Usage:
> curl http://example.com/headers
> curl http://example.com/hello
> curl http://example.com/stream
> curl http://example.com/stream?interval=0.5s
> curl http://example.com/speed?size=10Gi -o /dev/null
> echo -n "blafasel"| curl  --data-urlencode data@- http://example.com/echo