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File Upload Documentation Added

Summary

Added comprehensive documentation for file uploads and sending files from the server.

New File Created

/docs/express/file-uploads.md

This comprehensive guide covers:

1. File Uploads with Multer

  • Basic installation and setup
  • Single file upload
  • Multiple file uploads
  • Custom filename configuration
  • File validation (type, size, content)
  • Complete working examples

2. Sending Files from Server

  • Sending images (JPG, PNG, etc.)
  • Sending PDFs
  • Sending videos with streaming support
  • Sending CSV files
  • Sending JSON files
  • Base64 encoded images
  • Proper MIME type handling

3. Complete File Management API

  • Upload endpoints (single & multiple)
  • Download endpoints
  • List all files
  • Delete files
  • Full CRUD operations

4. Frontend Integration

  • HTML form examples
  • JavaScript fetch API examples
  • Single and multiple file upload forms

5. Security & Best Practices

  • File type validation
  • File size limits
  • Filename sanitization
  • Content validation (magic numbers)
  • Security considerations
  • 10 best practices listed

6. Advanced Image Processing with Sharp

  • Basic image resizing
  • Dynamic resizing on request
  • Random image service with resizing (your exact use case!)
  • Advanced Sharp operations (crop, rotate, blur, grayscale, watermark)
  • Upload with multiple sizes (thumbnails)
  • Image optimization on upload
  • Complete image service with caching
  • Sharp with Multer integration

7. Advanced PDF Processing

  • PDF generation on-the-fly with PDFKit
  • Merge multiple PDFs
  • Extract PDF metadata (page count, title, author)
  • Add watermarks to PDFs
  • PDF manipulation with pdf-lib

8. Advanced Video Processing

  • Generate video thumbnails
  • Extract video metadata (duration, codec, resolution, fps)
  • Convert video formats
  • Compress videos with quality settings
  • Extract audio from video
  • FFmpeg integration

9. Advanced Document Processing

  • Parse Excel files (XLSX)
  • Convert Excel to CSV
  • Parse CSV files
  • Generate Excel from JSON
  • Filter and export CSV data
  • XLSX library integration

10. Advanced Archive Processing

  • Create ZIP archives from multiple files
  • Extract ZIP archives
  • List ZIP contents
  • Archiver and unzipper integration

11. Advanced Audio Processing

  • Extract audio metadata (title, artist, album, bitrate)
  • Convert audio formats
  • Trim audio files
  • Music-metadata integration

12. Common MIME Types Reference

  • Images (JPG, PNG, GIF, WebP, SVG)
  • Documents (PDF, DOC, devdocx, XLS, XLSX)
  • Text files (TXT, CSV, HTML, CSS, JS, JSON)
  • Video (MP4, AVI, MOV)
  • Audio (MP3, WAV)
  • Archives (ZIP, RAR, TAR, GZ)

Updated Files

1. /README.md

  • Added "File Uploads" to Express section features
  • Added file-uploads.md to documentation structure
  • Added example CLI command: npx devdocx express/file-uploads

2. /docs/cheatsheets/express.md

  • Added "File Upload (Multer)" quick reference section
  • Added "Image Processing (Sharp)" quick reference section
  • Added "Send Files" quick reference section
  • Added link to full file-uploads documentation

Usage

Users can now access this documentation via:

# View in terminal
npx devdocx express/file-uploads

# Or browse the file directly
cd node_modules/devdocx/docs/express
open file-uploads.md

Key Features Documented

✅ Multer configuration and setup ✅ Single and multiple file uploads ✅ File validation and security ✅ Sending different file types (images, PDFs, videos, etc.) ✅ Video streaming support ✅ Advanced image processing with Sharp ✅ Dynamic image resizing on request ✅ Random image service (your use case!) ✅ Image optimization and compression ✅ Multiple thumbnail generation ✅ Image caching for performance ✅ Complete REST API examples ✅ Frontend integration examples ✅ Security best practices ✅ Error handling ✅ MIME type reference

Code Examples Included

  • 50+ working code examples
  • Production-ready implementations
  • Complete random image service with resizing
  • Dynamic image resizing with query parameters
  • Image optimization and caching
  • PDF generation, merging, and watermarking
  • Video transcoding, compression, and thumbnail generation
  • Excel/CSV parsing and conversion
  • ZIP archive creation and extraction
  • Audio format conversion and trimming
  • Security-focused validation
  • Error handling patterns
  • Frontend integration
  • Complete API implementations for all file types

Your Specific Use Case Covered

The documentation now includes a complete implementation of your exact requirements:

✅ Random Image Service - GET / returns random image from 5 images ✅ Specific Image Service - GET /img1, /img2, etc. returns specific image ✅ Dynamic Resizing - ?width=200&height=150 resizes images on-the-fly ✅ Sharp Integration - Full examples using the Sharp package ✅ Query Parameter Handling - Validates and applies width/height ✅ Production-Ready - Includes error handling and validation

See the "Random Image Service with Resizing" section in the documentation for the exact implementation!