javier
6c66ea74cc
This PR contains the work done to introduce server-side localization support to the **Website** service so the landing and error pages are served in the visitor's negotiated language, backed by a new reusable Localization package. To provide further details about the work: * Created the _Localization_ package — a bundle-bound `Localize` method and a `LanguageList` type. * Language negotiation — `NegotiateLanguage` method picks the best supported language from the request's _Accept-Language_ header (falling back to the default); the `LocalizationMiddleware` middleware resolves it per request and stores it on a new `LocalizedRequestContext` / `WebsiteRequestContext` context. * Localized responses — `LocalizedHTMLCollectionResponse` pre-renders each page once per language and caches the bytes (with `Content-Language` + `Vary: Accept-Language`), reused by the `RootController` controller and `NotFoundMiddleware` middleware. * The `CachedHTMLResponse` response gained custom-header support. * Localized pages — the `IndexPage` and `ErrorPage` pages now resolve their strings via `Localize` method; * Added `Localizable.xcstrings` catalogs. * Wired the `LocalizationMiddleware` middlewaer into the router. Reviewed-on: rock-n-code/loud-amsterdam#10 Co-authored-by: Javier Cicchelli <javier@rock-n-code.com> Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>
68 lines
2.1 KiB
Swift
68 lines
2.1 KiB
Swift
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
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/// that bubbles up when no file exists for the requested path and responds with the rendered
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/// ``ErrorPage`` and a `404 Not Found` status. The page is served in the language stored on the
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/// context by ``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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public init() {
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self.responses = .init(
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status: .notFound
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) {
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ErrorPage(locale: $0)
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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
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/// 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 ``ErrorPage`` 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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)
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}
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}
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}
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