user is logged in on a ssh connection and has to call a rest service running on his local machine

call-rest-service-on-caller-machine.sh

#!/bin/bash

foo=$(pstree -c -p -s $$ | awk -Fsshd '{print $3}' | cut -f2 -d '(' | tr -d ')' | tr -d '-')
caller=$(who -u | grep $foo | cut -f2 -d '(' | tr -d ')')

# a few other ways to get the IP 
TTy=$(ps -eo pid,tty|grep $$|awk '{print $2}')
WhoAmI=$(who -u |grep -e "$TTy")
TheIp=$(echo $WhoAmI | awk '{print $7}' | sed 's/[()]//g'

read INPUT
curl --header "Content-type: application/json" --request POST --data $INPUT http://$caller/rest/service

# user is logged in on a ssh connection and has to call a rest service running on his local machine
# cat json-data.json | call-rest-service-on-caller-machine.sh