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Possible Duplicates:
Regex to match URL
regex to remove the webpage part of a url in ruby

I am in search of a regular expression for parsing all the urls in a file.
i tried many of the regular expression i got after googling but it fails in one or the other case . my idea is to write one which checks the presense of http or https at the begening and it will match everything untill it sees a blank space .
any ideas ?
NOTE : i dont need to parse the url but erase all the urls from a file or atleast make it unreadable .

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3
  • P.S.: where do you see Rails here? I delete this tag. Do you know difference between Ruby and Rails? Commented Jan 17, 2011 at 18:37
  • Yeah, the possible duplicates questions are hardly duplicates although one could find the good answer there URI.parse or URI::DEFAULT_PARSER.make_regexp. And I don't even see a reopen vote here. Commented Jan 28, 2023 at 18:08
  • This one is for rails but still not rails only answers: stackoverflow.com/q/161738/520567 Commented Jan 28, 2023 at 18:08

2 Answers 2

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69

The standard URI library provides URI.regexp which is the regular expression for url string.

 require 'uri'
 string.scan(URI.regexp)

http://ruby-doc.org/stdlib/libdoc/uri/rdoc/index.html

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5 Comments

NB there is also a URI.extract method which basically parses all url's out of a string. Very useful.
undefined local variable or method `string' for main:Object (NameError) Did you mean? String
URI.regexp seems to match strings that aren't really valid URLs such as http://x, or even just http:.
string is the variable you create, @FeloVilches
This matches things like C: too
26

You can try this:

/https?:\/\/[\S]+/

The \S means any non-whitespace character.

(Rubular)

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3 Comments

Is that really a uri regex though? That's just looking for any string that starts with http(s)... which is not a uri.
It won't work for the url [https://google.com//]. [ is not a valid url character.
It won't work for urls with quotes as it will include the quotes

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