Created
November 30, 2016 19:26
-
-
Save barnes7td/c717f89bba81f00db1732f79011575f5 to your computer and use it in GitHub Desktop.
For learning
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
require 'action_dispatch/journey/core-ext/hash' | |
require 'action_dispatch/journey/router/utils' | |
require 'action_dispatch/journey/router/strexp' | |
require 'action_dispatch/journey/routes' | |
require 'action_dispatch/journey/formatter' | |
before = $-w | |
$-w = false | |
require 'action_dispatch/journey/parser' | |
$-w = before | |
require 'action_dispatch/journey/route' | |
require 'action_dispatch/journey/path/pattern' | |
module ActionDispatch | |
module Journey | |
class Router | |
class RoutingError < ::StandardError | |
end | |
VERSION = '2.0.0' | |
class NullReq # :nodoc: | |
attr_reader :env | |
def initialize env | |
@env = env | |
end | |
def request_method | |
env['REQUEST_METHOD'] | |
end | |
def path_info | |
env['PATH_INFO'] | |
end | |
def ip | |
env['REMOTE_ADDR'] | |
end | |
def [](k); env[k]; end | |
end | |
attr_reader :request_class, :formatter | |
attr_accessor :routes | |
def initialize routes, options | |
@options = options | |
@params_key = options[:parameters_key] | |
@request_class = options[:request_class] || NullReq | |
@routes = routes | |
end | |
def call env | |
env['PATH_INFO'] = Utils.normalize_path env['PATH_INFO'] | |
find_routes(env).each do |match, parameters, route| | |
script_name, path_info, set_params = env.values_at('SCRIPT_NAME', | |
'PATH_INFO', | |
@params_key) | |
unless route.path.anchored | |
env['SCRIPT_NAME'] = (script_name.to_s + match.to_s).chomp('/') | |
env['PATH_INFO'] = match.post_match | |
end | |
env[@params_key] = (set_params || {}).merge parameters | |
status, headers, body = route.app.call(env) | |
if 'pass' == headers['X-Cascade'] | |
env['SCRIPT_NAME'] = script_name | |
env['PATH_INFO'] = path_info | |
env[@params_key] = set_params | |
next | |
end | |
return [status, headers, body] | |
end | |
return [404, {'X-Cascade' => 'pass'}, ['Not Found']] | |
end | |
def recognize req | |
find_routes(req.env).each do |match, parameters, route| | |
unless route.path.anchored | |
req.env['SCRIPT_NAME'] = match.to_s | |
req.env['PATH_INFO'] = match.post_match.sub(/^([^\/])/, '/\1') | |
end | |
yield(route, nil, parameters) | |
end | |
end | |
def visualizer | |
tt = GTG::Builder.new(ast).transition_table | |
groups = partitioned_routes.first.map(&:ast).group_by { |a| a.to_s } | |
asts = groups.values.map { |v| v.first } | |
tt.visualizer asts | |
end | |
private | |
def partitioned_routes | |
routes.partitioned_routes | |
end | |
def ast | |
routes.ast | |
end | |
def simulator | |
routes.simulator | |
end | |
def custom_routes | |
partitioned_routes.last | |
end | |
def filter_routes path | |
return [] unless ast | |
data = simulator.match(path) | |
data ? data.memos : [] | |
end | |
def find_routes env | |
req = request_class.new env | |
routes = filter_routes(req.path_info).concat custom_routes.find_all { |r| | |
r.path.match(req.path_info) | |
} | |
routes.concat get_routes_as_head(routes) | |
routes.sort_by!(&:precedence).select! { |r| | |
r.constraints.all? { |k,v| v === req.send(k) } && | |
r.verb === req.request_method | |
} | |
routes.reject! { |r| req.ip && !(r.ip === req.ip) } | |
routes.map! { |r| | |
match_data = r.path.match(req.path_info) | |
match_names = match_data.names.map { |n| n.to_sym } | |
match_values = match_data.captures.map { |v| v && Utils.unescape_uri(v) } | |
info = Hash[match_names.zip(match_values).find_all { |_,y| y }] | |
[match_data, r.defaults.merge(info), r] | |
} | |
end | |
def get_routes_as_head(routes) | |
precedence = (routes.map(&:precedence).max || 0) + 1 | |
routes = routes.select { |r| | |
r.verb === "GET" && !(r.verb === "HEAD") | |
}.map! { |r| | |
Route.new(r.name, | |
r.app, | |
r.path, | |
r.conditions.merge(:request_method => "HEAD"), | |
r.defaults).tap do |route| | |
route.precedence = r.precedence + precedence | |
end | |
} | |
routes.flatten! | |
routes | |
end | |
end | |
end | |
end |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment