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
17 require 'record_filters'
19 class ApplicationController < ActionController::Base
20 include CurrentApiClient
21 include ThemesForRails::ActionController
28 ERROR_ACTIONS = [:render_error, :render_not_found]
30 before_filter :set_cors_headers
31 before_filter :respond_with_json_by_default
32 before_filter :remote_ip
33 before_filter :load_read_auths
34 before_filter :require_auth_scope, except: ERROR_ACTIONS
36 before_filter :catch_redirect_hint
37 before_filter(:find_object_by_uuid,
38 except: [:index, :create] + ERROR_ACTIONS)
39 before_filter :load_required_parameters
40 before_filter :load_limit_offset_order_params, only: [:index, :contents]
41 before_filter :load_where_param, only: [:index, :contents]
42 before_filter :load_filters_param, only: [:index, :contents]
43 before_filter :find_objects_for_index, :only => :index
44 before_filter :reload_object_before_update, :only => :update
45 before_filter(:render_404_if_no_object,
46 except: [:index, :create] + ERROR_ACTIONS)
50 attr_accessor :resource_attrs
53 rescue_from(Exception,
54 ArvadosModel::PermissionDeniedError,
55 :with => :render_error)
56 rescue_from(ActiveRecord::RecordNotFound,
57 ActionController::RoutingError,
58 ActionController::UnknownController,
59 AbstractController::ActionNotFound,
60 :with => :render_not_found)
63 def default_url_options
64 if Rails.configuration.host
65 {:host => Rails.configuration.host}
72 @objects.uniq!(&:id) if @select.nil? or @select.include? "id"
73 if params[:eager] and params[:eager] != '0' and params[:eager] != 0 and params[:eager] != ''
74 @objects.each(&:eager_load_associations)
80 send_json @object.as_api_response(nil, select: @select)
84 @object = model_class.new resource_attrs
86 if @object.respond_to? :name and params[:ensure_unique_name]
87 # Record the original name. See below.
88 name_stem = @object.name
94 rescue ActiveRecord::RecordNotUnique => rn
95 raise unless params[:ensure_unique_name]
97 # Dig into the error to determine if it is specifically calling out a
98 # (owner_uuid, name) uniqueness violation. In this specific case, and
99 # the client requested a unique name with ensure_unique_name==true,
100 # update the name field and try to save again. Loop as necessary to
101 # discover a unique name. It is necessary to handle name choosing at
102 # this level (as opposed to the client) to ensure that record creation
103 # never fails due to a race condition.
104 raise unless rn.original_exception.is_a? PG::UniqueViolation
106 # Unfortunately ActiveRecord doesn't abstract out any of the
107 # necessary information to figure out if this the error is actually
108 # the specific case where we want to apply the ensure_unique_name
109 # behavior, so the following code is specialized to Postgres.
110 err = rn.original_exception
111 detail = err.result.error_field(PG::Result::PG_DIAG_MESSAGE_DETAIL)
112 raise unless /^Key \(owner_uuid, name\)=\([a-z0-9]{5}-[a-z0-9]{5}-[a-z0-9]{15}, .*?\) already exists\./.match detail
114 # OK, this exception really is just a unique name constraint
115 # violation, and we've been asked to ensure_unique_name.
118 @object.name = "#{name_stem} (#{counter})"
125 attrs_to_update = resource_attrs.reject { |k,v|
126 [:kind, :etag, :href].index k
128 @object.update_attributes! attrs_to_update
137 def catch_redirect_hint
139 if params.has_key?('redirect_to') then
140 session[:redirect_to] = params[:redirect_to]
145 def render_404_if_no_object
146 render_not_found "Object not found" if !@object
150 logger.error e.inspect
151 if e.respond_to? :backtrace and e.backtrace
152 logger.error e.backtrace.collect { |x| x + "\n" }.join('')
154 if (@object.respond_to? :errors and
155 @object.errors.andand.full_messages.andand.any?)
156 errors = @object.errors.full_messages
157 logger.error errors.inspect
161 status = e.respond_to?(:http_status) ? e.http_status : 422
162 send_error(*errors, status: status)
165 def render_not_found(e=ActionController::RoutingError.new("Path not found"))
166 logger.error e.inspect
167 send_error("Path not found", status: 404)
172 def send_error(*args)
173 if args.last.is_a? Hash
178 err[:errors] ||= args
179 err[:error_token] = [Time.now.utc.to_i, "%08x" % rand(16 ** 8)].join("+")
180 status = err.delete(:status) || 422
181 logger.error "Error #{err[:error_token]}: #{status}"
182 send_json err, status: status
185 def send_json response, opts={}
186 # The obvious render(json: ...) forces a slow JSON encoder. See
187 # #3021 and commit logs. Might be fixed in Rails 4.1.
189 text: Oj.dump(response, mode: :compat).html_safe,
190 content_type: 'application/json'
194 def self.limit_index_columns_read
195 # This method returns a list of column names.
196 # If an index request reads that column from the database,
197 # find_objects_for_index will only fetch objects until it reads
198 # max_index_database_read bytes of data from those columns.
