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# 1  
Old 11-29-2016
Regex for a valid URL
Hi guys,
What is the regex to check for only valid URL from a file using grep?
# 2  
Old 11-29-2016
Quote:
Originally Posted by Meeran Rizvi
Hi guys,
What is the regex to check for only valid URL from a file using grep?
Hello Meeran,

As a starting point could you please try following and let me know if this helps you. Let's say we have following Input_file.
Code:
cat  Input_file
http://google.com/test
http://raddi.com/raddi

Following is the code for same.
Code:
awk '{match($0,/.*[:]\/\/.*\/[[:alnum:]]+/);print substr($0,RSTART,RLENGTH);}'  Input_file

Output will be as follows.
Code:
http://google.com/test
http://raddi.com/raddi

Thanks,
R. Singh
Last edited by RavinderSingh13; 11-29-2016 at 07:15 AM..
# 3  
Old 11-29-2016
Hi.

See also thread Regex for URLs and files for a perl solution.

Best wishes ... cheers, drl
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