{"version":3,"file":"ssr-server.cjs","names":[],"sources":["../../../src/ssr/ssr-server.ts"],"sourcesContent":["import { crossSerializeStream } from 'seroval'\nimport { invariant } from '../invariant'\nimport {\n createInlineCssPlaceholderAsset,\n createInlineCssStyleAsset,\n getStylesheetHref,\n} from '../manifest'\nimport { decodePath } from '../utils'\nimport { createSieveCache } from '../sieve-cache'\nimport { rootRouteId } from '../root'\nimport { _getRenderedMatches } from '../load-client'\nimport { waitForReason } from '../await-signal'\nimport {\n SSR_SERIALIZATION_SCOPE_ID,\n createHydrationScripts,\n} from './hydrationScripts'\nimport { dehydrateSsrMatchId } from './ssr-match-id'\nimport { ssrSerovalPlugins } from './serializer/seroval-plugins.ssr'\nimport { makeSsrSerovalPlugin } from './serializer/makeSsrSerovalPlugin'\nimport type { SieveCache } from '../sieve-cache'\nimport type { DehydratedMatch, DehydratedRouter } from './types'\nimport type { AnyRouter, ServerSsr } from '../router'\nimport type { AnyRouteMatch } from '../Matches'\nimport type {\n Manifest,\n ManifestRoute,\n ManifestRouteAssets,\n ServerManifest,\n} from '../manifest'\n\ntype DehydrationPhase = 'idle' | 'started' | 'disabled'\n\nexport function dehydrateMatch(match: AnyRouteMatch): DehydratedMatch {\n const dehydratedMatch: DehydratedMatch = {\n i: dehydrateSsrMatchId(match.id),\n u: match.updatedAt,\n s: match.status,\n }\n\n const properties = [\n ['__beforeLoadContext', 'b'],\n ['loaderData', 'l'],\n ['error', 'e'],\n ['ssr', 'ssr'],\n ] as const\n\n for (const [key, shorthand] of properties) {\n if (match[key] !== undefined) {\n dehydratedMatch[shorthand] = match[key]\n }\n }\n if (match._notFound) {\n dehydratedMatch.g = true\n }\n return dehydratedMatch\n}\n\nfunction disposeSerializationSafely(dispose?: () => void) {\n try {\n dispose?.()\n } catch (err) {\n console.error('Error disposing SSR serialization:', err)\n }\n}\n\nfunction notifyAndClearListeners(\n listeners: Array<(arg: T) => void>,\n errorMessage: string,\n arg: T,\n) {\n const pending = listeners.slice()\n listeners.length = 0\n for (const listener of pending) {\n try {\n listener(arg)\n } catch (error) {\n console.error(errorMessage, error)\n }\n }\n}\n\nconst isProd = process.env.NODE_ENV === 'production'\n\ntype FilteredRoutes = Manifest['routes']\n\ntype PreparedMatchedManifestRoutes = {\n routes: FilteredRoutes\n hasStrippedRoutes: boolean\n inlineCssHrefs?: Array\n}\n\ntype ManifestCache = SieveCache\n\nconst MANIFEST_CACHE_SIZE = 100\nconst manifestCaches = new WeakMap()\n\nfunction getManifestCache(manifest: ServerManifest): ManifestCache {\n const cache = manifestCaches.get(manifest)\n if (cache) {\n return cache\n }\n const newCache = createSieveCache(\n MANIFEST_CACHE_SIZE,\n )\n manifestCaches.set(manifest, newCache)\n return newCache\n}\n\nfunction getInlineCssForPreparedRoutes(\n manifest: ServerManifest,\n preparedRoutes: PreparedMatchedManifestRoutes,\n) {\n const styles = manifest.inlineCss?.styles\n const hrefs = preparedRoutes.inlineCssHrefs\n if (!styles || !hrefs?.length) {\n return undefined\n }\n\n // Joined once per matched route set and request. Retaining the joined copy\n // on the module cache entry would permanently duplicate shared CSS across\n // up to MANIFEST_CACHE_SIZE route combinations.\n let css = ''\n for (const href of hrefs) {\n css += styles[href]!