         raise "invalid argument (limit)"
  95       end
  96     else
  97       @objects = @objects.limit(100)
  98     end
  99     @objects = @objects.order('modified_at desc')
 100     @objects.uniq!(&:id)
 101     if params[:eager] and params[:eager] != '0' and params[:eager] != 0 and params[:eager] != ''
 102       @objects.each(&:eager_load_associations)
 103     end
 104     render_list
 105   end
 106
 107   def show
 108     if @object
 109       render json: @object.as_api_response(:superuser)
 110     else
 111       render_not_found("object not found")
 112     end
 113   end
 114
 115   def create
 116     @object = model_class.new resource_attrs
 117     @object.save
 118     show
 119   end
 120
 121   def update
 122     @object.update_attributes resource_attrs
 123     show
 124   end
 125
 126   def destroy
 127     @object.destroy
 128     show
 129   end
 130
 131   protected
 132
 133   def resource_attrs
 134     return @attrs if @attrs
 135     @attrs = params[resource_name]
 136     if @attrs.is_a? String
 137       @attrs = uncamelcase_hash_keys(Oj.load @attrs)
 138     end
 139     unless @attrs.is_a? Hash
 140       raise "no #{resource_name} (or #{resource_name.camelcase(:lower)}) hash provided with request #{params.inspect}"
 141     end
 142     %w(created_at modified_by_client modified_by_user modified_at).each do |x|
 143       @attrs.delete x
 144     end
 145     @attrs
 146   end
 147
 148   # Authentication
 149   def login_required
 150     if !current_user
 151       respond_to do |format|
 152         format.html  {
 153           redirect_to '/auth/joshid'
 154         }
 155         format.json {
 156           render :json => { errors: ['Not logged in'] }.to_json
 157         }
 158       end
 159     end
 160   end
 161
 162   def thread_with_auth_info
 163     begin
 164       user = nil
 165       api_client = nil
 166       api_client_auth = nil
 167       supplied_token = params[:api_token] || params[:oauth_token]
 168       if supplied_token
 169         api_client_auth = ApiClientAuthorization.
 170           includes(:api_client, :user).
 171           where('api_token=?', supplied_token).
 172           first
 173         if api_client_auth
 174           session[:user_id] = api_client_auth.user.id
 175           session[:api_client_uuid] = api_client_auth.api_client.uuid
 176           session[:api_client_authorization_id] = api_client_auth.id
 177           user = api_client_auth.user
 178           api_client = api_client_auth.api_client
 179         end
 180       elsif session[:user_id]
 181         user = User.find(session[:user_id]) rescue nil
 182         api_client = ApiClient.
 183           where('uuid=?',session[:api_client_uuid]).
 184           first rescue nil
 185         if session[:api_client_authorization_id] then
 186           api_client_auth = ApiClientAuthorization.
 187             find session[:api_client_authorization_id]
 188         end
 189       end
 190       Thread.current[:api_client_trusted] = session[:api_client_trusted]
 191       Thread.current[:api_client_ip_address] = remote_ip
 192       Thread.current[:api_client_authorization] = api_client_auth
 193       Thread.current[:api_client_uuid] = api_client && api_client.uuid
 194       Thread.current[:api_client] = api_client
 195       Thread.current[:user] = user
 196       yield
 197     ensure
 198       Thread.current[:api_client_trusted] = nil
 199       Thread.current[:api_client_ip_address] = nil
 200       Thread.current[:api_client_authorization] = nil
 201       Thread.current[:api_client_uuid] = nil
 202       Thread.current[:api_client] = nil
 203       Thread.current[:user] = nil
 204     end
 205   end
 206   # /Authentication
 207
 208   def model_class
 209     controller_name.classify.constantize
 210   end
 211
 212   def resource_name             # params[] key used by client
 213     controller_name.singularize
 214   end
 215
 216   def table_name
 217     controller_name
 218   end
 219
 220   def find_object_by_uuid
 221     if params[:id] and params[:id].match /\D/
 222       params[:uuid] = params.delete :id
 223     end
 224     @object = model_class.where('uuid=?', params[:uuid]).first
 225   end
 226
 227   def self.accept_attribute_as_json(attr, force_class=nil)
 228     before_filter lambda { accept_attribute_as_json attr, force_class }
 229   end
 230   def accept_attribute_as_json(attr, force_class)
 231     if params[resource_name].is_a? Hash
 232       if params[resource_name][attr].is_a? String
 233         params[resource_name][attr] = Oj.load params[resource_name][attr]
 234         if force_class and !params[resource_name][attr].is_a? force_class
 235           raise TypeError.new("#{resource_name}[#{attr.to_s}] must be a #{force_class.to_s}")
 236         end
 237       end
 238     end
 239   end
 240
 241   def uncamelcase_params_hash_keys
 242     self.params = uncamelcase_hash_keys(params)
 243   end
 244
 245   def uncamelcase_hash_keys(h, max_depth=-1)
 246     if h.is_a? Hash and max_depth != 0
 247       nh = Hash.new
 248       h.each do |k,v|
 249         if k.class == String
 250           nk = k.underscore
 251         elsif k.class == Symbol
 252           nk = k.to_s.underscore.to_sym
 253         else
 254           nk = k
 255         end
 256         nh[nk] = uncamelcase_hash_keys(v, max_depth-1)
 257       end
 258       h.replace(nh)
 259     end
 260     h
 261   end
 262
 263   def render_list
 264     @object_list = {
 265       :kind  => "orvos##{resource_name}List",
 266       :etag => "",
 267       :self_link => "",
 268       :next_page_token => "",
 269       :next_link => "",
 270       :items => @objects.as_api_response(:superuser)
 271     }
 272     render json: @object_list
 273   end
 274
 275   def remote_ip
 276     # Caveat: this is highly dependent on the proxy setup. YMMV.
 277     if request.headers.has_key?('HTTP_X_REAL_IP') then
 278       # We're behind a reverse proxy
 279       @remote_ip = request.headers['HTTP_X_REAL_IP']
 280     else
 281       # Hopefully, we are not!
 282       @remote_ip = request.env['REMOTE_ADDR']
 283     end
 284   end
 285 end