Slack の incoming WebHook で post する簡単なサンプル

https://${チーム名}.slack.com/services/new で Incoming WebHooks を追加し,
path をコピーする.

slack.rb

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

def post(text)
  data = {
    "text" => text
  }
  request_url = "https://${チーム名}.slack.com/services/hooks/incoming-webhook?token=${トークンキー}"
  uri = URI.parse(request_url)
  http = Net::HTTP.post_form(uri, {"payload" => data.to_json})  
end

post("test")