1 module ApiTemplateOverride
2 def allowed_to_render?(fieldset, field, model, options)
5 options[:select].include? field.to_s
12 class ActsAsApi::ApiTemplate
13 prepend ApiTemplateOverride
18 class ApplicationController < ActionController::Base
19 include CurrentApiClient
20 include ThemesForRails::ActionController
26 ERROR_ACTIONS = [:render_error, :render_not_found]
28 before_filter :disable_api_methods
29 before_filter :set_cors_headers
30 before_filter :respond_with_json_by_default
31 before_filter :remote_ip
32 before_filter :load_read_auths
33 before_filter :require_auth_scope, except: ERROR_ACTIONS
35 before_filter :catch_redirect_hint
36 before_filter(:find_object_by_uuid,
37 except: [:index, :create] + ERROR_ACTIONS)
38 before_filter :load_required_parameters
39 before_filter :load_limit_offset_order_params, only: [:index, :contents]
40 before_filter :load_where_param, only: [:index, :contents]
41 before_filter :load_filters_param, only: [:index, :contents]
42 before_filter :find_objects_for_index, :only => :index
43 before_filter :reload_object_before_update, :only => :update
44 before_filter(:render_404_if_no_object,
45 except: [:index, :create] + ERROR_ACTIONS)
49 attr_accessor :resource_attrs
52 rescue_from(Exception,
53 ArvadosModel::PermissionDeniedError,
54 :with => :render_error)
55 rescue_from(ActiveRecord::RecordNotFound,
56 ActionController::RoutingError,
57 ActionController::UnknownController,
58 AbstractController::ActionNotFound,
59 :with => :render_not_found)
62 def default_url_options
63 if Rails.configuration.host
64 {:host => Rails.configuration.host}
71 @objects.uniq!(&:id) if @select.nil? or @select.include? "id"
72 if params[:eager] and params[:eager] != '0' and params[:eager] != 0 and params[:eager] != ''
73 @objects.each(&:eager_load_associations)
79 send_json @object.as_api_response(nil, select: @select)
83 @object = model_class.new resource_attrs
85 if @object.respond_to? :name and params[:ensure_unique_name]
86 # Record the original name. See below.
87 name_stem = @object.name
93 rescue ActiveRecord::RecordNotUnique => rn
94 raise unless params[:ensure_unique_name]
96 # Dig into the error to determine if it is specifically calling out a
97 # (owner_uuid, name) uniqueness violation. In this specific case, and
98 # the client requested a unique name with ensure_unique_name==true,
99 # update the name field and try to save again. Loop as necessary to
100 # discover a unique name. It is necessary to handle name choosing at
101 # this level (as opposed to the client) to ensure that record creation
102 # never fails due to a race condition.
103 raise unless rn.original_exception.is_a? PG::UniqueViolation
105 # Unfortunately ActiveRecord doesn't abstract out any of the
106 # necessary information to figure out if this the error is actually
107 # the specific case where we want to apply the ensure_unique_name
108 # behavior, so the following code is specialized to Postgres.
109 err = rn.original_exception
110 detail = err.result.error_field(PG::Result::PG_DIAG_MESSAGE_DETAIL)
111 raise unless /^Key \(owner_uuid, name\)=\([a-z0-9]{5}-[a-z0-9]{5}-[a-z0-9]{15}, .*?\) already exists\./.match detail
113 # OK, this exception really is just a unique name constraint
114 # violation, and we've been asked to ensure_unique_name.
117 @object.name = "#{name_stem} (#{counter})"
124 attrs_to_update = resource_attrs.reject { |k,v|
125 [:kind, :etag, :href].index k
127 @object.update_attributes! attrs_to_update
136 def catch_redirect_hint
138 if params.has_key?('redirect_to') then
139 session[:redirect_to] = params[:redirect_to]
144 def render_404_if_no_object
145 render_not_found "Object not found" if !@object
149 logger.error e.inspect
150 if e.respond_to? :backtrace and e.backtrace
151 logger.error e.backtrace.collect { |x| x + "\n" }.join('')
153 if (@object.respond_to? :errors and
154 @object.errors.andand.full_messages.andand.any?)
155 errors = @object.errors.full_messages
156 logger.error errors.inspect
160 status = e.respond_to?(:http_status) ? e.http_status : 422
161 send_error(*errors, status: status)
164 def render_not_found(e=ActionController::RoutingError.new("Path not found"))
165 logger.error e.inspect
166 send_error("Path not found", status: 404)
171 def send_error(*args)
172 if args.last.is_a? Hash
177 err[:errors] ||= args
178 err[:error_token] = [Time.now.utc.to_i, "%08x" % rand(16 ** 8)].join("+")
179 status = err.delete(:status) || 422
180 logger.error "Error #{err[:error_token]}: #{status}"
181 send_json err, status: status
184 def send_json response, opts={}
185 # The obvious render(json: ...) forces a slow JSON encoder. See
186 # #3021 and commit logs. Might be fixed in Rails 4.1.
188 text: Oj.dump(response, mode: :compat).html_safe,
189 content_type: 'application/json'
193 def self.limit_index_columns_read
194 # This method returns a list of column names.