202 def find_objects_for_index
203 @objects ||= model_class.readable_by(*@read_users)
204 apply_where_limit_order_params
205 limit_database_read if (action_name == "index")
208 def apply_filters model_class=nil
209 model_class ||= self.model_class
210 ft = record_filters @filters, model_class
211 if ft[:cond_out].any?
212 @objects = @objects.where('(' + ft[:cond_out].join(') AND (') + ')',
217 def apply_where_limit_order_params model_class=nil
218 model_class ||= self.model_class
219 apply_filters model_class
221 ar_table_name = @objects.table_name
222 if @where.is_a? Hash and @where.any?
224 @where.each do |attr,value|
225 if attr.to_s == 'any'
226 if value.is_a?(Array) and
227 value.length == 2 and
228 value[0] == 'contains' then
230 model_class.searchable_columns('ilike').each do |column|
231 # Including owner_uuid in an "any column" search will
232 # probably just return a lot of false positives.
233 next if column == 'owner_uuid'
234 ilikes << "#{ar_table_name}.#{column} ilike ?"
235 conditions << "%#{value[1]}%"
238 conditions[0] << ' and (' + ilikes.join(' or ') + ')'
241 elsif attr.to_s.match(/^[a-z][_a-z0-9]+$/) and
242 model_class.columns.collect(&:name).index(attr.to_s)
244 conditions[0] << " and #{ar_table_name}.#{attr} is ?"
246 elsif value.is_a? Array
247 if value[0] == 'contains' and value.length == 2
248 conditions[0] << " and #{ar_table_name}.#{attr} like ?"
249 conditions << "%#{value[1]}%"
251 conditions[0] << " and #{ar_table_name}.#{attr} in (?)"
254 elsif value.is_a? String or value.is_a? Fixnum or value == true or value == false
255 conditions[0] << " and #{ar_table_name}.#{attr}=?"
257 elsif value.is_a? Hash
258 # Not quite the same thing as "equal?" but better than nothing?
261 conditions[0] << " and #{ar_table_name}.#{attr} ilike ?"
262 conditions << "%#{k}%#{v}%"
268 if conditions.length > 1
269 conditions[0].sub!(/^1=1 and /, '')
276 unless action_name.in? %w(create update destroy)
277 # Map attribute names in @select to real column names, resolve
278 # those to fully-qualified SQL column names, and pass the
279 # resulting string to the select method.
280 columns_list = model_class.columns_for_attributes(@select).
281 map { |s| "#{ar_table_name}.#{ActiveRecord::Base.connection.quote_column_name s}" }
282 @objects = @objects.select(columns_list.join(", "))
285 # This information helps clients understand what they're seeing
286 # (Workbench always expects it), but they can't select it explicitly
287 # because it's not an SQL column. Always add it.
288 # (This is harmless, given that clients can deduce what they're
289 # looking at by the returned UUID anyway.)
292 @objects = @objects.order(@orders.join ", ") if @orders.any?
293 @objects = @objects.limit(@limit)
294 @objects = @objects.offset(@offset)
295 @objects = @objects.uniq(@distinct) if not @distinct.nil?
298 def limit_database_read
299 limit_columns = self.class.limit_index_columns_read
300 limit_columns &= model_class.columns_for_attributes(@select) if @select
301 return if limit_columns.empty?
302 model_class.transaction do
303 limit_query = @objects.
305 select("(%s) as read_length" %
306 limit_columns.map { |s| "octet_length(#{s})" }.join(" + "))
309 limit_query.each do |record|
311 read_total += record.read_length.to_i
312 if read_total >= Rails.configuration.max_index_database_read
313 new_limit -= 1 if new_limit > 1
315 elsif new_limit >= @limit
320 @objects = @objects.limit(@limit)
321 # Force @objects to run its query inside this transaction.
322 @objects.each { |_| break }
327 return @attrs if @attrs
328 @attrs = params[resource_name]
329 if @attrs.is_a? String
330 @attrs = Oj.load @attrs, symbol_keys: true
332 unless @attrs.is_a? Hash
333 message = "No #{resource_name}"
334 if resource_name.index('_')
335 message << " (or #{resource_name.camelcase(:lower)})"
337 message << " hash provided with request"
338 raise ArgumentError.new(message)
340 %w(created_at modified_by_client_uuid modified_by_user_uuid modified_at).each do |x|
341 @attrs.delete x.to_sym
343 @attrs = @attrs.symbolize_keys if @attrs.is_a? HashWithIndifferentAccess
350 if current_api_client_authorization
351 @read_auths << current_api_client_authorization
353 # Load reader tokens if this is a read request.
