native camo support

Author: sorah

index.coffee

@@ -43,7 +43,8 @@ app.get '/', (req, res)-> res.render 'index'
 app.get '/gifs', require('./lib/gif').index
 app.post '/gifs', require('./lib/gif').add
 app.get '/gifs/queue', require('./lib/queue').index
-app.get /^\/gifs\/retrieve\/(.+)$/, require('./lib/gif').retrieve
+unless process.env.CAMO_URL
+  app.get /^\/gifs\/retrieve\/(.+)$/, require('./lib/gif').retrieve
 app.get '/screen', (req, res)-> res.render 'screen'
 app.get '/bpm', require('./lib/bpm').get
 app.get '/usage', (req, res)-> res.render 'usage'

lib/queue.coffee

@@ -1,10 +1,28 @@
+
+Crypto = require 'crypto'
+generateCamoUrl  = (url) ->
+  hmac = Crypto.createHmac("sha1", process.env.CAMO_KEY)
+  hmac.update(url, 'utf8')
+  digest = hmac.digest('hex')
+
+  buf = ""
+  for i in [0...url.length]
+    buf += url.charCodeAt(i).toString(16)
+  hexurl = buf.toString()
+
+  "#{process.env.CAMO_URL}/#{digest}/#{hexurl}"
+
 redis = process.globals.redis
 
 trimQueue = ->
   redis.ltrim 'queue', -10, -1
 
 exports.add = (url)->
-  console.log(url)
+  console.log("queue.add: #{url}")
+  if !url.match(/\.kosendj-bu\.in\//) && process.env.CAMO_URL 
+    url = generateCamoUrl(url)
+    console.log("queue.add-camo: #{url}")
+
   redis.rpush 'gifs', url
   redis.rpush 'queue', url, -> trimQueue()