Question

目前，我收到来自欧盟中央银行gem的错误消息；

2018-09-06T18:26:20.629896+00:00 app[web.1]:   Error ID: 79f8e4f3
2018-09-06T18:26:20.629903+00:00 app[web.1]:   Error details saved to: /tmp/passenger-error.ZqeFNI
2018-09-06T18:26:20.629905+00:00 app[web.1]:   Message from application: redirection forbidden: http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml -> https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml (RuntimeError)
2018-09-06T18:26:20.629907+00:00 app[web.1]:   /app/vendor/ruby-2.2.4/lib/ruby/2.2.0/open-uri.rb:224:in `open_loop'
2018-09-06T18:26:20.629908+00:00 app[web.1]:   /app/vendor/ruby-2.2.4/lib/ruby/2.2.0/open-uri.rb:150:in `open_uri'
2018-09-06T18:26:20.629912+00:00 app[web.1]:   /app/vendor/ruby-2.2.4/lib/ruby/2.2.0/open-uri.rb:716:in `open'
2018-09-06T18:26:20.629916+00:00 app[web.1]:   /app/vendor/ruby-2.2.4/lib/ruby/2.2.0/open-uri.rb:34:in `open'
2018-09-06T18:26:20.629919+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/eu_central_bank-0.5.0/lib/eu_central_bank.rb:87:in `doc'
2018-09-06T18:26:20.629941+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/eu_central_bank-0.5.0/lib/eu_central_bank.rb:20:in `update_rates'
2018-09-06T18:26:20.629976+00:00 app[web.1]:   /app/config/initializers/money.rb:5:in `<top (required)>'
2018-09-06T18:26:20.630007+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `load'
2018-09-06T18:26:20.630038+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `block in load'
2018-09-06T18:26:20.630069+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:240:in `load_dependency'
2018-09-06T18:26:20.630099+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.0/lib/active_support/dependencies.rb:268:in `load'
2018-09-06T18:26:20.630128+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:652:in `block in load_config_initializer'
2018-09-06T18:26:20.630158+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/activesupport-4.2.0/lib/active_support/notifications.rb:166:in `instrument'
2018-09-06T18:26:20.630205+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:651:in `load_config_initializer'
2018-09-06T18:26:20.630344+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:616:in `block (2 levels) in <class:Engine>'
2018-09-06T18:26:20.630376+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:615:in `each'
2018-09-06T18:26:20.630409+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.0/lib/rails/engine.rb:615:in `block in <class:Engine>'
2018-09-06T18:26:20.630438+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `instance_exec'
2018-09-06T18:26:20.630467+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:30:in `run'
2018-09-06T18:26:20.630497+00:00 app[web.1]:   /app/vendor/bundle/ruby/2.2.0/gems/railties-4.2.0/lib/rails/initializable.rb:55:in `block in run_initializers'

我认为gem或xml文件夹有问题。但是突然发生了。该应用程序现已关闭。无法将链接从http更改为https

Answer 1

显然，您正面临与此相同的问题：

Ruby open-uri redirect forbidden

这是因为欧盟中央银行强迫重定向到https，但是openuri库不允许这样做，这就是为什么出现此错误的原因：redirection forbidden。

有一个名为open_uri_redirections的gem将修补openuri以允许重定向。

https://github.com/open-uri-redirections/open_uri_redirections

您需要做的只是：

将此宝石添加到您的Gemfile中。
$ bundle install安装新添加的gem。
require 'open_uri_redirections'

这应该可以暂时解决您的问题。

（建议）另一种解决方法是使用猴子补丁eu_central_bank gem覆盖

ECB_RATES_URL在eu_central_bank/lib/eu_central_bank.rb:20

ECB_90_DAY_URL在eu_central_bank/lib/eu_central_bank.rb:21

使用https而不是http常量。

如下（将此代码放入config/initializers/patch_eu_central_bank.rb）：

require 'eu_central_bank'
class EuCentralBank
  ECB_RATES_URL = 'https://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml'.freeze
  ECB_90_DAY_URL = 'https://www.ecb.europa.eu/stats/eurofxref/eurofxref-hist-90d.xml'.freeze
end

您可能会看到一些警告，例如：

warning: already initialized constant EuCentralBank::ECB_RATES_URL。

您可以忍受它直到PR合并到EuCentralBank宝石上。

欧盟中央银行禁止宝石重定向

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