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Snippet Library.

Implement Secure Server-Side File Uploads with Multer

Securely handle file uploads on the server in Node.js using Multer by implementing crucial validations for file types, sizes, and storing files safely outside the web root.

Implement Server-Side API Rate Limiting to Prevent Abuse

Learn to implement server-side API rate limiting in an Express.js application using `express-rate-limit` to protect against brute-force attacks and service abuse.

Automating Timestamped Directory Backups

Learn how to create an automated bash script to back up a specified directory with a unique timestamp, ideal for web project deployments or configuration management.

Checking if a Network Port is Open and Listening

Discover a concise bash snippet to verify if a specific TCP port is active and listening on your server, useful for debugging network services or pre-deployment checks.

Recursively Find and Replace Text in Files

Implement a powerful bash command to recursively search and replace text strings across multiple files within a directory, perfect for batch code updates or configuration changes.

Extracting Specific Data from Log Files

Master how to parse and extract specific information like IP addresses, request paths, or status codes from log files using powerful bash commands for quick analysis.

Managing Environment Variables for Deployments

Learn to set and manage application-specific environment variables using a bash script, ensuring consistent configurations across different deployment environments.

Graceful API Rate Limit Handling with Exponential Backoff

Implement robust API rate limit management in JavaScript using exponential backoff and `Retry-After` headers for reliable integration and fewer failed requests.

Implementing OAuth 2.0 PKCE Flow for SPAs

Securely integrate OAuth 2.0 with PKCE (Proof Key for Code Exchange) in your Single-Page Application to authorize users without exposing client secrets.

Secure Webhook Signature Verification in Node.js

Ensure webhook integrity and authenticity in your Node.js backend by verifying incoming signatures using HMAC, preventing unauthorized data processing.

Client-Side API Response Caching with IndexedDB

Enhance web application performance and offline capabilities by caching API responses securely and persistently using the browser's IndexedDB.

Server-Side Aggregation of Multiple External APIs

Combine and aggregate data from various external APIs on your Node.js backend to create a unified endpoint, simplifying frontend consumption and reducing requests.