// this must come first as it includes require hooks
// This is required before other imports to ensure the require hook is setup.
import "../node-environment";
import "../require-hook";
import url from "url";
import path from "path";
import loadConfig from "../config";
import { serveStatic } from "../serve-static";
import setupDebug from "next/dist/compiled/debug";
import { DecodeError } from "../../shared/lib/utils";
import { findPagesDir } from "../../lib/find-pages-dir";
import { setupFsCheck } from "./router-utils/filesystem";
import { proxyRequest } from "./router-utils/proxy-request";
import { isAbortError, pipeToNodeResponse } from "../pipe-readable";
import { getResolveRoutes } from "./router-utils/resolve-routes";
import { addRequestMeta, getRequestMeta } from "../request-meta";
import { pathHasPrefix } from "../../shared/lib/router/utils/path-has-prefix";
import { removePathPrefix } from "../../shared/lib/router/utils/remove-path-prefix";
import setupCompression from "next/dist/compiled/compression";
import { NoFallbackError } from "../base-server";
import { signalFromNodeResponse } from "../web/spec-extension/adapters/next-request";
import { isPostpone } from "./router-utils/is-postpone";
import { parseUrl as parseUrlUtil } from "../../shared/lib/router/utils/parse-url";
import { PHASE_PRODUCTION_SERVER, PHASE_DEVELOPMENT_SERVER, UNDERSCORE_NOT_FOUND_ROUTE } from "../../shared/lib/constants";
import { RedirectStatusCode } from "../../client/components/redirect-status-code";
import { DevBundlerService } from "./dev-bundler-service";
import { trace } from "../../trace";
import { ensureLeadingSlash } from "../../shared/lib/page-path/ensure-leading-slash";
import { getNextPathnameInfo } from "../../shared/lib/router/utils/get-next-pathname-info";
import { getHostname } from "../../shared/lib/get-hostname";
import { detectDomainLocale } from "../../shared/lib/i18n/detect-domain-locale";
import { normalizedAssetPrefix } from "../../shared/lib/normalized-asset-prefix";
import { filterInternalHeaders } from "./server-ipc/utils";
import { blockCrossSite } from "./router-utils/block-cross-site";
const debug = setupDebug("next:router-server:main");
const isNextFont = (pathname)=>pathname && /\/media\/[^/]+\.(woff|woff2|eot|ttf|otf)$/.test(pathname);
const requestHandlers = {};
export async function initialize(opts) {
    if (!process.env.NODE_ENV) {
        // @ts-ignore not readonly
        process.env.NODE_ENV = opts.dev ? "development" : "production";
    }
    const config = await loadConfig(opts.dev ? PHASE_DEVELOPMENT_SERVER : PHASE_PRODUCTION_SERVER, opts.dir, {
        silent: false
    });
    let compress;
    if ((config == null ? void 0 : config.compress) !== false) {
        compress = setupCompression();
    }
    const fsChecker = await setupFsCheck({
        dev: opts.dev,
        dir: opts.dir,
        config,
        minimalMode: opts.minimalMode
    });
    const renderServer = {};
    let developmentBundler;
    let devBundlerService;
    if (opts.dev) {
        const { Telemetry } = require("../../telemetry/storage");
        const telemetry = new Telemetry({
            distDir: path.join(opts.dir, config.distDir)
        });
        const { pagesDir, appDir } = findPagesDir(opts.dir);
        const { setupDevBundler } = require("./router-utils/setup-dev-bundler");
        const setupDevBundlerSpan = opts.startServerSpan ? opts.startServerSpan.traceChild("setup-dev-bundler") : trace("setup-dev-bundler");
        developmentBundler = await setupDevBundlerSpan.traceAsyncFn(()=>setupDevBundler({
                // Passed here but the initialization of this object happens below, doing the initialization before the setupDev call breaks.
                renderServer,
                appDir,
                pagesDir,
                telemetry,
                fsChecker,
                dir: opts.dir,
                nextConfig: config,
                isCustomServer: opts.customServer,
                turbo: !!process.env.TURBOPACK,
                port: opts.port
            }));
        devBundlerService = new DevBundlerService(developmentBundler, // The request handler is assigned below, this allows us to create a lazy
        // reference to it.