\n }\n\n return css\n}\n\nfunction getInlineCssAssetForPreparedRoutes(\n manifest: ServerManifest,\n preparedRoutes: PreparedMatchedManifestRoutes,\n) {\n const css = getInlineCssForPreparedRoutes(manifest, preparedRoutes)\n\n return css === undefined ? undefined : createInlineCssStyleAsset(css)\n}\n\nfunction getMatchedRoutesCacheKey(matches: Array) {\n let cacheKey = ''\n for (let i = 0; i < matches.length; i++) {\n cacheKey += (i === 0 ? '' : '\\0') + matches[i]!.routeId\n }\n return cacheKey\n}\n\nfunction getPreparedMatchedManifestRoutes(\n manifest: ServerManifest,\n matches: Array,\n cacheKey: string,\n) {\n if (isProd) {\n const cached = getManifestCache(manifest).get(cacheKey)\n if (cached) {\n return cached\n }\n }\n\n const preparedRoutes = prepareMatchedManifestRoutes(manifest, matches)\n\n if (isProd) {\n getManifestCache(manifest).set(cacheKey, preparedRoutes)\n }\n\n return preparedRoutes\n}\n\nfunction prepareMatchedManifestRoutes(\n manifest: ServerManifest,\n matches: Array,\n): PreparedMatchedManifestRoutes {\n const inlineStyles = manifest.inlineCss?.styles\n const routes: FilteredRoutes = {}\n\n if (!inlineStyles) {\n for (const match of matches) {\n const route = manifest.routes[match.routeId]\n if (route) {\n routes[match.routeId] = route\n }\n }\n return { routes, hasStrippedRoutes: false }\n }\n\n const inlineCssHrefs: Array = []\n const seenInlineCssHrefs = new Set()\n let hasStrippedRoutes = false\n\n for (const match of matches) {\n const routeId = match.routeId\n const route = manifest.routes[routeId]\n if (!route) {\n continue\n }\n\n const nextRoute = stripInlinedStylesheetAssetsFromRoute(\n inlineStyles,\n route,\n inlineCssHrefs,\n seenInlineCssHrefs,\n )\n\n if (nextRoute !== route) {\n hasStrippedRoutes = true\n }\n routes[routeId] = nextRoute\n }\n\n return {\n routes,\n hasStrippedRoutes,\n ...(inlineCssHrefs.length ? { inlineCssHrefs } : {}),\n }\n}\n\nfunction stripInlinedStylesheetAssetsFromRoute(\n inlineStyles: Record,\n route: ManifestRoute,\n inlineCssHrefs: Array,\n seenInlineCssHrefs: Set,\n): ManifestRoute {\n const css = route.css\n if (!css) {\n return route\n }\n\n if (css.length === 0) {\n const nextRoute = { ...route }\n delete nextRoute.css\n return nextRoute\n }\n\n let cssLinks: typeof css | undefined\n for (let i = 0; i < css.length; i++) {\n const link = css[i]!\n const href = getStylesheetHref(link)\n if (inlineStyles[href] === undefined) {\n if (cssLinks) {\n cssLinks.push(link)\n }\n continue\n }\n\n if (!seenInlineCssHrefs.has(href)) {\n seenInlineCssHrefs.add(href)\n inlineCssHrefs.push(href)\n }\n\n if (!cssLinks) {\n cssLinks = css.slice(0, i)\n }\n }\n\n if (!cssLinks) {\n return route\n }\n\n if (cssLinks.length > 0) {\n return { ...route, css: cssLinks }\n }\n\n const nextRoute = { ...route }\n delete nextRoute.css\n return nextRoute\n}\n\nfunction hasRouteAssets(route: ManifestRoute) {\n return !!route.scripts?.length || !!route.css?.length\n}\n\nfunction hasRequestAssets(assets: ManifestRouteAssets | undefined) {\n return !!assets && (!!assets.preloads?.length || hasRouteAssets(assets))\n}\n\nfunction mergeRequestAssetsIntoRootRoute(\n rootRoute: ManifestRoute | undefined,\n requestAssets: ManifestRouteAssets | undefined,\n): ManifestRoute {\n const preloads = requestAssets?.preloads?.length\n ? [...requestAssets.preloads, ...(rootRoute?.preloads ?? [])]\n : rootRoute?.preloads\n const scripts = requestAssets?.scripts?.length\n ? [...requestAssets.scripts, ...(rootRoute?.scripts ?? [])]\n : rootRoute?.scripts\n const cssLinks = requestAssets?.css?.length\n ? [...requestAssets.css, ...(rootRoute?.css ?? [])]\n : rootRoute?.css\n\n return {\n ...(rootRoute ?? {}),\n ...(preloads?.length ? { preloads } : {}),\n ...(scripts?.length ? { scripts } : {}),\n ...(cssLinks?.length ? { css: cssLinks } : {}),\n }\n}\n\n/**\n * Compose a client-facing manifest from prepared routes, an optional inline\n * style, and optional request-scoped assets merged into the root route.\n * Shared by the `router.ssr.manifest` getter and `dehydrate()` so the two\n * compositions cannot drift.\n */\nfunction composeManifest(\n scriptFormat: ServerManifest['scriptFormat'],\n inlineStyle: Manifest['inlineStyle'],\n routes: FilteredRoutes,\n requestAssets: ManifestRouteAssets | undefined,\n): Manifest {\n const base: Manifest = {\n ...(scriptFormat ? { scriptFormat } : {}),\n ...