consul_curl

consul_curl() {
  local HELP='consul_curl -c CONSUL_ENDPOINT -n SERVICE_NAME -p PATH'
  HELP+=' [-d CONSUL_DC] [-- additional curl options]'

  [ $# -lt 6 ] && echo $HELP 1>&2 && return 1

  local OPTIND OPT consul_endpoint consul_servicename service_path \
    consul_datacenter consul_dnsrr consul_nodename service_port consul_zone

  while getopts ":hc:n:p:d:" OPT; do
      case "${OPT}" in
          c)
              consul_endpoint="${OPTARG}"
              ;;
          n)
              consul_servicename="${OPTARG}"
              ;;
          p)
              service_path="${OPTARG}"
              ;;
          d)
              consul_datacenter="${OPTARG}."
              ;;
          \?)
              echo "Invalid option: -$OPTARG" 1>&2
              echo $HELP 1>&2
              return 1
              ;;
          :)
              echo "Option -$OPTARG requires an argument." 1>&2
              echo $HELP 1>&2
              return 1
              ;;
          h|*)
              echo $HELP 1>&2
              return 1
              ;;
      esac
  done
  shift $((OPTIND-1))

  consul_zone=".service.${consul_datacenter}consul"
  consul_dnsrr=$(dig @${consul_endpoint} +noall +short SRV ${consul_servicename}${consul_zone} | head -1)
  consul_nodename=$(echo ${consul_dnsrr} | awk '{print $4}')
  consul_nodeip=$(dig @${consul_endpoint} +noall +short ${consul_nodename})
  service_port=$(echo ${consul_dnsrr} | awk '{print $3}')

  curl -s -H "Host: ${consul_servicename}${consul_zone}" "http://${consul_nodeip}:${service_port}${service_path}" "$@"
}