module ApiTemplateOverride
def allowed_to_render?(fieldset, field, model, options)
+ return false if !super
if options[:select]
- return options[:select].include? field.to_s
+ options[:select].include? field.to_s
+ else
+ true
end
- super
end
end
include LoadParam
include RecordFilters
- ERROR_ACTIONS = [:render_error, :render_not_found]
-
-
respond_to :json
protect_from_forgery
+ ERROR_ACTIONS = [:render_error, :render_not_found]
+
+ before_filter :set_cors_headers
before_filter :respond_with_json_by_default
before_filter :remote_ip
before_filter :load_read_auths
before_filter :catch_redirect_hint
before_filter(:find_object_by_uuid,
except: [:index, :create] + ERROR_ACTIONS)
+ before_filter :load_required_parameters
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]
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 default_url_options
+ if Rails.configuration.host
+ {:host => Rails.configuration.host}
+ else
+ {}
+ end
+ end
+
def index
@objects.uniq!(&:id) if @select.nil? or @select.include? "id"
if params[:eager] and params[:eager] != '0' and params[:eager] != 0 and params[:eager] != ''
end
def show
- render json: @object.as_api_response
+ send_json @object.as_api_response(nil, select: @select)
end
def create
@object = model_class.new resource_attrs
- @object.save!
+
+ if @object.respond_to? :name and params[:ensure_unique_name]
+ # Record the original name. See below.
+ name_stem = @object.name
+ counter = 1
+ end
+
+ begin
+ @object.save!
+ rescue ActiveRecord::RecordNotUnique => rn
+ raise unless params[:ensure_unique_name]
+
+ # Dig into the error to determine if it is specifically calling out a
+ # (owner_uuid, name) uniqueness violation. In this specific case, and
+ # the client requested a unique name with ensure_unique_name==true,
+ # update the name field and try to save again. Loop as necessary to
+ # discover a unique name. It is necessary to handle name choosing at
+ # this level (as opposed to the client) to ensure that record creation
+ # never fails due to a race condition.
+ raise unless rn.original_exception.is_a? PG::UniqueViolation
+
+ # Unfortunately ActiveRecord doesn't abstract out any of the
+ # necessary information to figure out if this the error is actually
+ # the specific case where we want to apply the ensure_unique_name
+ # behavior, so the following code is specialized to Postgres.
+ err = rn.original_exception
+ detail = err.result.error_field(PG::Result::PG_DIAG_MESSAGE_DETAIL)
+ raise unless /^Key \(owner_uuid, name\)=\([a-z0-9]{5}-[a-z0-9]{5}-[a-z0-9]{15}, .*?\) already exists\./.match detail
+
+ # OK, this exception really is just a unique name constraint
+ # violation, and we've been asked to ensure_unique_name.
+ counter += 1
+ @object.uuid = nil
+ @object.name = "#{name_stem} (#{counter})"
+ redo
+ end while false
show
end
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
if e.respond_to? :backtrace and e.backtrace
logger.error e.backtrace.collect { |x| x + "\n" }.join('')
end
- if @object and @object.errors and @object.errors.full_messages and not @object.errors.full_messages.empty?
+ if (@object.respond_to? :errors and
+ @object.errors.andand.full_messages.andand.any?)
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}"
+ send_json err, status: status
+ end
+
+ def send_json response, opts={}
+ # The obvious render(json: ...) forces a slow JSON encoder. See
+ # #3021 and commit logs. Might be fixed in Rails 4.1.
+ render({
+ text: Oj.dump(response, mode: :compat).html_safe,
+ content_type: 'application/json'
+ }.merge opts)
+ end
+
+ def self.limit_index_columns_read
+ # This method returns a list of column names.
+ # If an index request reads that column from the database,
+ # find_objects_for_index will only fetch objects until it reads
+ # max_index_database_read bytes of data from those columns.
+ []
+ end
+
def find_objects_for_index
@objects ||= model_class.readable_by(*@read_users)
apply_where_limit_order_params
+ limit_database_read if (action_name == "index")
end
- def apply_where_limit_order_params
- ar_table_name = @objects.table_name
-
- ft = record_filters @filters, ar_table_name
+ def apply_filters model_class=nil
+ model_class ||= self.model_class
+ ft = record_filters @filters, model_class
if ft[:cond_out].any?