        (req, res)=>{
            return requestHandlers[opts.dir](req, res);
        });
    }
    renderServer.instance = require("./render-server");
    const requestHandlerImpl = async (req, res)=>{
        // internal headers should not be honored by the request handler
        if (!process.env.NEXT_PRIVATE_TEST_HEADERS) {
            filterInternalHeaders(req.headers);
        }
        if (!opts.minimalMode && config.i18n && config.i18n.localeDetection !== false) {
            var _this;
            const urlParts = (req.url || "").split("?", 1);
            let urlNoQuery = urlParts[0] || "";
            if (config.basePath) {
                urlNoQuery = removePathPrefix(urlNoQuery, config.basePath);
            }
            const pathnameInfo = getNextPathnameInfo(urlNoQuery, {
                nextConfig: config
            });
            const domainLocale = detectDomainLocale(config.i18n.domains, getHostname({
                hostname: urlNoQuery
            }, req.headers));
            const defaultLocale = (domainLocale == null ? void 0 : domainLocale.defaultLocale) || config.i18n.defaultLocale;
            const { getLocaleRedirect } = require("../../shared/lib/i18n/get-locale-redirect");
            const parsedUrl = parseUrlUtil((_this = req.url || "") == null ? void 0 : _this.replace(/^\/+/, "/"));
            const redirect = getLocaleRedirect({
                defaultLocale,
                domainLocale,
                headers: req.headers,
                nextConfig: config,
                pathLocale: pathnameInfo.locale,
                urlParsed: {
                    ...parsedUrl,
                    pathname: pathnameInfo.locale ? `/${pathnameInfo.locale}${urlNoQuery}` : urlNoQuery
                }
            });
            if (redirect) {
                res.setHeader("Location", redirect);
                res.statusCode = RedirectStatusCode.TemporaryRedirect;
                res.end(redirect);
                return;
            }
        }
        if (compress) {
            // @ts-expect-error not express req/res
            compress(req, res, ()=>{});
        }
        req.on("error", (_err)=>{
        // TODO: log socket errors?
        });
        res.on("error", (_err)=>{
        // TODO: log socket errors?
        });
        const invokedOutputs = new Set();
        async function invokeRender(parsedUrl, invokePath, handleIndex, additionalRequestMeta) {
            var _fsChecker_getMiddlewareMatchers;
            // invokeRender expects /api routes to not be locale prefixed
            // so normalize here before continuing
            if (config.i18n && removePathPrefix(invokePath, config.basePath).startsWith(`/${parsedUrl.query.__nextLocale}/api`)) {
                invokePath = fsChecker.handleLocale(removePathPrefix(invokePath, config.basePath)).pathname;
            }
            if (req.headers["x-nextjs-data"] && ((_fsChecker_getMiddlewareMatchers = fsChecker.getMiddlewareMatchers()) == null ? void 0 : _fsChecker_getMiddlewareMatchers.length) && removePathPrefix(invokePath, config.basePath) === "/404") {
                res.setHeader("x-nextjs-matched-path", parsedUrl.pathname || "");
                res.statusCode = 404;
                res.setHeader("content-type", "application/json");
                res.end("{}");
                return null;
            }
            if (!handlers) {
                throw new Error("Failed to initialize render server");
            }
            addRequestMeta(req, "invokePath", invokePath);
            addRequestMeta(req, "invokeQuery", parsedUrl.query);
            addRequestMeta(req, "middlewareInvoke", false);
            for(const key in additionalRequestMeta || {}){
                addRequestMeta(req, key, additionalRequestMeta[key]);
            }
            debug("invokeRender", req.url, req.headers);
            try {
                var _renderServer_instance;
                const initResult = await (renderServer == null ? void 0 : (_renderServer_instance = renderServer.instance) == null ? void 0 : _renderServer_instance.initialize(renderServerOpts));
                try {
                    await (initResult == null ? void 0 : initResult.requestHandler(req, res));
                } catch (err) {
                    if (err instanceof NoFallbackError) {
                        // eslint-disable-next-line
                        await handleRequest(handleIndex + 1);
                        return;
                    }
                    throw err;
                }
                return;
            } catch (e) {
                // If the client aborts before we can receive a response object (when
                // the headers are flushed), then we can early exit without further
                // processing.
