Sleeping Server is a kind of joke app which however can - in some cases - also help with some serious tests ;)
Usage
There is one API method which can take one parameter:
http(s)://sleeping.server.org/:sleepValue
Where :sleepValue is the delay value after which the server sends a response.
The delay value is calculates as the :sleepValue times valueMultiplier, where valueMultiplier is an environment vairable (by default equals to 1000 - and in such case we can say that :sleepValue is a number of seconds - more or less ;)).
Docker image
Use the "standard" procedure, run in the main project directory:
docker buid -t sleeping:test .
Example
Test1
with sleepValue equals 5 (with default multiplier = 1000):
$ date; time http http://localhost:3000/5 -b; date
Wed Nov 16 09:02:02 CET 2022
Woke up after 5 second(s) of sleep!
... 0.35s user 0.15s system 8% cpu 5.655 total
Wed Nov 16 09:02:08 CET 2022
On the server console you can see something like below (i have leveraged the docker logs with timestamps):
$ docker run --rm -p 3000:3000 -d sleeping:test
$ docker logs -tf agitated_elgamal
2022-11-16T08:00:23.621848495Z Sleeping server listening on port 3000
2022-11-16T08:02:03.494774343Z Going to sleep for 5 second(s)!
2022-11-16T08:02:08.498342553Z Wake up! 5 second(s) passed.
Test2
Simultaneous requests:
$ date; for I in $(seq 5 -2 1); do \
((http GET http://localhost:3000/$I -b | cat - && echo -n ' -- ' && date) &) \
done
Wed Nov 16 09:03:47 CET 2022
Woke up after 1 second(s) of sleep! -- Wed Nov 16 09:03:48 CET 2022
Woke up after 3 second(s) of sleep! -- Wed Nov 16 09:03:50 CET 2022
Woke up after 5 second(s) of sleep! -- Wed Nov 16 09:03:52 CET 2022
And from "the server side":
2022-11-16T08:03:47.917399749Z Going to sleep for 5 second(s)!
2022-11-16T08:03:47.923730533Z Going to sleep for 1 second(s)!
2022-11-16T08:03:47.924537943Z Going to sleep for 3 second(s)!
2022-11-16T08:03:48.925443668Z Wake up! 1 second(s) passed.
2022-11-16T08:03:50.925969532Z Wake up! 3 second(s) passed.
2022-11-16T08:03:52.918711537Z Wake up! 5 second(s) passed.
Configuration (environment values)
port- on which port the application (server) should be listiningvalueMultiplier- the multiplier for thesleepValue(by default 1000, what makesseepValuenumber close to seconds)