feat: initialize microservices architecture with User, AI Banking, and API Gateway servers

Author: raorajan

server/ai-banking-service/src/server.ts

@@ -1,6 +1,5 @@
 import express, { Application, Request, Response } from 'express';
 import dotenv from 'dotenv';
-import cors from 'cors';
 import helmet from 'helmet';
 import aiRoutes from './routes/ai.routes';
 
@@ -9,7 +8,6 @@ dotenv.config();
 const app: Application = express();
 const PORT = process.env.PORT || 8004;
 app.use(helmet());
-app.use(cors());
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 

server/api-gateway/src/server.ts

@@ -121,11 +121,8 @@ const combinedDocs = {
 
 app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(combinedDocs));
 
-// 3. Proxy Routes with CORS Header Management
 
-// Function to process CORS headers on proxied responses
 const processCorsHeaders = (headers: any, req: Request) => {
-  // Remove backend service CORS headers to prevent conflicts
   delete headers['access-control-allow-origin'];
   delete headers['Access-Control-Allow-Origin'];
   delete headers['access-control-allow-credentials'];
@@ -135,7 +132,6 @@ const processCorsHeaders = (headers: any, req: Request) => {
   delete headers['access-control-allow-headers'];
   delete headers['Access-Control-Allow-Headers'];
 
-  // Set gateway CORS headers
   const origin = req.headers.origin;
   if (NODE_ENV !== 'production') {
     headers['Access-Control-Allow-Origin'] = origin || '*';
@@ -152,7 +148,6 @@ const processCorsHeaders = (headers: any, req: Request) => {
   return headers;
 };
 
-// Proxy /api/v1/ai to AI Service
 app.use('/api/v1/ai', proxy(API_AI_URL, {
   proxyReqPathResolver: (req) => req.originalUrl,
   preserveHostHdr: true,
@@ -169,27 +164,21 @@ app.use('/api/v1/ai', proxy(API_AI_URL, {
   userResHeaderDecorator: (headers, req) => processCorsHeaders(headers, req as Request)
 }));
 
-// Catch-all for /api/v1 to proxy to User Service
 app.use('/api/v1', proxy(API_USER_URL, {
   proxyReqPathResolver: (req) => req.originalUrl,
   preserveHostHdr: true,
-  // Preserve headers
   proxyReqOptDecorator: (proxyReqOpts, srcReq) => {
     proxyReqOpts.headers = {
       ...proxyReqOpts.headers,
       'Origin': srcReq.headers.origin || 'http://localhost:3002',
     };
     return proxyReqOpts;
   },
-  // Ensure the body is correctly forwarded after being parsed by express.json()
   proxyReqBodyDecorator: (bodyContent, srcReq) => {
     return srcReq.body && Object.keys(srcReq.body).length ? JSON.stringify(srcReq.body) : bodyContent;
   },
-  // Process CORS headers on response
   userResHeaderDecorator: (headers, req) => processCorsHeaders(headers, req as Request)
 }));
-
-// Health Check
 app.get('/', (req: Request, res: Response) => {
   res.json({ success: true, message: 'API Gateway is running' });
 });

server/user-services/src/server.ts

@@ -1,6 +1,5 @@
 import express, { Application, Request, Response } from 'express';
 import dotenv from 'dotenv';
-import cors from 'cors';
 import helmet from 'helmet';
 import { connectDB } from './config/database';
 import authRoutes from './routes/auth.routes';
@@ -14,12 +13,9 @@ app.set('trust proxy', 1);
 app.use(helmet()); 
 app.use(passport.initialize());
 
-// CORS is handled by API Gateway - disable here to prevent conflicts
-// app.use(cors()); 
 app.use(express.json()); 
 app.use(express.urlencoded({ extended: true })); 
 
-// Debug logging for paths
 app.use((req, res, next) => {
   console.log(`[DEBUG] Incoming Request: ${req.method} ${req.path}`);
   next();