/opt/canhelp/node_modules/next/dist/esm/server/lib
Edit: /opt/canhelp/node_modules/next/dist/esm/server/lib/clone-response.js.map (4441B)
{"version":3,"sources":["../../../src/server/lib/clone-response.ts"],"sourcesContent":["const noop = () => {}\n\nlet registry: FinalizationRegistry
> | undefined\n\nif (globalThis.FinalizationRegistry) {\n registry = new FinalizationRegistry((weakRef: WeakRef) => {\n const stream = weakRef.deref()\n if (stream && !stream.locked) {\n stream.cancel('Response object has been garbage collected').then(noop)\n }\n })\n}\n\n/**\n * Clones a response by teeing the body so we can return two independent\n * ReadableStreams from it. This avoids the bug in the undici library around\n * response cloning.\n *\n * After cloning, the original response's body will be consumed and closed.\n *\n * @see https://github.com/vercel/next.js/pull/73274\n *\n * @param original - The original response to clone.\n * @returns A tuple containing two independent clones of the original response.\n */\nexport function cloneResponse(original: Response): [Response, Response] {\n // If the response has no body, then we can just return the original response\n // twice because it's immutable.\n if (!original.body) {\n return [original, original]\n }\n\n const [body1, body2] = original.body.tee()\n\n const cloned1 = new Response(body1, {\n status: original.status,\n statusText: original.statusText,\n headers: original.headers,\n })\n\n Object.defineProperty(cloned1, 'url', {\n value: original.url,\n // How the original response.url behaves\n configurable: true,\n enumerable: true,\n writable: false,\n })\n\n // The Fetch Standard allows users to skip consuming the response body by\n // relying on garbage collection to release connection resources.\n // https://github.com/nodejs/undici?tab=readme-ov-file#garbage-collection\n //\n // To cancel the stream you then need to cancel both resulting branches.\n // Teeing a stream will generally lock it for the duration, preventing other\n // readers from locking it.\n // https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream/tee\n\n // cloned2 is stored in a react cache and cloned for subsequent requests.\n // It is the original request, and is is garbage collected by a\n // FinalizationRegistry in Undici, but since we're tee-ing the stream\n // ourselves, we need to cancel clone1's stream (the response returned from\n // our dedupe fetch) when clone1 is reclaimed, otherwise we leak memory.\n if (registry && cloned1.body) {\n registry.register(cloned1, new WeakRef(cloned1.body))\n }\n\n const cloned2 = new Response(body2, {\n status: original.status,\n statusText: original.statusText,\n headers: original.headers,\n })\n\n Object.defineProperty(cloned2, 'url', {\n value: original.url,\n // How the original response.url behaves\n configurable: true,\n enumerable: true,\n writable: false,\n })\n\n return [cloned1, cloned2]\n}\n"],"names":["noop","registry","globalThis","FinalizationRegistry","weakRef","stream","deref","locked","cancel","then","cloneResponse","original","body","body1","body2","tee","cloned1","Response","status","statusText","headers","Object","defineProperty","value","url","configurable","enumerable","writable","register","WeakRef","cloned2"],"mappings":"AAAA,MAAMA,OAAO,KAAO;AAEpB,IAAIC;AAEJ,IAAIC,WAAWC,oBAAoB,EAAE;IACnCF,WAAW,IAAIE,qBAAqB,CAACC;QACnC,MAAMC,SAASD,QAAQE,KAAK;QAC5B,IAAID,UAAU,CAACA,OAAOE,MAAM,EAAE;YAC5BF,OAAOG,MAAM,CAAC,8CAA8CC,IAAI,CAACT;QACnE;IACF;AACF;AAEA;;;;;;;;;;;CAWC,GACD,OAAO,SAASU,cAAcC,QAAkB;IAC9C,6EAA6E;IAC7E,gCAAgC;IAChC,IAAI,CAACA,SAASC,IAAI,EAAE;QAClB,OAAO;YAACD;YAAUA;SAAS;IAC7B;IAEA,MAAM,CAACE,OAAOC,MAAM,GAAGH,SAASC,IAAI,CAACG,GAAG;IAExC,MAAMC,UAAU,IAAIC,SAASJ,OAAO;QAClCK,QAAQP,SAASO,MAAM;QACvBC,YAAYR,SAASQ,UAAU;QAC/BC,SAAST,SAASS,OAAO;IAC3B;IAEAC,OAAOC,cAAc,CAACN,SAAS,OAAO;QACpCO,OAAOZ,SAASa,GAAG;QACnB,wCAAwC;QACxCC,cAAc;QACdC,YAAY;QACZC,UAAU;IACZ;IAEA,yEAAyE;IACzE,iEAAiE;IACjE,yEAAyE;IACzE,EAAE;IACF,wEAAwE;IACxE,4EAA4E;IAC5E,2BAA2B;IAC3B,sEAAsE;IAEtE,yEAAyE;IACzE,+DAA+D;IAC/D,qEAAqE;IACrE,2EAA2E;IAC3E,wEAAwE;IACxE,IAAI1B,YAAYe,QAAQJ,IAAI,EAAE;QAC5BX,SAAS2B,QAAQ,CAACZ,SAAS,IAAIa,QAAQb,QAAQJ,IAAI;IACrD;IAEA,MAAMkB,UAAU,IAAIb,SAASH,OAAO;QAClCI,QAAQP,SAASO,MAAM;QACvBC,YAAYR,SAASQ,UAAU;QAC/BC,SAAST,SAASS,OAAO;IAC3B;IAEAC,OAAOC,cAAc,CAACQ,SAAS,OAAO;QACpCP,OAAOZ,SAASa,GAAG;QACnB,wCAAwC;QACxCC,cAAc;QACdC,YAAY;QACZC,UAAU;IACZ;IAEA,OAAO;QAACX;QAASc;KAAQ;AAC3B","ignoreList":[0]}