Question

我最近一直在尝试使用Sinatra，而且我在使用基于正则表达式的路由时遇到了一些“问题”...例如，

get "/something/" do
  status 400
end

匹配/something，但/something/和/somethingelse都不匹配。然而，

get %r{/something/([0-9]{3})} do |number|
  status number
end

匹配/something/201，但也匹配/something/201/和something/201-and-somethingelse。也许我应该重写正则表达式来阅读%r{/something/([0-9]+)$}，但是对我来说包含美元符号是没有意义的，因为这个捕获应该是严格的，对吧？或者我错过了什么？

Answer 1

Sinata遵循Ruby的正常正则规则。来自IRB会议：

pattern = %r{/something/([0-9]{3})}
=> something[0-9]{3}
pattern.match "/something/201"
=> #<MatchData "/something/201" 1:"201">
pattern.match "/something/201/"
=> #<MatchData "/something/201" 1:"201">
pattern.match "something/201-and-somethingelse"
=> nil
pattern.match "/something/201-and-somethingelse"
=> #<MatchData "/something/201" 1:"201">

（这考虑到我上面指出的拼写错误。）

get "/something/" do的另一个示例是字符串，而不是正则表达式，但可以包含某些模式作为方便，例如?。因此：

get "/something/" do # will match "/something/" but not "/something"
get "/something" do # will match "/something" but not "/something/"
get "/something/?" do # will match "/something" and "/something/"

严格的正则表达式路由

1 个答案: