class Grape::Middleware::Error

Public Instance Methods

call!(env) click to toggle source
# File lib/grape/middleware/error.rb, line 21
def call!(env)
  @env = env

  begin
    error_response(catch(:error){
      return @app.call(@env)
    })
  rescue Exception => e
    is_rescuable = rescuable?(e.class)
    if e.is_a?(Grape::Exceptions::Base) && !is_rescuable
      handler = lambda {|e| error_response(e) }
    else
      raise unless is_rescuable
      handler = options[:rescue_handlers][e.class] || options[:rescue_handlers][:all]
    end
    handler.nil? ? handle_error(e) : self.instance_exec(e, &handler)
  end
end
default_options() click to toggle source
# File lib/grape/middleware/error.rb, line 7
def default_options
  {
    :default_status => 403, # default status returned on error
    :default_message => "",
    :format => :txt,
    :formatters => {},
    :error_formatters => {},
    :rescue_all => false, # true to rescue all exceptions
    :rescue_options => { :backtrace => false }, # true to display backtrace
    :rescue_handlers => {}, # rescue handler blocks
    :rescued_errors => []
  }
end
error_response(error = {}) click to toggle source
# File lib/grape/middleware/error.rb, line 48
def error_response(error = {})
  status = error[:status] || options[:default_status]
  message = error[:message] || options[:default_message]
  headers = {'Content-Type' => content_type}
  headers.merge!(error[:headers]) if error[:headers].is_a?(Hash)
  backtrace = error[:backtrace] || []
  rack_response(format_message(message, backtrace), status, headers)
end
format_message(message, backtrace) click to toggle source
# File lib/grape/middleware/error.rb, line 61
def format_message(message, backtrace)
  format = env['api.format'] || options[:format]
  formatter = Grape::ErrorFormatter::Base.formatter_for(format, options)
  throw :error, :status => 406, :message => "The requested format '#{format}' is not supported." unless formatter
  formatter.call(message, backtrace, options, env)
end
handle_error(e) click to toggle source
# File lib/grape/middleware/error.rb, line 44
def handle_error(e)
  error_response({ :message => e.message, :backtrace => e.backtrace })
end
rack_response(message, status = options[:default_status], headers = { 'Content-Type' => content_type }) click to toggle source
# File lib/grape/middleware/error.rb, line 57
def rack_response(message, status = options[:default_status], headers = { 'Content-Type' => content_type })
  Rack::Response.new([ message ], status, headers).finish
end
rescuable?(klass) click to toggle source
# File lib/grape/middleware/error.rb, line 40
def rescuable?(klass)
  options[:rescue_all] || (options[:rescued_errors] || []).include?(klass)
end