                if (isAbortError(e)) {
                    return;
                }
                throw e;
            }
        }
        const handleRequest = async (handleIndex)=>{
            if (handleIndex > 5) {
                throw new Error(`Attempted to handle request too many times ${req.url}`);
            }
            // handle hot-reloader first
            if (developmentBundler) {
                if (blockCrossSite(req, res, config.allowedDevOrigins, opts.hostname)) {
                    return;
                }
                const origUrl = req.url || "/";
                if (config.basePath && pathHasPrefix(origUrl, config.basePath)) {
                    req.url = removePathPrefix(origUrl, config.basePath);
                }
                const parsedUrl = url.parse(req.url || "/");
                const hotReloaderResult = await developmentBundler.hotReloader.run(req, res, parsedUrl);
                if (hotReloaderResult.finished) {
                    return hotReloaderResult;
                }
                req.url = origUrl;
            }
            const { finished, parsedUrl, statusCode, resHeaders, bodyStream, matchedOutput } = await resolveRoutes({
                req,
                res,
                isUpgradeReq: false,
                signal: signalFromNodeResponse(res),
                invokedOutputs
            });
            if (res.closed || res.finished) {
                return;
            }
            if (developmentBundler && (matchedOutput == null ? void 0 : matchedOutput.type) === "devVirtualFsItem") {
                const origUrl = req.url || "/";
                if (config.basePath && pathHasPrefix(origUrl, config.basePath)) {
                    req.url = removePathPrefix(origUrl, config.basePath);
                }
                if (resHeaders) {
                    for (const key of Object.keys(resHeaders)){
                        res.setHeader(key, resHeaders[key]);
                    }
                }
                const result = await developmentBundler.requestHandler(req, res);
                if (result.finished) {
                    return;
                }
                // TODO: throw invariant if we resolved to this but it wasn't handled?
                req.url = origUrl;
            }
            debug("requestHandler!", req.url, {
                matchedOutput,
                statusCode,
                resHeaders,
                bodyStream: !!bodyStream,
                parsedUrl: {
                    pathname: parsedUrl.pathname,
                    query: parsedUrl.query
                },
                finished
            });
            // apply any response headers from routing
            for (const key of Object.keys(resHeaders || {})){
                res.setHeader(key, resHeaders[key]);
            }
            // handle redirect
            if (!bodyStream && statusCode && statusCode > 300 && statusCode < 400) {
                const destination = url.format(parsedUrl);
                res.statusCode = statusCode;
                res.setHeader("location", destination);
                if (statusCode === RedirectStatusCode.PermanentRedirect) {
                    res.setHeader("Refresh", `0;url=${destination}`);
                }
                return res.end(destination);
            }
            // handle middleware body response
            if (bodyStream) {
                res.statusCode = statusCode || 200;
                return await pipeToNodeResponse(bodyStream, res);
            }
            if (finished && parsedUrl.protocol) {
                var _getRequestMeta;
                return await proxyRequest(req, res, parsedUrl, undefined, (_getRequestMeta = getRequestMeta(req, "clonableBody")) == null ? void 0 : _getRequestMeta.cloneBodyStream(), config.experimental.proxyTimeout);
            }
            if ((matchedOutput == null ? void 0 : matchedOutput.fsPath) && matchedOutput.itemPath) {
                if (opts.dev && (fsChecker.appFiles.has(matchedOutput.itemPath) || fsChecker.pageFiles.has(matchedOutput.itemPath))) {
                    res.statusCode = 500;
                    await invokeRender(parsedUrl, "/_error", handleIndex, {
                        invokeStatus: 500,
                        invokeError: new Error(`A conflicting public file and page file was found for path ${matchedOutput.itemPath} https://nextjs.org/docs/messages/conflicting-public-file-page`)
                    });
                    return;
                }
                if (!res.getHeader("cache-control") && matchedOutput.type === "nextStaticFolder") {
                    if (opts.dev && !isNextFont(parsedUrl.pathname)) {
                        res.setHeader("Cache-Control", "no-store, must-revalidate");
                    } else {
                        res.setHeader("Cache-Control", "public, max-age=31536000, immutable");
                    }
                }
                if (!(req.method === "GET" || req.method === "HEAD")) {
                    res.setHeader("Allow", [
                        "GET",
                        "HEAD"
                    ]);
                    res.statusCode = 405;
                    return await invokeRender(url.parse("/405", true), "/405", handleIndex, {
                        invokeStatus: 405
                    });
                }
                try {
                    return await serveStatic(req, res, matchedOutput.itemPath, {
                        root: matchedOutput.itemsRoot,
                        // Ensures that etags are not generated for static files when disabled.
