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opt
/
canhelp
/
node_modules
/
next
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dist
/
server
/
app-render
/
/opt/canhelp/node_modules/next/dist/server/app-render
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/opt/canhelp/node_modules/next/dist/server/app-render/action-handler.js.map
(68350B)
{"version":3,"sources":["../../../src/server/app-render/action-handler.ts"],"sourcesContent":["import type { IncomingHttpHeaders, OutgoingHttpHeaders } from 'node:http'\nimport type { SizeLimit } from '../../types'\nimport type { RequestStore } from '../app-render/work-unit-async-storage.external'\nimport type { AppRenderContext, GenerateFlight } from './app-render'\nimport type { AppPageModule } from '../route-modules/app-page/module'\nimport type { BaseNextRequest, BaseNextResponse } from '../base-http'\nimport type { ActionManifest } from '../../build/webpack/plugins/flight-client-entry-plugin'\n\nimport {\n RSC_HEADER,\n RSC_CONTENT_TYPE_HEADER,\n NEXT_ROUTER_STATE_TREE_HEADER,\n ACTION_HEADER,\n NEXT_ACTION_NOT_FOUND_HEADER,\n NEXT_ROUTER_PREFETCH_HEADER,\n NEXT_ROUTER_SEGMENT_PREFETCH_HEADER,\n NEXT_URL,\n} from '../../client/components/app-router-headers'\nimport {\n getAccessFallbackHTTPStatus,\n isHTTPAccessFallbackError,\n} from '../../client/components/http-access-fallback/http-access-fallback'\nimport {\n getRedirectTypeFromError,\n getURLFromRedirectError,\n} from '../../client/components/redirect'\nimport {\n isRedirectError,\n type RedirectType,\n} from '../../client/components/redirect-error'\nimport RenderResult, {\n type AppPageRenderResultMetadata,\n} from '../render-result'\nimport type { WorkStore } from '../app-render/work-async-storage.external'\nimport { FlightRenderResult } from './flight-render-result'\nimport {\n filterReqHeaders,\n actionsForbiddenHeaders,\n} from '../lib/server-ipc/utils'\nimport { getModifiedCookieValues } from '../web/spec-extension/adapters/request-cookies'\n\nimport {\n JSON_CONTENT_TYPE_HEADER,\n NEXT_CACHE_REVALIDATED_TAGS_HEADER,\n NEXT_CACHE_REVALIDATE_TAG_TOKEN_HEADER,\n} from '../../lib/constants'\nimport { getServerActionRequestMetadata } from '../lib/server-action-request-meta'\nimport { isCsrfOriginAllowed } from './csrf-protection'\nimport { warn } from '../../build/output/log'\nimport { RequestCookies, ResponseCookies } from '../web/spec-extension/cookies'\nimport { HeadersAdapter } from '../web/spec-extension/adapters/headers'\nimport { fromNodeOutgoingHttpHeaders } from '../web/utils'\nimport { selectWorkerForForwarding } from './action-utils'\nimport { isNodeNextRequest, isWebNextRequest } from '../base-http/helpers'\nimport { RedirectStatusCode } from '../../client/components/redirect-status-code'\nimport { synchronizeMutableCookies } from '../async-storage/request-store'\nimport type { TemporaryReferenceSet } from 'react-server-dom-webpack/server'\nimport { workUnitAsyncStorage } from '../app-render/work-unit-async-storage.external'\nimport { InvariantError } from '../../shared/lib/invariant-error'\nimport { executeRevalidates } from '../revalidation-utils'\nimport { getRequestMeta } from '../request-meta'\nimport { setCacheBustingSearchParam } from '../../client/components/router-reducer/set-cache-busting-search-param'\n\n/**\n * Checks if the app has any server actions defined in any runtime.\n */\nfunction hasServerActions(manifest: ActionManifest) {\n return (\n Object.keys(manifest.node).length > 0 ||\n Object.keys(manifest.edge).length > 0\n )\n}\n\nfunction nodeHeadersToRecord(\n headers: IncomingHttpHeaders | OutgoingHttpHeaders\n) {\n const record: Record<string, string> = {}\n for (const [key, value] of Object.entries(headers)) {\n if (value !== undefined) {\n record[key] = Array.isArray(value) ? value.join(', ') : `${value}`\n }\n }\n return record\n}\n\nfunction getForwardedHeaders(\n req: BaseNextRequest,\n res: BaseNextResponse\n): Headers {\n // Get request headers and cookies\n const requestHeaders = req.headers\n const requestCookies = new RequestCookies(HeadersAdapter.from(requestHeaders))\n\n // Get response headers and cookies\n const responseHeaders = res.getHeaders()\n const responseCookies = new ResponseCookies(\n fromNodeOutgoingHttpHeaders(responseHeaders)\n )\n\n // Merge request and response headers\n const mergedHeaders = filterReqHeaders(\n {\n ...nodeHeadersToRecord(requestHeaders),\n ...nodeHeadersToRecord(responseHeaders),\n },\n actionsForbiddenHeaders\n ) as Record<string, string>\n\n // Merge cookies into requestCookies, so responseCookies always take precedence\n // and overwrite/delete those from requestCookies.