Feedback

.gitignore

@@ -0,0 +1,38 @@
+# Node modules (both backend and frontend)
+**/node_modules
+
+# Logs
+**/npm-debug.log*
+**/yarn-debug.log*
+
+# Environment variables
+**/.env
+**/.env.local
+**/.env.development.local
+**/.env.test.local
+**/.env.production.local
+
+# Build directory (React frontend)
+**/build/
+**/dist/
+
+# Coverage directory
+**/coverage/
+
+# Optional npm cache directory
+**/.npm
+
+# Optional yarn cache directory
+**/.yarn/
+
+# VS Code settings
+**/.vscode/
+
+# Jetbrain 
+**/.idea
+
+# macOS
+**/.DS_Store
+
+# Windows
+**/Thumbs.db

README.md

@@ -1,7 +1,25 @@
 # CS3219 Project (PeerPrep) - AY2425S1
-## Group: Gxx
 
-### Note: 
-- You can choose to develop individual microservices within separate folders within this repository **OR** use individual repositories (all public) for each microservice. 
-- In the latter scenario, you should enable sub-modules on this GitHub classroom repository to manage the development/deployment **AND** add your mentor to the individual repositories as a collaborator. 
-- The teaching team should be given access to the repositories as we may require viewing the history of the repository in case of any disputes or disagreements. 
+## Group: G12
+
+### How to Run the Project
+
+Follow the steps below to set up and run the project using Docker Compose.
+
+### Prerequisites
+
+Make sure Docker and Docker Compose are installed on your machine.
+
+#### Installing Docker
+
+If you haven't installed Docker yet, follow the instructions for your operating system:
+
+-   **Windows / macOS**: Download Docker Desktop from [here](https://www.docker.com/products/docker-desktop) and install it.
+-   **Linux**: Follow the instructions [here](https://docs.docker.com/engine/install/).
+
+### Build and start docker container
+
+Run these command at the root directory:
+
+1. `docker-compose build`
+2. `docker-compose up`

api-gateway/.env.sample

@@ -0,0 +1 @@
+PORT=

api-gateway/Dockerfile

@@ -0,0 +1,13 @@
+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+
+RUN npm install
+
+COPY . .
+
+EXPOSE 3003
+
+CMD ["npm", "start"]

api-gateway/index.js

@@ -0,0 +1,46 @@
+import express from "express";
+import "dotenv/config";
+import { userProxy } from "./proxy/userProxy.js";
+import { questionProxy } from "./proxy/questionProxy.js";
+import { verifyAccessToken } from "./middleware/authentication.js";
+import cors from "cors";
+import { authRouter } from "./router/authRouter.js";
+import { codeExecutionProxy } from "./proxy/codeExecutionProxy.js";
+
+export const QUESTION_SERVICE =
+    process.env.QUESTION_SERVICE_URL || "http://localhost:3002";
+
+export const app = express();
+
+app.use(cors());
+app.use(express.json());
+
+// To handle CORS Errors
+app.use((req, res, next) => {
+    res.header("Access-Control-Allow-Origin", "*");
+
+    res.header(
+        "Access-Control-Allow-Headers",
+        "Origin, X-Requested-With, Content-Type, Accept, Authorization"
+    );
+
+    // Browsers usually send this before PUT or POST Requests
+    if (req.method === "OPTIONS") {
+        res.header(
+            "Access-Control-Allow-Methods",
+            "GET, POST, DELETE, PUT, PATCH"
+        );
+        return res.status(200).json({});
+    }
+
+    next();
+});
+
+app.use("/auth", authRouter);
+app.use("/question", verifyAccessToken, questionProxy);
+app.use("/user", userProxy)
+app.use("/code-execution", verifyAccessToken, codeExecutionProxy)
+
+app.listen(3210, () => {
+    console.log("Backend listening on port 3003");
+});

api-gateway/middleware/authentication.js

@@ -0,0 +1,38 @@
+import axios from 'axios';
+import { USER_SERVICE } from '../proxy/userProxy.js';
+
+export async function verifyAccessToken(req, res, next) {
+    try {
+        console.log('Verify: Request headers:', req.headers);
+
+        // Save the original headers and body
+        const originalHeaders = { ...req.headers };
+        const originalBody = req.body;
+
+        // Modify headers specifically for this request
+        const headers = { ...originalHeaders, 'Content-Length': '0' };
+
+        // Perform the GET request with modified headers
+        const response = await axios.get(`${USER_SERVICE}/auth/verify-token`, {
+            headers: headers
+        });
+
+        // Restore the original headers and body for the next middleware
+        req.headers = originalHeaders;
+        req.body = originalBody;
+
+        // Attach user data to req for the next middleware
+        req.user = response.data;
+
+        console.log('Authentication successful:', {
+            userId: response.data?.id,
+            method: req.method,
+            path: req.path
+        });
+
+        next();
+    } catch(err) {
+        console.error("API Gateway -> Error verifying access token ", err.response?.data || err.message);
+        res.status(403).json({ message: "Invalid user"});
+    }
+}