class ActionDispatch::ExceptionWrapper

Attributes

env[R]
exception[R]
file[R]
line_number[R]

Public Class Methods

new(env, exception) click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 32
def initialize(env, exception)
  @env = env
  @exception = original_exception(exception)

  expand_backtrace if exception.is_a?(SyntaxError) || exception.try(:original_exception).try(:is_a?, SyntaxError)
end
status_code_for_exception(class_name) click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 59
def self.status_code_for_exception(class_name)
  Rack::Utils.status_code(@@rescue_responses[class_name])
end

Public Instance Methods

application_trace() click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 47
def application_trace
  clean_backtrace(:silent)
end
framework_trace() click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 51
def framework_trace
  clean_backtrace(:noise)
end
full_trace() click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 55
def full_trace
  clean_backtrace(:all)
end
rescue_template() click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 39
def rescue_template
  @@rescue_templates[@exception.class.name]
end
source_extract() click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 63
def source_extract
  if application_trace && trace = application_trace.first
    file, line, _ = trace.split(":")
    @file = file
    @line_number = line.to_i
    source_fragment(@file, @line_number)
  end
end
status_code() click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 43
def status_code
  self.class.status_code_for_exception(@exception.class.name)
end

Private Instance Methods

backtrace_cleaner() click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 94
def backtrace_cleaner
  @backtrace_cleaner ||= @env['action_dispatch.backtrace_cleaner']
end
clean_backtrace(*args) click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 86
def clean_backtrace(*args)
  if backtrace_cleaner
    backtrace_cleaner.clean(@exception.backtrace, *args)
  else
    @exception.backtrace
  end
end
expand_backtrace() click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 110
def expand_backtrace
  @exception.backtrace.unshift(
    @exception.to_s.split("\n")
  ).flatten!
end
original_exception(exception) click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 74
def original_exception(exception)
  if registered_original_exception?(exception)
    exception.original_exception
  else
    exception
  end
end
registered_original_exception?(exception) click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 82
def registered_original_exception?(exception)
  exception.respond_to?(:original_exception) && @@rescue_responses.has_key?(exception.original_exception.class.name)
end
source_fragment(path, line) click to toggle source
# File lib/action_dispatch/middleware/exception_wrapper.rb, line 98
def source_fragment(path, line)
  return unless Rails.respond_to?(:root) && Rails.root
  full_path = Rails.root.join(path)
  if File.exist?(full_path)
    File.open(full_path, "r") do |file|
      start = [line - 3, 0].max
      lines = file.each_line.drop(start).take(6)
      Hash[*(start+1..(lines.count+start)).zip(lines).flatten]
    end
  end
end