add url encode / secure isipv4

profile.d/net.sh

@@ -41,6 +41,7 @@ isipv4()
 {
     # Set up local variables
     local ip=$1
+    [[ -z $ip ]] && return 1
 
     # Start with a regex format test
     if [[ $ip =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
@@ -83,5 +84,24 @@ isipv6()
 }
 export -f isipv6
 
+# ------------------------------------------------------------------------------
+# Encode a string so it can be used as a URL parameter
+# ------------------------------------------------------------------------------
+urlencode() {
+    local LANG=C
+    local str="$*"
+    local length="${#str}"
+    for (( i = 0; i < length; i++ )); do
+        local c="${str:i:1}"
+        case "$c" in
+            [a-zA-Z0-9.~_-]) printf "$c" ;;
+            ' ') printf '+' ;;
+            *) printf '%%%02X' "'$c" #| cut -d' ' -f2 ;;
+        esac
+    done
+}
+export -f urlencode
+
+
 # ------------------------------------------------------------------------------
 # EOF