url-ok 
url-ok is a HTTP and HTTPS status checker for URLs. The default timeout is 120 seconds at
which point it will abort the checks and the process will have an exit code of 1. If all
the checks are successfull (success is defined as returning 200), the process will have an
exit code of 0.
If a URL cannot be reached, it will continue to try to reach the URL every second up to the timeout. For HTTP, it uses a HEAD request while for HTTPS it uses GET.
Options
--timeout to set a specific timeout in seconds (default 120 seconds)
--interval to set a specific interval between attempts (defaults to one second)
--verbose to enable verbose output
--debug to enable extremely verbose output
Example of a successful run
# url-ok http://www.google.com/ http://www.microsoft.com/ http://www.apple.com/ --verbose
Waiting up to 120 seconds for response(s).
Requesting http://www.google.com/
Requesting http://www.microsoft.com/
Requesting http://www.apple.com/
200 'http://www.google.com/'
200 'http://www.apple.com/'
200 'http://www.microsoft.com/'
Received successful response for all URLs.
# echo $?
0
Example of failing run
# url-ok http://no.such.server.localhost/ --timeout 10 --interval 2 --verbose
Waiting up to 10 seconds for response(s).
Requesting http://no.such.server.localhost/
Aborting after 10 seconds!
At least one URL failed to respond!
# echo $?
1
Example of failing run with debugging
# url-ok http://no.such.server.localhost/ --timeout 2 --interval .5 --verbose --debug
Waiting up to 2 seconds for response(s) with check every 0.5 seconds.
Requesting http://no.such.server.localhost/
DEBUG: requesting http://no.such.server.localhost/ (interval: 500ms)
DEBUG: error http://no.such.server.localhost/ Error: getaddrinfo ENOTFOUND
DEBUG: requesting http://no.such.server.localhost/ (interval: 500ms)
DEBUG: error http://no.such.server.localhost/ Error: getaddrinfo ENOTFOUND
DEBUG: requesting http://no.such.server.localhost/ (interval: 500ms)
DEBUG: error http://no.such.server.localhost/ Error: getaddrinfo ENOTFOUND
DEBUG: requesting http://no.such.server.localhost/ (interval: 500ms)
DEBUG: error http://no.such.server.localhost/ Error: getaddrinfo ENOTFOUND
Aborting after 2 seconds!
At least one URL failed to respond!
Install
npm install -g url-ok
Todo
- add timestamps to logging
- log which URL(s) actually failed
- log time duration to reach success