Fix antiproxying (again).

Fuck it, just hardcode it. They rewrite certain parts of our markup so
we can't rely on anything in the html.

app/helpers/application_helper.rb

@@ -272,6 +272,8 @@ module ApplicationHelper
       current_item_data_attributes = data_attributes_for(current_item, model_name, model_attributes)
     end
 
+    config_data_attributes = data_attributes_for(Danbooru.config, "config", [:hostname, :domain])
+
     controller_param = params[:controller].parameterize.dasherize
     action_param = params[:action].parameterize.dasherize
 
@@ -282,8 +284,11 @@ module ApplicationHelper
         controller: controller_param,
         action: action_param,
         layout: controller.class.send(:_layout),
+        "current-user-ip-addr": request.remote_ip,
         **current_user_data_attributes,
-        **current_item_data_attributes.to_h
+        **current_item_data_attributes.to_h,
+        **config_data_attributes,
+        "config-environment": Rails.env,
       }
     }
   end

app/javascript/src/javascripts/common.js

@@ -20,8 +20,8 @@ $(function() {
     e.preventDefault();
   });
 
-  if (Danbooru.config["enable_antiproxying?"] && !location.hostname.endsWith(Danbooru.config.domain)) {
+  if (location.hostname.endsWith("danbooru.me")) {
-    location.hostname = Danbooru.config.hostname;
+    location.hostname = "danbooru.donmai.us";
   }
 });
 

app/views/layouts/default.html.erb

@@ -120,7 +120,6 @@
       window.Danbooru = {};
     }
 
-    window.Danbooru.config = <%= [:hostname, :domain, :enable_antiproxying?].map { |opt| [opt, Danbooru.config.send(opt)] }.to_h.to_json.html_safe %>;
     window.Danbooru.notice = Danbooru.Utility.notice;
     window.Danbooru.error = Danbooru.Utility.error;
   </script>

config/danbooru_default_config.rb

@@ -30,11 +30,6 @@ module Danbooru
       Socket.gethostname
     end
 
-    # The canonical base domain for the site, e.g. donmai.us.
-    def domain
-      hostname
-    end
-
     # Contact email address of the admin.
     def contact_email
       "webmaster@#{hostname}"
@@ -472,11 +467,6 @@ module Danbooru
     def redis_url
       "redis://localhost:6379"
     end
-
-    # Try to prevent copycat sites from proxying our site and inserting ads or phishing passwords.
-    def enable_antiproxying?
-      Rails.env.production?
-    end
   end
 
   class EnvironmentConfiguration