                        etag: config.generateEtags
                    });
                } catch (err) {
                    /**
           * Hardcoded every possible error status code that could be thrown by "serveStatic" method
           * This is done by searching "this.error" inside "send" module's source code:
           * https://github.com/pillarjs/send/blob/master/index.js
           * https://github.com/pillarjs/send/blob/develop/index.js
           */ const POSSIBLE_ERROR_CODE_FROM_SERVE_STATIC = new Set([
                        // send module will throw 500 when header is already sent or fs.stat error happens
                        // https://github.com/pillarjs/send/blob/53f0ab476145670a9bdd3dc722ab2fdc8d358fc6/index.js#L392
                        // Note: we will use Next.js built-in 500 page to handle 500 errors
                        // 500,
                        // send module will throw 404 when file is missing
                        // https://github.com/pillarjs/send/blob/53f0ab476145670a9bdd3dc722ab2fdc8d358fc6/index.js#L421
                        // Note: we will use Next.js built-in 404 page to handle 404 errors
                        // 404,
                        // send module will throw 403 when redirecting to a directory without enabling directory listing
                        // https://github.com/pillarjs/send/blob/53f0ab476145670a9bdd3dc722ab2fdc8d358fc6/index.js#L484
                        // Note: Next.js throws a different error (without status code) for directory listing
                        // 403,
                        // send module will throw 400 when fails to normalize the path
                        // https://github.com/pillarjs/send/blob/53f0ab476145670a9bdd3dc722ab2fdc8d358fc6/index.js#L520
                        400,
                        // send module will throw 412 with conditional GET request
                        // https://github.com/pillarjs/send/blob/53f0ab476145670a9bdd3dc722ab2fdc8d358fc6/index.js#L632
                        412,
                        // send module will throw 416 when range is not satisfiable
                        // https://github.com/pillarjs/send/blob/53f0ab476145670a9bdd3dc722ab2fdc8d358fc6/index.js#L669
                        416
                    ]);
                    let validErrorStatus = POSSIBLE_ERROR_CODE_FROM_SERVE_STATIC.has(err.statusCode);
                    // normalize non-allowed status codes
                    if (!validErrorStatus) {
                        err.statusCode = 400;
                    }
                    if (typeof err.statusCode === "number") {
                        const invokePath = `/${err.statusCode}`;
                        const invokeStatus = err.statusCode;
                        res.statusCode = err.statusCode;
                        return await invokeRender(url.parse(invokePath, true), invokePath, handleIndex, {
                            invokeStatus
                        });
                    }
                    throw err;
                }
            }
            if (matchedOutput) {
                invokedOutputs.add(matchedOutput.itemPath);
                return await invokeRender(parsedUrl, parsedUrl.pathname || "/", handleIndex, {
                    invokeOutput: matchedOutput.itemPath
                });
            }
            // 404 case
            res.setHeader("Cache-Control", "private, no-cache, no-store, max-age=0, must-revalidate");
            // Short-circuit favicon.ico serving so that the 404 page doesn't get built as favicon is requested by the browser when loading any route.
            if (opts.dev && !matchedOutput && parsedUrl.pathname === "/favicon.ico") {
                res.statusCode = 404;
                res.end("");
                return null;
            }
            const appNotFound = opts.dev ? developmentBundler == null ? void 0 : developmentBundler.serverFields.hasAppNotFound : await fsChecker.getItem(UNDERSCORE_NOT_FOUND_ROUTE);
            res.statusCode = 404;
            if (appNotFound) {
                return await invokeRender(parsedUrl, UNDERSCORE_NOT_FOUND_ROUTE, handleIndex, {
                    invokeStatus: 404
                });
            }
            await invokeRender(parsedUrl, "/404", handleIndex, {
                invokeStatus: 404
            });
        };
        try {
            await handleRequest(0);
        } catch (err) {
            try {
                let invokePath = "/500";
                let invokeStatus = "500";
                if (err instanceof DecodeError) {
                    invokePath = "/400";
                    invokeStatus = "400";
                } else {
                    console.error(err);
                }
                res.statusCode = Number(invokeStatus);
                return await invokeRender(url.parse(invokePath, true), invokePath, 0, {
                    invokeStatus: res.statusCode
                });
            } catch (err2) {
                console.error(err2);
            }
            res.statusCode = 500;
            res.end("Internal Server Error");
        }
    };
    let requestHandler = requestHandlerImpl;
    if (config.experimental.testProxy) {
        // Intercept fetch and other testmode apis.
