Add an app for resizing images. Still needs rate limiting, and still trying to decide how to pass the correct URL to the app.

lib/roles/storage/plugins/image/index.js

@@ -0,0 +1,47 @@
+var http = require('http')
+var util = require('util')
+
+var express = require('express')
+var Promise = require('bluebird')
+var gm = require('gm')
+
+var logger = require('../../../../util/logger')
+
+var parseCrop = require('./param/crop')
+var parseGravity = require('./param/gravity')
+var get = require('./task/get')
+var transform = require('./task/transform')
+
+module.exports = function(options) {
+  var log = logger.createLogger('storage:plugins:image')
+    , app = express()
+    , server = http.createServer(app)
+
+  app.set('strict routing', true)
+  app.set('case sensitive routing', true)
+  app.set('trust proxy', true)
+
+  app.get('/api/v1/resources/:id/*', function(req, res) {
+    get(req.params.id, options)
+      .then(function(stream) {
+        return transform(stream, {
+          crop: parseCrop(req.query.crop)
+        , gravity: parseGravity(req.query.gravity)
+        })
+      })
+      .then(function(out) {
+        res.status(200)
+        out.pipe(res)
+      })
+      .catch(function(err) {
+        log.error('Unable to transform resource "%s"', req.params.id, err.stack)
+        res.status(500)
+          .json({
+            success: false
+          })
+      })
+  })
+
+  server.listen(options.port)
+  log.info('Listening on port %d', options.port)
+}