Wait for an HTTP endpoint to return 200 OK with Bash and curl

wait_for_http_200.sh

bash -c 'while [[ "$(curl -s -o /dev/null -w ''%{http_code}'' localhost:9000)" != "200" ]]; do sleep 5; done'

# also check https://gist.github.com/rgl/c2ba64b7e2a5a04d1eb65983995dce76

Hi all,

I turned this into a script allowing for various of these behaviors to be configured via parameters.

I'm using it in our CI pipelines to make sure that APIs served by containers are alive before performing the next steps in the pipeline.

I'm very far from being a Bash expert and PR for improvements are very welcome.

Of course feel free the fork if you wish to :)

Thanks! Hope someone could make it to be a github action.

There is https://github.com/nev7n/wait_for_response, however, that doesn't support all the options available in curl.

Hi all,

Here a solution that worked to me. In my case I used it for an initContainer:

sh -c 'while (( curl -s -o /dev/null -w %{http_code} https://google.com/ != "200" && curl -s -o /dev/null -w %{http_code} https://google.com/ != "301")); do sleep 1; done;'

Thanks!
I forked your version and extended it to a script that can be used right away. We use it in the CI to wait for services until they are available.

https://gist.github.com/eisenreich/195ab1f05715ec86e300f75d007d711c

There is https://github.com/nev7n/wait_for_response, however, that doesn't support all the options available in curl.

Thank you that looks neat

this is wonderful thanks for posting this

The following works in Alpine Linux/ash

until [ "$(curl -s -o /dev/null -w "%{http_code}" http://host:port/path)" = "200" ]; do sleep 1; done;