refactor: Use external cors implementation

Signed-off-by: Richie Bendall <richiebendall@gmail.com>

middleware/cors.js

@@ -1,8 +0,0 @@
-module.exports = (_req, res, next) => {
-  res.header('Access-Control-Allow-Origin', '*')
-  res.header(
-    'Access-Control-Allow-Headers',
-    'Origin, X-Requested-With, Content-Type, Accept'
-  )
-  next()
-}

package.json

@@ -28,6 +28,7 @@
     "@sindresorhus/is": "^2.0.0",
     "any-size": "^1.0.0",
     "btoa": "^1.2.1",
+    "cors": "^2.8.5",
     "ejs": "^3.0.1",
     "escape-goat": "^3.0.0",
     "express": "^4.17.1",

routes/post.js

@@ -17,8 +17,10 @@ const { validDomainId } = require('./utils')
 function getUserData ({ query, body }) {
   // If query parameters provided
   if (size(query) > 0) return query
+
   // If the data parsed as {'{data: "value"}': ''}
   if (size(body) === 1 && !Object.values(body)[0]) return JSON.parse(Object.keys(body)[0])
+
   // Fallback
   return body
 }
@@ -26,6 +28,7 @@ function getUserData ({ query, body }) {
 // HTTP POST API
 module.exports = async (req, res) => {
   const { hostname } = req
+
   // Get different parts of hostname (example: remy.mit-license.org -> ['remy', 'mit-license', 'org'])
   const params = hostname.split('.')
 

server.js

@@ -48,7 +48,7 @@ app.use(
 // Middleware
 
 // CORS
-app.use(require('./middleware/cors'))
+app.use(require('cors'))
 // Parse URL-encoded bodies (as sent by HTML forms)
 app.use(
   express.urlencoded({