Ruby：从字符串中删除

Question

我有网址http://localhost:3000/en/invest_offers?utf8=blahblahblah。我如何获得?utf8=blahblahblah网址的一部分？谢谢！

Answer 1

使用URI::parse，URI::Generic#query：

require 'uri' 

url = 'http://localhost:3000/en/invest_offers?utf8=blahblahblah' 
URI.parse(url) 
# => #<URI::HTTP:0x0000000213aae0 URL:http://localhost:3000/en/invest_offers?utf8=blahblahblah> 
URI.parse(url).query 
# => "utf8=blahblahblah" 

Answer 2

待办事项如下使用URI::Generic.query：

require 'uri' 

URI("http://localhost:3000/en/invest_offers?utf8=blahblahblah").query 
# => "utf8=blahblahblah" 

Answer 3

执行以下操作： -

require 'uri' 
url = 'http://localhost:3000/en/invest_offers?utf8=blahblahblah' 
parsed_url = URI.parse(url) 

，如果你只是想查询字符串部分像"utf8=blahblahblah" 你应该做

parsed_url.query 

，如果你想获得"blahblahblah"， 你应该做的

params["utf8"] 

否则

p = CGI.parse(parsed_url.query) 
# p is now {"utf8"=>["blahblahblah"]} 
p["utf8"].first 
#=> "blahblahblah"