ruby 在 Sinatra 中，您如何制作一个“之前”过滤器来匹配除某些路线之外的所有路线
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in Sinatra how do you make a "before" filter that matches all routes except some
提问by lms
I have a Ruby Sinatra app and I have some code which I need to execute on all routes except for a few exceptions. How do I do this?
我有一个 Ruby Sinatra 应用程序，我有一些代码需要在所有路由上执行，除了少数例外。我该怎么做呢？
If I wanted to execute the code on selected routes (whitelist style) I'd do this:
如果我想在选定的路线上执行代码（白名单样式），我会这样做：
['/join', "/join/*", "/payment/*"].each do |path|
before path do
#some code
end
end
How do I do it the other way round though (blacklist style)? I want to match all routes except '/join', '/join/*'and '/payment/*'
我如何反过来做（黑名单样式）？我想匹配除'/join','/join/*'和'/payment/*'
回答by Konstantin Haase
With negative look-ahead:
负前瞻：
before /^(?!\/(join|payment))/ do
# ...
end
With pass:
与pass：
before do
pass if %w[join payment].include? request.path_info.split('/')[1]
# ...
end
Or you could create a custom matcher.
或者您可以创建一个自定义匹配器。
回答by OneChillDude
What I did to make a "before all, except..." filter is use a splat, and then run code on splat conditions.
我所做的制作“之前，除了...”过滤器是使用 splat，然后在 splat 条件下运行代码。
before '/*' do
unless params[:splat] == 'nofilter' || params[:splat] == 'beta'
redirect '/beta'
end
end
This allowed me to make a before filter with a redirect that didn't create a redirect loop
这使我可以使用未创建重定向循环的重定向创建一个 before 过滤器
回答by ben
You can use Regular Expressions for routing in sinatra
您可以使用正则表达式在 sinatra 中进行路由
for example:
例如：
get %r{/hello/([\w]+)} do |c|
"Hello, #{c}!"
end
taken from here. there you can find further informations.
取自这里。在那里您可以找到更多信息。
to build and test your regex you can use http://rubular.com/
要构建和测试您的正则表达式，您可以使用http://rubular.com/
