Rails image_tag不使用CDN资产

我最近为我的应用程序设置了一个CDN，几乎一切正常，像我的静态资产，我的JS和CSS。Rails image_tag不使用CDN资产

但一些对象的资产（图像）继续使用我的S3 URL来从，数据，例如：

<%= image_tag(@listing.cover.url(:large))%>

而成，在生产中：

<img src="https://musicjungle.s3.amazonaws.com/listing_covers/5045/large.jpg?1484594254" class="fotorama__img" style="width: 548px; height: 548px; left: 91px; top: 0px;">

而不是用我的CDN。为了记录在案，这里是一片我production.rb的，我设置了CDN：

#CDN settings 
config.action_controller.asset_host = "d1bfllp5zjnl7u.cloudfront.net"

正如我所描述的，我的所有其他资产都没有问题呈现，但那些仍然使用S3。也许这与我有一个附件助手有关？我创建了一个将应用程序上传到S3的图片，这里是代码：

module Shared 
    module AttachmentHelper 

    def self.included(base) 
     base.extend ClassMethods 
    end 

    module ClassMethods 
     def has_attachment(name, options = {}) 

     # generates a string containing the singular model name and the pluralized attachment name. 
     # Examples: "user_avatars" or "asset_uploads" or "message_previews" 
     attachment_owner = self.table_name.singularize 
     attachment_folder = "#{attachment_owner}_#{name.to_s.pluralize}" 

     # we want to create a path for the upload that looks like: 
     # message_previews/00/11/22/001122deadbeef/thumbnail.png 
     attachment_path  = "#{attachment_folder}/:id/:style.:extension" 

     if Rails.env.production? 
      options[:path]   ||= attachment_path 
      options[:storage]   ||= :s3 
      options[:s3_credentials] ||= { 
      :bucket => 'bucket-name', 
      :access_key_id => 'KEY_ID', 
      :secret_access_key => 'ACCESS_KEY' 
      } 
      options[:s3_permissions] ||= 'private' 
      options[:s3_protocol]  ||= 'https' 
      options[:s3_headers]  ||= { 
      'Cache-Control' => 'max-age=315576000', 
      'Expires' => 10.years.from_now.httpdate 
      } 
     else 
      # For local Dev/Test envs, use the default filesystem, but separate the environments 
      # into different folders, so you can delete test files without breaking dev files. 
      options[:path] ||= ":rails_root/public/system/attachments/#{Rails.env}/#{attachment_path}" 
      options[:url] ||= "/system/attachments/#{Rails.env}/#{attachment_path}" 
     end 

     # pass things off to paperclip. 
     has_attached_file name, options 
     end 
    end 
    end 
end

来源

2017-01-22 Eduardo Almeida

尝试设置s3_host_alias选项在您的回形针选项：

options[:s3_host_alias] = "d1bfllp5zjnl7u.cloudfront.net"

来源

2017-01-23 16:38:47 wjordan

Rails image_tag不使用CDN资产

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