OpenProject is the leading open source project management software.
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openproject/lib/api/utilities/grape_helper.rb

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#-- encoding: UTF-8
#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2017 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2017 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# See doc/COPYRIGHT.rdoc for more details.
#++
module API
module Utilities
module GrapeHelper
##
# We need this to be able to use `Grape::Middleware::Error#error_response`
# outside of the Grape context. We use it outside of the Grape context because
# OpenProject authentication happens in a middleware upstream of Grape.
class GrapeError < Grape::Middleware::Error
def initialize(env)
@env = env
@options = {}
end
end
def grape_error_for(env, api)
GrapeError.new(env).tap do |e|
e.options[:content_types] = api.content_types
e.options[:format] = 'hal+json'
end
end
def error_response(rescued_error, error = nil, rescue_subclasses: nil, headers: ->() { {} }, log: true)
error_response_lambda = default_error_response(headers, log)
response =
if error.nil?
error_response_lambda
else
lambda { instance_exec error, &error_response_lambda }
end
# We do this lambda business because #rescue_from behaves differently
# depending on the number of parameters the passed block accepts.
rescue_from rescued_error, rescue_subclasses: rescue_subclasses, &response
end
def default_error_response(headers, log)
lambda { |e|
representer = ::API::V3::Errors::ErrorRepresenter.new e
resp_headers = instance_exec &headers
env['api.format'] = 'hal+json'
if log
message = <<-MESSAGE
Grape rescuing from error: #{e}
Original error: #{$!.inspect}
Stacktrace:
MESSAGE
$@.each do |line|
message << "\n #{line}"
end
Rails.logger.error message
end
error_response status: e.code, message: representer.to_json, headers: resp_headers
}
end
end
end
end