api-client.sh

#!/bin/bash

WAIT=10
NEXT=0
SESSION=`curl -s https://～/start | jq -r .session_id`
LAST=0

gpspipe -w | jq --unbuffered -c '. | if .class == "TPV" then {lat,lon,time} else empty end' | while read -r f; do
  CURRENT=`date +%s`
  TARGET=$(( LAST + WAIT ))

  if [ $CURRENT -ge $TARGET ]; then
    JSON=`echo $f | jq --arg SESSION $SESSION '.+{"session_id": $SESSION}'`
    
    curl -s "Accept: application/json" -H "Content-type: application/json" -X POST -d "$JSON" https://～/post
    
    LAST="$CURRENT"
  fi
done