X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/943feeec776bb75c685cbdee9466f8db3cdf5da7..30a74a09202eedbea5e5c7bd59768e616cd38c79:/services/api/app/controllers/application_controller.rb

diff --git a/services/api/app/controllers/application_controller.rb b/services/api/app/controllers/application_controller.rb
index 3891bde52e..d3b5c6b147 100644
--- a/services/api/app/controllers/application_controller.rb
+++ b/services/api/app/controllers/application_controller.rb
@@ -1,3 +1,16 @@
+module ApiTemplateOverride
+  def allowed_to_render?(fieldset, field, model, options)
+    if options[:select]
+      return options[:select].include? field.to_s
+    end
+    super
+  end
+end
+
+class ActsAsApi::ApiTemplate
+  prepend ApiTemplateOverride
+end
+
 require 'load_param'
 require 'record_filters'
 
@@ -10,29 +23,41 @@ class ApplicationController < ActionController::Base
   respond_to :json
   protect_from_forgery
 
+  ERROR_ACTIONS = [:render_error, :render_not_found]
+
   before_filter :respond_with_json_by_default
   before_filter :remote_ip
-  before_filter :require_auth_scope, :except => :render_not_found
-  before_filter :catch_redirect_hint
+  before_filter :load_read_auths
+  before_filter :require_auth_scope, except: ERROR_ACTIONS
 
-  before_filter :find_object_by_uuid, :except => [:index, :create,
-                                                  :render_error,
-                                                  :render_not_found]
-  before_filter :load_limit_offset_order_params, only: [:index, :owned_items]
-  before_filter :load_where_param, only: [:index, :owned_items]
-  before_filter :load_filters_param, only: [:index, :owned_items]
+  before_filter :catch_redirect_hint
+  before_filter(:find_object_by_uuid,
+                except: [:index, :create] + ERROR_ACTIONS)
+  before_filter :load_limit_offset_order_params, only: [:index, :contents]
+  before_filter :load_where_param, only: [:index, :contents]
+  before_filter :load_filters_param, only: [:index, :contents]
   before_filter :find_objects_for_index, :only => :index
   before_filter :reload_object_before_update, :only => :update
-  before_filter :render_404_if_no_object, except: [:index, :create,
-                                                   :render_error,
-                                                   :render_not_found]
+  before_filter(:render_404_if_no_object,
+                except: [:index, :create] + ERROR_ACTIONS)
 
   theme :select_theme
 
   attr_accessor :resource_attrs
 
+  begin
+    rescue_from(Exception,
+                ArvadosModel::PermissionDeniedError,
+                :with => :render_error)
+    rescue_from(ActiveRecord::RecordNotFound,
+                ActionController::RoutingError,
+                ActionController::UnknownController,
+                AbstractController::ActionNotFound,
+                :with => :render_not_found)
+  end
+
   def index
-    @objects.uniq!(&:id)
+    @objects.uniq!(&:id) if @select.nil? or @select.include? "id"
     if params[:eager] and params[:eager] != '0' and params[:eager] != 0 and params[:eager] != ''
       @objects.each(&:eager_load_associations)
     end
@@ -62,75 +87,6 @@ class ApplicationController < ActionController::Base
     show
   end
 
-  def self._owned_items_requires_parameters
-    _index_requires_parameters.
-      merge({
-              include_linked: {
-                type: 'boolean', required: false, default: false
-              },
-            })
-  end
-
-  def owned_items
-    all_objects = []
-    all_available = 0
-
-    # Trick apply_where_limit_order_params into applying suitable
-    # per-table values. *_all are the real ones we'll apply to the
-    # aggregate set.
-    limit_all = @limit
-    offset_all = @offset
-    @orders = []
-
-    ArvadosModel.descendants.
-      reject(&:abstract_class?).
-      sort_by(&:to_s).
-      each do |klass|
-      case klass.to_s
-        # We might expect klass==Link etc. here, but we would be
-        # disappointed: when Rails reloads model classes, we get two
-        # distinct classes called Link which do not equal each
-        # other. But we can still rely on klass.to_s to be "Link".
-      when 'ApiClientAuthorization'
-        # Do not want.
-      else
-        @objects = klass.readable_by(current_user)
-        cond_sql = "#{klass.table_name}.owner_uuid = ?"
-        cond_params = [@object.uuid]
-        if params[:include_linked]
-          @objects = @objects.
-            joins("LEFT JOIN links mng_links"\
-                  " ON mng_links.link_class=#{klass.sanitize 'permission'}"\
-                  "    AND mng_links.name=#{klass.sanitize 'can_manage'}"\
-                  "    AND mng_links.tail_uuid=#{klass.sanitize @object.uuid}"\
-                  "    AND mng_links.head_uuid=#{klass.table_name}.uuid")
-          cond_sql += " OR mng_links.uuid IS NOT NULL"
-        end
-        @objects = @objects.where(cond_sql, *cond_params).order(:uuid)
-        @limit = limit_all - all_objects.count
-        apply_where_limit_order_params
-        items_available = @objects.
-          except(:limit).except(:offset).
-          count(:id, distinct: true)
-        all_available += items_available
-        @offset = [@offset - items_available, 0].max
-
-        all_objects += @objects.to_a
-      end
-    end
-    @objects = all_objects || []
-    @object_list = {
-      :kind  => "arvados#objectList",
-      :etag => "",
-      :self_link => "",
-      :offset => offset_all,
-      :limit => limit_all,
-      :items_available => all_available,
-      :items => @objects.as_api_response(nil)
-    }
-    render json: @object_list
-  end
-
   def catch_redirect_hint
     if !current_user
       if params.has_key?('redirect_to') then
@@ -139,21 +95,6 @@ class ApplicationController < ActionController::Base
     end
   end
 
-  begin
-    rescue_from Exception,
-    :with => :render_error
-    rescue_from ActiveRecord::RecordNotFound,
-    :with => :render_not_found
-    rescue_from ActionController::RoutingError,
-    :with => :render_not_found
-    rescue_from ActionController::UnknownController,
-    :with => :render_not_found
-    rescue_from AbstractController::ActionNotFound,
-    :with => :render_not_found
-    rescue_from ArvadosModel::PermissionDeniedError,
-    :with => :render_error
-  end
-
   def render_404_if_no_object
     render_not_found "Object not found" if !@object
   end
@@ -165,33 +106,50 @@ class ApplicationController < ActionController::Base
     end
     if @object and @object.errors and @object.errors.full_messages and not @object.errors.full_messages.empty?
       errors = @object.errors.full_messages
+      logger.error errors.inspect
     else
       errors = [e.inspect]
     end
     status = e.respond_to?(:http_status) ? e.http_status : 422
-    render json: { errors: errors }, status: status
+    send_error(*errors, status: status)
   end
 
   def render_not_found(e=ActionController::RoutingError.new("Path not found"))
     logger.error e.inspect
-    render json: { errors: ["Path not found"] }, status: 404
+    send_error("Path not found", status: 404)
   end
 
   protected
 
+  def send_error(*args)
+    if args.last.is_a? Hash
+      err = args.pop
+    else
+      err = {}
+    end
+    err[:errors] ||= args
+    err[:error_token] = [Time.now.utc.to_i, "%08x" % rand(16 ** 8)].join("+")
+    status = err.delete(:status) || 422
+    logger.error "Error #{err[:error_token]}: #{status}"
+    render json: err, status: status
+  end
+
   def find_objects_for_index
-    @objects ||= model_class.readable_by(current_user)
+    @objects ||= model_class.readable_by(*@read_users)
     apply_where_limit_order_params
   end
 
-  def apply_where_limit_order_params
-    ar_table_name = @objects.table_name
-
-    ft = record_filters @filters, ar_table_name
+  def apply_filters
+    ft = record_filters @filters, @objects.table_name
     if ft[:cond_out].any?
       @objects = @objects.where(ft[:cond_out].join(' AND '), *ft[:param_out])
     end
+  end
 
+  def apply_where_limit_order_params
+    apply_filters
+
+    ar_table_name = @objects.table_name
     if @where.is_a? Hash and @where.any?
       conditions = ['1=1']
       @where.each do |attr,value|
@@ -245,9 +203,21 @@ class ApplicationController < ActionController::Base
       end
     end
 
+    if @select
+      # Map attribute names in @select to real column names, resolve
+      # those to fully-qualified SQL column names, and pass the
+      # resulting string to the select method.
+      api_column_map = model_class.attributes_required_columns
+      columns_list = @select.
+        flat_map { |attr| api_column_map[attr] }.
+        uniq.
+        map { |s| "#{table_name}.#{ActiveRecord::Base.connection.quote_column_name s}" }
+      @objects = @objects.select(columns_list.join(", "))
+    end
     @objects = @objects.order(@orders.join ", ") if @orders.any?
     @objects = @objects.limit(@limit)
     @objects = @objects.offset(@offset)
+    @objects = @objects.uniq(@distinct) if not @distinct.nil?
   end
 
   def resource_attrs
@@ -272,17 +242,32 @@ class ApplicationController < ActionController::Base
   end
 