\n responseCookies.getAll().forEach((cookie) => {\n if (typeof cookie.value === 'undefined') {\n requestCookies.delete(cookie.name)\n } else {\n requestCookies.set(cookie)\n }\n })\n\n // Update the 'cookie' header with the merged cookies\n mergedHeaders['cookie'] = requestCookies.toString()\n\n // Remove headers that should not be forwarded\n delete mergedHeaders['transfer-encoding']\n\n return new Headers(mergedHeaders)\n}\n\nfunction addRevalidationHeader(\n res: BaseNextResponse,\n {\n workStore,\n requestStore,\n }: {\n workStore: WorkStore\n requestStore: RequestStore\n }\n) {\n // If a tag was revalidated, the client router needs to invalidate all the\n // client router cache as they may be stale. And if a path was revalidated, the\n // client needs to invalidate all subtrees below that path.\n\n // To keep the header size small, we use a tuple of\n // [[revalidatedPaths], isTagRevalidated ? 1 : 0, isCookieRevalidated ? 1 : 0]\n // instead of a JSON object.\n\n // TODO-APP: Currently the prefetch cache doesn't have subtree information,\n // so we need to invalidate the entire cache if a path was revalidated.\n // TODO-APP: Currently paths are treated as tags, so the second element of the tuple\n // is always empty.\n\n const isTagRevalidated = workStore.pendingRevalidatedTags?.length ? 1 : 0\n const isCookieRevalidated = getModifiedCookieValues(\n requestStore.mutableCookies\n ).length\n ? 1\n : 0\n\n res.setHeader(\n 'x-action-revalidated',\n JSON.stringify([[], isTagRevalidated, isCookieRevalidated])\n )\n}\n\n/**\n * Forwards a server action request to a separate worker. Used when the requested action is not available in the current worker.\n */\nasync function createForwardedActionResponse(\n req: BaseNextRequest,\n res: BaseNextResponse,\n host: Host,\n workerPathname: string,\n basePath: string\n) {\n if (!host) {\n throw new Error(\n 'Invariant: Missing `host` header from a forwarded Server Actions request.'\n )\n }\n\n const forwardedHeaders = getForwardedHeaders(req, res)\n\n // indicate that this action request was forwarded from another worker\n // we use this to skip rendering the flight tree so that we don't update the UI\n // with the response from the forwarded worker\n forwardedHeaders.set('x-action-forwarded', '1')\n\n const proto =\n getRequestMeta(req, 'initProtocol')?.replace(/:+$/, '') || 'https'\n\n // For standalone or the serverful mode, use the internal origin directly\n // other than the host headers from the request.\n const origin = process.env.__NEXT_PRIVATE_ORIGIN || `${proto}://${host.value}`\n\n const fetchUrl = new URL(`${origin}${basePath}${workerPathname}`)\n\n try {\n let body: BodyInit | ReadableStream<Uint8Array> | undefined\n if (\n // The type check here ensures that `req` is correctly typed, and the\n // environment variable check provides dead code elimination.\n process.env.NEXT_RUNTIME === 'edge' &&\n isWebNextRequest(req)\n ) {\n if (!req.body) {\n throw new Error('Invariant: missing request body.')\n }\n\n body = req.body\n } else if (\n // The type check here ensures that `req` is correctly typed, and the\n // environment variable check provides dead code elimination.\n process.env.NEXT_RUNTIME !== 'edge' &&\n isNodeNextRequest(req)\n ) {\n body = req.stream()\n } else {\n throw new Error('Invariant: Unknown request type.')\n }\n\n // Forward the request to the new worker\n const response = await fetch(fetchUrl, {\n method: 'POST',\n body,\n duplex: 'half',\n headers: forwardedHeaders,\n redirect: 'manual',\n next: {\n // @ts-ignore\n internal: 1,\n },\n })\n\n if (\n response.headers.get('content-type')?.startsWith(RSC_CONTENT_TYPE_HEADER)\n ) {\n // copy the headers from the redirect response to the response we're sending\n for (const [key, value] of response.headers) {\n if (!actionsForbiddenHeaders.includes(key)) {\n res.setHeader(key, value)\n }\n }\n\n return new FlightRenderResult(response.body!)\n } else {\n // Since we aren't consuming the response body, we cancel it to avoid memory leaks\n response.body?.cancel()\n }\n } catch (err) {\n // we couldn't stream the forwarded response, so we'll just return an empty response\n console.error(`failed to forward action response`, err)\n }\n\n return RenderResult.fromStatic('{}', JSON_CONTENT_TYPE_HEADER)\n}\n\n/**\n * Returns the parsed redirect URL if we deem that it is hosted by us.\n *\n * We handle both relative and absolute redirect URLs.\n *\n * In case the redirect URL is not relative to the application we return `null`.\n */\nfunction getAppRelativeRedirectUrl(\n basePath: string,\n host: Host,\n redirectUrl: string\n): URL | null {\n if (redirectUrl.startsWith('/') || redirectUrl.startsWith('.')) {\n // Make sure we are appending the basePath to relative URLS\n return new URL(`${basePath}${redirectUrl}`, 'http://n')\n }\n\n const parsedRedirectUrl = new URL(redirectUrl)\n\n if (host?.value !