HubotにQRコード作らせる

gistfile1.coffee

# Description:
#   Show qr-code.
#
# Dependencies:
#   None
#
# Configuration:
#   None
#
# Commands:
#   None
#
# URLS:
#   /qrcode
#
qr           = require 'qr-image'

module.exports = (robot) ->
  robot.router.get /\/qr\/(.+)\.png/, (req, res) ->
    try
      code = qr.image req.params[0], { 'size': 10 }

      length = 0
      data   = []
      code.on 'data', (chunk)->
        length += chunk.length
        data.push chunk

      code.on 'end', ->
        res.writeHead 200, {'Content-Type': 'image/png', 'Content-Length': length}
        res.write v for _, v of data
        res.end()
    catch e
      res.end()

  robot.hear /^qrcode\s(.+)/, (msg)->
    string = encodeURIComponent msg.match[1]
    robot.adapter.notice msg.envelope, "http://manaten.net:9090/qr/#{string}.png"