Enhance CORS middleware to include referer checks and improve security for whitelisted domains

config/config.js

@@ -15,13 +15,17 @@ if (process.env.USE_SSL === 'true') {
   }
 }
 
-// CORS Configuration
+// CORS Configuration - Whitelisted domains that can access the API
 const allowedOrigins = [
-  'http://uniformnetwork.com',
-  'http://localhost',
   'https://crewsportswear.com',
+  'https://www.crewsportswear.com',
   'https://crewsportswear.app',
-  'https://merchbay.com'
+  'https://dev-crew.crewsportswear.app',
+  'https://merchbay.com',
+  'https://www.merchbay.com',
+  'https://dev.merchbay.app',
+  'http://localhost',
+  'http://localhost:8080'
 ];
 
 // Screenshot Configuration

middleware/cors.js

@@ -1,17 +1,46 @@
 const { allowedOrigins } = require('../config/config');
 
 /**
- * CORS middleware
- * Handles Cross-Origin Resource Sharing for allowed domains
+ * CORS and Security middleware
+ * Only allows requests from whitelisted domains
  */
 function corsMiddleware(req, res, next) {
   const origin = req.headers.origin;
+  const referer = req.headers.referer;
   
-  if (allowedOrigins.indexOf(origin) > -1) {
+  // Check if origin is allowed
+  const isOriginAllowed = origin && allowedOrigins.indexOf(origin) > -1;
+  
+  // Check if referer matches allowed domains
+  const isRefererAllowed = referer && allowedOrigins.some(allowed => {
+    try {
+      const refererHost = new URL(referer).origin;
+      return refererHost === allowed || referer.startsWith(allowed);
+    } catch (e) {
+      return false;
+    }
+  });
+  
+  // Allow if origin OR referer is whitelisted
+  // Also allow health check endpoint without restrictions
+  if (req.path === '/health') {
+    return next();
+  }
+  
+  if (!isOriginAllowed && !isRefererAllowed) {
+    console.warn(`Blocked request from Origin: ${origin || 'none'}, Referer: ${referer || 'none'}`);
+    return res.status(403).json({ 
+      error: 'Forbidden', 
+      message: 'Access denied. This API is restricted to authorized domains only.' 
+    });
+  }
+  
+  // Set CORS headers for allowed origin
+  if (isOriginAllowed) {
     res.setHeader('Access-Control-Allow-Origin', origin);
   }
   
-  res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
+  res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
   res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
   res.setHeader('Access-Control-Allow-Credentials', true);