Find and open a remote machine's localhost server

findAndOpenLocalhost.sh

# This script is to find and open the localhost server of a target remote
# machine connected to the same network and identified by name, in cases where `mymachine.local` is not available. 
# There's a default machine named "XXX", script accepts custom machine names as first argument. 
# The localhost port defaults to 3000 but
# can also be passed as an argument. Script has been tested on Mac OS only. 

# USAGE: ./findAndOpenLocalhost.sh <machine_name> <port_number> 


#!/bin/sh

# Uppercase user input for machine name, or use default:
TARGET="$(awk '{print toupper($0)}' <<< $1)"
if [ "$TARGET" = "" ] ; then
    echo "no target specified, running default: xxx"
    TARGET="XXX"
fi

# Scan all machines in local network:
ALLCONNECTIONS="$(arp -a)"

# Select IP addresses only:
IPS_RAW="$(echo "$ALLCONNECTIONS" | grep -E "([0-9]{1,3}[\.]){3}[0-9]{1,3}" | awk '{print $2}')" 
# Remove parentheses from IP addresses:
IPS="$(echo "$IPS_RAW" | tr -d '()')"

echo "searching target..."

SUCESS=""

# Check Server Name of each IP address, and compare it to the target:
for i in $IPS; do
    CHECK=$(smbutil status $i | grep "Server:")
    if [ "$CHECK" = "Server: $TARGET" ]; then
        SUCESS="true"
        echo "$TARGET opened in Chrome browser"
        TARGETIP="$i"
        URL="http://$TARGETIP:3000"
        if [ "$2" != "" ]; then
            URL="http://$TARGETIP:$2"
        fi
        open -a "Google Chrome" $URL
        break
    fi
done

if [ "$SUCESS" = "" ]; then
    echo "Target not found. Scanned ip's: \n$IPS"
fi