app/controllers/application_controller.rb

   1 class ApplicationController < ActionController::Base
   2   protect_from_forgery
   3   before_filter :uncamelcase_params_hash_keys
   4   around_filter :thread_with_auth_info, :except => [:render_error, :render_not_found]
   5   before_filter :find_object_by_uuid, :except => :index
   6
   7   before_filter :remote_ip
   8   before_filter :login_required, :except => :render_not_found
   9
  10   before_filter :catch_redirect_hint
  11
  12   def catch_redirect_hint
  13     if !current_user
  14       if params.has_key?('redirect_to') then
  15         session[:redirect_to] = params[:redirect_to]
  16       end
  17     end
  18   end
  19
  20   unless Rails.application.config.consider_all_requests_local
  21     rescue_from Exception,
  22     :with => :render_error
  23     rescue_from ActiveRecord::RecordNotFound,
  24     :with => :render_not_found
  25     rescue_from ActionController::RoutingError,
  26     :with => :render_not_found
  27     rescue_from ActionController::UnknownController,
  28     :with => :render_not_found
  29     rescue_from ActionController::UnknownAction,
  30     :with => :render_not_found
  31   end
  32
  33   def render_error(e)
  34     logger.error e.inspect
  35     logger.error e.backtrace.collect { |x| x + "\n" }.join('') if e.backtrace
  36     if @object and @object.errors and @object.errors.full_messages
  37       errors = @object.errors.full_messages
  38     else
  39       errors = [e.inspect]
  40     end
  41     render json: { errors: errors }, status: 422
  42   end
  43
  44   def render_not_found(e=ActionController::RoutingError.new("Path not found"))
  45     logger.error e.inspect
  46     render json: { errors: ["Path not found"] }, status: 404
  47   end
  48
  49   def index
  50     @objects ||= model_class.
  51       joins("LEFT JOIN metadata permissions ON permissions.tail=#{table_name}.uuid AND permissions.head=#{model_class.sanitize Thread.current[:user_uuid]} AND permissions.metadata_class='permission' AND permissions.name='visible_to'").
  52       where("#{table_name}.created_by_user=? OR permissions.head IS NOT NULL",
  53             Thread.current[:user_uuid])
  54     if params[:where]
  55       where = params[:where]
  56       where = JSON.parse(where) if where.is_a?(String)
  57       conditions = ['1=1']
  58       where.each do |attr,value|
  59         if (!value.nil? and
  60             attr.to_s.match(/^[a-z][_a-z0-9]+$/) and
  61             model_class.columns.collect(&:name).index(attr))
  62           if value.is_a? Array
  63             conditions[0] << " and #{table_name}.#{attr} in (?)"
  64             conditions << value
  65           else
  66             conditions[0] << " and #{table_name}.#{attr}=?"
  67             conditions << value
  68           end
  69         end
  70       end
  71       if conditions.length > 1
  72         conditions[0].sub!(/^1=1 and /, '')
  73         @objects = @objects.
  74           where(*conditions)
  75       end
  76     end
  77     if params[:eager] and params[:eager] != '0' and params[:eager] != 0 and params[:eager] != ''
  78       @objects.each(&:eager_load_associations)
  79     end
  80     render_list
  81   end
  82
  83   def show
  84     if @object
  85       render json: @object.as_api_response(:superuser)
  86     else
  87       render_not_found("object not found")
  88     end
  89   end
  90
  91   def create
  92     @attrs = params[resource_name]
  93     if @attrs.nil?
  94       raise "no #{resource_name} (or #{resource_name.camelcase(:lower)}) provided with request #{params.inspect}"
  95     end
  96     if @attrs.class == String
  97       @attrs = uncamelcase_hash_keys(JSON.parse @attrs)
  98     end
  99     @object = model_class.new @attrs
 100     @object.save
 101     show
 102   end
 103
 104   def update
 105     @attrs = params[resource_name]
 106     if @attrs.is_a? String
 107       @attrs = uncamelcase_hash_keys(JSON.parse @attrs)
 108     end
 109     @object.update_attributes @attrs
 110     show
 111   end
 112
 113   def current_user
 114     Thread.current[:user]
 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 => { 'error' => 'Not logged in' }.to_json
 128         }
 129       end
 130     end
 131   end
 132
 133   def thread_with_auth_info
 134     begin
 135       if params[:api_token]
 136         @api_client_auth = ApiClientAuthorization.
 137           includes(:api_client, :user).
 138           where('api_token=?', params[:api_token]).
 139           first
 140         if @api_client_auth
 141           session[:user_id] = @api_client_auth.user.id
 142           session[:user_uuid] = @api_client_auth.user.uuid
 143           session[:api_client_uuid] = @api_client_auth.api_client.uuid
 144         end
 145       end
 146       Thread.current[:api_client_trusted] = session[:api_client_trusted]
 147       Thread.current[:api_client_ip_address] = remote_ip
 148       Thread.current[:api_client_uuid] = session[:api_client_uuid]
 149       Thread.current[:user_uuid] = session[:user_uuid]
 150       Thread.current[:remote_ip] = remote_ip
 151       Thread.current[:user] = User.find(session[:user_id]) rescue nil
 152       yield
 153     ensure
 154       Thread.current[:api_client_trusted] = nil
 155       Thread.current[:api_client_ip_address] = nil
 156       Thread.current[:api_client_uuid] = nil
 157       Thread.current[:user_uuid] = nil
 158       Thread.current[:remote_ip] = nil
 159       Thread.current[:user] = nil
 160     end
 161   end
 162   # /Authentication
 163
 164   def model_class
 165     controller_name.classify.constantize
 166   end
 167
 168   def resource_name             # params[] key used by client
 169     controller_name.singularize
 170   end
 171
 172   def table_name
 173     controller_name
 174   end
 175
 176   def find_object_by_uuid
 177     if params[:id] and params[:id].match /\D/
 178       params[:uuid] = params.delete :id
 179     end
 180     @object = model_class.where('uuid=?', params[:uuid]).first
 181   end
 182
 183   def self.accept_attribute_as_json(attr, force_class=nil)
 184     before_filter lambda { accept_attribute_as_json attr, force_class }
 185   end
 186   def accept_attribute_as_json(attr, force_class)
 187     if params[resource_name].is_a? Hash
 188       if params[resource_name][attr].is_a? String
 189         params[resource_name][attr] = JSON.parse params[resource_name][attr]
 190         if force_class and !params[resource_name][attr].is_a? force_class
 191           raise TypeError.new("#{resource_name}[#{attr.to_s}] must be a #{force_class.to_s}")
 192         end
 193       end
 194     end
 195   end
 196
 197   def uncamelcase_params_hash_keys
 198     self.params = uncamelcase_hash_keys(params)
 199   end
 200
 201   def uncamelcase_hash_keys(h, max_depth=-1)
 202     if h.is_a? Hash and max_depth != 0
 203       nh = Hash.new
 204       h.each do |k,v|
 205         if k.class == String
 206           nk = k.underscore
 207         elsif k.class == Symbol
 208           nk = k.to_s.underscore.to_sym
 209         else
 210           nk = k
 211         end
 212         nh[nk] = uncamelcase_hash_keys(v, max_depth-1)
 213       end
 214       h.replace(nh)
 215     end
 216     h
 217   end
 218
 219   def render_list
 220     @object_list = {
 221       :kind  => "orvos##{resource_name}List",
 222       :etag => "",
 223       :self_link => "",
 224       :next_page_token => "",
 225       :next_link => "",
 226       :items => @objects.as_api_response(:superuser)
 227     }
 228     render json: @object_list
 229   end
 230
 231 private
 232   def remote_ip
 233     # Caveat: this is highly dependent on the proxy setup. YMMV.
 234     if request.headers.has_key?('HTTP_X_REAL_IP') then
 235       # We're behind a reverse proxy
 236       @remote_ip = request.headers['HTTP_X_REAL_IP']
 237     else
 238       # Hopefully, we are not!
 239       @remote_ip = request.env['REMOTE_ADDR']
 240     end
 241   end
 242 end