AI Implementation feature(820): Project Scaffold and Platform Foundations (#1)

backend/src/frontend/uploads-static.middleware.ts

@@ -0,0 +1,22 @@
+import { Injectable, NestMiddleware } from '@nestjs/common';
+import { Request, Response, NextFunction } from 'express';
+import * as fs from 'fs';
+import * as path from 'path';
+import { ConfigService } from '@nestjs/config';
+
+@Injectable()
+export class UploadsStaticMiddleware implements NestMiddleware {
+  private rootDir = '/tmp';
+
+  constructor(config: ConfigService) {
+    const dir = path.resolve(config.get<string>('UPLOAD_DIR', '/data/hipctf/uploads'));
+    if (!fs.existsSync(dir)) fs.mkdirSync(dir, { recursive: true });
+    this.rootDir = dir;
+  }
+
+  use(req: Request, res: Response, next: NextFunction): void {
+    if (!req.path.startsWith('/uploads')) return next();
+    const express = require('express');
+    return express.static(this.rootDir)(req, res, next);
+  }
+}