Replace raven with appsignal

Author: Martijn Russchen

README.md

@@ -15,7 +15,7 @@ dokku config:set proxy-production redirect_for_no_url='https://factlink.com' \
   hostname='fct.li' \
   host='http://fct.li' \
   jslib_uri='https://static.factlink.com/lib/dist/factlink_loader.min.js?o=proxy' \
-  raven_dsn='...'
+  APPSIGNAL_PUSH_API_KEY='...'
 ```
 
 ## Contributing

lib/appsignal_goliath_listener.rb

@@ -0,0 +1,18 @@
+require 'appsignal'
+
+Appsignal.config =
+  Appsignal::Config.new(ENV['PWD'], Goliath.env, name: "Factlink Proxy")
+Appsignal.start_logger(nil)
+Appsignal.start
+
+class AppsignalGoliathListener
+  include Goliath::Rack::AsyncMiddleware
+
+  def post_process(env, status, headers, body)
+    if Appsignal.active? && env['rack.exception']
+      Appsignal.send_exception(env['rack.exception'])
+    end
+
+    [status, headers, body]
+  end
+end

lib/raven_catcher.rb

@@ -8,10 +8,10 @@
 require_relative './lib/redirect_root_url'
 require_relative './lib/redirect_if_publisher'
 require_relative './lib/strip_publisher_script'
-require_relative './lib/raven_catcher'
+require_relative './lib/appsignal_goliath_listener'
 
 class Server < WebProxy
-  use RavenCatcher
+  use AppsignalGoliathListener
   use RedirectRootUrl
   use AddFactlinkToPage
   if Goliath.env == :production