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