(inlineStyle ? { inlineStyle } : {}),\n routes,\n }\n if (!hasRequestAssets(requestAssets)) {\n return base\n }\n // Merge request-scoped assets into the root route without mutating any\n // cached route map.\n return {\n ...base,\n routes: {\n ...routes,\n [rootRouteId]: mergeRequestAssetsIntoRootRoute(\n routes[rootRouteId],\n requestAssets,\n ),\n },\n }\n}\n\nexport function attachRouterServerSsrUtils({\n router,\n manifest,\n getRequestAssets,\n}: {\n router: AnyRouter\n manifest: ServerManifest | undefined\n getRequestAssets?: () => ManifestRouteAssets | undefined\n}) {\n // Inline CSS joining and route filtering depend only on matched route ids,\n // so keep that immutable preparation request-local. Request assets can be\n // discovered between head and Scripts reads and may mutate in place; always\n // compose their current contents instead of caching by object identity.\n let memoizedPreparedManifest:\n | {\n cacheKey: string\n inlineCssAsset: Manifest['inlineStyle'] | undefined\n routes: FilteredRoutes\n }\n | undefined\n router.ssr = {\n get manifest() {\n if (!manifest) {\n return manifest\n }\n\n const requestAssets = getRequestAssets?.()\n const hasAssets = hasRequestAssets(requestAssets)\n\n if (!hasAssets && !manifest.inlineCss) {\n return manifest\n }\n\n let inlineCssAsset: Manifest['inlineStyle'] | undefined\n let routes = manifest.routes\n if (manifest.inlineCss) {\n const matches = _getRenderedMatches(router.stores.matches.get())\n const cacheKey = getMatchedRoutesCacheKey(matches)\n if (memoizedPreparedManifest?.cacheKey === cacheKey) {\n inlineCssAsset = memoizedPreparedManifest.inlineCssAsset\n routes = memoizedPreparedManifest.routes\n } else {\n const preparedManifest = getPreparedMatchedManifestRoutes(\n manifest,\n matches,\n cacheKey,\n )\n inlineCssAsset = getInlineCssAssetForPreparedRoutes(\n manifest,\n preparedManifest,\n )\n if (preparedManifest.hasStrippedRoutes) {\n routes = { ...manifest.routes, ...preparedManifest.routes }\n }\n memoizedPreparedManifest = { cacheKey, inlineCssAsset, routes }\n }\n }\n\n return composeManifest(\n manifest.scriptFormat,\n inlineCssAsset,\n routes,\n hasAssets ? requestAssets : undefined,\n )\n },\n }\n let dehydrationPhase: DehydrationPhase = 'idle'\n let renderFinished = false\n const renderFinishedListeners: Array<() => void> = []\n const cleanupListeners: Array<(settled: boolean) => void> = []\n let cleanupStarted = false\n // Every value the router dehydrated has settled: nothing it started can\n // still be pending when the response ends.\n let settled = false\n let disposeSerialization: (() => void) | undefined\n const hydrationScripts = createHydrationScripts(router.options.ssr?.nonce)\n\n const serverSsr: ServerSsr = {\n hydrationScripts,\n dehydrate: async (opts?: {\n requestAssets?: ManifestRouteAssets\n signal?: AbortSignal\n }) => {\n // Guard synchronously before the first await: a concurrent second call\n // would double-serialize and corrupt the hydration payload.\n if (dehydrationPhase !== 'idle') {\n if (process.env.NODE_ENV !== 'production') {\n throw new Error(\n dehydrationPhase === 'disabled'\n ? 'Invariant failed: hydration is disabled for this request!'\n : 'Invariant failed: router is already dehydrated!',\n )\n }\n\n invariant()\n }\n opts?.signal?.throwIfAborted()\n dehydrationPhase = 'started'\n let matchesToDehydrate = _getRenderedMatches(router.stores.matches.get())\n const isShell = router.isShell()\n if (isShell) {\n // In SPA mode we only want to dehydrate the root match\n matchesToDehydrate = matchesToDehydrate.slice(0, 1)\n }\n const matches = matchesToDehydrate.map(dehydrateMatch)\n\n let manifestToDehydrate: Manifest | undefined = undefined\n // Only currently matched routes are dehydrated. Other route assets are\n // loaded through dynamic imports when those routes become active.