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7 guides
Coldwast wrote
Jul 18, 2026 in Programming, Web, Performance - A CDN caches your static content on servers spread around the world so visitors get it from a nearby machine. How the edge, cache hit and miss, TTL and invalidation work, static vs dynamic, and where a CDN fits with your host.
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Jun 26, 2026 in Programming, Web, Networking - A WebSocket keeps one connection open so the server and browser can send messages to each other at any time. What a WebSocket is, how it differs from HTTP, the handshake, ws vs wss, and when to use it instead of polling.
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Jun 18, 2026 in Programming, Web, APIs - REST uses HTTP + JSON (human-readable, universal); gRPC uses HTTP/2 + Protocol Buffers (fast, typed, streaming) for service-to-service calls. Performance, streaming, browser support, and when to pick each.
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Jun 17, 2026 in Programming, Web, APIs - REST and GraphQL are two ways to build a web API: REST uses many endpoints with fixed responses; GraphQL uses one endpoint where the client asks for exactly the fields it needs. Over/under-fetching, caching, and when to choose each.
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Jun 17, 2026 in Programming, Web, Concepts - A webhook is an automated HTTP request a service sends you when an event happens - the reverse of an API call you make. How webhooks differ from polling an API, how to receive one safely, and real examples (Stripe, GitHub, Slack).
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Jun 14, 2026 in Programming, Web, Data - JSON is a lightweight, human-readable text format for structured data - the language most web APIs and config files speak. Its syntax, why it is everywhere, how it compares to XML, and its honest limits.
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Jun 14, 2026 in Programming, Web, Concepts - An API is a contract that lets one piece of software talk to another. The main kinds (web/REST, library, OS), how a web request and response work, and why APIs are everywhere in modern software.
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