diff options
Diffstat (limited to 'actionpack/lib/action_dispatch')
9 files changed, 187 insertions, 68 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/callbacks.rb b/actionpack/lib/action_dispatch/middleware/callbacks.rb index 5b2ad36dd5..87fe19225b 100644 --- a/actionpack/lib/action_dispatch/middleware/callbacks.rb +++ b/actionpack/lib/action_dispatch/middleware/callbacks.rb @@ -24,10 +24,8 @@ module ActionDispatch def call(env) error = nil result = run_callbacks :call do - begin - @app.call(env) - rescue => error - end + @app.call(env) + rescue => error end raise error if error result diff --git a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb index 7669767ae3..61773d97a2 100644 --- a/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb +++ b/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb @@ -3,53 +3,14 @@ require "action_dispatch/http/request" require "action_dispatch/middleware/exception_wrapper" require "action_dispatch/routing/inspector" + require "action_view" require "action_view/base" -require "pp" - module ActionDispatch # This middleware is responsible for logging exceptions and # showing a debugging page in case the request is local. class DebugExceptions - RESCUES_TEMPLATE_PATH = File.expand_path("templates", __dir__) - - class DebugView < ActionView::Base - def debug_params(params) - clean_params = params.clone - clean_params.delete("action") - clean_params.delete("controller") - - if clean_params.empty? - "None" - else - PP.pp(clean_params, +"", 200) - end - end - - def debug_headers(headers) - if headers.present? - headers.inspect.gsub(",", ",\n") - else - "None" - end - end - - def debug_hash(object) - object.to_hash.sort_by { |k, _| k.to_s }.map { |k, v| "#{k}: #{v.inspect rescue $!.message}" }.join("\n") - end - - def render(*) - logger = ActionView::Base.logger - - if logger && logger.respond_to?(:silence) - logger.silence { super } - else - super - end - end - end - cattr_reader :interceptors, instance_accessor: false, default: [] def self.register_interceptor(object = nil, &block) @@ -87,11 +48,9 @@ module ActionDispatch wrapper = ExceptionWrapper.new(backtrace_cleaner, exception) @interceptors.each do |interceptor| - begin - interceptor.call(request, exception) - rescue Exception - log_error(request, wrapper) - end + interceptor.call(request, exception) + rescue Exception + log_error(request, wrapper) end end @@ -152,7 +111,7 @@ module ActionDispatch end def create_template(request, wrapper) - DebugView.new([RESCUES_TEMPLATE_PATH], + DebugView.new( request: request, exception_wrapper: wrapper, exception: wrapper.exception, diff --git a/actionpack/lib/action_dispatch/middleware/debug_view.rb b/actionpack/lib/action_dispatch/middleware/debug_view.rb new file mode 100644 index 0000000000..ac12dc13a1 --- /dev/null +++ b/actionpack/lib/action_dispatch/middleware/debug_view.rb @@ -0,0 +1,50 @@ +# frozen_string_literal: true + +require "pp" + +require "action_view" +require "action_view/base" + +module ActionDispatch + class DebugView < ActionView::Base # :nodoc: + RESCUES_TEMPLATE_PATH = File.expand_path("templates", __dir__) + + def initialize(assigns) + super([RESCUES_TEMPLATE_PATH], assigns) + end + + def debug_params(params) + clean_params = params.clone + clean_params.delete("action") + clean_params.delete("controller") + + if clean_params.empty? + "None" + else + PP.pp(clean_params, +"", 200) + end + end + + def debug_headers(headers) + if headers.present? + headers.inspect.gsub(",", ",\n") + else + "None" + end + end + + def debug_hash(object) + object.to_hash.sort_by { |k, _| k.to_s }.map { |k, v| "#{k}: #{v.inspect rescue $!.message}" }.join("\n") + end + + def render(*) + logger = ActionView::Base.logger + + if logger && logger.respond_to?(:silence) + logger.silence { super } + else + super + end + end + end +end diff --git a/actionpack/lib/action_dispatch/middleware/host_authorization.rb b/actionpack/lib/action_dispatch/middleware/host_authorization.rb new file mode 100644 index 0000000000..447b70112a --- /dev/null +++ b/actionpack/lib/action_dispatch/middleware/host_authorization.rb @@ -0,0 +1,103 @@ +# frozen_string_literal: true + +require "action_dispatch/http/request" + +module ActionDispatch + # This middleware guards from DNS rebinding attacks by white-listing the + # hosts a request can be sent to. + # + # When a request comes to an unauthorized host, the +response_app+ + # application will be executed and rendered. If no +response_app+ is given, a + # default one will run, which responds with +403 Forbidden+. + class HostAuthorization + class Permissions # :nodoc: + def initialize(hosts) + @hosts = sanitize_hosts(hosts) + end + + def empty? + @hosts.empty? + end + + def allows?(host) + @hosts.any? do |allowed| + allowed === host + rescue + # IPAddr#=== raises an error if you give it a hostname instead of + # IP. Treat similar errors as blocked access. + false + end + end + + private + + def sanitize_hosts(hosts) + Array(hosts).map do |host| + case host + when Regexp then sanitize_regexp(host) + when String then sanitize_string(host) + else host + end + end + end + + def sanitize_regexp(host) + /\A#{host}\z/ + end + + def sanitize_string(host) + if host.start_with?