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 :set_cors_headers
29 before_filter :respond_with_json_by_default
30 before_filter :remote_ip
31 before_filter :load_read_auths
32 before_filter :require_auth_scope, except: ERROR_ACTIONS
34 before_filter :catch_redirect_hint
35 before_filter(:find_object_by_uuid,
36 except: [:index, :create] + ERROR_ACTIONS)
37 before_filter :load_required_parameters
38 before_filter :load_limit_offset_order_params, only: [:index, :contents]
39 before_filter :load_where_param, only: [:index, :contents]
40 before_filter :load_filters_param, only: [:index, :contents]
41 before_filter :find_objects_for_index, :only => :index
42 before_filter :reload_object_before_update, :only => :update
43 before_filter(:render_404_if_no_object,
44 except: [:index, :create] + ERROR_ACTIONS)
48 attr_accessor :resource_attrs
51 rescue_from(Exception,
52 ArvadosModel::PermissionDeniedError,
53 :with => :render_error)
54 rescue_from(ActiveRecord::RecordNotFound,
55 ActionController::RoutingError,
56 ActionController::UnknownController,
57 AbstractController::ActionNotFound,
58 :with => :render_not_found)
61 def default_url_options
62 if Rails.configuration.host
63 {:host => Rails.configuration.host}
70 @objects.uniq!(&:id) if @select.nil? or @select.include? "id"
71 if params[:eager] and params[:eager] != '0' and params[:eager] != 0 and params[:eager] != ''
72 @objects.each(&:eager_load_associations)
78 send_json @object.as_api_response(nil, select: @select)
82 @object = model_class.new resource_attrs
84 if @object.respond_to? :name and params[:ensure_unique_name]
85 # Record the original name. See below.
86 name_stem = @object.name
92 rescue ActiveRecord::RecordNotUnique => rn
93 raise unless params[:ensure_unique_name]
95 # Dig into the error to determine if it is specifically calling out a
96 # (owner_uuid, name) uniqueness violation. In this specific case, and
97 # the client requested a unique name with ensure_unique_name==true,
98 # update the name field and try to save again. Loop as necessary to
99 # discover a unique name. It is necessary to handle name choosing at
100 # this level (as opposed to the client) to ensure that record creation
101 # never fails due to a race condition.
102 raise unless rn.original_exception.is_a? PG::UniqueViolation
104 # Unfortunately ActiveRecord doesn't abstract out any of the
105 # necessary information to figure out if this the error is actually
106 # the specific case where we want to apply the ensure_unique_name
107 # behavior, so the following code is specialized to Postgres.
108 err = rn.original_exception
109 detail = err.result.error_field(PG::Result::PG_DIAG_MESSAGE_DETAIL)
110 raise unless /^Key \(owner_uuid, name\)=\([a-z0-9]{5}-[a-z0-9]{5}-[a-z0-9]{15}, .*?\) already exists\./.match detail
112 # OK, this exception really is just a unique name constraint
113 # violation, and we've been asked to ensure_unique_name.
116 @object.name = "#{name_stem} (#{counter})"
123 attrs_to_update = resource_attrs.reject { |k,v|
124 [:kind, :etag, :href].index k
126 @object.update_attributes! attrs_to_update
135 def catch_redirect_hint
137 if params.has_key?('redirect_to') then
138 session[:redirect_to] = params[:redirect_to]
143 def render_404_if_no_object
144 render_not_found "Object not found" if !@object
148 logger.error e.inspect
149 if e.respond_to? :backtrace and e.backtrace
150 logger.error e.backtrace.collect { |x| x + "\n" }.join('')
152 if (@object.respond_to? :errors and
153 @object.errors.andand.full_messages.andand.any?)
154 errors = @object.errors.full_messages
155 logger.error errors.inspect
159 status = e.respond_to?(:http_status) ? e.http_status : 422
160 send_error(*errors, status: status)
163 def render_not_found(e=ActionController::RoutingError.new("Path not found"))
164 logger.error e.inspect
165 send_error("Path not found", status: 404)
170 def send_error(*args)
171 if args.last.is_a? Hash
176 err[:errors] ||= args
177 err[:error_token] = [Time.now.utc.to_i, "%08x" % rand(16 ** 8)].join("+")
178 status = err.delete(:status) || 422
179 logger.error "Error #{err[:error_token]}: #{status}"
180 send_json err, status: status
183 def send_json response, opts={}
184 # The obvious render(json: ...) forces a slow JSON encoder. See
185 # #3021 and commit logs. Might be fixed in Rails 4.1.
187 text: Oj.dump(response, mode: :compat).html_safe,
188 content_type: 'application/json'
192 def self.limit_index_columns_read
193 # This method returns a list of column names.
194 # If an index request reads that column from the database,
195 # find_objects_for_index will only fetch objects until it reads
196 # max_index_database_read bytes of data from those columns.
