Slack Incoming Webhook in Ruby

slack-incoming-webhook.rb

#!/usr/bin/env ruby

require 'net/http'
require 'uri'
require 'json'

# param `data` will be like this (only `text` is mandatory)
# {
#   channel: '#general',
#   username: 'somebot',
#   text: 'hello world!'
# }

def webhook(hook_url, data={})
  uri = URI.parse(hook_url)
  Net::HTTP.post_form(
    uri,
    { payload: data.to_json }
  )
end