   UrlModel.count (err, length) ->
     return handleError res, err  if err
 
+    page = (req.query.page || 1) - 1
+    return handleError res, new Error 'Wrong page parameter'  if page < 0
+
+    pagePerNumber = req.query.pagePerNumber || 20
     result = {total: length}
-    query = UrlModel.find().sort({createdAt: -1}).limit(20)
+    query = UrlModel.find().sort({createdAt: -1})
+      .skip(page * pagePerNumber)
+      .limit(pagePerNumber)
     query.exec (err, urls) ->
       return handleError res, err  if err
       res.status(200).json _.merge result, {urls: urls}

ddurl = require '../../components/ddurl'

_checkUrl = (url) ->
  regexp = /[-a-zA-Z0-9@:%_\+.~#?&//=]{2,256}\.[a-z]{2,4}\b(\/[-a-zA-Z0-9@:%_\+.~#?&//=]*)?/gi
  return regexp.test url



# expand url in the DB.
exports.expand = (req, res) ->
  if not _checkUrl req.query.shortUrl
    return res.status(400).send 'Bad Request'

  parse = url.parse req.query.shortUrl, true
