Devise + Rails 3.0.4 在 AJAX 请求后结束会话 [英] Devise + Rails 3.0.4 ends session after AJAX request

问题描述

我有一个由 Ajax.InPlaceEditor 或 InPlaceCollectionEditor 生成的 AJAX 请求触发的操作，如下所示:

I have an action triggered by an AJAX request generated by Ajax.InPlaceEditor or InPlaceCollectionEditor like this:

new Ajax.InPlaceCollectionEditor('agent_email', 'inspections/<%= @inspection.id %>/update_field', 
{
collection: [<% @agents.each do |agent| %>
        '<%= agent.email %>',           
        <% end %>],
    okText: 'Update',
    cancelText: 'Never mind',
    savingText: 'Updating...'

});

在另一端，动作包含:

def update_field
  --some code here--
  if success
    puts "stored change"
    render :text => result
  else
    puts "did note change store"
    render :text => inspection.errors.to_json, :status => 500
  end
end

一旦到达任何渲染方法，会话就会过期，下次用户发送请求时，Devise 会将它们发送到登录页面.

Once any of the render methods are reached, the session expires, and next time the user send a request, Devise sends them to the logon on page.

即使我从身份验证中免除 update_field (before_filter :authenticate_user!, :except => :update_field)，会话仍在重置.

Even though I am exempting update_field from authentication (before_filter :authenticate_user!, :except => :update_field), the session is still getting reset.

我在设计中查看了一个非常相似的问题的答案session 在 .js 调用 [AJAX] 时立即过期，但它没有解决我的特定问题.

I have looked at the answer at a very similar question at Devise session immediately expiring on .js call [AJAX], but it is not solving my particular problem.

有什么想法吗?

推荐答案

我通过从 http://weblog.rubyonrails.org/2011/2/8/csrf-protection-bypass-in-ruby-on-rails(原型片段.js):

I got this to work by getting the code from http://weblog.rubyonrails.org/2011/2/8/csrf-protection-bypass-in-ruby-on-rails (prototype-snippet.js):

/*
 * Registers a callback which copies the csrf token into the
 * X-CSRF-Token header with each ajax request.  Necessary to 
 * work with rails applications which have fixed
 * CVE-2011-0447
*/

Ajax.Responders.register({
onCreate: function(request) {
  var csrf_meta_tag = $$('meta[name=csrf-token]')[0];

  if (csrf_meta_tag) {
    var header = 'X-CSRF-Token',
        token = csrf_meta_tag.readAttribute('content');

    if (!request.options.requestHeaders) {
      request.options.requestHeaders = {};
    }
    request.options.requestHeaders[header] = token;
  }
}
});

... 在我的 application.html.erb 的 Javascript 块中:

... within a Javascript block in my application.html.erb:

<script type="text/javascript">
  (... the code from above)
</script>

另外不要忘记添加:

<%= csrf_meta_tag %>

在顶部的同一个文件中(如果还没有).

in the same file towards the top (if not already there).

文档Ruby on Rails 中的 CSRF 保护绕过"解释了为什么会这样.

The document "CSRF Protection Bypass in Ruby on Rails" explains why this works.

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