Pure bash OpenTSP site feed client (for debugging)

sitefeed_client.sh

#!/usr/bin/env bash
#
# Accepts OpenTSDB line protocol connections
# Responds to `version` requests
# Outputs everything else to stdout

tsdb_connector() { nc -l -k 0 4545 ; }
coproc TSDB { tsdb_connector; }

while IFS='' read -ru ${TSDB[0]} line; do
  if [ "$line" == "version" ]; then
    echo "Built on <unknown> (bash_tsp_client)" >&${TSDB[1]}
  else
    echo "$line"
  fi
done

# 1-liner:
# ( tsdb_connector() { nc -l -k 0 4545 ; } ; coproc TSDB { tsdb_connector; } ; while IFS='' read -ru ${TSDB[0]} line; do if [ "$line" == "version" ]; then echo "Built on <unknown> (bash_tsp_client)" >&${TSDB[1]} ; else echo "$line" ; fi; done; )