200 def find_objects_for_index
201 @objects ||= model_class.readable_by(*@read_users)
202 apply_where_limit_order_params
203 limit_database_read if (action_name == "index")
206 def apply_filters model_class=nil
207 model_class ||= self.model_class
208 @objects = model_class.apply_filters(@objects, @filters)
211 def apply_where_limit_order_params model_class=nil
212 model_class ||= self.model_class
213 apply_filters model_class
215 ar_table_name = @objects.table_name
216 if @where.is_a? Hash and @where.any?
218 @where.each do |attr,value|
219 if attr.to_s == 'any'
220 if value.is_a?(Array) and
221 value.length == 2 and
222 value[0] == 'contains' then
224 model_class.searchable_columns('ilike').each do |column|
225 # Including owner_uuid in an "any column" search will
226 # probably just return a lot of false positives.
227 next if column == 'owner_uuid'
228 ilikes << "#{ar_table_name}.#{column} ilike ?"
229 conditions << "%#{value[1]}%"
232 conditions[0] << ' and (' + ilikes.join(' or ') + ')'
235 elsif attr.to_s.match(/^[a-z][_a-z0-9]+$/) and
236 model_class.columns.collect(&:name).index(attr.to_s)
238 conditions[0] << " and #{ar_table_name}.#{attr} is ?"
240 elsif value.is_a? Array
241 if value[0] == 'contains' and value.length == 2
242 conditions[0] << " and #{ar_table_name}.#{attr} like ?"
243 conditions << "%#{value[1]}%"
245 conditions[0] << " and #{ar_table_name}.#{attr} in (?)"
248 elsif value.is_a? String or value.is_a? Fixnum or value == true or value == false
249 conditions[0] << " and #{ar_table_name}.#{attr}=?"
251 elsif value.is_a? Hash
252 # Not quite the same thing as "equal?" but better than nothing?
255 conditions[0] << " and #{ar_table_name}.#{attr} ilike ?"
256 conditions << "%#{k}%#{v}%"
262 if conditions.length > 1
263 conditions[0].sub!(/^1=1 and /, '')
270 unless action_name.in? %w(create update destroy)
271 # Map attribute names in @select to real column names, resolve
272 # those to fully-qualified SQL column names, and pass the
273 # resulting string to the select method.
274 columns_list = model_class.columns_for_attributes(@select).
275 map { |s| "#{ar_table_name}.#{ActiveRecord::Base.connection.quote_column_name s}" }
276 @objects = @objects.select(columns_list.join(", "))
279 # This information helps clients understand what they're seeing
280 # (Workbench always expects it), but they can't select it explicitly
281 # because it's not an SQL column. Always add it.
282 # (This is harmless, given that clients can deduce what they're
283 # looking at by the returned UUID anyway.)
286 @objects = @objects.order(@orders.join ", ") if @orders.any?
287 @objects = @objects.limit(@limit)
288 @objects = @objects.offset(@offset)
289 @objects = @objects.uniq(@distinct) if not @distinct.nil?
292 def limit_database_read
293 limit_columns = self.class.limit_index_columns_read
294 limit_columns &= model_class.columns_for_attributes(@select) if @select
295 return if limit_columns.empty?
296 model_class.transaction do
297 limit_query = @objects.
299 select("(%s) as read_length" %
300 limit_columns.map { |s| "octet_length(#{s})" }.join(" + "))
303 limit_query.each do |record|
305 read_total += record.read_length.to_i
306 if read_total >= Rails.configuration.max_index_database_read
307 new_limit -= 1 if new_limit > 1
309 elsif new_limit >= @limit
314 @objects = @objects.limit(@limit)
315 # Force @objects to run its query inside this transaction.
316 @objects.each { |_| break }
321 return @attrs if @attrs
322 @attrs = params[resource_name]
323 if @attrs.is_a? String
324 @attrs = Oj.strict_load @attrs, symbol_keys: true
326 unless @attrs.is_a? Hash
327 message = "No #{resource_name}"
328 if resource_name.index('_')
329 message << " (or #{resource_name.camelcase(:lower)})"
331 message << " hash provided with request"
332 raise ArgumentError.new(message)
334 %w(created_at modified_by_client_uuid modified_by_user_uuid modified_at).each do |x|
335 @attrs.delete x.to_sym
337 @attrs = @attrs.symbolize_keys if @attrs.is_a? HashWithIndifferentAccess
344 if current_api_client_authorization
345 @read_auths << current_api_client_authorization
347 # Load reader tokens if this is a read request.
348 # If there are too many reader tokens, assume the request is malicious
350 if request.get? and params[:reader_tokens] and
351 params[:reader_tokens].size < 100
352 @read_auths += ApiClientAuthorization
354 .where('api_token IN (?) AND
355 (expires_at IS NULL OR expires_at > CURRENT_TIMESTAMP)',
356 params[:reader_tokens])
359 @read_auths.select! { |auth| auth.scopes_allow_request? request }
360 @read_users = @read_auths.map { |auth| auth.user }.uniq
365 respond_to do |format|
366 format.json { send_error("Not logged in", status: 401) }
367 format.html { redirect_to '/auth/joshid' }
374 unless current_user and current_user.is_admin
375 send_error("Forbidden", status: 403)
379 def require_auth_scope
380 if @read_auths.empty?
