Upload Middleware

Overview

This middleware configures file uploads for complaint-related images using multer. It handles image filtering, naming, and storage location. The uploaded files are saved to a designated directory with size and type restrictions.

Dependencies

import multer, { diskStorage } from 'multer';
import { join, extname } from 'path';
import { existsSync, mkdirSync } from 'fs';

Configuration Details

Upload Directory

Path: - Files are saved in files_folder/complaints_upload/ relative to the project root.

Creation Logic: - If the directory does not exist, it is created recursively.

const uploadDir = join(__dirname, '/../files_folder/complaints_upload/');

Storage Engine

diskStorage

destination: - Dynamically checks and creates the upload directory before storing files.

filename: - Generates a unique filename using the current timestamp and original file name (with spaces replaced by underscores).

filename: (req, file, cb) => {
  const timestamp = Date.now();
  const originalName = file.originalname.replace(/\s+/g, '_');
  cb(null, `${timestamp}_${originalName}`);
}

File Filter

Allowed Types: - image/jpeg - image/png - image/jpg

Validation: - Rejects files that do not match allowed MIME types with an error message: 'Only image files are allowed!'

Upload Limits

Size Limit:

• Files are limited to a maximum size of 2MB.

limits: {
  fileSize: 2 * 1024 * 1024 // 2MB
}

Export

The configured upload middleware is exported as the default module:

export default upload;

Usage Example

```javascript import upload from './middlewares/upload.js';

router.post('/upload', upload.single('image'), (req, res) => { res.send('File uploaded successfully'); });`