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