I am trying to remove the webpage part of the URL
For example,
www.example.com/home/index.html
to
www.example.com/home
any help appreciated.
Thanks
-
see also stackoverflow.com/questions/4716513/…rogerdpack– rogerdpack2013-11-23 14:26:53 +00:00Commented Nov 23, 2013 at 14:26
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3 Answers
It's probably a good idea not to use regular expressions when possible. You may summon Cthulhu. Try using the URI library that's part of the standard library instead.
require "uri"
result = URI.parse("http://www.example.com/home/index.html")
result.host # => www.example.com
result.path # => "/home/index.html"
# The following line is rather unorthodox - is there a better solution?
File.dirname(result.path) # => "/home"
result.host + File.dirname(result.path) # => "www.example.com/home"
2 Comments
clyfe
+1 URL's are not regular, cannot parse them with regex, use URI lib
the Tin Man
Addressable::URI is another good URI module for Ruby and is a bit more full-featured. Ruby's built-in URI should be sufficient for this purpose though. github.com/sporkmonger/addressable
If your heart is set on using regex and you know that your URLs will be pretty straight forward you could use (.*)/.* to capture everything before the last / in your URL.
irb(main):007:0> url = "www.example.com/home/index.html"
=> "www.example.com/home/index.html"
irb(main):008:0> regex = "(.*)/.*"
=> "(.*)/.*"
irb(main):009:0> url =~ /#{regex}/
=> 0
irb(main):010:0> $1
=> "www.example.com/home"
Comments
irb(main):001:0> url="www.example.com/home/index.html"
=> "www.example.com/home/index.html"
irb(main):002:0> url.split("/")[0..-2].join("/")
=> "www.example.com/home"
3 Comments
Jason Noble
While this technically works, it will break on different depth URLs (/home/index.html vs /admin/users/index.html). That's why URI.parse is better.
Andrew Grimm
@Jason: Under what circumstance would
0..-2 break?Jason Noble
I re-read this and you're right, 0..-2 should always work. I still vote for using URI.parse though.