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>
73 lines
2.6 KiB
Swift
73 lines
2.6 KiB
Swift
import Elementary
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import HTTPTypes
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import Hummingbird
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import NIOCore
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/// A pre-rendered HTTP response for a fully static HTML page.
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///
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/// The document is rendered to bytes once, at initialization, and every ``response()`` reuses those
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/// bytes — along with a fixed status and precomputed headers — instead of re-rendering. This suits
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/// pages whose markup never changes between requests, such as the landing page and the not-found
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/// page, avoiding a per-request Elementary render on hot paths.
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///
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/// ``LocalizedHTMLResponses`` builds on this type, caching one instance per supported language.
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///
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/// The body is written as an unsized stream (no `Content-Length`), mirroring `HTMLResponse`, so the
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/// response-compression middleware downstream treats it exactly as it would a freshly rendered page.
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struct CachedHTMLResponse: Sendable {
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// MARK: Properties
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/// The page rendered to bytes once.
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private let buffer: ByteBuffer
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/// The headers applied to every response, precomputed once.
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private let headers: HTTPFields
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/// The status applied to every response.
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private let status: HTTPResponse.Status
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// MARK: Initializers
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/// Renders the given document to bytes once.
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/// - Parameters:
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/// - status: the status applied to every response. Defaults to `.ok`.
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/// - additionalHeaders: extra headers merged onto every response, alongside the content type.
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/// Used to carry per-language signals such as `Content-Language` and `Vary`.
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/// - document: the static HTML document to render and cache.
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init(
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status: HTTPResponse.Status = .ok,
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additionalHeaders: HTTPFields = [:],
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document: some HTMLDocument
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) {
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var headers: HTTPFields = [
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.contentType: "text/html; charset=utf-8"
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]
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for field in additionalHeaders {
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headers[field.name] = field.value
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}
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self.status = status
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self.headers = headers
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self.buffer = .init(string: document.render())
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}
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// MARK: Methods
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/// Builds a response from the cached, pre-rendered bytes.
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///
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/// Mirrors the `text/html; charset=utf-8` content type `HTMLResponse` produces, and leaves the
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/// `Content-Length` unset so small pages remain eligible for compression.
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/// - Returns: the response carrying the cached HTML body.
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func response() -> Response {
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Response(
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status: status,
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headers: headers,
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body: .init { [buffer] writer in
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try await writer.write(buffer)
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try await writer.finish(nil)
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}
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)
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}
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}
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