109 lines
3.3 KiB
Ruby
109 lines
3.3 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class RouteMatcher
|
|
PATH_PARAMETERS ||= "_DISCOURSE_REQUEST_PATH_PARAMETERS"
|
|
|
|
attr_reader :actions, :params, :methods, :aliases, :formats, :allowed_param_values
|
|
|
|
def initialize(
|
|
actions: nil,
|
|
params: nil,
|
|
methods: nil,
|
|
formats: nil,
|
|
aliases: nil,
|
|
allowed_param_values: nil
|
|
)
|
|
@actions = Array(actions) if actions
|
|
@params = Array(params) if params
|
|
@methods = Array(methods) if methods
|
|
@formats = Array(formats) if formats
|
|
@aliases = aliases
|
|
@allowed_param_values = allowed_param_values
|
|
end
|
|
|
|
# Return an identical route matcher, with the allowed_param_values replaced
|
|
def with_allowed_param_values(new_allowed_param_values)
|
|
RouteMatcher.new(
|
|
actions: actions,
|
|
params: params,
|
|
methods: methods,
|
|
formats: formats,
|
|
aliases: aliases,
|
|
allowed_param_values: new_allowed_param_values,
|
|
)
|
|
end
|
|
|
|
def match?(env:)
|
|
request = ActionDispatch::Request.new(env)
|
|
|
|
action_allowed?(request) && params_allowed?(request) && method_allowed?(request) &&
|
|
format_allowed?(request)
|
|
end
|
|
|
|
private
|
|
|
|
def action_allowed?(request)
|
|
return true if actions.nil? # actions are unrestricted
|
|
|
|
# message_bus is not a rails route, special handling
|
|
return true if actions.include?("message_bus") && request.fullpath =~ %r{^/message-bus/.*/poll}
|
|
|
|
path_params = path_params_from_request(request)
|
|
actions.include? "#{path_params[:controller]}##{path_params[:action]}"
|
|
end
|
|
|
|
def params_allowed?(request)
|
|
return true if params.nil? || allowed_param_values.blank? # params are unrestricted
|
|
|
|
requested_params = request.parameters
|
|
|
|
params.all? do |param|
|
|
param_alias = aliases&.[](param)
|
|
allowed_values = [allowed_param_values.fetch(param.to_s, [])].flatten
|
|
|
|
value = requested_params[param.to_s]
|
|
alias_value = requested_params[param_alias.to_s]
|
|
|
|
return false if value.present? && alias_value.present?
|
|
|
|
value = value || alias_value
|
|
value = extract_category_id(value) if param_alias == :category_slug_path_with_id
|
|
|
|
allowed_values.blank? || allowed_values.include?(value)
|
|
end
|
|
end
|
|
|
|
def extract_category_id(category_slug_with_id)
|
|
parts = category_slug_with_id.split("/")
|
|
!parts.empty? && parts.last =~ /\A\d+\Z/ ? parts.pop : nil
|
|
end
|
|
|
|
def method_allowed?(request)
|
|
return true if methods.nil?
|
|
request_method = request.request_method&.downcase&.to_sym
|
|
methods.include?(request_method)
|
|
end
|
|
|
|
def format_allowed?(request)
|
|
return true if formats.nil?
|
|
request_format = request.formats&.first&.symbol
|
|
formats.include?(request_format)
|
|
end
|
|
|
|
def path_params_from_request(request)
|
|
if request.env[ActionDispatch::Http::Parameters::PARAMETERS_KEY].nil?
|
|
# We need to manually recognize the path when Rails hasn't done that yet. That can happen when
|
|
# the matcher gets called in a Middleware before the controller did its work.
|
|
# We store the result of `recognize_path` in a custom env key, so that we don't change
|
|
# some Rails behavior by accident.
|
|
request.env[PATH_PARAMETERS] ||= begin
|
|
Rails.application.routes.recognize_path(request.path_info)
|
|
rescue ActionController::RoutingError
|
|
{}
|
|
end
|
|
end
|
|
|
|
request.path_parameters.presence || request.env[PATH_PARAMETERS] || {}
|
|
end
|
|
end
|