195 # If an index request reads that column from the database,
196 # find_objects_for_index will only fetch objects until it reads
197 # max_index_database_read bytes of data from those columns.
201 def find_objects_for_index
202 @objects ||= model_class.readable_by(*@read_users)
203 apply_where_limit_order_params
204 limit_database_read if (action_name == "index")
207 def apply_filters model_class=nil
208 model_class ||= self.model_class
209 @objects = model_class.apply_filters(@objects, @filters)
212 def apply_where_limit_order_params model_class=nil
213 model_class ||= self.model_class
214 apply_filters model_class
216 ar_table_name = @objects.table_name
217 if @where.is_a? Hash and @where.any?
219 @where.each do |attr,value|
220 if attr.to_s == 'any'
221 if value.is_a?(Array) and
222 value.length == 2 and
223 value[0] == 'contains' then
225 model_class.searchable_columns('ilike').each do |column|
226 # Including owner_uuid in an "any column" search will
227 # probably just return a lot of false positives.
228 next if column == 'owner_uuid'
229 ilikes << "#{ar_table_name}.#{column} ilike ?"
230 conditions << "%#{value[1]}%"
233 conditions[0] << ' and (' + ilikes.join(' or ') + ')'
236 elsif attr.to_s.match(/^[a-z][_a-z0-9]+$/) and
237 model_class.columns.collect(&:name).index(attr.to_s)
239 conditions[0] << " and #{ar_table_name}.#{attr} is ?"
241 elsif value.is_a? Array
242 if value[0] == 'contains' and value.length == 2
243 conditions[0] << " and #{ar_table_name}.#{attr} like ?"
244 conditions << "%#{value[1]}%"
246 conditions[0] << " and #{ar_table_name}.#{attr} in (?)"
249 elsif value.is_a? String or value.is_a? Fixnum or value == true or value == false
250 conditions[0] << " and #{ar_table_name}.#{attr}=?"
252 elsif value.is_a? Hash
253 # Not quite the same thing as "equal?" but better than nothing?
256 conditions[0] << " and #{ar_table_name}.#{attr} ilike ?"
257 conditions << "%#{k}%#{v}%"
263 if conditions.length > 1
264 conditions[0].sub!(/^1=1 and /, '')
271 unless action_name.in? %w(create update destroy)
272 # Map attribute names in @select to real column names, resolve
273 # those to fully-qualified SQL column names, and pass the
274 # resulting string to the select method.
275 columns_list = model_class.columns_for_attributes(@select).
276 map { |s| "#{ar_table_name}.#{ActiveRecord::Base.connection.quote_column_name s}" }
277 @objects = @objects.select(columns_list.join(", "))
280 # This information helps clients understand what they're seeing
281 # (Workbench always expects it), but they can't select it explicitly
282 # because it's not an SQL column. Always add it.
283 # (This is harmless, given that clients can deduce what they're
284 # looking at by the returned UUID anyway.)
287 @objects = @objects.order(@orders.join ", ") if @orders.any?
288 @objects = @objects.limit(@limit)
289 @objects = @objects.offset(@offset)
290 @objects = @objects.uniq(@distinct) if not @distinct.nil?
293 def limit_database_read
294 limit_columns = self.class.limit_index_columns_read
295 limit_columns &= model_class.columns_for_attributes(@select) if @select
296 return if limit_columns.empty?
297 model_class.transaction do
298 limit_query = @objects.
300 select("(%s) as read_length" %
301 limit_columns.map { |s| "octet_length(#{s})" }.join(" + "))
304 limit_query.each do |record|
306 read_total += record.read_length.to_i
307 if read_total >= Rails.configuration.max_index_database_read
308 new_limit -= 1 if new_limit > 1
310 elsif new_limit >= @limit
315 @objects = @objects.limit(@limit)
316 # Force @objects to run its query inside this transaction.
317 @objects.each { |_| break }
322 return @attrs if @attrs
323 @attrs = params[resource_name]
324 if @attrs.is_a? String
325 @attrs = Oj.strict_load @attrs, symbol_keys: true
327 unless @attrs.is_a? Hash
328 message = "No #{resource_name}"
329 if resource_name.index('_')
330 message << " (or #{resource_name.camelcase(:lower)})"
332 message << " hash provided with request"
333 raise ArgumentError.new(message)
335 %w(created_at modified_by_client_uuid modified_by_user_uuid modified_at).each do |x|
336 @attrs.delete x.to_sym
338 @attrs = @attrs.symbolize_keys if @attrs.is_a? HashWithIndifferentAccess
345 if current_api_client_authorization
346 @read_auths << current_api_client_authorization
348 # Load reader tokens if this is a read request.
349 # If there are too many reader tokens, assume the request is malicious
351 if request.get? and params[:reader_tokens] and
352 params[:reader_tokens].size < 100
353 @read_auths += ApiClientAuthorization
355 .where('api_token IN (?) AND
356 (expires_at IS NULL OR expires_at > CURRENT_TIMESTAMP)',
357 params[:reader_tokens])
360 @read_auths.select! { |auth| auth.scopes_allow_request? request }
361 @read_users = @read_auths.map { |auth| auth.user }.uniq
366 respond_to do |format|
367 format.json { send_error("Not logged in", status: 401) }
368 format.html { redirect_to '/auth/joshid' }
375 unless current_user and current_user.is_admin
376 send_error("Forbidden", status: 403)
380 def require_auth_scope
381 if @read_auths.empty?
