14 Feb 2011
Making Lingr Bot

Background

I wrote an article about new Lingr bot (Japanese) about 1 year ago, but recently, Lingr API had been changed.

So I try to use new API and write a note for it.

This note is based on this official document.

What's changed?

Bots now can say to room on bot's own will.
Now JSON params will send without json= (params[:json])

Try name calling bot

require "sinatra"
require "json"

post "/hi" do
  j = JSON.parse(request.body.string)
  j["events"].map{ |e|
    if e["message"]
      "Hi, #{e["message"]["nickname"]}!"
    end
  }.compact.join("\n")+"\n"
end

Lingr will post a JSON to bot's endpoint.

JSON is like:

  {"status":"ok",
   "counter":208,
   "events":[
    {"event_id":208,
     "message":
      {"id":82,
       "room":"myroom",
       "public_session_id":"UBDH84",
       "icon_url":"http://example.com/myicon.png",
       "type":"user",
       "speaker_id":"kenn",
       "nickname":"Kenn Ejima",
       "text":"yay!",
       "timestamp":"2011-02-12T08:13:51Z",
       "local_id":"pending-UBDH84-1"}}]

Quoted from the document

deploy this code to web, then register to lingr, finally invite your bot to room.

Note: You can create a bot from here

Try self posting

#-*- coding: utf-8 -*-
require "sinatra"
require "json"
require "open-uri"

Thread.new do
  t = nil
  loop do
    if t.nil? || Time.now.min > t
      t = Time.now.min
      text = "#{Time.now} ですがだるいです"
      open("http://lingr.com/api/room/say?room=ROOM&bot=BOT_NAME&text=#{URI.escape(text)}&bot_verifier=YOUR_VERIFIER"){|io| io.read }
    end
    sleep 15
  end
end

post "/darui" do
  j = JSON.parse(request.body.string)
end

Posting API is http://lingr.com/api/room/say?room=ROOM&bot=BOT_NAME&text=TEXT&bot_verifier=YOUR_VERIFIER
- ROOM: room id. http://lingr.com/room/ROOM_ID
- BOT_NAME: bot id. You can reference at http://lingr.com/developer
- TEXT: URL escaped body (It'll appear on room)
- YOUR_VERIFIER: bot verifier. ruby -rdigest/sha1 -e'puts Digest::SHA1.hexdigest("BOT_NAME"+"BOT_SECRET")'; BOT_SECRET is at http://lingr.com/developer

Deploy this code to web, then register to lingr, finally invite your bot to room.