How to make asynchronous function calls in shell scripts
Something to experiment with:
delayed_ajax() { local url=$1 local callback=$2 local seconds=$3 sleep $seconds curl -s "$url" | "$callback"}my_handler() { # Read from stdin and do something. # E.g. just append to a file: cat >> /tmp/some_file.txt}for delay in 120 30 30 3000 3000; do delayed_ajax http://www.example.com/api/something my_handler $delay &done
You can also use the & symbol to put this task into the background:
sleep 14 && wget http://yoursitehere.com &sleep 18 && wget http://yoursitehere.com &sleep 44 && wget http://yoursitehere.com &This creates a background task that sleeps for a fixed amount of time, then runs the command. It doesn't wait for each of the tasks to finish.
&& here means that if the previous thing completes without an error, do the next thing.