== parsedRedirectUrl.host) {\n return null\n }\n\n // At this point the hosts are the same, just confirm we\n // are routing to a path underneath the `basePath`\n return parsedRedirectUrl.pathname.startsWith(basePath)\n ? parsedRedirectUrl\n : null\n}\n\nasync function createRedirectRenderResult(\n req: BaseNextRequest,\n res: BaseNextResponse,\n originalHost: Host,\n redirectUrl: string,\n redirectType: RedirectType,\n basePath: string,\n workStore: WorkStore\n) {\n res.setHeader('x-action-redirect', `${redirectUrl};${redirectType}`)\n\n // If we're redirecting to another route of this Next.js application, we'll\n // try to stream the response from the other worker path. When that works,\n // we can save an extra roundtrip and avoid a full page reload.\n // When the redirect URL starts with a `/` or is to the same host, under the\n // `basePath` we treat it as an app-relative redirect;\n const appRelativeRedirectUrl = getAppRelativeRedirectUrl(\n basePath,\n originalHost,\n redirectUrl\n )\n\n if (appRelativeRedirectUrl) {\n if (!originalHost) {\n throw new Error(\n 'Invariant: Missing `host` header from a forwarded Server Actions request.'\n )\n }\n\n const forwardedHeaders = getForwardedHeaders(req, res)\n forwardedHeaders.set(RSC_HEADER, '1')\n\n const proto =\n getRequestMeta(req, 'initProtocol')?.replace(/:+$/, '') || 'https'\n\n // For standalone or the serverful mode, use the internal origin directly\n // other than the host headers from the request.\n const origin =\n process.env.__NEXT_PRIVATE_ORIGIN || `${proto}://${originalHost.value}`\n\n const fetchUrl = new URL(\n `${origin}${appRelativeRedirectUrl.pathname}${appRelativeRedirectUrl.search}`\n )\n\n if (workStore.pendingRevalidatedTags) {\n forwardedHeaders.set(\n NEXT_CACHE_REVALIDATED_TAGS_HEADER,\n workStore.pendingRevalidatedTags.join(',')\n )\n forwardedHeaders.set(\n NEXT_CACHE_REVALIDATE_TAG_TOKEN_HEADER,\n workStore.incrementalCache?.prerenderManifest?.preview?.previewModeId ||\n ''\n )\n }\n\n // Ensures that when the path was revalidated we don't return a partial response on redirects\n forwardedHeaders.delete(NEXT_ROUTER_STATE_TREE_HEADER)\n // When an action follows a redirect, it's no longer handling an action: it's just a normal RSC request\n // to the requested URL. We should remove the `next-action` header so that it's not treated as an action\n forwardedHeaders.delete(ACTION_HEADER)\n\n try {\n setCacheBustingSearchParam(fetchUrl, {\n [NEXT_ROUTER_PREFETCH_HEADER]: forwardedHeaders.get(\n NEXT_ROUTER_PREFETCH_HEADER\n )\n ? ('1' as const)\n : undefined,\n [NEXT_ROUTER_SEGMENT_PREFETCH_HEADER]:\n forwardedHeaders.get(NEXT_ROUTER_SEGMENT_PREFETCH_HEADER) ??\n undefined,\n [NEXT_ROUTER_STATE_TREE_HEADER]:\n forwardedHeaders.get(NEXT_ROUTER_STATE_TREE_HEADER) ?? undefined,\n [NEXT_URL]: forwardedHeaders.get(NEXT_URL) ?? undefined,\n })\n\n const response = await fetch(fetchUrl, {\n method: 'GET',\n headers: forwardedHeaders,\n next: {\n // @ts-ignore\n internal: 1,\n },\n })\n\n if (\n response.headers\n .get('content-type')\n ?.startsWith(RSC_CONTENT_TYPE_HEADER)\n ) {\n // copy the headers from the redirect response to the response we're sending\n for (const [key, value] of response.headers) {\n if (!actionsForbiddenHeaders.includes(key)) {\n res.setHeader(key, value)\n }\n }\n\n return new FlightRenderResult(response.body!)\n } else {\n // Since we aren't consuming the response body, we cancel it to avoid memory leaks\n response.body?.cancel()\n }\n } catch (err) {\n // we couldn't stream the redirect response, so we'll just do a normal redirect\n console.error(`failed to get redirect response`, err)\n }\n }\n\n return RenderResult.EMPTY\n}\n\n// Used to compare Host header and Origin header.\nconst enum HostType {\n XForwardedHost = 'x-forwarded-host',\n Host = 'host',\n}\ntype Host =\n | {\n type: HostType.XForwardedHost\n value: string\n }\n | {\n type: HostType.Host\n value: string\n }\n | undefined\n\n/**\n * Ensures the value of the header can't create long logs.\n */\nfunction limitUntrustedHeaderValueForLogs(value: string) {\n return value.length > 100 ? value.slice(0, 100) + '...' : value\n}\n\nexport function parseHostHeader(\n headers: IncomingHttpHeaders,\n originDomain?: string\n) {\n const forwardedHostHeader = headers['x-forwarded-host']\n const forwardedHostHeaderValue =\n forwardedHostHeader && Array.isArray(forwardedHostHeader)\n ? forwardedHostHeader[0]\n : forwardedHostHeader?.split(',')?.