- @objects = @objects.where(ft[:cond_out].join(' AND '), *ft[:param_out])
+ @objects = @objects.where('(' + ft[:cond_out].join(') AND (') + ')',
+ *ft[:param_out])
end
+ end
+
+ def apply_where_limit_order_params model_class=nil
+ model_class ||= self.model_class
+ apply_filters model_class
+ ar_table_name = @objects.table_name
if @where.is_a? Hash and @where.any?
conditions = ['1=1']
@where.each do |attr,value|
end
end
- @objects = @objects.select(@select.map { |s| "#{table_name}.#{ActiveRecord::Base.connection.quote_column_name s.to_s}" }.join ", ") if @select
+ if @select
+ unless action_name.in? %w(create update destroy)
+ # 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.
+ columns_list = model_class.columns_for_attributes(@select).
+ map { |s| "#{ar_table_name}.#{ActiveRecord::Base.connection.quote_column_name s}" }
+ @objects = @objects.select(columns_list.join(", "))
+ end
+
+ # 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.
+ # (This is harmless, given that clients can deduce what they're
+ # looking at by the returned UUID anyway.)
+ @select |= ["kind"]
+ 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 limit_database_read
+ limit_columns = self.class.limit_index_columns_read
+ limit_columns &= model_class.columns_for_attributes(@select) if @select
+ return if limit_columns.empty?
+ model_class.transaction do
+ limit_query = @objects.
+ except(:select).
+ select("(%s) as read_length" %
+ limit_columns.map { |s| "octet_length(#{s})" }.join(" + "))
+ new_limit = 0
+ read_total = 0
+ limit_query.find_each do |record|
+ new_limit += 1
+ read_total += record.read_length.to_i
+ break if ((read_total >= Rails.configuration.max_index_database_read) or
+ (new_limit >= @limit))
+ end
+ @limit = new_limit
+ @objects = @objects.limit(@limit)
+ # Force @objects to run its query inside this transaction.
+ @objects.each { |_| break }
+ end
+ end
+
def resource_attrs
return @attrs if @attrs
@attrs = params[resource_name]
def require_login
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
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
if @read_auths.empty?
if require_login != false
- render :json => { errors: ['Forbidden'] }.to_json, status: 403
+ send_error("Forbidden", status: 403)
end
false
end
end
+ def set_cors_headers
+ response.headers['Access-Control-Allow-Origin'] = '*'
+ response.headers['Access-Control-Allow-Methods'] = 'GET, HEAD, PUT, POST, DELETE'
+ response.headers['Access-Control-Allow-Headers'] = 'Authorization'
+ response.headers['Access-Control-Max-Age'] = '86486400'
+ end
+
def respond_with_json_by_default
html_index = request.accepts.index(Mime::HTML)
if html_index.nil? or request.accepts[0...html_index].include?(Mime::JSON)
end
accept_param_as_json :reader_tokens, Array
- def render_list
- @object_list = {
+ def object_list
+ list = {
:kind => "arvados##{(@response_resource_name || resource_name).camelize(:lower)}List",
:etag => "",
:self_link => "",
:items => @objects.as_api_response(nil, {select: @select})
}
if @objects.respond_to? :except
- @object_list[:items_available] = @objects.
+ list[:items_available] = @objects.
except(:limit).except(:offset).
count(:id, distinct: true)
end
- render json: @object_list
+ list
+ end
+
+ def render_list
+ send_json object_list
end
def remote_ip
end
end
+ def load_required_parameters
+ (self.class.send "_#{params[:action]}_requires_parameters" rescue {}).
+ each do |key, info|
+ if info[:required] and not params.include?(key)
+ raise ArgumentError.new("#{key} parameter is required")
+ elsif info[:type] == 'boolean'
+ # Make sure params[key] is either true or false -- not a
+ # string, not nil, etc.
+ if not params.include?(key)
+ params[key] = info[:default]
+ elsif [false, 'false', '0', 0].include? params[key]
+ params[key] = false
+ elsif [true, 'true', '1', 1].include? params[key]
+ params[key] = true
+ else
+ raise TypeError.new("#{key} parameter must be a boolean, true or false")
+ end
+ end
+ end
+ true
+ end
+
+ def self._create_requires_parameters
+ {
+ ensure_unique_name: {
+ type: "boolean",
+ description: "Adjust name to ensure uniqueness instead of returning an error on (owner_uuid, name) collision.",
+ location: "query",
+ required: false,
+ default: false
+ }
+ }
+ end
+
def self._index_requires_parameters
{
filters: { type: 'array', required: false },
projects / arvados.git / blobdiff