Rails image_tag不使用CDN資產

我最近爲我的應用程序設置了一個CDN，幾乎一切正常，像我的靜態資產，我的JS和CSS。Rails image_tag不使用CDN資產

但一些對象的資產（圖像）繼續使用我的S3 URL來從，數據，例如：

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

而成，在生產中：

<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。爲了記錄在案，這裏是一片我production.rb的，我設置了CDN：

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

正如我所描述的，我的所有其他資產都沒有問題呈現，但那些仍然使用S3。也許這與我有一個附件助手有關？我創建了一個將應用程序上傳到S3的圖片，這裏是代碼：

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

來源

2017-01-22 Eduardo Almeida

嘗試設置s3_host_alias選項在您的回形針選項：

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

來源

2017-01-23 16:38:47 wjordan

Rails image_tag不使用CDN資產

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