I have no idea how to use generators, eh...

howto-generator.coffee

q = require 'q'
request = q.denodeify require 'request'

xml2js = require 'xml2js'
parser = new xml2js.Parser()
parseString = q.denodeify parser.parseString

api = "http://www.metmuseum.org/collection/the-collection-online/search"

getEndpoint = (endpoint) ->
  (next) -->
    start = Date.now()
    yield request api+endpoint
    delta = Math.ceil(Date.now() - start)
    @set 'X-Response-Time-Upstream', delta + 'ms'

getObject = (next) -->
  xml = yield getEndpoint "/#{@params['id']}?xml=1"
  @body = yield parseString xml

koa = require 'koa'
logger = require 'koa-logger'
router = require 'koa-router'

app = koa()
app.use logger()
app.use router(app)
app.get '/object/:id', getObject
app.get '/search/:term', getIds

app.listen process.env.PORT or 5000, ->
  console.log "[#{process.pid}] listening on port #{+@_connectionKey.split(':')[2]}"

package.json

{
  "name": "collections-api",
  "homepage": "http://scrAPI.org",
  "bugs": "http://github.com/jedahan/collections-api/issues",
  "contributors": [
    "Jonathan Dahan"
  ],
  "licenses": [
    "ISC"
  ],
  "version": "0.0.9",
  "description": "frontend api services",
  "author": "Jonathan Dahan <jonathan@jonathan.is>",
  "keywords": [
    "scrape",
    "api",
    "museum"
  ],
  "dependencies": {
    "coffee-script": "https://github.com/xixixao/coffee-script/tarball/master",
    "koa": "^0.6.1",
    "koa-logger": "^1.2.1",
    "koa-router": "^3.1.4",
    "q": "^1.0.1",
    "request": "^2.35.0",
    "xml2js": "^0.4.2"
  },
  "engines": {
    "node": "^0.11.13",
    "npm": "^1.4.9"
  },
  "scripts": {
    "start": "coffee --nodejs --harmony server.coffee"
  },
  "repository": {
    "type": "git",
    "url": "http://github.com/jedahan/collections-api.git"
  }
}