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require 'action_dispatch/http/request'
require 'action_dispatch/middleware/exception_wrapper'
require 'active_support/deprecation'
module ActionDispatch
# This middleware rescues any exception returned by the application
# and wraps them in a format for the end user.
class ShowExceptions
RESCUES_TEMPLATE_PATH = File.join(File.dirname(__FILE__), 'templates')
FAILSAFE_RESPONSE = [500, {'Content-Type' => 'text/html'},
["<html><body><h1>500 Internal Server Error</h1>" <<
"If you are the administrator of this website, then please read this web " <<
"application's log file and/or the web server's log file to find out what " <<
"went wrong.</body></html>"]]
class << self
def rescue_responses
ActiveSupport::Deprecation.warn "ActionDispatch::ShowExceptions.rescue_responses is deprecated. " \
"Please configure your exceptions using a railtie or in your application config instead."
ExceptionWrapper.rescue_responses
end
def rescue_templates
ActiveSupport::Deprecation.warn "ActionDispatch::ShowExceptions.rescue_templates is deprecated. " \
"Please configure your exceptions using a railtie or in your application config instead."
ExceptionWrapper.rescue_templates
end
end
def initialize(app, consider_all_requests_local = nil)
ActiveSupport::Deprecation.warn "Passing consider_all_requests_local option to ActionDispatch::ShowExceptions middleware no longer works" unless consider_all_requests_local.nil?
@app = app
end
def call(env)
begin
response = @app.call(env)
rescue Exception => exception
raise exception if env['action_dispatch.show_exceptions'] == false
end
response || render_exception_with_failsafe(env, exception)
end
private
# Define this method because some plugins were monkey patching it.
# Remove this after 3.2 is out with the other deprecations in this class.
def status_code(*)
end
def render_exception_with_failsafe(env, exception)
render_exception(env, exception)
rescue Exception => failsafe_error
$stderr.puts "Error during failsafe response: #{failsafe_error}\n #{failsafe_error.backtrace * "\n "}"
FAILSAFE_RESPONSE
end
def render_exception(env, exception)
wrapper = ExceptionWrapper.new(env, exception)
status = wrapper.status_code
locale_path = "#{public_path}/#{status}.#{I18n.locale}.html" if I18n.locale
path = "#{public_path}/#{status}.html"
if locale_path && File.exist?(locale_path)
render(status, File.read(locale_path))
elsif File.exist?(path)
render(status, File.read(path))
else
render(status, '')
end
end
def render(status, body)
[status, {'Content-Type' => "text/html; charset=#{Response.default_charset}", 'Content-Length' => body.bytesize.to_s}, [body]]
end
# TODO: Make this a middleware initialization parameter once
# we removed the second option (which is deprecated)
def public_path
defined?(Rails.public_path) ? Rails.public_path : 'public_path'
end
end
end
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