Client

WCF Certificates

How X.509 certificates are configured, stored, and used in WCF for service authentication, client authentication, and message encryption.

Certificate and Proxy Settings

Learn how to configure client-side TLS certificates, manage CA certificate verification, and route Postman traffic through a proxy for corporate networks or tr…

spark-submit and Deployment

Master the spark-submit command-line tool and the client vs. cluster deployment modes for running Spark applications.

Building an OAuth Client

A step-by-step walkthrough of implementing the OAuth 2.0 authorization code flow with PKCE from registration through token exchange.

Securing Token Endpoints

Hardening the OAuth token endpoint with strong client authentication, brute-force resistance, refresh token rotation, and sender-constrained tokens.

The Client Credentials Grant

The Client Credentials grant lets a service authenticate as itself, without any user in the loop, making it the standard choice for machine-to-machine and back…

Connecting a Client

How to connect a browser or Node.js client to a Socket.IO server, configure connection options, and handle the connection lifecycle correctly.

GenServer Explained

Understand how GenServer standardizes stateful server processes in Elixir with a clean client/callback API.

The WebSocket Handshake

A step-by-step look at how a WebSocket connection is established, from the initial HTTP Upgrade request to the server's 101 Switching Protocols response.

Kafka with a Programming Language Client

How to produce and consume Kafka messages from application code using official and community client libraries in Python, Java, Go, and Node.js.

Client Streaming RPC

A gRPC pattern where the client sends a sequence of messages over one stream and the server replies with a single response once the client finishes.

Implementing a gRPC Client

Learn how to establish a gRPC channel, call unary and streaming methods with a generated stub, and configure retries and load balancing for production use.

Server Components vs Client Components

Learn how React Server Components and Client Components split rendering work in the Next.js App Router, and when the 'use client' directive is actually needed.

The Link Component and Navigation

Learn how Next.js's Link component powers fast, client-side navigation with automatic prefetching, and how to complement it with the useRouter and usePathname…

Apollo Client Basics

Learn how Apollo Client manages GraphQL queries, mutations, and the normalized cache in front-end applications.

Client-Server Architecture

The foundational model where clients request resources or services from centralized servers, including its variations, benefits, and inherent limitations at sc…

WebSockets Cheat Sheet

Quick reference for opening, sending, and closing full-duplex WebSocket connections between browser and server, including lifecycle events and reconnection.

Web Sockets vs Server-Sent Events Cheat Sheet

Compares WebSocket and Server-Sent Events with working code for both, plus guidance on which real-time approach fits your use case.