[0]?.trim()\n const hostHeader = headers['host']\n\n if (originDomain) {\n return forwardedHostHeaderValue === originDomain\n ? {\n type: HostType.XForwardedHost,\n value: forwardedHostHeaderValue,\n }\n : hostHeader === originDomain\n ? {\n type: HostType.Host,\n value: hostHeader,\n }\n : undefined\n }\n\n return forwardedHostHeaderValue\n ? {\n type: HostType.XForwardedHost,\n value: forwardedHostHeaderValue,\n }\n : hostHeader\n ? {\n type: HostType.Host,\n value: hostHeader,\n }\n : undefined\n}\n\ntype ServerModuleMap = Record<\n string,\n {\n id: string\n chunks: string[]\n name: string\n }\n>\n\ntype ServerActionsConfig = {\n bodySizeLimit?: SizeLimit\n allowedOrigins?: string[]\n}\n\ntype HandleActionResult =\n | {\n /** An MPA action threw notFound(), and we need to render the appropriate HTML */\n type: 'not-found'\n }\n | {\n type: 'done'\n result: RenderResult | undefined\n formState?: any\n }\n /** The request turned out not to be a server action. */\n | null\n\nexport async function handleAction({\n req,\n res,\n ComponentMod,\n serverModuleMap,\n generateFlight,\n workStore,\n requestStore,\n serverActions,\n ctx,\n metadata,\n}: {\n req: BaseNextRequest\n res: BaseNextResponse\n ComponentMod: AppPageModule\n serverModuleMap: ServerModuleMap\n generateFlight: GenerateFlight\n workStore: WorkStore\n requestStore: RequestStore\n serverActions?: ServerActionsConfig\n ctx: AppRenderContext\n metadata: AppPageRenderResultMetadata\n}): Promise<HandleActionResult> {\n const contentType = req.headers['content-type']\n const { serverActionsManifest, page } = ctx.renderOpts\n\n const {\n actionId,\n isMultipartAction,\n isFetchAction,\n isURLEncodedAction,\n isPossibleServerAction,\n } = getServerActionRequestMetadata(req)\n\n const handleUnrecognizedFetchAction = (err: unknown): HandleActionResult => {\n // If the deployment doesn't have skew protection, this is expected to occasionally happen,\n // so we use a warning instead of an error.\n console.warn(err)\n\n // Return an empty response with a header that the client router will interpret.\n // We don't need to waste time encoding a flight response, and using a blank body + header\n // means that unrecognized actions can also be handled at the infra level\n // (i.e. without needing to invoke a lambda)\n res.setHeader(NEXT_ACTION_NOT_FOUND_HEADER, '1')\n res.setHeader('content-type', 'text/plain')\n res.statusCode = 404\n return {\n type: 'done',\n result: RenderResult.fromStatic('Server action not found.', 'text/plain'),\n }\n }\n\n // If it can't be a Server Action, skip handling.\n // Note that this can be a false positive -- any multipart/urlencoded POST can get us here,\n // But won't know if it's an MPA action or not until we call `decodeAction` below.\n if (!isPossibleServerAction) {\n return null\n }\n\n // We don't currently support URL encoded actions, so we bail out early.\n // Depending on if it's a fetch action or an MPA, we return a different response.\n if (isURLEncodedAction) {\n if (isFetchAction) {\n return {\n type: 'not-found',\n }\n } else {\n // This is an MPA action, so we return null\n return null\n }\n }\n\n // If the app has no server actions at all, we can 404 early.\n if (!hasServerActions(serverActionsManifest)) {\n return handleUnrecognizedFetchAction(getActionNotFoundError(actionId))\n }\n\n if (workStore.isStaticGeneration) {\n throw new Error(\n \"Invariant: server actions can't be handled during static rendering\"\n )\n }\n\n let temporaryReferences: TemporaryReferenceSet | undefined\n\n // When running actions the default is no-store, you can still `cache: 'force-cache'`\n workStore.fetchCache = 'default-no-store'\n\n const originDomain =\n typeof req.headers['origin'] === 'string'\n ? new URL(req.headers['origin']).host\n : undefined\n const host = parseHostHeader(req.headers)\n\n let warning: string | undefined = undefined\n\n function warnBadServerActionRequest() {\n if (warning) {\n warn(warning)\n }\n }\n // This is to prevent CSRF attacks. If `x-forwarded-host` is set, we need to\n // ensure that the request is coming from the same host.\n if (!originDomain) {\n // This might be an old browser that doesn't send `host` header. We ignore\n // this case.\n warning = 'Missing `origin` header from a forwarded Server Actions request.'\n } else if (!host || originDomain !== host.value) {\n // If the customer sets a list of allowed origins, we'll allow the request.\n // These are considered safe but might be different from forwarded host set\n // by the infra (i.e. reverse proxies).\n if (isCsrfOriginAllowed(originDomain, serverActions?.allowedOrigins)) {\n // Ignore it\n } else {\n if (host) {\n // This seems to be an CSRF attack. We should not proceed the action.\n console.error(\n `\\`${\n host.type\n }\\` header with value \\`${limitUntrustedHeaderValueForLogs(\n host.value\n )}\\` does not match \\`origin\\` header with value \\`${limitUntrustedHeaderValueForLogs(\n originDomain\n )}\\` from a forwarded Server Actions request. Aborting the action.`\n )\n } else {\n // This is an attack. We should not proceed the action.\n console.error(\n `\\`x-forwarded-host\\` or \\`host\\` headers are not provided. One of these is needed to compare the \\`origin\\` header from a forwarded Server Actions request. Aborting the action.