diff options
Diffstat (limited to 'railties/lib/dispatcher.rb')
| -rw-r--r-- | railties/lib/dispatcher.rb | 161 |
1 files changed, 2 insertions, 159 deletions
diff --git a/railties/lib/dispatcher.rb b/railties/lib/dispatcher.rb index 398acb7e97..9db424f14b 100644 --- a/railties/lib/dispatcher.rb +++ b/railties/lib/dispatcher.rb @@ -20,162 +20,5 @@ # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. #++ - -# This class provides an interface for dispatching a CGI (or CGI-like) request -# to the appropriate controller and action. It also takes care of resetting -# the environment (when Dependencies.load? is true) after each request. -class Dispatcher - class << self - # Dispatch the given CGI request, using the given session options, and - # emitting the output via the given output. If you dispatch with your - # own CGI object be sure to handle the exceptions it raises on multipart - # requests (EOFError and ArgumentError). - def dispatch(cgi = nil, session_options = ActionController::CgiRequest::DEFAULT_SESSION_OPTIONS, output = $stdout) - controller = nil - if cgi ||= new_cgi(output) - request, response = ActionController::CgiRequest.new(cgi, session_options), ActionController::CgiResponse.new(cgi) - prepare_application - controller = ActionController::Routing::Routes.recognize(request) - controller.process(request, response).out(output) - end - rescue Exception => exception # errors from CGI dispatch - failsafe_response(cgi, output, '500 Internal Server Error', exception) do - controller ||= (ApplicationController rescue ActionController::Base) - controller.process_with_exception(request, response, exception).out(output) - end - ensure - # Do not give a failsafe response here - flush_logger - reset_after_dispatch - end - - # Reset the application by clearing out loaded controllers, views, actions, - # mailers, and so forth. This allows them to be loaded again without having - # to restart the server (WEBrick, FastCGI, etc.). - def reset_application! - ActiveRecord::Base.reset_subclasses if defined?(ActiveRecord) - - Dependencies.clear - - ActiveRecord::Base.clear_reloadable_connections! if defined?(ActiveRecord) - end - - # Add a preparation callback. Preparation callbacks are run before every - # request in development mode, and before the first request in production - # mode. - # - # An optional identifier may be supplied for the callback. If provided, - # to_prepare may be called again with the same identifier to replace the - # existing callback. Passing an identifier is a suggested practice if the - # code adding a preparation block may be reloaded. - def to_prepare(identifier = nil, &block) - unless identifier.nil? - callback = preparation_callbacks.detect { |ident, _| ident == identifier } - - if callback # Already registered: update the existing callback - callback[-1] = block - return - end - end - - preparation_callbacks << [identifier, block] - - return - end - - private - attr_accessor_with_default :preparation_callbacks, [] - attr_accessor_with_default :preparation_callbacks_run, false - - # CGI.new plus exception handling. CGI#read_multipart raises EOFError - # if body.empty? or body.size != Content-Length and raises ArgumentError - # if Content-Length is non-integer. - def new_cgi(output) - failsafe_response(nil, output, '400 Bad Request') { CGI.new } - end - - def prepare_application - if Dependencies.load? - ActionController::Routing::Routes.reload - self.preparation_callbacks_run = false - end - - require_dependency 'application' unless Object.const_defined?(:ApplicationController) - ActiveRecord::Base.verify_active_connections! if defined?(ActiveRecord) - run_preparation_callbacks - end - - def reset_after_dispatch - reset_application! if Dependencies.load? - end - - def run_preparation_callbacks - return if preparation_callbacks_run - preparation_callbacks.each { |_, callback| callback.call } - self.preparation_callbacks_run = true - end - - # If the block raises, send status code as a last-ditch response. - def failsafe_response(cgi, fallback_output, status, exception = nil) - yield - rescue Exception - begin - log_failsafe_exception(cgi, status, exception) - - body = failsafe_response_body(status) - if cgi - head = { 'status' => status, 'type' => 'text/html' } - - # FIXME: using CGI differently than CGIResponse does breaks - # the Mongrel CGI wrapper. - if defined?(Mongrel) && cgi.is_a?(Mongrel::CGIWrapper) - # FIXME: set a dummy cookie so the Mongrel CGI wrapper will - # also consider @output_cookies (used for session cookies.) - head['cookie'] = [] - cgi.header(head) - fallback_output << body - else - cgi.out(head) { body } - end - else - fallback_output.write "Status: #{status}\r\nContent-Type: text/html\r\n\r\n#{body}" - end - nil - rescue Exception # Logger or IO errors - end - end - - def failsafe_response_body(status) - error_path = "#{RAILS_ROOT}/public/#{status[0..3]}.html" - - if File.exists?(error_path) - File.read(error_path) - else - "<html><body><h1>#{status}</h1></body></html>" - end - end - - def log_failsafe_exception(cgi, status, exception) - fell_back = cgi ? 'has cgi' : 'no cgi, fallback ouput' - message = "DISPATCHER FAILSAFE RESPONSE (#{fell_back}) #{Time.now}\n Status: #{status}\n" - message << " #{exception}\n #{exception.backtrace.join("\n ")}" if exception - failsafe_logger.fatal message - end - - def failsafe_logger - if defined?(RAILS_DEFAULT_LOGGER) && !RAILS_DEFAULT_LOGGER.nil? - RAILS_DEFAULT_LOGGER - else - ActiveSupport::BufferedLogger.new($stderr) - end - end - - def flush_logger - RAILS_DEFAULT_LOGGER.flush if defined?(RAILS_DEFAULT_LOGGER) && RAILS_DEFAULT_LOGGER.respond_to?(:flush) - end - end -end - -Dispatcher.to_prepare :activerecord_instantiate_observers do - ActiveRecord::Base.instantiate_observers -end if defined?(ActiveRecord) +require 'action_controller/dispatcher' +Dispatcher = ActionController::Dispatcher |