Curl utils
Here are some options and command I use with curl when dealing with stuff
I have to develop.
curl -si <ip> # -s is the silent flag, it removes the progress
# -i displays the headers
curl -X POST -H "Content-Type: application/json" -u "admin:admin" -d '{}' <ip>
# -X set up the http method (here POST)
# -H set up an header, format is: "header_name: value"
# -u support for Basic Auth, format is: "user:password"
# -d set up data to send to the server
I mostly use those options, the -s is really interesting when you want to
grep the content.
So, when testing availability of an http service, I use this snippet:
while true; do curl -si <ip>|awk 'NR==1||NR==3'; sleep 1; done
This will do kind of a ping for an http service, displaying this:
HTTP/1.1 200 OK
Date: Tue, 19 Jul 2016 12:23:43 GMT
HTTP/1.1 200 OK
Date: Tue, 19 Jul 2016 12:23:45 GMT
HTTP/1.1 200 OK
Date: Tue, 19 Jul 2016 12:23:46 GMT
The status of the http call, and the date of the call has been done.