Heroku + CDN Cloudfront +字体 - Firefox错误

问题描述

最近，我们在CDN Cloudfront上移动了我们的资产。我们注意到，表面在Firefox上断开了。经过几分钟的搜索，这是一个CORS的故事。我们允许使用Cloudfront字段。

application_controller ：

  after_filter：set_access_control_headers 
 
 def set_access_control_headers 
 headers ['Access-Control-Allow-Origin'] = CDN_CLOUDFRONT 
 end 
  

production.rb ：

  CDN_CLOUDFRONT =http://xxx.cloudfront.net
  

这个工作非常好，直到昨天。

解决方案

没有找到解决方案。

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我没有使用Heroku设置，而是AFAIK（如），标头 Access-Control-Allow-Origin 应反映域的值消费来自CDN的静态资产。

例如：
对于托管在并使用中的资源

headers ['Access-Control-Allow-Origin'] ='http://mydomain.net'

将允许mydomain.net通过访问资产。换句话说，用您网站的域名替换 CDN_CLOUDFRONT 应该可以解决这个问题。

希望这有助于。 p>

PS：我不知道你的设置是如何工作的，直到昨天。 ：）

PPS：在您的CDN中添加替代域名（CNAME）将有助于您在需要快速丢弃现有通过公开的分发，并开始使用新分发。如果您正在使用替代域名，例如。

Recently we moved our assets on a CDN Cloudfront. We have noticed that the surfaces were broken on Firefox. After a few minutes of searching, it was a story of CORS. We allowed the field Cloudfront.

application_controller:

after_filter :set_access_control_headers

def set_access_control_headers
  headers['Access-Control-Allow-Origin'] = CDN_CLOUDFRONT
end

production.rb:

CDN_CLOUDFRONT = "http://xxx.cloudfront.net"

This worked very well until yesterday. After several searches and reflections, I have not found a solution.

Any idea?

解决方案

I haven't worked with a Heroku setup, but AFAIK (and as illustrated at developer.mozilla.org), the header Access-Control-Allow-Origin should reflect a value of the domain which consumes static assets from the CDN.

E.g.:For a website hosted at http://mydomain.net and consuming assets from http://wefe342r34r23.cloudfront.net

headers['Access-Control-Allow-Origin'] = 'http://mydomain.net'

Will allow mydomain.net to access assets via http://wefe342r34r23.cloudfront.net. In other words, replacing CDN_CLOUDFRONT with your website's domain name should solve the problem.

Hope this helps.

P.S.: I'm not sure how your setup worked until yesterday. :)

P.P.S: Adding Alternate Domain Names (CNAMEs) to your CDN will help you in a scenario wherein you want to quickly discard an existing distribution exposed over http://xxx.cloudfront.net and start using a fresh distribution http://yyy.cloudfront.net. You won't need to change anything in your application codebase if you are using an Alternate Domain Name such as http://cdn.mydomain.net in that case.

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