354 # If there are too many reader tokens, assume the request is malicious
356 if request.get? and params[:reader_tokens] and
357 params[:reader_tokens].size < 100
358 @read_auths += ApiClientAuthorization
360 .where('api_token IN (?) AND
361 (expires_at IS NULL OR expires_at > CURRENT_TIMESTAMP)',
362 params[:reader_tokens])
365 @read_auths.select! { |auth| auth.scopes_allow_request? request }
366 @read_users = @read_auths.map { |auth| auth.user }.uniq
371 respond_to do |format|
372 format.json { send_error("Not logged in", status: 401) }
373 format.html { redirect_to '/auth/joshid' }
380 unless current_user and current_user.is_admin
381 send_error("Forbidden", status: 403)
385 def require_auth_scope
386 if @read_auths.empty?
387 if require_login != false
388 send_error("Forbidden", status: 403)
395 response.headers['Access-Control-Allow-Origin'] = '*'
396 response.headers['Access-Control-Allow-Methods'] = 'GET, HEAD, PUT, POST, DELETE'
397 response.headers['Access-Control-Allow-Headers'] = 'Authorization'
398 response.headers['Access-Control-Max-Age'] = '86486400'
401 def respond_with_json_by_default
402 html_index = request.accepts.index(Mime::HTML)
403 if html_index.nil? or request.accepts[0...html_index].include?(Mime::JSON)
404 request.format = :json
409 controller_name.classify.constantize
412 def resource_name # params[] key used by client
413 controller_name.singularize
420 def find_object_by_uuid
421 if params[:id] and params[:id].match /\D/
422 params[:uuid] = params.delete :id
424 @where = { uuid: params[:uuid] }
430 find_objects_for_index
431 @object = @objects.first
434 def reload_object_before_update
435 # This is necessary to prevent an ActiveRecord::ReadOnlyRecord
436 # error when updating an object which was retrieved using a join.
437 if @object.andand.readonly?
438 @object = model_class.find_by_uuid(@objects.first.uuid)
442 def load_json_value(hash, key, must_be_class=nil)
443 if hash[key].is_a? String
444 hash[key] = Oj.load(hash[key], symbol_keys: false)
445 if must_be_class and !hash[key].is_a? must_be_class
446 raise TypeError.new("parameter #{key.to_s} must be a #{must_be_class.to_s}")
451 def self.accept_attribute_as_json(attr, must_be_class=nil)
452 before_filter lambda { accept_attribute_as_json attr, must_be_class }
454 accept_attribute_as_json :properties, Hash
455 accept_attribute_as_json :info, Hash
456 def accept_attribute_as_json(attr, must_be_class)
457 if params[resource_name] and resource_attrs.is_a? Hash
458 if resource_attrs[attr].is_a? Hash
459 # Convert symbol keys to strings (in hashes provided by
461 resource_attrs[attr] = resource_attrs[attr].
462 with_indifferent_access.to_hash
464 load_json_value(resource_attrs, attr, must_be_class)
469 def self.accept_param_as_json(key, must_be_class=nil)
470 prepend_before_filter lambda { load_json_value(params, key, must_be_class) }
472 accept_param_as_json :reader_tokens, Array
476 :kind => "arvados##{(@response_resource_name || resource_name).camelize(:lower)}List",
481 :items => @objects.as_api_response(nil, {select: @select})
483 if @objects.respond_to? :except
484 list[:items_available] = @objects.
485 except(:limit).except(:offset).
486 count(:id, distinct: true)
492 send_json object_list
496 # Caveat: this is highly dependent on the proxy setup. YMMV.
497 if request.headers.has_key?('HTTP_X_REAL_IP') then
498 # We're behind a reverse proxy
499 @remote_ip = request.headers['HTTP_X_REAL_IP']
501 # Hopefully, we are not!
502 @remote_ip = request.env['REMOTE_ADDR']
506 def load_required_parameters
507 (self.class.send "_#{params[:action]}_requires_parameters" rescue {}).
509 if info[:required] and not params.include?(key)
510 raise ArgumentError.new("#{key} parameter is required")
511 elsif info[:type] == 'boolean'
512 # Make sure params[key] is either true or false -- not a
513 # string, not nil, etc.
514 if not params.include?(key)
515 params[key] = info[:default]
516 elsif [false, 'false', '0', 0].include? params[key]
518 elsif [true, 'true', '1', 1].include? params[key]
521 raise TypeError.new("#{key} parameter must be a boolean, true or false")
528 def self._create_requires_parameters
530 ensure_unique_name: {
532 description: "Adjust name to ensure uniqueness instead of returning an error on (owner_uuid, name) collision.",
540 def self._index_requires_parameters
542 filters: { type: 'array', required: false },
543 where: { type: 'object', required: false },
544 order: { type: 'array', required: false },
545 select: { type: 'array', required: false },
546 distinct: { type: 'boolean', required: false },
547 limit: { type: 'integer', required: false, default: DEFAULT_LIMIT },
548 offset: { type: 'integer', required: false, default: 0 },
552 def client_accepts_plain_text_stream
553 (request.headers['Accept'].split(' ') &
554 ['text/plain', '*/*']).count > 0
559 response = opts.first[:json]
560 if response.is_a?(Hash) &&
562 Thread.current[:request_starttime]
563 response[:_profile] = {
564 request_time: Time.now - Thread.current[:request_starttime]
572 return Rails.configuration.arvados_theme