        const { wrapRequestHandlerWorker, interceptTestApis } = require("next/dist/experimental/testmode/server");
        requestHandler = wrapRequestHandlerWorker(requestHandler);
        interceptTestApis();
    }
    requestHandlers[opts.dir] = requestHandler;
    const renderServerOpts = {
        port: opts.port,
        dir: opts.dir,
        hostname: opts.hostname,
        minimalMode: opts.minimalMode,
        dev: !!opts.dev,
        server: opts.server,
        isNodeDebugging: !!opts.isNodeDebugging,
        serverFields: (developmentBundler == null ? void 0 : developmentBundler.serverFields) || {},
        experimentalTestProxy: !!config.experimental.testProxy,
        experimentalHttpsServer: !!opts.experimentalHttpsServer,
        bundlerService: devBundlerService,
        startServerSpan: opts.startServerSpan
    };
    renderServerOpts.serverFields.routerServerHandler = requestHandlerImpl;
    // pre-initialize workers
    const handlers = await renderServer.instance.initialize(renderServerOpts);
    const logError = async (type, err)=>{
        if (isPostpone(err)) {
            // React postpones that are unhandled might end up logged here but they're
            // not really errors. They're just part of rendering.
            return;
        }
        await (developmentBundler == null ? void 0 : developmentBundler.logErrorWithOriginalStack(err, type));
    };
    process.on("uncaughtException", logError.bind(null, "uncaughtException"));
    process.on("unhandledRejection", logError.bind(null, "unhandledRejection"));
    const resolveRoutes = getResolveRoutes(fsChecker, config, opts, renderServer.instance, renderServerOpts, developmentBundler == null ? void 0 : developmentBundler.ensureMiddleware);
    const upgradeHandler = async (req, socket, head)=>{
        try {
            req.on("error", (_err)=>{
            // TODO: log socket errors?
            // console.error(_err);
            });
            socket.on("error", (_err)=>{
            // TODO: log socket errors?
            // console.error(_err);
            });
            if (opts.dev && developmentBundler && req.url) {
                if (blockCrossSite(req, socket, config.allowedDevOrigins, opts.hostname)) {
                    return;
                }
                const { basePath, assetPrefix } = config;
                let hmrPrefix = basePath;
                // assetPrefix overrides basePath for HMR path
                if (assetPrefix) {
                    hmrPrefix = normalizedAssetPrefix(assetPrefix);
                    if (URL.canParse(hmrPrefix)) {
                        // remove trailing slash from pathname
                        // return empty string if pathname is '/'
                        // to avoid conflicts with '/_next' below
                        hmrPrefix = new URL(hmrPrefix).pathname.replace(/\/$/, "");
                    }
                }
                const isHMRRequest = req.url.startsWith(ensureLeadingSlash(`${hmrPrefix}/_next/webpack-hmr`));
                // only handle HMR requests if the basePath in the request
                // matches the basePath for the handler responding to the request
                if (isHMRRequest) {
                    return developmentBundler.hotReloader.onHMR(req, socket, head);
                }
            }
            const { matchedOutput, parsedUrl } = await resolveRoutes({
                req,
                res: socket,
                isUpgradeReq: true,
                signal: signalFromNodeResponse(socket)
            });
            // TODO: allow upgrade requests to pages/app paths?
            // this was not previously supported
            if (matchedOutput) {
                return socket.end();
            }
            if (parsedUrl.protocol) {
                return await proxyRequest(req, socket, parsedUrl, head);
            }
        // If there's no matched output, we don't handle the request as user's
        // custom WS server may be listening on the same path.
        } catch (err) {
            console.error("Error handling upgrade request", err);
            socket.end();
        }
    };
    return [
        requestHandler,
        upgradeHandler,
        handlers.app
    ];
}

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