   # Authentication
+  def load_read_auths
+    @read_auths = []
+    if current_api_client_authorization
+      @read_auths << current_api_client_authorization
+    end
+    # Load reader tokens if this is a read request.
+    # If there are too many reader tokens, assume the request is malicious
+    # and ignore it.
+    if request.get? and params[:reader_tokens] and
+        params[:reader_tokens].size < 100
+      @read_auths += ApiClientAuthorization
+        .includes(:user)
+        .where('api_token IN (?) AND
+                (expires_at IS NULL OR expires_at > CURRENT_TIMESTAMP)',
+               params[:reader_tokens])
+        .all
+    end
+    @read_auths.select! { |auth| auth.scopes_allow_request? request }
+    @read_users = @read_auths.map { |auth| auth.user }.uniq
+  end
+
   def require_login
-    if current_user
-      true
-    else
+    if not current_user
       respond_to do |format|
-        format.json {
-          render :json => { errors: ['Not logged in'] }.to_json, status: 401
-        }
-        format.html  {
-          redirect_to '/auth/joshid'
-        }
+        format.json { send_error("Not logged in", status: 401) }
+        format.html { redirect_to '/auth/joshid' }
       end
       false
     end
@@ -290,14 +275,16 @@ class ApplicationController < ActionController::Base
 
   def admin_required
     unless current_user and current_user.is_admin
-      render :json => { errors: ['Forbidden'] }.to_json, status: 403
+      send_error("Forbidden", status: 403)
     end
   end
 
   def require_auth_scope
-    return false unless require_login
-    unless current_api_client_auth_has_scope("#{request.method} #{request.path}")
-      render :json => { errors: ['Forbidden'] }.to_json, status: 403
+    if @read_auths.empty?
+      if require_login != false
+        send_error("Forbidden", status: 403)
+      end
+      false
     end
   end
 
@@ -342,36 +329,54 @@ class ApplicationController < ActionController::Base
     end
   end
 
-  def self.accept_attribute_as_json(attr, force_class=nil)
-    before_filter lambda { accept_attribute_as_json attr, force_class }
+  def load_json_value(hash, key, must_be_class=nil)
+    if hash[key].is_a? String
+      hash[key] = Oj.load(hash[key], symbol_keys: false)
+      if must_be_class and !hash[key].is_a? must_be_class
+        raise TypeError.new("parameter #{key.to_s} must be a #{must_be_class.to_s}")
+      end
+    end
+  end
+
+  def self.accept_attribute_as_json(attr, must_be_class=nil)
+    before_filter lambda { accept_attribute_as_json attr, must_be_class }
   end
   accept_attribute_as_json :properties, Hash
   accept_attribute_as_json :info, Hash
-  def accept_attribute_as_json(attr, force_class)
+  def accept_attribute_as_json(attr, must_be_class)
     if params[resource_name] and resource_attrs.is_a? Hash
-      if resource_attrs[attr].is_a? String
-        resource_attrs[attr] = Oj.load(resource_attrs[attr],
-                                       symbol_keys: false)
-        if force_class and !resource_attrs[attr].is_a? force_class
-          raise TypeError.new("#{resource_name}[#{attr.to_s}] must be a #{force_class.to_s}")
-        end
-      elsif resource_attrs[attr].is_a? Hash
+      if resource_attrs[attr].is_a? Hash
         # Convert symbol keys to strings (in hashes provided by
         # resource_attrs)
         resource_attrs[attr] = resource_attrs[attr].
           with_indifferent_access.to_hash
+      else
+        load_json_value(resource_attrs, attr, must_be_class)
       end
     end
   end
 
+  def self.accept_param_as_json(key, must_be_class=nil)
+    prepend_before_filter lambda { load_json_value(params, key, must_be_class) }
+  end
+  accept_param_as_json :reader_tokens, Array
+
   def render_list
+    if @select
+      # This information helps clients understand what they're seeing
+      # (Workbench always expects it), but they can't select it explicitly
+      # because it's not an SQL column.  Always add it.
+      # I believe this is safe because clients can always deduce what they're
+      # looking at by the returned UUID anyway.
+      @select |= ["kind"]
+    end
     @object_list = {
       :kind  => "arvados##{(@response_resource_name || resource_name).camelize(:lower)}List",
       :etag => "",
       :self_link => "",
       :offset => @offset,
       :limit => @limit,
-      :items => @objects.as_api_response(nil)
+      :items => @objects.as_api_response(nil, {select: @select})
     }
     if @objects.respond_to? :except
       @object_list[:items_available] = @objects.
@@ -396,7 +401,9 @@ class ApplicationController < ActionController::Base
     {
       filters: { type: 'array', required: false },
       where: { type: 'object', required: false },
-      order: { type: 'string', required: false },
+      order: { type: 'array', required: false },
+      select: { type: 'array', required: false },
+      distinct: { type: 'boolean', required: false },
       limit: { type: 'integer', required: false, default: DEFAULT_LIMIT },
       offset: { type: 'integer', required: false, default: 0 },
     }