javier
847058d642
This PR contains the work done to provide optimizations to the current service, such as a health-check endpoint, pre-renders static HTML pages, and hardens the error page's CSP. To provide further details about the work: * Added the `HealthController` controller serving GET `/health` with a static JSON payload. * Added the `CachedHTMLResponse` response, which renders a static HTMLDocument to bytes once and reuses them per request (no Content-Length, so responses stay compressible). * Integrated the response into the `RootController` and the `NotFoundMiddleware` middleware to avoid re-rendering on hot paths. * Added a `RouterMethods.addRoutes(_:)` extension and switched the router in App+build to use it. * Moved the inline style from the `ErrorPage` page into a dedicated style file so the CSP needs no inline-style escape hatch. * Fixed the `IndexPage` page path inconsistencies. * Written the `README` file. Reviewed-on: rock-n-code/loud-amsterdam#9 Co-authored-by: Javier Cicchelli <javier@rock-n-code.com> Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>
84 lines
2.2 KiB
Swift
84 lines
2.2 KiB
Swift
import Hummingbird
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import NIOCore
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/// Serves the website's health-check route.
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///
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/// The controller exposes its routes as a `RouteCollection` so they can be added to a router
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/// (or a sub-group) by the application that composes it:
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///
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/// ```swift
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/// router.addRoutes(HealthController<AppRequestContext>().routes)
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/// ```
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///
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/// - Note: `Context` is the request context the routes are resolved against, and must match the
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/// context of the router the routes are added to.
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public struct HealthController<Context: RequestContext>: Sendable {
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// MARK: Properties
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/// The JSON payload returned for every health check.
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private let payload: String
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// MARK: Initializers
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/// Creates a health controller.
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public init() {
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self.payload = #"{"status":"ok"}"#
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}
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// MARK: Computed
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/// The routes served by the controller.
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///
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/// Serves a `GET` request for the health path (`/health`) with a static JSON status payload.
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public var routes: RouteCollection<Context> {
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let routes = RouteCollection(context: Context.self)
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routes.get(
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.Health.check,
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use: check
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)
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return routes
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}
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}
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// MARK: - Helpers
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private extension HealthController {
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// MARK: Methods
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/// Handles a request for the health check.
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///
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/// Returns a constant JSON body built directly per request — the payload is a tiny literal with no
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/// rendering step, so there is nothing to pre-render or cache.
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/// - Parameters:
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/// - request: the incoming request.
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/// - context: the context the request is resolved against.
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/// - Returns: a `200 OK` response carrying the static JSON status payload.
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@Sendable
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func check(
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request: Request,
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context: some RequestContext
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) -> Response {
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Response(
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status: .ok,
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headers: [.contentType: "application/json"],
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body: .init(byteBuffer: .init(string: payload))
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)
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}
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}
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// MARK: - Constants
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private extension RouterPath {
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/// A namespace for the ``HealthController`` route paths.
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enum Health {
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/// The path of the health-check endpoint.
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static let check: RouterPath = "/health"
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}
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}
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