在Rails 5.2中,我们有了新的CSP(内容安全策略)DSL。它在
initializers/content_security_policy.rb
中进行配置,如下所示:Rails.application.config.content_security_policy do |policy|
policy.object_src :none # disallow <object> tags (Good-bye Flash!)
policy.default_src :self, :https
policy.font_src :self, :https, :data, Rails.configuration.application.asset_host, Rails.configuration.application.aws_s3_media_cdn
policy.img_src :self, :https, :data, Rails.configuration.application.asset_host, Rails.configuration.application.aws_s3_media_cdn
policy.script_src :self, :https, Rails.configuration.application.asset_host
policy.style_src :self, :https, Rails.configuration.application.asset_host
if Rails.env.development? || Rails.env.test?
# Fix for webpack-dev-server and ActionCable
policy.connect_src :self, :https, "http://localhost:3035", "ws://localhost:3035", "ws://localhost:3000"
end
# Specify URI for violation reports
# policy.report_uri "/csp-violation-report-endpoint"
end
# If you are using UJS then enable automatic nonce generation
Rails.application.config.content_security_policy_nonce_generator = -> request { SecureRandom.base64(16)
这很好运作。但我无法让Turbolinks和RailsUJS一起工作。
在
app/views/layouts/application.html.haml
中,我们有以下代码(简化):!!!5
%html
%head
= csrf_meta_tags
= csp_meta_tag
= javascript_pack_tag 'application', 'data-turbolinks-track': :reload
= action_cable_meta_tag
%body
= yield
假设我们有一个像这样的UJS按钮:
<a class="btn btn-danger" data-disable-with="Processing..." data-params="device%5Bstatus%5D=inactive" data-remote="true" rel="nofollow" data-method="patch" href="/devices/1">Shutdown</a>
以下是一个看起来非常简单的控制器:
class DevicesController < ApplicationController
respond_to :html
#...
def update
@device.update(device_params)
respond_with @device, location: :devices
end
end
这段代码正常工作,我们可以从Turbolinks Rails引擎中得到适当的响应。
Turbolinks.clearCache()
Turbolinks.visit("http://localhost:3000/devices", {"action":"replace"})
但我们得到了错误消息:
因此,第一个问题是:这些许多nonce来自哪里?拒绝执行内联脚本,因为它违反了以下内容安全策略指令:"script-src 'self' https: 'nonce-QAz+FlHz5wo0IwU5sIMZ/w==' 'nonce-IsrK1b0jw1w7cqRhHeZ7ug==' 'nonce-Rpl8hMBgap79cfwdlXXwjA==' 'nonce-1Wq7MbBEYMDCkEWGexwQ9Q==' 'nonce-EUL22iiKHn0hkNuW3fpkbA==' 'nonce-F5Vg50g0JvAvkXHHu+p0qw==' 'nonce-slHxjCy9VVEvvoIcJ870lg==' 'nonce-lboTgbdLG4iCgUozIK4LPQ==' 'nonce-K9yAPOgjZDXRTvnJb3glTA==' 'nonce-ux2kfUZjU/nxJn30LaTFjQ==' 'nonce-8E8cTAX+jWNpvl5lw0Ydjw==' 'nonce-BvJ4wU3AqjZRWY930+W8kg==' 'nonce-PsS01n7AnjmiThKQJFzUBA==' 'nonce-RCoOSLXbx6Cj8aw+LuBSwA==' 'nonce-o5MfDl/crSPzjSyMzIvXNA==' 'nonce-s8NPaOETMpU2f48LR2SuqQ==' 'nonce-Omuo2P68l09PTBFxmk4DkA==' 'nonce-N3YQfaIuPSrURB8jhVz3Sw==' 'nonce-Ts4Bp4GUqawLcHI1mRLcxw==' 'nonce-fTZ6W2u9eh8K5yCJMPfJGg==' 'nonce-1ST0058rq41fDhw8CforxA==' 'nonce-tA+jUJ1x841ZseUUjvQn9w==' 'nonce-CVjBLiByDSqBNHdG6/izBA==' 'nonce-1z6mH6xtPajsxVmojM8SNA==' 'nonce-0zlDfL8I0go9aII/DGZUzg==' 'nonce-WOrw4qdxeKfZQ1R7xUfdbQ==' 'nonce-G8kmjJA5E35Asgy6mj80PQ=='"。要启用内联执行,需要 "unsafe-inline" 关键字、哈希 ("sha256-9KVlOPCQBe0v+kIJoBA6hi7N+aI2yVDUXS9gYk4PizU=") 或 nonce("nonce-...")。
另一项调查:在JavaScript控制台中调用Turbolinks.visit后,csp-nonce和csrf-token值会发生变化。我认为这就是问题所在。由于Rails UJS使用原始值将nonce添加到它创建的内联JavaScript标签中。但是在所有内容都被呈现之后,nonce已经改变了。因此,内联标记不再有效。如何避免这种情况?
注意:我们正在通过webpacker设置Turbolinks和RailsUJS,如下所示:
import Turbolinks from 'turbolinks'
import Rails from 'rails-ujs'
// Start application
Rails.start(); // Rails ujs
Turbolinks.start(); // Turbolinks, obviously...
提前致谢,
SPA