提取並添加鏈接到字符串中的URL

Question

我有幾個字符串中有鏈接。例如：

var str = "I really love this site: http://www.stackoverflow.com" 

，我需要一個鏈接標籤添加到這樣STR將是：

I really love this site: <a href="http://www.stackoverflow.com">http://www.stackoverflow.com</a> 

Answer 1

一種可能是使用URI class讓它做解析。沿此線的東西：

require 'uri' 

str = "I really love this site: http://www.stackoverflow.com" 
url = str.slice(URI.regexp(['http'])) 
puts str.gsub(url, '<a href="' + url + '">' + url + '</a>') 

Answer 2

您可以使用URI.extract此：

str = "I really love this site: http://www.stackoverflow.com and also this one: http://www.google.com" 

URI.extract(str, ['http', 'https']).each do |uri| 
    str = str.gsub(uri, "<a href=\"#{uri}\">#{uri}</a>") 
end 

str 

以上同時匹配一個字符串多個網址。