`\n )\n }\n\n const error = new Error('Invalid Server Actions request.')\n\n if (isFetchAction) {\n res.statusCode = 500\n metadata.statusCode = 500\n\n const promise = Promise.reject(error)\n try {\n // we need to await the promise to trigger the rejection early\n // so that it's already handled by the time we call\n // the RSC runtime. Otherwise, it will throw an unhandled\n // promise rejection error in the renderer.\n await promise\n } catch {\n // swallow error, it's gonna be handled on the client\n }\n\n return {\n type: 'done',\n result: await generateFlight(req, ctx, requestStore, {\n actionResult: promise,\n // We didn't execute an action, so no revalidations could have occurred. We can skip rendering the page.\n skipFlight: true,\n temporaryReferences,\n }),\n }\n }\n\n throw error\n }\n }\n\n // ensure we avoid caching server actions unexpectedly\n res.setHeader(\n 'Cache-Control',\n 'no-cache, no-store, max-age=0, must-revalidate'\n )\n\n const { actionAsyncStorage } = ComponentMod\n\n const actionWasForwarded = Boolean(req.headers['x-action-forwarded'])\n\n if (actionId) {\n const forwardedWorker = selectWorkerForForwarding(\n actionId,\n page,\n serverActionsManifest\n )\n\n // If forwardedWorker is truthy, it means there isn't a worker for the action\n // in the current handler, so we forward the request to a worker that has the action.\n if (forwardedWorker) {\n return {\n type: 'done',\n result: await createForwardedActionResponse(\n req,\n res,\n host,\n forwardedWorker,\n ctx.renderOpts.basePath\n ),\n }\n }\n }\n\n try {\n return await actionAsyncStorage.run(\n { isAction: true },\n async (): Promise<HandleActionResult> => {\n // We only use these for fetch actions -- MPA actions handle them inside `decodeAction`.\n let actionModId: string | undefined\n let boundActionArguments: unknown[] = []\n\n if (\n // The type check here ensures that `req` is correctly typed, and the\n // environment variable check provides dead code elimination.\n process.env.NEXT_RUNTIME === 'edge' &&\n isWebNextRequest(req)\n ) {\n if (!req.body) {\n throw new Error('invariant: Missing request body.')\n }\n\n // TODO: add body limit\n\n // Use react-server-dom-webpack/server\n const {\n createTemporaryReferenceSet,\n decodeReply,\n decodeAction,\n decodeFormState,\n } = ComponentMod\n\n temporaryReferences = createTemporaryReferenceSet()\n\n if (isMultipartAction) {\n // TODO-APP: Add streaming support\n const formData = await req.request.formData()\n if (isFetchAction) {\n // A fetch action with a multipart body.\n\n try {\n actionModId = getActionModIdOrError(actionId, serverModuleMap)\n } catch (err) {\n return handleUnrecognizedFetchAction(err)\n }\n\n boundActionArguments = await decodeReply(\n formData,\n serverModuleMap,\n { temporaryReferences }\n )\n } else {\n // Multipart POST, but not a fetch action.\n // Potentially an MPA action, we have to try decoding it to check.\n if (areAllActionIdsValid(formData, serverModuleMap) === false) {\n // TODO: This can be from skew or manipulated input. We should handle this case\n // more gracefully but this preserves the prior behavior where decodeAction would throw instead.\n throw new Error(\n `Failed to find Server Action. This request might be from an older or newer deployment.\\nRead more: https://nextjs.org/docs/messages/failed-to-find-server-action`\n )\n }\n\n const action = await decodeAction(formData, serverModuleMap)\n if (typeof action === 'function') {\n // an MPA action.\n\n // Only warn if it's a server action, otherwise skip for other post requests\n warnBadServerActionRequest()\n\n const actionReturnedState =\n await executeActionAndPrepareForRender(\n action as () => Promise<unknown>,\n [],\n workStore,\n requestStore\n )\n\n const formState = await decodeFormState(\n actionReturnedState,\n formData,\n serverModuleMap\n )\n\n // Skip the fetch path.\n // We need to render a full HTML version of the page for the response, we'll handle that in app-render.\n return {\n type: 'done',\n result: undefined,\n formState,\n }\n } else {\n // We couldn't decode an action, so this POST request turned out not to be a server action request.\n return null\n }\n }\n } else {\n // POST with non-multipart body.\n\n // If it's not multipart AND not a fetch action,\n // then it can't be an action request.\n if (!isFetchAction) {\n return null\n }\n\n try {\n actionModId = getActionModIdOrError(actionId, serverModuleMap)\n } catch (err) {\n return handleUnrecognizedFetchAction(err)\n }\n\n // A fetch action with a non-multipart body.\n // In practice, this happens if `encodeReply` returned a string instead of FormData,\n // which can happen for very simple JSON-like values that don't need multiple flight rows.