{"id":15218,"date":"2026-10-01T03:37:44","date_gmt":"2026-10-01T03:37:44","guid":{"rendered":"https:\/\/playgama.com\/blog\/?p=15218"},"modified":"2026-10-01T03:37:44","modified_gmt":"2026-10-01T03:37:44","slug":"how-to-configure-http-cache-headers-and-content-hashing-for","status":"publish","type":"post","link":"https:\/\/playgama.com\/blog\/business-faqs\/how-to-configure-http-cache-headers-and-content-hashing-for\/","title":{"rendered":"How to configure HTTP cache headers and content hashing for browser games?"},"content":{"rendered":"

Fingerprint every build file (JS, WASM, data, audio) with a content hash in its filename, serve those hashed files with a long, immutable cache lifetime, and serve the entry HTML (and any manifest that points at the hashed files) with no-cache so players always get the latest pointer to the newest build.<\/strong><\/p>\n

At a glance<\/h2>\n\n\n\n\n\n\n\n
Fact<\/th>\nValue<\/th>\nSource<\/th>\n<\/tr>\n<\/thead>\n
Hashed files get long max-age<\/td>\nimmutable cache<\/td>\ndeveloper.mozilla.org<\/a><\/td>\n<\/tr>\n
Entry HTML must revalidate<\/td>\nno-cache header<\/td>\ndeveloper.mozilla.org<\/a><\/td>\n<\/tr>\n
Engines exporting to web<\/td>\nUnity, Godot, Construct 3, Defold<\/td>\ndeveloper.mozilla.org<\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Split your build into two cache classes. Every file that gets a unique, content-derived filename on each build (bundle.a1b2c3.js, main.wasm, data.d4e5f6.pck, sprites.9f8e.png) should carry a long, immutable cache header, because the browser only ever fetches a given filename once and a new build produces a new filename. The entry point – index.html and any JSON manifest that lists the current hashed filenames – must be served with no-cache (or a very short max-age) so returning players always pick up the newest set of hashes instead of an old cached HTML pointing at deleted files.<\/p>\n

Most engines that export to the web (Unity WebGL, Godot’s HTML5 export, Construct 3, GameMaker, Cocos Creator) generate hashed or versioned output filenames as part of the build step; check your engine’s web export settings rather than hand-rolling hashing. If you build your web game using an AI coding agent like Claude Code or Cursor, the Playgama MCP server allows the agent to upload builds, configure settings, and publish a playable sandbox test link directly.<\/p>\n

What actually breaks in practice<\/h2>\n