Class: Utopia::Redirector

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

Constant Summary collapse

DIRECTORY_INDEX =

This redirects directories to the directory + ‘index’

[/^(.*)\/$/, lambda{|prefix| [307, {HTTP::LOCATION => "#{prefix}index"}, []]}].freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(app, **options) ⇒ Redirector

Returns a new instance of Redirector.



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# File 'lib/utopia/redirector.rb', line 91

def initialize(app, **options)
	@app = app

	@strings = options[:strings] || {}
	@patterns = options[:patterns] || []

	@patterns.collect! do |rule|
		if Symbol === rule[0]
			self.class.send(*rule)
		else
			rule
		end
	end

	@strings = normalize_strings(@strings)
	@patterns = normalize_patterns(@patterns)

	@errors = options[:errors]
	
	self.freeze
end

Class Method Details

.moved(source_root, destination_root) ⇒ Object

Redirects a whole source tree to a destination tree, given by the roots.



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# File 'lib/utopia/redirector.rb', line 43

def self.moved(source_root, destination_root)
	return [
		/^#{Regexp.escape(source_root)}(.*)$/,
		lambda do |match|
			[301, {HTTP::LOCATION => (destination_root + match[1]).to_s}, []]
		end
	]
end

.starts_with(source_root, destination_uri) ⇒ Object 



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# File 'lib/utopia/redirector.rb', line 52

def self.starts_with(source_root, destination_uri)
	return [
		/^#{Regexp.escape(source_root)}/,
		destination_uri
	]
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/utopia/redirector.rb', line 129

def call(env)
	base_path = env[Rack::PATH_INFO]

	if uri = @strings[base_path]
		return redirect(@strings[base_path], base_path)
	end

	@patterns.each do |pattern, uri|
		if match_data = pattern.match(base_path)
			result = redirect(uri, match_data)

			return result if result != nil
		end
	end

	response = @app.call(env)

	if @errors && response[0] >= 400 && uri = @errors[response[0]]
		error_request = env.merge(Rack::PATH_INFO => uri, Rack::REQUEST_METHOD => Rack::GET)
		error_response = @app.call(error_request)

		if error_response[0] >= 400
			raise FailedRequestError.new(env[Rack::PATH_INFO], response[0], uri, 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/redirector.rb', line 113

def freeze
	@strings.freeze
	@patterns.freeze
	@errors.freeze
	
	super
end

#redirect(uri, match_data) ⇒ Object 



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# File 'lib/utopia/redirector.rb', line 121

def redirect(uri, match_data)
	if uri.respond_to? :call
		return uri.call(match_data)
	else
		return [301, {HTTP::LOCATION => uri.to_s}, []]
	end
end