\n\n const chunks: Buffer[] = []\n const reader = req.body.getReader()\n while (true) {\n const { done, value } = await reader.read()\n if (done) {\n break\n }\n\n chunks.push(value)\n }\n\n const actionData = Buffer.concat(chunks).toString('utf-8')\n\n boundActionArguments = await decodeReply(\n actionData,\n serverModuleMap,\n { temporaryReferences }\n )\n }\n } else if (\n // The type check here ensures that `req` is correctly typed, and the\n // environment variable check provides dead code elimination.\n process.env.NEXT_RUNTIME !== 'edge' &&\n isNodeNextRequest(req)\n ) {\n // Use react-server-dom-webpack/server.node which supports streaming\n const {\n createTemporaryReferenceSet,\n decodeReply,\n decodeReplyFromBusboy,\n decodeAction,\n decodeFormState,\n } = require(\n `./react-server.node`\n ) as typeof import('./react-server.node')\n\n temporaryReferences = createTemporaryReferenceSet()\n\n const { Transform, pipeline } =\n require('node:stream') as typeof import('node:stream')\n\n const defaultBodySizeLimit = '1 MB'\n const bodySizeLimit =\n serverActions?.bodySizeLimit ?? defaultBodySizeLimit\n const bodySizeLimitBytes =\n bodySizeLimit !== defaultBodySizeLimit\n ? (\n require('next/dist/compiled/bytes') as typeof import('next/dist/compiled/bytes')\n ).parse(bodySizeLimit)\n : 1024 * 1024 // 1 MB\n\n let size = 0\n const sizeLimitTransform = new Transform({\n transform(chunk, encoding, callback) {\n size += Buffer.byteLength(chunk, encoding)\n if (size > bodySizeLimitBytes) {\n const { ApiError } =\n require('../api-utils') as typeof import('../api-utils')\n\n callback(\n new ApiError(\n 413,\n `Body exceeded ${bodySizeLimit} limit.\\n` +\n `To configure the body size limit for Server Actions, see: https://nextjs.org/docs/app/api-reference/next-config-js/serverActions#bodysizelimit`\n )\n )\n return\n }\n\n callback(null, chunk)\n },\n })\n\n const sizeLimitedBody = pipeline(\n req.body,\n sizeLimitTransform,\n // Avoid unhandled errors from `pipeline()` by passing an empty completion callback.\n // We'll propagate the errors properly when consuming the stream.\n () => {}\n )\n\n if (isMultipartAction) {\n if (isFetchAction) {\n // A fetch action with a multipart body.\n\n try {\n actionModId = getActionModIdOrError(actionId, serverModuleMap)\n } catch (err) {\n return handleUnrecognizedFetchAction(err)\n }\n\n const busboy = (\n require('next/dist/compiled/busboy') as typeof import('next/dist/compiled/busboy')\n )({\n defParamCharset: 'utf8',\n headers: req.headers,\n limits: { fieldSize: bodySizeLimitBytes },\n })\n\n // We need to use `pipeline(one, two)` instead of `one.pipe(two)` to propagate size limit errors correctly.\n pipeline(\n sizeLimitedBody,\n busboy,\n // Avoid unhandled errors from `pipeline()` by passing an empty completion callback.\n // We'll propagate the errors properly when consuming the stream.\n () => {}\n )\n\n boundActionArguments = await decodeReplyFromBusboy(\n busboy,\n serverModuleMap,\n { temporaryReferences }\n )\n } else {\n // Multipart POST, but not a fetch action.\n // Potentially an MPA action, we have to try decoding it to check.\n\n // React doesn't yet publish a busboy version of decodeAction\n // so we polyfill the parsing of FormData.\n const fakeRequest = new Request('http://localhost', {\n method: 'POST',\n // @ts-expect-error\n headers: { 'Content-Type': contentType },\n body: new ReadableStream({\n start: (controller) => {\n sizeLimitedBody.on('data', (chunk) => {\n controller.enqueue(new Uint8Array(chunk))\n })\n sizeLimitedBody.on('end', () => {\n controller.close()\n })\n sizeLimitedBody.on('error', (err) => {\n controller.error(err)\n })\n },\n }),\n duplex: 'half',\n })\n\n const formData = await fakeRequest.formData()\n\n if (areAllActionIdsValid(formData, serverModuleMap) === false) {\n // TODO: This can be from skew or manipulated input. We should handle this case\n // more gracefully but this preserves the prior behavior where decodeAction would throw instead.\n throw new Error(\n `Failed to find Server Action. This request might be from an older or newer deployment.\\nRead more: https://nextjs.org/docs/messages/failed-to-find-server-action`\n )\n }\n\n // TODO: Refactor so it is harder to accidentally decode an action before you have validated that the\n // action referred to is available.\n const action = await decodeAction(formData, serverModuleMap)\n if (typeof action === 'function') {\n // an MPA action.\n\n // Only warn if it's a server action, otherwise skip for other post requests\n warnBadServerActionRequest()\n\n const actionReturnedState =\n await executeActionAndPrepareForRender(\n action as () => Promise<unknown>,\n [],\n workStore,\n requestStore\n )\n\n const formState = await decodeFormState(\n actionReturnedState,\n formData,\n serverModuleMap\n )\n\n // Skip the fetch path.