设计用户sign_in为CSRF令牌真实性令牌提供身份验证错误

Question

我正在做简单的身份验证（没有ajax或api)，并得到一个CSRF真实性令牌的错误。检查下面的POST请求

started POST "/users/sign_in" for 127.0.0.1 at 2013-11-08 19:48:49 +0530
Processing by Devise::SessionsController#create as HTML

 Parameters: {"utf8"=>"✓",    
 "authenticity_token"=>"SJnGhXXUXjncnPhCdg3muV2GYCA8CX2LVFV78pqddD4=", "user"=> 
{"email"=>"[e-mail]", "password"=>"[FILTERED]", "remember_me"=>"0"},
"commit"=>"Sign in"}

Can't verify CSRF token authenticity
 User Load (0.4ms)  SELECT "users".* FROM "users" WHERE "users"."email" =  
'[e-mail]' LIMIT 1
(0.1ms)  begin transaction
SQL (0.4ms)  UPDATE "users" SET "last_sign_in_at" = ?, "current_sign_in_at" = ?,
"sign_in_count" = ?, "updated_at" = ? WHERE "users"."id" = 2  [["last_sign_in_at", Fri,
08 Nov 2013 14:13:56 UTC +00:00], ["current_sign_in_at", Fri, 08 Nov 2013 14:18:49 UTC
+00:00], ["sign_in_count", 3], ["updated_at", Fri, 08 Nov 2013 14:18:49 UTC +00:00]]
(143.6ms)  commit transaction
Redirected to http://localhost:3000/
Completed 302 Found in 239ms (ActiveRecord: 144.5ms | Search: 0.0ms)

根url指向home#new，如下所示

class HomeController < ApplicationController
   before_action :authenticate_user!
   def index
   end
end

Sign_in页面生成的html视图如下所示：

<meta content="authenticity_token" name="csrf-param" />
<meta content="aV+d7Z55XBJF2VtyL8V3zupR3OwhaQ6UHNtlQLBQf5Y=" name="csrf-token" />

<form accept-charset="UTF-8" action="/users/sign_in" class="new_user" id="new_user" 
method="post">
<div style="margin:0;padding:0;display:inline">
<input name="utf8" type="hidden" value="&#x2713;" />
<input name="authenticity_token" type="hidden
value="aV+d7Z55XBJF2VtyL8V3zupR3OwhaQ6UHNtlQLBQf5Y=" />
</div>
<div><label for="user_email">Email</label><br />
<input autofocus="autofocus" id="user_email" name="user[email]" type="email" value="" />
</div>

<div><label for="user_password">Password</label><br />
<input id="user_password" name="user[password]" type="password" /></div>

<div><input name="user[remember_me]" type="hidden" value="0" />
<input id="user_remember_me" name="user[remember_me]" type="checkbox" value="1" /> 
<label for="user_remember_me">Remember me</label></div>

<div><input name="commit" type="submit" value="Sign in" /></div>
</form>

Answer 1

当CSRF令牌不正确时，Rails将不会读取或更新会话。它仍然会执行控制器指定的任何其他操作，这解释了为什么您看到了数据库更新，但最终没有登录。

我注意到日志和页面中的authenticity_token不匹配。我意识到这可能是因为您捕获了一个不同的请求，但您应该检查页面上的请求与日志中的请求是否匹配。我还假设您在视图中使用了正确的标记，该标记每次都会生成不同的authenticity_token，而不仅仅是硬编码HTML输入。

您是否发现与Devise无关的表单也存在同样的问题？如果没有，作为一种解决办法，您可以通过控制器中的以下代码免除您的操作的CSRF检查：

protect_from_forgery except: :sign_in