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Diffstat (limited to 'actionpack/lib/action_dispatch/routing/redirection.rb')
| -rw-r--r-- | actionpack/lib/action_dispatch/routing/redirection.rb | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/routing/redirection.rb b/actionpack/lib/action_dispatch/routing/redirection.rb new file mode 100644 index 0000000000..804991ad5f --- /dev/null +++ b/actionpack/lib/action_dispatch/routing/redirection.rb @@ -0,0 +1,110 @@ +require 'action_dispatch/http/request' + +module ActionDispatch + module Routing + module Redirection + + # Redirect any path to another path: + # + # match "/stories" => redirect("/posts") + # + # You can also use interpolation in the supplied redirect argument: + # + # match 'docs/:article', :to => redirect('/wiki/%{article}') + # + # Alternatively you can use one of the other syntaxes: + # + # The block version of redirect allows for the easy encapsulation of any logic associated with + # the redirect in question. Either the params and request are supplied as arguments, or just + # params, depending of how many arguments your block accepts. A string is required as a + # return value. + # + # match 'jokes/:number', :to => redirect do |params, request| + # path = (params[:number].to_i.even? ? "/wheres-the-beef" : "/i-love-lamp") + # "http://#{request.host_with_port}/#{path}" + # end + # + # The options version of redirect allows you to supply only the parts of the url which need + # to change, it also supports interpolation of the path similar to the first example. + # + # match 'stores/:name', :to => redirect(:subdomain => 'stores', :path => '/%{name}') + # match 'stores/:name(*all)', :to => redirect(:subdomain => 'stores', :path => '/%{name}%{all}') + # + # Finally, an object which responds to call can be supplied to redirect, allowing you to reuse + # common redirect routes. The call method must accept two arguments, params and request, and return + # a string. + # + # match 'accounts/:name' => redirect(SubdomainRedirector.new('api')) + # + def redirect(*args, &block) + options = args.last.is_a?(Hash) ? args.pop : {} + status = options.delete(:status) || 301 + + path = args.shift + + path_proc = if path.is_a?(String) + proc { |params| (params.empty? || !path.match(/%\{\w*\}/)) ? path : (path % params) } + elsif options.any? + options_proc(options) + elsif path.respond_to?(:call) + proc { |params, request| path.call(params, request) } + elsif block + block + else + raise ArgumentError, "redirection argument not supported" + end + + redirection_proc(status, path_proc) + end + + private + + def options_proc(options) + proc do |params, request| + path = if options[:path].nil? + request.path + elsif params.empty? || !options[:path].match(/%\{\w*\}/) + options.delete(:path) + else + (options.delete(:path) % params) + end + + default_options = { + :protocol => request.protocol, + :host => request.host, + :port => request.optional_port, + :path => path, + :params => request.query_parameters + } + + ActionDispatch::Http::URL.url_for(options.reverse_merge(default_options)) + end + end + + def redirection_proc(status, path_proc) + lambda do |env| + req = Request.new(env) + + params = [req.symbolized_path_parameters] + params << req if path_proc.arity > 1 + + uri = URI.parse(path_proc.call(*params)) + uri.scheme ||= req.scheme + uri.host ||= req.host + uri.port ||= req.port unless req.standard_port? + + body = %(<html><body>You are being <a href="#{ERB::Util.h(uri.to_s)}">redirected</a>.</body></html>) + + headers = { + 'Location' => uri.to_s, + 'Content-Type' => 'text/html', + 'Content-Length' => body.length.to_s + } + + [ status, headers, [body] ] + end + end + + end + end +end
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