Add limit parameter to rss (#13743)

app/controllers/accounts_controller.rb

@@ -2,6 +2,7 @@
 
 class AccountsController < ApplicationController
   PAGE_SIZE     = 20
+  PAGE_SIZE_MAX = 200
 
   include AccountControllerConcern
   include SignatureAuthentication
@@ -40,7 +41,8 @@ class AccountsController < ApplicationController
       format.rss do
         expires_in 1.minute, public: true
 
-        @statuses = filtered_statuses.without_reblogs.limit(PAGE_SIZE)
+        limit     = params[:limit].present? ? [params[:limit].to_i, PAGE_SIZE_MAX].min : PAGE_SIZE
+        @statuses = filtered_statuses.without_reblogs.limit(limit)
         @statuses = cache_collection(@statuses, Status)
         render xml: RSS::AccountSerializer.render(@account, @statuses, params[:tag])
       end

app/controllers/tags_controller.rb

@@ -4,6 +4,7 @@ class TagsController < ApplicationController
   include SignatureVerification
 
   PAGE_SIZE     = 20
+  PAGE_SIZE_MAX = 200
 
   layout 'public'
 
@@ -25,6 +26,7 @@ class TagsController < ApplicationController
       format.rss do
         expires_in 0, public: true
 
+        limit     = params[:limit].present? ? [params[:limit].to_i, PAGE_SIZE_MAX].min : PAGE_SIZE
         @statuses = HashtagQueryService.new.call(@tag, filter_params, nil, @local).limit(PAGE_SIZE)
         @statuses = cache_collection(@statuses, Status)