rails - “警告:无法验证 CSRF 令牌的真实性"；用于 json 设计请求 [英] rails - "WARNING: Can't verify CSRF token authenticity" for json devise requests

问题描述

如何检索 CSRF 令牌以通​​过 JSON 请求传递?

How can I retrieve the CSRF token to pass with a JSON request?

我知道出于安全原因Rails 正在检查所有请求类型(包括 JSON/XML)上的 CSRF 令牌.

我可以放入我的控制器 skip_before_filter :verify_authenticity_token，但我会失去 CRSF 保护(不建议:-)).

I could put in my controller skip_before_filter :verify_authenticity_token, but I would lose the CRSF protection (not advisable :-) ).

这个类似的(仍然不被接受)answer建议

This similar (still not accepted) answer suggests to

使用 <%= form_authenticity_token %>

问题是如何?我是否需要首先调用我的任何页面以检索令牌，然后使用 Devise 进行真正的身份验证?或者它是一种一次性信息，我可以从我的服务器获取然后一直使用(直到我在服务器上手动更改它)?

The question is how? Do I need to do a first call to any of my pages to retrieve the token and then do my real authentication with Devise? Or it is an information one-off that I can get from my server and then use consistently (until I manually change it on the server itself)?

推荐答案

编辑:

在 Rails 4 中，我现在使用@genkilabs 在下面评论中的建议:

In Rails 4 I now use what @genkilabs suggests in the comment below:

protect_from_forgery with: :null_session, if: Proc.new { |c|c.request.format == 'application/json' }

这不是完全关闭内置安全性，而是在没有 CSRF 令牌的情况下击中服务器时终止可能存在的任何会话.

Which, instead of completely turning off the built in security, kills off any session that might exist when something hits the server without the CSRF token.

skip_before_filter :verify_authenticity_token, :if =>proc.new { |c|c.request.format == 'application/json' }

这将关闭对已正确标记为此类的 json 帖子/放置的 CSRF 检查.

This would turn off the CSRF check for json posts/puts that have properly been marked as such.

例如，在 iOS 中，将以下内容设置为您的 NSURLRequest，其中参数"是您的参数:

For example, in iOS setting the following to your NSURLRequest where "parameters" are your parameters:

[request setHTTPMethod:@"POST"];

[request setValue:@"application/json" 
       forHTTPHeaderField:@"content-type"];

[request setValue:@"application/json" 
       forHTTPHeaderField:@"accept"];

[request setHTTPBody:[NSData dataWithBytes:[parameters UTF8String] 
                                            length:[parameters length]]];

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