(".") + /\A(.+\.)?#{Regexp.escape(host[1..-1])}\z/ + else + host + end + end + end + + DEFAULT_RESPONSE_APP = -> env do + request = Request.new(env) + + format = request.xhr? ? "text/plain" : "text/html" + template = DebugView.new(host: request.host) + body = template.render(template: "rescues/blocked_host", layout: "rescues/layout") + + [403, { + "Content-Type" => "#{format}; charset=#{Response.default_charset}", + "Content-Length" => body.bytesize.to_s, + }, [body]] + end + + def initialize(app, hosts, response_app = nil) + @app = app + @permissions = Permissions.new(hosts) + @response_app = response_app || DEFAULT_RESPONSE_APP + end + + def call(env) + return @app.call(env) if @permissions.empty? + + request = Request.new(env) + + if authorized?(request) + mark_as_authorized(request) + @app.call(env) + else + @response_app.call(env) + end + end + + private + + def authorized?(request) + origin_host = request.get_header("HTTP_HOST").to_s.sub(/:\d+\z/, "") + forwarded_host = request.x_forwarded_host.to_s.split(/,\s?/).last.to_s.sub(/:\d+\z/, "") + + @permissions.allows?(origin_host) && + (forwarded_host.blank? || @permissions.allows?(forwarded_host)) + end + + def mark_as_authorized(request) + request.set_header("action_dispatch.authorized_host", request.host) + end + end +end diff --git a/actionpack/lib/action_dispatch/middleware/remote_ip.rb b/actionpack/lib/action_dispatch/middleware/remote_ip.rb index 35158f9062..a5667573f4 100644 --- a/actionpack/lib/action_dispatch/middleware/remote_ip.rb +++ b/actionpack/lib/action_dispatch/middleware/remote_ip.rb @@ -162,14 +162,12 @@ module ActionDispatch # Split the comma-separated list into an array of strings. ips = header.strip.split(/[,\s]+/) ips.select do |ip| - begin - # Only return IPs that are valid according to the IPAddr#new method. - range = IPAddr.new(ip).to_range - # We want to make sure nobody is sneaking a netmask in. - range.begin == range.end - rescue ArgumentError - nil - end + # Only return IPs that are valid according to the IPAddr#new method. + range = IPAddr.new(ip).to_range + # We want to make sure nobody is sneaking a netmask in. + range.begin == range.end + rescue ArgumentError + nil end end diff --git a/actionpack/lib/action_dispatch/middleware/templates/rescues/blocked_host.html.erb b/actionpack/lib/action_dispatch/middleware/templates/rescues/blocked_host.html.erb new file mode 100644 index 0000000000..2fa78dd385 --- /dev/null +++ b/actionpack/lib/action_dispatch/middleware/templates/rescues/blocked_host.html.erb @@ -0,0 +1,7 @@ +<header> + <h1>Blocked host: <%= @host %></h1> +</header> +<div id="container"> + <h2>To allow requests to <%= @host %>, add the following configuration:</h2> + <pre>Rails.application.config.hosts << "<%= @host %>"</pre> +</div> diff --git a/actionpack/lib/action_dispatch/middleware/templates/rescues/blocked_host.text.erb b/actionpack/lib/action_dispatch/middleware/templates/rescues/blocked_host.text.erb new file mode 100644 index 0000000000..4e2d1d0b08 --- /dev/null +++ b/actionpack/lib/action_dispatch/middleware/templates/rescues/blocked_host.text.erb @@ -0,0 +1,5 @@ +Blocked host: <%= @host %> + +To allow requests to <%= @host %>, add the following configuration: + + Rails.application.config.hosts << "<%= @host %>" diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb index 2ae75b0da8..2966c969f6 100644 --- a/actionpack/lib/action_dispatch/routing/route_set.rb +++ b/actionpack/lib/action_dispatch/routing/route_set.rb @@ -90,11 +90,11 @@ module ActionDispatch def clear! @path_helpers.each do |helper| - @path_helpers_module.send :remove_method, helper + @path_helpers_module.remove_method helper end @url_helpers.each do |helper| - @url_helpers_module.send :remove_method, helper + @url_helpers_module.remove_method helper end @routes.clear @@ -108,8 +108,8 @@ module ActionDispatch url_name = :"#{name}_url" if routes.key? key - @path_helpers_module.send :undef_method, path_name - @url_helpers_module.send :undef_method, url_name + @path_helpers_module.undef_method path_name + @url_helpers_module.undef_method url_name end routes[key] = route define_url_helper @path_helpers_module, route, path_name, route.defaults, name, PATH diff --git a/actionpack/lib/action_dispatch/testing/test_response.rb b/actionpack/lib/action_dispatch/testing/test_response.rb index 1e6b21f235..7c1202dc0e 100644 --- a/actionpack/lib/action_dispatch/testing/test_response.rb +++ b/actionpack/lib/action_dispatch/testing/test_response.rb @@ -14,11 +14,6 @@ module ActionDispatch new response.status, response.headers, response.body end - def initialize(*) # :nodoc: - super - @response_parser = RequestEncoder.parser(content_type) - end - # Was the response successful? def success? ActiveSupport::Deprecation.warn(<<-MSG.squish) @@ -47,7 +42,11 @@ module ActionDispatch end def parsed_body - @parsed_body ||= @response_parser.call(body) + @parsed_body ||= response_parser.call(body) + end + + def response_parser + @response_parser ||= RequestEncoder.parser(content_type) end end end |