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