382 if require_login != false
383 send_error("Forbidden", status: 403)
389 def disable_api_methods
390 if Rails.configuration.disable_api_methods.
391 include?(controller_name + "." + action_name)
392 send_error("Disabled", status: 404)
397 response.headers['Access-Control-Allow-Origin'] = '*'
398 response.headers['Access-Control-Allow-Methods'] = 'GET, HEAD, PUT, POST, DELETE'
399 response.headers['Access-Control-Allow-Headers'] = 'Authorization'
400 response.headers['Access-Control-Max-Age'] = '86486400'
403 def respond_with_json_by_default
404 html_index = request.accepts.index(Mime::HTML)
405 if html_index.nil? or request.accepts[0...html_index].include?(Mime::JSON)
406 request.format = :json
411 controller_name.classify.constantize
414 def resource_name # params[] key used by client
415 controller_name.singularize
422 def find_object_by_uuid
423 if params[:id] and params[:id].match /\D/
424 params[:uuid] = params.delete :id
426 @where = { uuid: params[:uuid] }
432 find_objects_for_index
433 @object = @objects.first
436 def reload_object_before_update
437 # This is necessary to prevent an ActiveRecord::ReadOnlyRecord
438 # error when updating an object which was retrieved using a join.
439 if @object.andand.readonly?
440 @object = model_class.find_by_uuid(@objects.first.uuid)
444 def load_json_value(hash, key, must_be_class=nil)
445 if hash[key].is_a? String
446 hash[key] = Oj.strict_load(hash[key], symbol_keys: false)
447 if must_be_class and !hash[key].is_a? must_be_class
448 raise TypeError.new("parameter #{key.to_s} must be a #{must_be_class.to_s}")
453 def self.accept_attribute_as_json(attr, must_be_class=nil)
454 before_filter lambda { accept_attribute_as_json attr, must_be_class }
456 accept_attribute_as_json :properties, Hash
457 accept_attribute_as_json :info, Hash
458 def accept_attribute_as_json(attr, must_be_class)
459 if params[resource_name] and resource_attrs.is_a? Hash
460 if resource_attrs[attr].is_a? Hash
461 # Convert symbol keys to strings (in hashes provided by
463 resource_attrs[attr] = resource_attrs[attr].
464 with_indifferent_access.to_hash
466 load_json_value(resource_attrs, attr, must_be_class)
471 def self.accept_param_as_json(key, must_be_class=nil)
472 prepend_before_filter lambda { load_json_value(params, key, must_be_class) }
474 accept_param_as_json :reader_tokens, Array
478 :kind => "arvados##{(@response_resource_name || resource_name).camelize(:lower)}List",
483 :items => @objects.as_api_response(nil, {select: @select})
485 if @objects.respond_to? :except
486 list[:items_available] = @objects.
487 except(:limit).except(:offset).
488 count(:id, distinct: true)
494 send_json object_list
498 # Caveat: this is highly dependent on the proxy setup. YMMV.
499 if request.headers.has_key?('HTTP_X_REAL_IP') then
500 # We're behind a reverse proxy
501 @remote_ip = request.headers['HTTP_X_REAL_IP']
503 # Hopefully, we are not!
504 @remote_ip = request.env['REMOTE_ADDR']
508 def load_required_parameters
509 (self.class.send "_#{params[:action]}_requires_parameters" rescue {}).
511 if info[:required] and not params.include?(key)
512 raise ArgumentError.new("#{key} parameter is required")
513 elsif info[:type] == 'boolean'
514 # Make sure params[key] is either true or false -- not a
515 # string, not nil, etc.
516 if not params.include?(key)
517 params[key] = info[:default]
518 elsif [false, 'false', '0', 0].include? params[key]
520 elsif [true, 'true', '1', 1].include? params[key]
523 raise TypeError.new("#{key} parameter must be a boolean, true or false")
530 def self._create_requires_parameters
532 ensure_unique_name: {
534 description: "Adjust name to ensure uniqueness instead of returning an error on (owner_uuid, name) collision.",
542 def self._index_requires_parameters
544 filters: { type: 'array', required: false },
545 where: { type: 'object', required: false },
546 order: { type: 'array', required: false },
547 select: { type: 'array', required: false },
548 distinct: { type: 'boolean', required: false },
549 limit: { type: 'integer', required: false, default: DEFAULT_LIMIT },
550 offset: { type: 'integer', required: false, default: 0 },
554 def client_accepts_plain_text_stream
555 (request.headers['Accept'].split(' ') &
556 ['text/plain', '*/*']).count > 0
561 response = opts.first[:json]
562 if response.is_a?(Hash) &&
564 Thread.current[:request_starttime]
565 response[:_profile] = {
566 request_time: Time.now - Thread.current[:request_starttime]
574 return Rails.configuration.arvados_theme