unitproc/bktemp-checkURL

   1 #!/bin/bash
   2
   3 checkURL() {
   4     # Desc: Checks if string is a valid URL.
   5     # Warning: Does not correctly handle multi-byte characters.
   6     # Version: 0.0.2
   7     # Input: arg1: string
   8     # Output: return code 0: string is a valid URL
   9     #         return code 1: string is NOT a valid URL
  10     # Depends: Bash 5.0.3
  11     # Ref/Attrib: https://stackoverflow.com/a/3184819
  12     regex='(https?|ftp|file|ssh|git)://[-A-Za-z0-9\+&@#/%?=~_|!:,.;]*[-A-Za-z0-9\+&@#/%=~_|]'
  13     arg1="$1";
  14     if [[ $arg1 =~ $regex ]]; then
  15         return 0;
  16     else
  17         return 1;
  18     fi;
  19 }
  20
  21 #==BEGIN sample code
  22 testString="https://google.com/security.main.html"
  23 if checkURL "$testString"; then echo "Is a valid URL:$testString"; else echo "Is NOT a valid URL:$testString"; fi;
  24 testString="ssh://username@host.xz/absolute/path/to/repo.git/"
  25 if checkURL "$testString"; then echo "Is a valid URL:$testString"; else echo "Is NOT a valid URL:$testString"; fi;
  26 #==END sample code