nats-cli-utils

nats-cli-utils

A small collection of command line tools for working with nats messaging system.

To get all commands, run:

go get -v -u github.com/Forau/nats-cli-utils/...                                                                             

nats-tail

Usage: nats-tail <flags> subject

Arguments:
     subject: The NATS subject to listen on. Wildcards are supported.

Flags:
  -raw
        Short for template that just prints the data as it comes. Is equal to -t "{{.Data|printf "%s"}}"
  -templ string
        Template for output in golang text/template format with some added functions (default "{{time.Unix}}\t{{.Subject}}\t{{.Reply}}\n\t{{.Data | hex }}")
  -url string
        Uri to connect with NATS (default "nats://localhost:4222")

nats-srv

depricated Will not continue building this command. Experimental state. Dont expect it to be useful yet. Services are chained together, sort of like unix pipes. Currently just a few exists, but more will come.

Usage: nats-srv <flags> (subject) service <flags> <args> service <flags> <args>...

Flags:
  -raw
        If set, any service can be first in chain instead of 'nats-srv'
  -url string
        Connection url to pass to service 'nats-srv' (default "nats://localhost:4222")

Services:
nats-srv  <flags>  arg0
  func(chan interface {}) error
         -url   Connection to nats      (nats://localhost:4222)
         Arg0 Subject to subscribe to

echo
  func(interface {}) interface {}

teelog  <flags>
  func(interface {}) (interface {}, error)
         -file  Where to log stream to. Filename, or - which is stdout  (-)
         -format        Printf format for the value     (%!s(MISSING))
         -prefix        The prefix to put on log rows   ()

printf  arg0
  func(interface {}) (interface {}, error)
         Arg0 Format to print the value in

exec  <flags>  arg0
  func(interface {}) (interface {}, error)
         -args  The arguments for the command. Make sure it is 'one flag'. It will be split on spaces for the final arguments   ()
         Arg0 Command to execute

Example usages can be:

nats-srv subj printf "I got your %s" echo

Which will reply on calls to 'subj' with some appended text.

Other example can be:

nats-srv subj teelog -file log.log exec -args "www.google.com 80" nc

Which would log the request to log.log, then run execute netcat and send what was posted to subj to google, and return the result.