Simplify repetitive curl args on Confluent Platform ansible deployed components

cp-curl.sh

#!/usr/bin/env bash

# Author: Kel Graham
# Date:   2021-03-30
# Purpose: 
#   This script wraps curl with caroot, cert and key files obtained from the standard
#   /var/ssl/private folder used by cp-ansible for deployed Confluent Platform components.
#   The idea is to allow you to get on with hitting the Schema Registry REST endpoing
#   without faffing around providing repetitive cert args.
#   Does some super basic checks if we are registering Schemas on SR and provides the
#   correct content type if there is a POST detected.

ARGS="$@"

BASE=$(basename /var/ssl/private/*.key|cut -d. -f1)

CERTS_PATH="/var/ssl/private"

isSR=0
isPOST=0


echo "Confluent Platform curl hurler v0.1" > /dev/stderr

for a in $ARGS; do
        if [[ "$a" =~ .*/subjects/.*versions ]]; then
                echo "  ...detected Schema Registry operation" > /dev/stderr
                isSR=1
        fi
        if [[ "$a" =~ -X.*POST ]]; then
                echo "  ...detected POST operation" > /dev/stderr
                isPOST=1
        fi
done

if [ $isSR == 1 ] & [ $isPOST == 1 ]; then
        ARGS="${ARGS} -H 'Content-Type: application/vnd.schemaregistry.v1+json'" 
        ARGS="${ARGS} -H 'Accept: application/json' "
else
        ARGS="${ARGS} -H 'Content-Type: application/json' "
fi

ARGS="  --cacert ${CERTS_PATH}/ca.crt           \
        --cert ${CERTS_PATH}/${BASE}.crt        \
        --key ${CERTS_PATH}/${BASE}.key         \
        ${ARGS}"

echo "" > /dev/stderr
eval "curl $ARGS"
echo "" > /dev/stderr