381 if require_login != false
382 send_error("Forbidden", status: 403)
389 response.headers['Access-Control-Allow-Origin'] = '*'
390 response.headers['Access-Control-Allow-Methods'] = 'GET, HEAD, PUT, POST, DELETE'
391 response.headers['Access-Control-Allow-Headers'] = 'Authorization'
392 response.headers['Access-Control-Max-Age'] = '86486400'
395 def respond_with_json_by_default
396 html_index = request.accepts.index(Mime::HTML)
397 if html_index.nil? or request.accepts[0...html_index].include?(Mime::JSON)
398 request.format = :json
403 controller_name.classify.constantize
406 def resource_name # params[] key used by client
407 controller_name.singularize
414 def find_object_by_uuid
415 if params[:id] and params[:id].match /\D/
416 params[:uuid] = params.delete :id
418 @where = { uuid: params[:uuid] }
424 find_objects_for_index
425 @object = @objects.first
428 def reload_object_before_update
429 # This is necessary to prevent an ActiveRecord::ReadOnlyRecord
430 # error when updating an object which was retrieved using a join.
431 if @object.andand.readonly?
432 @object = model_class.find_by_uuid(@objects.first.uuid)
436 def load_json_value(hash, key, must_be_class=nil)
437 if hash[key].is_a? String
438 hash[key] = Oj.strict_load(hash[key], symbol_keys: false)
439 if must_be_class and !hash[key].is_a? must_be_class
440 raise TypeError.new("parameter #{key.to_s} must be a #{must_be_class.to_s}")
445 def self.accept_attribute_as_json(attr, must_be_class=nil)
446 before_filter lambda { accept_attribute_as_json attr, must_be_class }
448 accept_attribute_as_json :properties, Hash
449 accept_attribute_as_json :info, Hash
450 def accept_attribute_as_json(attr, must_be_class)
451 if params[resource_name] and resource_attrs.is_a? Hash
452 if resource_attrs[attr].is_a? Hash
453 # Convert symbol keys to strings (in hashes provided by
455 resource_attrs[attr] = resource_attrs[attr].
456 with_indifferent_access.to_hash
458 load_json_value(resource_attrs, attr, must_be_class)
463 def self.accept_param_as_json(key, must_be_class=nil)
464 prepend_before_filter lambda { load_json_value(params, key, must_be_class) }
466 accept_param_as_json :reader_tokens, Array
470 :kind => "arvados##{(@response_resource_name || resource_name).camelize(:lower)}List",
475 :items => @objects.as_api_response(nil, {select: @select})
477 if @objects.respond_to? :except
478 list[:items_available] = @objects.
479 except(:limit).except(:offset).
480 count(:id, distinct: true)
486 send_json object_list
490 # Caveat: this is highly dependent on the proxy setup. YMMV.
491 if request.headers.has_key?('HTTP_X_REAL_IP') then
492 # We're behind a reverse proxy
493 @remote_ip = request.headers['HTTP_X_REAL_IP']
495 # Hopefully, we are not!
496 @remote_ip = request.env['REMOTE_ADDR']
500 def load_required_parameters
501 (self.class.send "_#{params[:action]}_requires_parameters" rescue {}).
503 if info[:required] and not params.include?(key)
504 raise ArgumentError.new("#{key} parameter is required")
505 elsif info[:type] == 'boolean'
506 # Make sure params[key] is either true or false -- not a
507 # string, not nil, etc.
508 if not params.include?(key)
509 params[key] = info[:default]
510 elsif [false, 'false', '0', 0].include? params[key]
512 elsif [true, 'true', '1', 1].include? params[key]
515 raise TypeError.new("#{key} parameter must be a boolean, true or false")
522 def self._create_requires_parameters
524 ensure_unique_name: {
526 description: "Adjust name to ensure uniqueness instead of returning an error on (owner_uuid, name) collision.",
534 def self._index_requires_parameters
536 filters: { type: 'array', required: false },
537 where: { type: 'object', required: false },
538 order: { type: 'array', required: false },
539 select: { type: 'array', required: false },
540 distinct: { type: 'boolean', required: false },
541 limit: { type: 'integer', required: false, default: DEFAULT_LIMIT },
542 offset: { type: 'integer', required: false, default: 0 },
546 def client_accepts_plain_text_stream
547 (request.headers['Accept'].split(' ') &
548 ['text/plain', '*/*']).count > 0
553 response = opts.first[:json]
554 if response.is_a?(Hash) &&
556 Thread.current[:request_starttime]
557 response[:_profile] = {
558 request_time: Time.now - Thread.current[:request_starttime]
566 return Rails.configuration.arvados_theme