Handling File Uploads in Express with Multer

Short summary

Multer middleware simplifies file uploads in Express by parsing HTTP multipart streams. The tutorial covers multipart/form-data protocol fundamentals, disk storage configuration with timestamp-based unique filenames, and implementing single versus multiple file upload endpoints. Includes practical code examples for diskStorage setup and handling req.file versus req.files in route handlers.

• •Multer parses multipart streams and writes files to disk as middleware
• •Use diskStorage() with custom naming to prevent file collisions
• •Single uploads via upload.single() or multiple via upload.array()

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