如何在 Rails 测试中轻松解析带有参数的 URL? [英] How do I easily parse a URL with parameters in a Rails test?

问题描述

我有一些代码将 return_to URL 嵌入到我想测试的重定向(如 OpenID)中:

I have a some code that embeds a return_to URL into a redirect (like OpenID) that I want to test:

def test_uses_referrer_for_return_to
  expected_return_to = 'http://test.com/foo'
  @request.env['HTTP_REFERER'] = expected_return_to
  get :fazbot
  # @response.redirected_to looks like http://service.com?...&return_to=[URI-encoded version of URL above]&...
  encoded_return_to = (something_here)[:return_to]
  assert_equal expected_return_to, URI.unencode(encoded_return_to)
end

这是一个 Rails ActionController::TestCase，所以我可以访问各种辅助方法；我就是找不到合适的.

It's a Rails ActionController::TestCase, so I have access to all sorts of helper methods; I just can't find the right one.

当然我可以使用 URI.parse 来获取 URL 的 params 部分，然后在 /&|?/ 上拆分它，然后在 /&|?/ 上再次拆分code>'='，但我希望这已经为我完成了.另外，如果我在 URL 转义或参数解析中遗漏了一些晦涩的规则怎么办?必须在 ActionPack 或 ActiveSupport 中有一些东西来做到这一点，但我找不到它.

Of course I could use URI.parse to get the params part of the URL, then split it on /&|?/ and then split again on '=', but I'm hoping this is already done for me. Plus, what if I miss some obscure rule in URL escaping or parameter parsing? There has to be something in ActionPack or ActiveSupport to do this, but I can't find it.

谢谢:)

推荐答案

CGI::parse(querystring) 会将查询字符串解析为哈希.然后，CGI::unescape(string) 将撤销值中的任何 URL 编码.

CGI::parse(querystring) will parse a querystring into a hash. Then, CGI::unescape(string) will undo any URL-encoding in the value.

或者，如果您使用的是最新的基于 Rack 的 Rails 版本，您可以使用 Rack::Utils.parse_query 和 Rack::Utils.unescape，并且想要超现代.

Alternatively, you can use Rack::Utils.parse_query and Rack::Utils.unescape if you're on a recent Rack-based version of Rails, and want to be super-modern.

我不知道包装这些实用程序函数的任何特定于 Rails 的帮助方法，但它们使用起来非常简单，而且 CGI 或 Rack 无论如何已经加载到 Rails 环境中.

I'm not aware of any Rails-specific helper methods that wrap these utility functions, but they're pretty simple to use, and CGI or Rack is already loaded in the Rails environment anyway.

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