Match a URL

egrep 'https?://([[:alpha:]]([-[:alnum:]]+[[:alnum:]])*\.)+[[:alpha:]]{2,3}(:\d+)?(/([-\w/_\.]*(\?\S+)?)?)?'

For the record: I didn't build this. Just shared what I found that worked. Apologies to the original author! I decided I should fix the case where http://example.com is not matched for the next time I need this. So I read rfc1035 and formalized the host name regex. If anyone finds any more holes, please comment.

By: putnamhill

2009-11-28 15:41:42

egrep regex url match url matching

2 Alternatives + Submit Alt

Match a URL

From http://daringfireball.net/2009/11/liberal_regex_for_matching_urls Thought it would be useful to commandlinefuers. Show Sample Output
This is sample output - yours may be different.
```
http://foo.com/blah_blah
```
0

echo "(Something like http://foo.com/blah_blah)" | grep -oP "\b(([\w-]+://?|www[.])[^\s()<>]+(?:$[\w\d]+$|([^[:punct:]\s]|/)))"

matthewbauer · 2009-11-28 00:41:57 3
Match a URL

don't have to be that complicated
This is sample output - yours may be different.
-1

cho "(Something like http://foo.com/blah_blah)" | awk '{for(i=1;i<=NF;i++){if($i~/^(http|ftp):\/\//)print $i}}'

unixmonkey7109 · 2009-11-28 03:31:41 6

What Others Think

only matches domains starting with www but still nice

tcfusion · 750 weeks and 5 days ago

It should now match http://example.com if you like to give it another try. Good catch BTW!

putnamhill · 749 weeks and 6 days ago

http://foo.com./blah_blah should match too. Mind the last dot in the domain so I added \.? there too + it does not work for .aero, .arpa, .asia, .coop, .info, .jobs, .mobi, .museum, .name and .travel so I extended from 3 to 6 egrep 'https?://([[:alpha:]]([-[:alnum:]]+[[:alnum:]])*\.)+[[:alpha:]]{2,6}(:\d+)?\.?(/([-\w/_\.]*(\?\S+)?)?)?' Cheers

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