Class: Utopia::Redirection::Errors

Inherits:
Object
  • Object
show all
Defined in:
lib/utopia/redirection.rb

Overview

A middleware which performs internal redirects based on error status codes.

Instance Method Summary collapse

Constructor Details

#initialize(app, codes = {}) ⇒ Errors

Returns a new instance of Errors.

Parameters:

  • codes (Hash<Integer,String>) (defaults to: {}) —

    The redirection path for a given error code.



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# File 'lib/utopia/redirection.rb', line 44

def initialize(app, codes = {})
	@app = app
	@codes = codes
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/utopia/redirection.rb', line 61

def call(env)
	response = @app.call(env)
	
	if unhandled_error?(response) && location = @codes[response[0]]
		error_request = env.merge(Rack::PATH_INFO => location, Rack::REQUEST_METHOD => Rack::GET)
		error_response = @app.call(error_request)

		if error_response[0] >= 400
			raise RequestFailure.new(env[Rack::PATH_INFO], response[0], location, error_response[0])
		else
			# Feed the error code back with the error document:
			error_response[0] = response[0]
			return error_response
		end
	else
		return response
	end
end

#freeze ⇒ Object 



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# File 'lib/utopia/redirection.rb', line 49

def freeze
	return self if frozen?
	
	@codes.freeze
	
	super
end

#unhandled_error?(response) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/utopia/redirection.rb', line 57

def unhandled_error?(response)
	response[0] >= 400 && response[1].empty?
end