Rails 3 - 生产模式中的开发错误

Question

Im using Rails, Passenger (both are 3.0.5) and Nginx on my production server. As I heard, Rails should show public/404.html or public/500.html instead of development errors like ActiveRecord::RecordNotFound or Unknown action but that doesn't happen. I've tried to delete config.ru file and set rack_env or rails_env in nginx.conf but nothing helped.

Here is my nginx.conf:

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    passenger_root /home/makk/.rvm/gems/ruby-1.9.2-p0/gems/passenger-3.0.5;
    passenger_ruby /home/makk/.rvm/bin/passenger_ruby;
    #passenger_ruby /home/makk/.rvm/wrappers/ruby-1.9.2-p0/ruby;

    include       mime.types;
    default_type  application/octet-stream;

    sendfile        on;
    keepalive_timeout  65;

    server {
        listen       80;
        server_name  localhost;

        location / {
            root   /home/makk/projects/1server/deploy/current/public;
            index  index.html index.htm;
            passenger_enabled on;
            rack_env production;

            recursive_error_pages on;

            if (-f /home/makk/projects/1server/maintenance.html) {
              return 503;
            }

            error_page 404 /404.html;
            error_page 500 502 504 /500.html;
            error_page 503 @503;
        }

        location @503 {
            error_page 405 = /maintenance.html;

            # Serve static assets if found.
              if (-f $request_filename) {
              break;
            }
            rewrite ^(.*)$ /maintenance.html break;
        }

        location ~ ^(\/phpmyadmin\/)(.*)$ {
        fastcgi_pass    127.0.0.1:9000;
        fastcgi_index   index.php;
        fastcgi_split_path_info         ^(\/phpmyadmin\/)(.*)$;
        fastcgi_param   SCRIPT_FILENAME /usr/share/phpmyadmin/$fastcgi_path_info;
        include         fastcgi_params;
        }
    }
}

It seems that this question duplicates this one but there are no working suggestions.

UPD : I have both development and production apps on same PC. In production Rails ignores config.consider_all_requests_local = false (in /config/environments/production.rb) due to local_request? method. So one of possible solutions is listed below (taken from here ):

# config/initializers/local_request_override.rb
module CustomRescue
  def local_request?
    return false if Rails.env.production? || Rails.env.staging?
    super
  end
end

ActionController::Base.class_eval do
  include CustomRescue
end

Or for Rails 3:

class ActionDispatch::Request
 def local?
   false
 end
end

Answer 1

To get this working in Rails 3 you'll have to do the following:

First, create your 404 and 500 error pages. I put mine in app/views/errors/404.html.erb and app/views/errors/500.html.erb .

Second, add the following to application_controller.rb:

unless Rails.application.config.consider_all_requests_local
  rescue_from Exception, :with => :render_error
  rescue_from ActiveRecord::RecordNotFound, :with => :render_not_found
  rescue_from AbstractController::ActionNotFound, :with => :render_not_found
  rescue_from ActionController::RoutingError, :with => :render_not_found
  rescue_from ActionController::UnknownController, :with => :render_not_found
  rescue_from ActionController::UnknownAction, :with => :render_not_found
end

def render_error exception
  Rails.logger.error(exception)
  render :template => "/errors/500.haml", :status => 500
end

def render_not_found exception
  Rails.logger.error(exception)
  render :template => "/errors/404.haml", :status => 404
end

Finally, make your production.rb not consider all requests local:

config.consider_all_requests_local = false

PS: Keep in mind that when a complete routing error happens - ie when there is absolutely no route match, not just an ActiveRecord NotFound error, the public/404.html will get displayed, so it's good to have that in place. I usually just re-direct it to my errors_controller, which ensures that any 404 errors not caught by the latter mentioned exceptions are still properly redirected to ErrorsController.

<script type="text/javascript">
<!--
window.location = "<%= request.host_with_port %>/errors/404"
//-->
</script>

Answer 2

To get errors only in certain controllers

class AdminController < ApplicationController
  rescue_from Exception, :with => :render_simple_error if Rails.env.production?
  def render_simple_error(e)
    render :text => "#{e.message} -- #{e.class}<br/>#{e.backtrace.join("<br/>")}"
  end
end

Answer 3

Move your root declaration up to the "server" block so the server can use the Rails app defined error handling pages when it receives a 5XX, 4XX error.

Or add error_page directives to the location block where passenger is being used so the error handlers can resolve the public/5xx.html in the Rails app public directory when needed.

If your app is not serving up the page and nginx has no visibility to the static page then it can't serve the page you want.

Answer 4

在apache乘客上，我使用了apache配置选项PassengerFriendlyErrorPages 。