\n if (manifest) {\n const cacheKey = getMatchedRoutesCacheKey(matchesToDehydrate)\n const preparedManifest = getPreparedMatchedManifestRoutes(\n manifest,\n matchesToDehydrate,\n cacheKey,\n )\n\n manifestToDehydrate = composeManifest(\n manifest.scriptFormat,\n preparedManifest.inlineCssHrefs\n ? createInlineCssPlaceholderAsset()\n : undefined,\n preparedManifest.routes,\n opts?.requestAssets,\n )\n }\n const dehydratedRouter: DehydratedRouter = {\n manifest: manifestToDehydrate,\n matches,\n }\n const dehydrate = router.options.dehydrate\n const dehydratedData = dehydrate\n ? opts?.signal\n ? await waitForReason(dehydrate.call(router.options), opts.signal)\n : await dehydrate.call(router.options)\n : undefined\n opts?.signal?.throwIfAborted()\n if (cleanupStarted) {\n return\n }\n if (dehydratedData !== undefined) {\n dehydratedRouter.dehydratedData = dehydratedData\n }\n const trackPlugins = { didRun: false }\n const serializationAdapters = router.options.serializationAdapters\n const plugins = serializationAdapters\n ? [\n ...serializationAdapters.map((adapter) =>\n makeSsrSerovalPlugin(adapter, trackPlugins),\n ),\n ...ssrSerovalPlugins,\n ]\n : ssrSerovalPlugins\n\n let serializationCompleteSignaled = false\n let initialSerialized = false\n const completeScriptSerialization = (\n result: boolean | { error: unknown },\n ) => {\n if (serializationCompleteSignaled || cleanupStarted) {\n return\n }\n serializationCompleteSignaled = true\n const dispose = disposeSerialization\n disposeSerialization = undefined\n if (result === true) {\n settled = true\n hydrationScripts.finish()\n } else if (result) {\n hydrationScripts.fail(result.error)\n }\n if (dispose) {\n // Seroval invokes completion callbacks before it marks its stream as\n // inactive. Clear ownership before notifying the hydration consumer,\n // which can synchronously clean up this request, then dispose later.\n queueMicrotask(() => disposeSerializationSafely(dispose))\n }\n }\n\n let synchronousFailure: { error: unknown } | undefined\n const dispose = crossSerializeStream(dehydratedRouter, {\n refs: new Map(),\n plugins,\n onSerialize: (data, initial) => {\n if (serializationCompleteSignaled || cleanupStarted) {\n return\n }\n initialSerialized ||= initial\n if (\n !hydrationScripts.pushSerializedSource(\n data,\n initial,\n trackPlugins.didRun,\n )\n ) {\n // Rejected output stops the producer while deferred work may remain.\n completeScriptSerialization(false)\n }\n },\n onError: (err: unknown) => {\n if (serializationCompleteSignaled || cleanupStarted) {\n return\n }\n console.error('Serialization error:', err)\n synchronousFailure = { error: err }\n completeScriptSerialization({ error: err })\n },\n scopeId: SSR_SERIALIZATION_SCOPE_ID,\n onDone: () => {\n if (initialSerialized) {\n completeScriptSerialization(true)\n }\n },\n })\n // Seroval can call onDone synchronously before it returns dispose().\n if (cleanupStarted || serializationCompleteSignaled) {\n disposeSerializationSafely(dispose)\n } else {\n disposeSerialization = dispose\n }\n if (synchronousFailure) {\n throw synchronousFailure.error\n }\n },\n onRenderFinished: (listener) => {\n if (cleanupStarted) {\n return\n }\n if (renderFinished) {\n try {\n listener()\n } catch (error) {\n console.error('Error in render finished listener:', error)\n }\n return\n }\n renderFinishedListeners.push(listener)\n },\n onCleanup: (listener) => {\n if (cleanupStarted) {\n // Cleanup already happened (or is running). Invoke immediately so\n // late registrants can still release their resources instead of\n // silently retaining them (standard disposer convention).\n try {\n listener(settled)\n } catch (error) {\n console.error('Error in SSR cleanup listener:', error)\n }\n return\n }\n cleanupListeners.push(listener)\n },\n setRenderFinished: () => {\n if (cleanupStarted || renderFinished) {\n return\n }\n renderFinished = true\n hydrationScripts.liftBarrier()\n notifyAndClearListeners(\n renderFinishedListeners,\n 'Error in render finished listener:',\n undefined,\n )\n },\n disableHydration: () => {\n if (cleanupStarted || dehydrationPhase === 'disabled') {\n return\n }\n if (dehydrationPhase !