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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
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, exceptions_app = nil)
if [true, false].include?(exceptions_app)
ActiveSupport::Deprecation.warn "Passing consider_all_requests_local option to ActionDispatch::ShowExceptions middleware no longer works"
exceptions_app = nil
end
if exceptions_app.nil?
raise ArgumentError, "You need to pass an exceptions_app when initializing ActionDispatch::ShowExceptions. " \
"In case you want to render pages from a public path, you can use ActionDispatch::PublicExceptions.new('path/to/public')"
end
@app = app
@exceptions_app = exceptions_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(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(env, exception)
wrapper = ExceptionWrapper.new(env, exception)
env["action_dispatch.exception"] = wrapper.exception
env["PATH_INFO"] = "/#{wrapper.status_code}"
@exceptions_app.call(env)
rescue Exception => failsafe_error
$stderr.puts "Error during failsafe response: #{failsafe_error}\n #{failsafe_error.backtrace * "\n "}"
FAILSAFE_RESPONSE
end
end
end
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