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middleware */\n opts: ReactStreamOptions | Middleware[] = [],\n) {\n const useMiddleware = Array.isArray(opts); // for backwards compat\n const options: ReactStreamOptions = !Array.isArray(opts) ? opts : {};\n const { api, getInitialProps } = options;\n\n if (typeof document !== \"undefined\" && module) {\n const props = window.__data;\n hydrateRoot(document, );\n }\n\n return async function handler(request: Request): Promise {\n const main = reactStream(Component, module);\n const middleware: Middleware[] = [\n parseURL,\n parseHeaders,\n // DEPRECATED (for backwards compat)\n options.robots && robots(options.robots),\n options.api && deprecatedCustomAPI(options.api),\n options.getInitialProps && deprecatedGetInitiaProps(options.getInitialProps),\n // New custom middleware\n ...(useMiddleware ? opts.slice() : []),\n main,\n ].filter(Boolean);\n\n let res: Response = new Response();\n const req: DataRequest = Object.assign(request.clone(), { data: {} });\n req.data = {};\n\n const next = async (nextRes?: Response): Promise => {\n const fn = middleware.shift();\n if (nextRes) res = nextRes;\n if (!fn) return main(req, res);\n return fn(req, res, next);\n };\n return next();\n };\n}\n\nexport default render;\n\n// main react response handler\nconst reactStream = (\n Component: React.ComponentType,\n module: string | false,\n): Middleware =>\n async function(req: DataRequest, res: Response): Promise {\n const { renderToReadableStream } = await import(\"https://esm.sh/react-dom@18.3.1/server\");\n\n const stream = await renderToReadableStream(\n ,\n module\n ? {\n bootstrapModules: [module],\n bootstrapScriptContent: `window.__data=${JSON.stringify(req.data)}`,\n }\n : {},\n );\n const headers = res.headers;\n headers.set(\"Content-Type\", \"text/html\");\n\n console.log(\"react\", res.status);\n return new Response(stream, {\n headers,\n status: res.status,\n statusText: res.statusText,\n });\n };\n\n// default middleware\nconst parseURL: Middleware = async (req, res, next) => {\n const url = new URL(req.url);\n const { pathname, search } = url;\n req.data.url = url;\n req.data.pathname = pathname;\n req.data.search = search;\n req.data.searchParams = Object.fromEntries(req.data.url.searchParams);\n return next();\n};\n\nconst parseHeaders: Middleware = async (req, res, next) => {\n req.data.headers = req.headers;\n req.data.cookie = req.headers.get(\"cookie\");\n return next();\n};\n\n/** respond to /robots.txt with a custom string */\nexport const robots = (txt: string): Middleware => async (req, res, next) => {\n const url = new URL(req.url);\n if (txt && url.pathname === \"/robots.txt\") {\n return new Response(txt, { headers: { \"Content-Type\": \"text/plain\" } });\n }\n return next();\n};\n\n// DEPRECATED\n// DEPRECATE (for backwards compat)\nconst deprecatedCustomAPI = (api?: RequestHandler): Middleware => async (req, res, next) => {\n if (!api) return next();\n if (req.method === \"GET\") return next();\n return api(req);\n};\nconst 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