== 'idle') {\n if (process.env.NODE_ENV !== 'production') {\n throw new Error(\n 'Invariant failed: cannot disable hydration after dehydrate()!',\n )\n }\n\n invariant()\n }\n // The owner rejects later takes/claims; guard order matters so a\n // throwing owner does not leave the phase half-set.\n hydrationScripts.disableHydration()\n dehydrationPhase = 'disabled'\n },\n takeInitialHydrationScriptTags:\n hydrationScripts.takeInitialHydrationScriptTags,\n cleanup() {\n // Guard against multiple/reentrant cleanup calls. A listener could call\n // cleanup() again indirectly; snapshot + clear before invoking so each\n // listener runs exactly once and reentry is a no-op.\n if (cleanupStarted) {\n return\n }\n cleanupStarted = true\n hydrationScripts.cleanup()\n const dispose = disposeSerialization\n disposeSerialization = undefined\n disposeSerializationSafely(dispose)\n notifyAndClearListeners(\n cleanupListeners,\n 'Error in SSR cleanup listener:',\n settled,\n )\n renderFinishedListeners.length = 0\n router.ssr = undefined\n router.serverSsr = undefined\n },\n }\n\n router.serverSsr = serverSsr\n for (const listener of router.serverSsrLifecycle?.onServerSsrAttach ?? []) {\n try {\n listener(serverSsr)\n } catch (err) {\n console.error('SSR attach listener error:', err)\n }\n }\n}\n\n/**\n * Get the origin for the request.\n *\n * SECURITY: We intentionally do NOT trust the Origin header for determining\n * the router's origin. The Origin header can be spoofed by attackers, which\n * could lead to SSRF-like vulnerabilities where redirects are constructed\n * using a malicious origin (CVE-2024-34351).\n *\n * Instead, we derive the origin from request.url, which is typically set by\n * the server infrastructure (not client-controlled headers).\n *\n * For applications behind proxies that need to trust forwarded headers,\n * use the router's `origin` option to explicitly configure a trusted origin.\n */\nexport function getOrigin(request: Request) {\n try {\n return new URL(request.url).origin\n } catch {}\n return 'http://localhost'\n}\n\n// server and browser can decode/encode characters differently in paths and search params.\n// Server generally strictly follows the WHATWG URL Standard, while browsers may differ for legacy reasons.\n// for example, in paths \"|\" is not encoded on the server but is encoded on chromium (and not on firefox) while \"대\" is encoded on both sides.\n// Another anomaly is that in Node new URLSearchParams and new URL also decode/encode characters differently.\n// new URLSearchParams() encodes \"|\" while new URL() does not, and in this instance\n// chromium treats search params differently than paths, i.e. \"|\" is not encoded in search params.\nexport function getNormalizedURL(url: string | URL, base?: string | URL) {\n // ensure backslashes are encoded correctly in the URL\n if (typeof url === 'string') {\n url = url.replace('\\\\', '%5C')\n }\n\n const rawUrl = new URL(url, base)\n // URL parsing has already handled backslashes and ignored controls. A pathname\n // like \"//evil.example\" would become a protocol-relative URL when rebuilt below.\n const handledProtocolRelativeURL = rawUrl.pathname.startsWith('//')\n const decodedPathname = decodePath(\n handledProtocolRelativeURL\n ? rawUrl.pathname.replace(/^\\/+/, '/')\n : rawUrl.pathname,\n )\n const searchParams = new URLSearchParams(rawUrl.search)\n const normalizedHref =\n decodedPathname +\n (searchParams.size > 0 ? '?' : '') +\n searchParams.toString() +\n rawUrl.hash\n\n return {\n url: new URL(normalizedHref, rawUrl.origin),\n handledProtocolRelativeURL,\n 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