Question

我的生产环境 -

# Code is not reloaded between requests
  config.cache_classes = true
  config.assets.enabled = true

  # Full error reports are disabled and caching is turned on
  config.consider_all_requests_local       = false
  config.action_controller.perform_caching = true

  # Disable Rails's static asset server (Apache or nginx will already do this)
  config.serve_static_assets = true
  config.static_cache_control = "public, max-age=31536000"

  # Compress JavaScripts and CSS
  config.assets.compress = true
  config.assets.js_compressor  = :uglifier
  #config.assets.css_compressor = :yui

  # Don't fallback to assets pipeline if a precompiled asset is missed
  config.assets.compile = true

  # Generate digests for assets URLs
  config.assets.digest = true

  # See everything in the log (default is :info)
  config.log_level = :warn
  config.log_tags = [:remote_ip, lambda { |req| Time.now }]

  # Enable serving of images, stylesheets, and JavaScripts from an asset server
  ActionController::Base.asset_host = Proc.new { |source|
    unless source.starts_with?('/stylesheets' || '/javascripts')
      "//dddd.cloudfront.net/"
    end
   }

然而，当我使用image_tag时，它仍然会返回我的'/ assets ..'相对url而不是绝对url到资产主机。

irb(main):034:0> helper.image_tag('noimage.gif')
=> "<img alt=\"Noimage\" src=\"/assets/noimage.gif\" />"
irb(main):035:0> helper.image_path('noimage.gif')

我似乎无法想象可能遗漏的东西。我甚至尝试过简单的config.asset_host设置，但仍然无法识别设置。

Answer 1

您是否尝试过设置指定的配置？

config.action_controller.asset_host = 'https://abcd.cloudfront.net'

不确定它是否适用于协议相对网址。我只是在我的应用中使用https。

也许值得注意的是，动作邮件的设置类似：

config.action_mailer.asset_host = 'https://abcd.cloudfront.net'

Answer 2

Rails配置中有些奇怪的东西。根据文档asset_host应该仅包含host部分（'yoursite.com'）。我和一个帮手解决了：

module EmailsHelper

  def email_image_tag(src) 
    protocol = ActionMailer::Base.default_url_options[:protocol] || 'http'
    image_tag asset_path(src, protocol: protocol)
  end

end

在邮件中配置：

class EmailNotificationsMailer < ActionMailer::Base

  add_template_helper(EmailsHelper)
  ...

end

除了将URL传递给它之外，没有办法强制image_tag使用URL。

Rails 3.2 asset_host设置被忽略

2 个答案: