execption handle

Gemfile

@@ -8,6 +8,8 @@ unless RUBY_PLATFORM =~ /w32/
 end
 
 gem 'seems_rateable', path: 'lib/seems_rateable'
+gem 'exception_notification', '~> 4.1.0.rc1'
+gem 'sidekiq', '~> 3.2.2'
 gem "rails", "3.2.13"
 gem "jquery-rails", "~> 2.0.2"
 gem "i18n", "~> 0.6.0"

app/controllers/concerns/exception_handler.rb

@@ -0,0 +1,113 @@
+module ExceptionHandler
+
+  extend ActiveSupport::Concern
+
+  included do
+  end
+
+  module ClassMethods
+
+    private
+
+    def rescue_errors
+      rescue_from ::Exception,                            :with => :render_error
+      rescue_from ::RuntimeError,                         :with => :render_error
+      rescue_from ::ActiveRecord::RecordNotFound,         :with => :render_record_not_found
+      rescue_from ::ActionController::RoutingError,       :with => :render_404
+      rescue_from ::ActionController::UnknownController,  :with => :render_error
+      rescue_from ::AbstractController::ActionNotFound,      :with => :render_error
+    end
+  end
+
+  # should be a public method
+  # 
+  # add match '*path', to: 'application#routing_error', via: :all to routes.rb
+  # 
+  def routing_error(exception=nil)
+    # redirect_to root_path
+    raise ::ActionController::RoutingError.new(params[:path])
+  end
+
+  private
+
+  def exception_template_and_layout(page_code)
+    template = "%s/errors/%s" % [identity, page_code]
+    layout = "%s_%s" % [identity, send("#{identity}_signed_in?") ? :normal : :guest]
+    
+    [template, layout]
+  end
+
+  def render_404(exception=nil)
+    template, layout = exception_template_and_layout(404)
+    render template: template, layout: layout, status: 404, formats: [:html]
+  end
+  
+  def render_500(exception=nil)
+    template, layout = exception_template_and_layout(500)
+    render template: template, layout: layout, status: 500, formats: [:html]
+  end
+
+  def render_record_not_found(exception=nil)
+    # redirect_to root_path
+    render_404(exception)
+    debug_exception(exception)
+  end
+
+  def render_error(exception)
+    render_500
+    debug_exception(exception)
+  end
+
+  def debug_exception(exception)
+    ::Rails.logger.error exception.message
+    exception.backtrace.each { |line| ::Rails.logger.error line }
+
+    # exception_notification
+    ::ExceptionNotifier.notify_exception(exception, env: ::Rails.env, data: notify_exception_data)
+  rescue
+  end
+
+
+
+  # 
+  # from https://github.com/le0pard/mongodb_logger/blob/25b29c094ab0cffb2de0e71112832dbdca3b7a6b/lib/mongodb_logger.rb
+  # 
+  def notify_exception_data
+    f_session = (request.respond_to?(:session) ? request.session : session)
+    {
+      method:         request.method,
+      action:         action_name,
+      controller:     controller_name,
+      path:           request.path,
+      url:            request.url,
+      params:         (request.respond_to?(:filtered_parameters) ? request.filtered_parameters : params),
+      session:        mongo_fix_session_keys(f_session),
+      ip:             request.remote_ip,
+      user_agent:     request.user_agent,
+      headers:        http_request_headers
+    }
+  end
+
+  # 
+  # from https://github.com/le0pard/mongodb_logger/blob/25b29c094ab0cffb2de0e71112832dbdca3b7a6b/lib/mongodb_logger.rb
+  #
+  # session keys can be with dots. It is invalid keys for BSON
+  def mongo_fix_session_keys(session = {})
+    new_session = Hash.new
+    session.to_hash.each do |i, j|
+      new_session[i.gsub(/\./i, "|")] = j.inspect
+    end unless session.empty?
+    new_session
+  end
+
+  # from http://stackoverflow.com/questions/2667634/include-params-request-information-in-rails-logger
+  def http_request_headers
+    keys = request.headers.env
+    header_keys = keys.select{|header_name| header_name.match("^HTTP.*")}
+    headers = request.headers.select{|header_name, header_value| header_keys.key(header_name)}
+    headers
+  rescue
+    {}
+  end
+
+end

app/helpers/application_helper.rb

@@ -30,6 +30,14 @@ module ApplicationHelper
   include PraiseTreadHelper
   include CoursesHelper
 
+  ##exception handler 
+  include ::ExceptionHandler
+  rescue_errors unless ::Rails.env.development?
+  # Prevent CSRF attacks by raising an exception.
+  # For APIs, you may want to use :null_session instead.
+  # http://stackoverflow.com/questions/16258911/rails-4-authenticity-token
+  protect_from_forgery with: :null_session #:exception
+
   extend Forwardable
   def_delegators :wiki_helper, :wikitoolbar_for, :heads_for_wiki_formatter
   

config/settings.yml

@@ -249,3 +249,8 @@ contest_domain:
   default: contest.trustie.net
 course_domain:
   default: course.trustie.net
+exception_notification:
+  recipients: ['trustieforge@gmail.com']
+
+contact_notification:
+  recipients: ['trustieforge@gmail.com']