javier
cdded06ba3
This PR contains the work done to rename the _Web_ package as _Infrastructure_, to provide a clear naming and purpose to this particular package within the project. To provide further details about the work: * Infrastructure * Asset fingerprinting: an FNV-1a token derived from the static files directory, appended as ?v= to asset URLs so deploys bust caches; pre-rendered pages also revalidate via weak ETags. * New middlewares: fixed-window RateLimitMiddleware (per-client budgets keyed by trusted X-Forwarded-For or remote address) and VaryMiddleware (Accept-Encoding on every response); SecurityHeadersMiddleware now also stamps error responses. * Auto-generated HEAD endpoints, cache max-age configuration, and Docker build/Compose refinements. * Protocols and scaffolding: Asset/AssetExtension, the Page protocol (viewport, stylesheets, scripts, versioned URLs), and LocalizedRequestContext. * Rate limiter's counter store swapped from an actor to a Mutex (no executor hop per request) with amortized batch eviction instead of O(n²) scans under client floods. * FingerprintAssets reports unreadable files to a logger instead of silently producing a token that never busts their cache. Reviewed-on: rock-n-code/loud-amsterdam#25 Co-authored-by: Javier Cicchelli <javier@rock-n-code.com> Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>
75 lines
2.5 KiB
Swift
75 lines
2.5 KiB
Swift
import Elementary
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import Foundation
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import Hummingbird
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/// Serves a custom error page for requests that match neither a route nor a static file.
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///
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/// Placed ahead of `FileMiddleware` in the middleware chain, it catches the `.notFound` error that bubbles up when no file exists for the requested
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/// path and responds with the rendered error page and a `404 Not Found` status. The page is served in the language stored on the context by
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/// ``LocalizationMiddleware``, falling back to the default language.
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public struct NotFoundMiddleware<Context: LocalizedRequestContext> {
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// MARK: Properties
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/// The error page, rendered once per supported language and reused for every not-found response.
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private let responses: LocalizedHTMLCollectionResponse
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// MARK: Initializers
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/// Creates a not-found middleware.
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/// - Parameters:
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/// - bundle: the bundle whose String Catalog names the languages the page is rendered for.
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/// - document: builds the error page to render for a given locale.
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public init<Document: HTMLDocument>(
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bundle: Bundle,
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document: (Locale) -> Document
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) {
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self.responses = .init(
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bundle: bundle,
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status: .notFound,
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document: document
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)
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}
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}
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// MARK: - RouterMiddleware
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extension NotFoundMiddleware: RouterMiddleware {
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// MARK: Functions
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/// Passes the request down the chain, rendering the error page if it results in a not-found response.
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///
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/// Any error other than `.notFound` is rethrown unchanged.
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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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/// - next: the next responder in the middleware chain.
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/// - Returns: the downstream response, or the rendered error page with a `404 Not Found` status.
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/// - Throws: any non-not-found error thrown downstream.
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public func handle(
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_ request: Request,
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context: Context,
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next: (Request, Context) async throws -> Response
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) async throws -> Response {
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do {
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return try await next(request, context)
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}
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catch let error {
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guard
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let responseError = error as? any HTTPResponseError,
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responseError.status == .notFound
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else {
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throw error
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}
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return responses.response(
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for: context.language,
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request: request
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)
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}
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}
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}
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