\n // We need to render a full HTML version of the page for the response, we'll handle that in app-render.\n return {\n type: 'done',\n result: undefined,\n formState,\n }\n } else {\n // We couldn't decode an action, so this POST request turned out not to be a server action request.\n return null\n }\n }\n } else {\n // POST with non-multipart body.\n\n // If it's not multipart AND not a fetch action,\n // then it can't be an action request.\n if (!isFetchAction) {\n return null\n }\n\n try {\n actionModId = getActionModIdOrError(actionId, serverModuleMap)\n } catch (err) {\n return handleUnrecognizedFetchAction(err)\n }\n\n // A fetch action with a non-multipart body.\n // In practice, this happens if `encodeReply` returned a string instead of FormData,\n // which can happen for very simple JSON-like values that don't need multiple flight rows.\n\n const chunks: Buffer[] = []\n for await (const chunk of sizeLimitedBody) {\n chunks.push(Buffer.from(chunk))\n }\n\n const actionData = Buffer.concat(chunks).toString('utf-8')\n\n boundActionArguments = await decodeReply(\n actionData,\n serverModuleMap,\n { temporaryReferences }\n )\n }\n } else {\n throw new Error('Invariant: Unknown request type.')\n }\n\n // actions.js\n // app/page.js\n // action worker1\n // appRender1\n\n // app/foo/page.js\n // action worker2\n // appRender\n\n // / -> fire action -> POST / -> appRender1 -> modId for the action file\n // /foo -> fire action -> POST /foo -> appRender2 -> modId for the action file\n\n const actionMod = (await ComponentMod.__next_app__.require(\n actionModId\n )) as Record<string, (...args: unknown[]) => Promise<unknown>>\n const actionHandler =\n actionMod[\n // `actionId` must exist if we got here, as otherwise we would have thrown an error above\n actionId!\n ]\n\n const returnVal = await executeActionAndPrepareForRender(\n actionHandler,\n boundActionArguments,\n workStore,\n requestStore\n ).finally(() => {\n addRevalidationHeader(res, { workStore, requestStore })\n })\n\n // For form actions, we need to continue rendering the page.\n if (isFetchAction) {\n const actionResult = await generateFlight(req, ctx, requestStore, {\n actionResult: Promise.resolve(returnVal),\n // if the page was not revalidated, or if the action was forwarded from another worker, we can skip the rendering the flight tree\n skipFlight: !workStore.pathWasRevalidated || actionWasForwarded,\n temporaryReferences,\n })\n\n return {\n type: 'done',\n result: actionResult,\n }\n } else {\n // TODO: this shouldn't be reachable, because all non-fetch codepaths return early.\n // this will be handled in a follow-up refactor PR.\n return null\n }\n }\n )\n } catch (err) {\n if (isRedirectError(err)) {\n const redirectUrl = getURLFromRedirectError(err)\n const redirectType = getRedirectTypeFromError(err)\n\n // if it's a fetch action, we'll set the status code for logging/debugging purposes\n // but we won't set a Location header, as the redirect will be handled by the client router\n res.statusCode = RedirectStatusCode.SeeOther\n metadata.statusCode = RedirectStatusCode.SeeOther\n\n if (isFetchAction) {\n return {\n type: 'done',\n result: await createRedirectRenderResult(\n req,\n res,\n host,\n redirectUrl,\n redirectType,\n ctx.renderOpts.basePath,\n workStore\n ),\n }\n }\n\n // For an MPA action, the redirect doesn't need a body, just a Location header.\n res.setHeader('Location', redirectUrl)\n return {\n type: 'done',\n result: RenderResult.EMPTY,\n }\n } else if (isHTTPAccessFallbackError(err)) {\n res.statusCode = getAccessFallbackHTTPStatus(err)\n metadata.statusCode = res.statusCode\n\n if (isFetchAction) {\n const promise = Promise.reject(err)\n try {\n // we need to await the promise to trigger the rejection early\n // so that it's already handled by the time we call\n // the RSC runtime. Otherwise, it will throw an unhandled\n // promise rejection error in the renderer.\n await promise\n } catch {\n // swallow error, it's gonna be handled on the client\n }\n return {\n type: 'done',\n result: await generateFlight(req, ctx, requestStore, {\n skipFlight: false,\n actionResult: promise,\n temporaryReferences,\n }),\n }\n }\n\n // For an MPA action, we need to render a HTML response. We'll handle that in app-render.\n return {\n type: 'not-found',\n }\n }\n\n // An error that didn't come from `redirect()` or `notFound()`, likely thrown from user code\n // (but it could also be a bug in our code!)\n\n if (isFetchAction) {\n // TODO: consider checking if the error is an `ApiError` and change status code\n // so that we can respond with a 413 to requests that break the body size limit\n // (but if we do that, we also need to make sure that whatever handles the non-fetch error path below does the same)\n res.statusCode = 500\n metadata.statusCode = 500\n const promise = Promise.reject(err)\n try {\n // we need to await the promise to trigger the rejection early\n // so that it's already handled by the time we call\n // the RSC runtime. Otherwise, it will throw an unhandled\n // promise rejection error in the renderer.\n await promise\n } catch {\n // swallow error, it's gonna be handled on the client\n }\n\n return {\n type: 'done',\n result: await generateFlight(req, ctx, requestStore, {\n actionResult: promise,\n // if the page was not revalidated, or if the action was forwarded from another worker, we can skip the rendering the flight tree\n skipFlight: !workStore.pathWasRevalidated || actionWasForwarded,\n temporaryReferences,\n }),\n }\n }\n\n // For an MPA action, we need to render a HTML response. We'll rethrow the error and let it be handled above.\n throw err\n }\n}\n\nasync function executeActionAndPrepareForRender<\n TFn extends (...args: any[]) => Promise<any>,\n>(\n action: TFn,\n args: Parameters<TFn>,\n workStore: WorkStore,\n requestStore: RequestStore\n): Promise<Awaited<ReturnType<TFn>>> {\n requestStore.phase = 'action'\n try {\n return await workUnitAsyncStorage.run(requestStore, () =>\n action.apply(null, args)\n )\n } finally {\n requestStore.phase = 'render'\n\n // When we switch to the render phase, cookies() will return\n // `workUnitStore.cookies` instead of `workUnitStore.userspaceMutableCookies`.\n // We want the render to see any cookie writes that we performed during the action,\n // so we need to update the immutable cookies to reflect the changes.\n synchronizeMutableCookies(requestStore)\n\n // The server action might have toggled draft mode, so we need to reflect\n // that in the work store to be up-to-date for subsequent rendering.\n workStore.isDraftMode = requestStore.draftMode.isEnabled\n\n // If the action called revalidateTag/revalidatePath, then that might affect data used by the subsequent render,\n // so we need to make sure all revalidations are applied before that\n await executeRevalidates(workStore)\n }\n}\n\n/**\n * Attempts to find the module ID for the action from the module map. When this fails, it could be a deployment skew where\n * the action came from a different deployment. It could also simply be an invalid POST request that is not a server action.\n * In either case, we'll throw an error to be handled by the caller.\n */\nfunction getActionModIdOrError(\n actionId: string | null,\n serverModuleMap: ServerModuleMap\n): string {\n // if we're missing the action ID header, we can't do any further processing\n if (!actionId) {\n throw new InvariantError(\"Missing 'next-action' header.\")\n }\n\n const actionModId = serverModuleMap[actionId]?.id\n\n if (!actionModId) {\n throw getActionNotFoundError(actionId)\n }\n\n return actionModId\n}\n\nfunction getActionNotFoundError(actionId: string | null): Error {\n return new Error(\n `Failed to find Server Action${actionId ? ` \"${actionId}\"` : ''}. This request might be from an older or newer deployment.\\nRead more: https://nextjs.org/docs/messages/failed-to-find-server-action`\n )\n}\n\nconst $ACTION_ = '$ACTION_'\nconst $ACTION_REF_ = '$ACTION_REF_'\nconst $ACTION_ID_ = '$ACTION_ID_'\nconst ACTION_ID_EXPECTED_LENGTH = 42\n\n/**\n * This function mirrors logic inside React's decodeAction and should be kept in sync with that.\n * It pre-parses the FormData to ensure that any action IDs referred to are actual action IDs for\n * this Next.js application.\n */\nfunction areAllActionIdsValid(\n mpaFormData: FormData,\n serverModuleMap: ServerModuleMap\n): boolean {\n let hasAtLeastOneAction = false\n // Before we attempt to decode the payload for a possible MPA action, assert that all\n // action IDs are valid IDs. If not we should disregard the payload\n for (let key of mpaFormData.keys()) {\n if (!key.startsWith($ACTION_)) {\n // not a relevant field\n continue\n }\n\n if (key.startsWith($ACTION_ID_)) {\n // No Bound args case\n if (isInvalidActionIdFieldName(key, serverModuleMap)) {\n return false\n }\n\n hasAtLeastOneAction = true\n } else if (key.startsWith($ACTION_REF_)) {\n // Bound args case\n const actionDescriptorField =\n $ACTION_ + key.slice($ACTION_REF_.length) + ':0'\n const actionFields = mpaFormData.getAll(actionDescriptorField)\n if (actionFields.length !== 1) {\n return false\n }\n const actionField = actionFields[0]\n if (typeof actionField !== 'string') {\n return false\n }\n\n if (isInvalidStringActionDescriptor(actionField, serverModuleMap)) {\n return false\n }\n hasAtLeastOneAction = true\n }\n }\n return hasAtLeastOneAction\n}\n\nconst ACTION_DESCRIPTOR_ID_PREFIX = '{\"id\":\"'\nfunction isInvalidStringActionDescriptor(\n actionDescriptor: string,\n serverModuleMap: 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Save
cmd:
run