从字符串中提取URL？

Question

  

可能重复：
  Extract Url From a String

我有一个字符串：

abchghhdgfdgfdfdfhttp://www.rajasthanpatrika.com/News/World/1132013/international news/414309\r\n\t\t\t\t     ghjghjfhjvfhjhfj"

我想提取网址：

http://www.rajasthanpatrika.com/News/World/1132013/international news/414309

我该怎么做？

Answer 1

s = "abchghhdgfdgfdfdfhttp://www.rajasthanpatrika.com/News/World/1132013/international news/414309\r\n\t\t\t\t ghjghjfhjvfhjhfj"
s[/http:\/\/.*?(?=[\r\n\t])/]
# => "http://www.rajasthanpatrika.com/News/World/1132013/international news/414309"