ruby-on-rails – Rails缓存 – XML文件？

如果您只提供xml而且没有html,那么在查找缓存文件时,您也可以将apache conf编辑为默认为xml而不是html.

缓存到期对于代码和测试来说是一件相当无聊的事情,但由于您很少重新生成文件,因此您可能只会使整个缓存失效.

这是一个精心挑选的文件和摘录,来自我如何在一个很小的,很少更新的rails网站中处理缓存：

在要缓存的控制器中

class XmlThingController < ApplicationController
  caches_page :index,:show,:other_actions

在修改可能导致xmls更改的数据的控制器/操作中：

class Admin::SomeCrudController < AppplicationController
  cache_sweeper :stupid_master_sweeper,:only => [ :save,:destroy ]

在’config / environments / production.rb’中

config.action_controller.page_cache_directory = 
  File.join(RAILS_ROOT,'public','cache')

在您的vhost apache conf中的某个地方：

# 1.4. Handle caching

# 1.4.1. prevent direct cache access
RewriteRule  ^/cache - [F,L]

# 1.4.2. for index
RewriteCond  %{DOCUMENT_ROOT}/cache/index.html -f
RewriteRule  ^/?$/cache/index.html [L]

# 1.4.3. for explicitly specified extensions
RewriteCond  %{DOCUMENT_ROOT}/cache%{REQUEST_URI} -f
RewriteRule  ^(.*)$/cache$1 [L]

# 1.4.4. with html extension implied
RewriteCond  %{DOCUMENT_ROOT}/cache%{REQUEST_URI}.html -f
RewriteRule  ^(.*)$/cache$1.html [L]


# 1.5. Finally,proxy everything else to mongrel
RewriteCond  %{DOCUMENT_ROOT}/%{REQUEST_FILENAME} !-f
RewriteRule  ^/(.*)$balancer://your-website-proxy%{REQUEST_URI} [P,QSA,L]

愚蠢的清扫工,每当它被触发时清除整个缓存：

class StupidMasterSweeper < ActiveRecord::Observer
  observe Foo,Bar # All models that affect caching here

  def after_save(record); end
  def after_destroy(record); end

  def filter(controller)
    # sweep everything.
    `cd #{RAILS_ROOT} && RAILS_ENV=#{ENV['RAILS_ENV']} rake cache:clear`
  end
end

LIB /任务/ cache.rake

namespace :cache do 

  desc "Remove all cached files" 
  task :clear do
    puts `rm -rf #{RAILS_ROOT}/public/cache/*`
  end 

end

如果您希望将默认隐含扩展名默认为xml,请更改1.4.2索引规则的扩展名,以及以下内容：

# 1.4.4. with html extension implied
RewriteCond  %{DOCUMENT_ROOT}/cache%{REQUEST_URI}.html -f
RewriteRule  ^(.*)$/cache$1.html [L]

至：

# 1.4.4. with xml extension implied
RewriteCond  %{DOCUMENT_ROOT}/cache%{REQUEST_URI}.xml -f
RewriteRule  ^(.*)$/cache$1.xml [L]