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fix(server): add Cache-Control headers to static assets #27934

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fix(server): add Cache-Control headers to static assets #27934

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11 changes: 10 additions & 1 deletion packages/opencode/src/server/shared/ui.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -52,9 +52,18 @@ function notFound() {
return HttpServerResponse.jsonUnsafe({ error: "Not Found" }, { status: 404 })
}

// Vite content-hashed filenames contain a hash segment (e.g. index-abc123.js)
const HASHED_ASSET_REGEX = /[-.][\da-f]{8,}\.\w+$/

function cacheControl(file: string) {
if (AppFileSystem.mimeType(file).startsWith("text/html")) return "no-cache"
if (HASHED_ASSET_REGEX.test(file)) return "public, max-age=31536000, immutable"
return "public, max-age=3600"
}

function embeddedUIResponse(file: string, body: Uint8Array) {
const mime = AppFileSystem.mimeType(file)
const headers = new Headers({ "content-type": mime })
const headers = new Headers({ "content-type": mime, "cache-control": cacheControl(file) })
if (mime.startsWith("text/html")) {
headers.set("content-security-policy", cspForHtml(new TextDecoder().decode(body)))
}
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