import { AppRenderSpan, NextNodeServerSpan } from './trace/constants';
import { getTracer, SpanKind } from './trace/tracer';
import { CACHE_ONE_YEAR, NEXT_CACHE_IMPLICIT_TAG_ID, NEXT_CACHE_TAG_MAX_ITEMS, NEXT_CACHE_TAG_MAX_LENGTH } from '../../lib/constants';
import * as Log from '../../build/output/log';
import { markCurrentScopeAsDynamic } from '../app-render/dynamic-rendering';
import { createDedupeFetch } from './dedupe-fetch';
const isEdgeRuntime = process.env.NEXT_RUNTIME === 'edge';
function isPatchedFetch(fetch) {
    return '__nextPatched' in fetch && fetch.__nextPatched === true;
}
export function validateRevalidate(revalidateVal, route) {
    try {
        let normalizedRevalidate = undefined;
        if (revalidateVal === false) {
            normalizedRevalidate = revalidateVal;
        } else if (typeof revalidateVal === 'number' && !isNaN(revalidateVal) && revalidateVal > -1) {
            normalizedRevalidate = revalidateVal;
        } else if (typeof revalidateVal !== 'undefined') {
            throw new Error(`Invalid revalidate value "${revalidateVal}" on "${route}", must be a non-negative number or "false"`);
        }
        return normalizedRevalidate;
    } catch (err) {
        // handle client component error from attempting to check revalidate value
        if (err instanceof Error && err.message.includes('Invalid revalidate')) {
            throw err;
        }
        return undefined;
    }
}
export function validateTags(tags, description) {
    const validTags = [];
    const invalidTags = [];
    for(let i = 0; i < tags.length; i++){
        const tag = tags[i];
        if (typeof tag !== 'string') {
            invalidTags.push({
                tag,
                reason: 'invalid type, must be a string'
            });
        } else if (tag.length > NEXT_CACHE_TAG_MAX_LENGTH) {
            invalidTags.push({
                tag,
                reason: `exceeded max length of ${NEXT_CACHE_TAG_MAX_LENGTH}`
            });
        } else {
            validTags.push(tag);
        }
        if (validTags.length > NEXT_CACHE_TAG_MAX_ITEMS) {
            console.warn(`Warning: exceeded max tag count for ${description}, dropped tags:`, tags.slice(i).join(', '));
            break;
        }
    }
    if (invalidTags.length > 0) {
        console.warn(`Warning: invalid tags passed to ${description}: `);
        for (const { tag, reason } of invalidTags){
            console.log(`tag: "${tag}" ${reason}`);
        }
    }
    return validTags;
}
const getDerivedTags = (pathname)=>{
    const derivedTags = [
        `/layout`
    ];
    // we automatically add the current path segments as tags
    // for revalidatePath handling
    if (pathname.startsWith('/')) {
        const pathnameParts = pathname.split('/');
        for(let i = 1; i < pathnameParts.length + 1; i++){
            let curPathname = pathnameParts.slice(0, i).join('/');
            if (curPathname) {
                // all derived tags other than the page are layout tags
                if (!curPathname.endsWith('/page') && !curPathname.endsWith('/route')) {
                    curPathname = `${curPathname}${!curPathname.endsWith('/') ? '/' : ''}layout`;
                }
                derivedTags.push(curPathname);
            }
        }
    }
    return derivedTags;
};
export function addImplicitTags(staticGenerationStore, requestStore) {
    const newTags = [];
    const { page } = staticGenerationStore;
    // Ini the tags array if it doesn't exist.
    staticGenerationStore.tags ??= [];
    // Add the derived tags from the page.
    const derivedTags = getDerivedTags(page);
    for (let tag of derivedTags){
        var _staticGenerationStore_tags;
        tag = `${NEXT_CACHE_IMPLICIT_TAG_ID}${tag}`;
        if (!((_staticGenerationStore_tags = staticGenerationStore.tags) == null ? void 0 : _staticGenerationStore_tags.includes(tag))) {
            staticGenerationStore.tags.push(tag);
        }
        newTags.push(tag);
    }
    // Add the tags from the pathname.
    if (requestStore == null ? void 0 : requestStore.url.pathname) {
        var _staticGenerationStore_tags1;
        const tag = `${NEXT_CACHE_IMPLICIT_TAG_ID}${requestStore.url.pathname}`;
        if (!((_staticGenerationStore_tags1 = staticGenerationStore.tags) == null ? void 0 : _staticGenerationStore_tags1.includes(tag))) {
            staticGenerationStore.tags.push(tag);
        }
        newTags.push(tag);
    }
    return newTags;
}
function trackFetchMetric(staticGenerationStore, ctx) {
    var _staticGenerationStore_requestEndedState;
    if (!staticGenerationStore || ((_staticGenerationStore_requestEndedState = staticGenerationStore.requestEndedState) == null ? void 0 : _staticGenerationStore_requestEndedState.ended) || process.env.NODE_ENV !== 'development') {
        return;
    }
    staticGenerationStore.fetchMetrics ??= [];
    const dedupeFields = [
        'url',
        'status',
        'method'
    ];
    // don't add metric if one already exists for the fetch
    if (staticGenerationStore.fetchMetrics.some((metric)=>dedupeFields.every((field)=>metric[field] === ctx[field]))) {
        return;
    }
    staticGenerationStore.fetchMetrics.push({
        ...ctx,
        end: Date.now(),
        idx: staticGenerationStore.nextFetchId || 0
    });
    // only store top 10 metrics to avoid storing too many
    if (staticGenerationStore.fetchMetrics.length > 10) {
        // sort slowest first as these should be highlighted
        staticGenerationStore.fetchMetrics.sort((a, b)=>{
            const aDur = a.end - a.start;
            const bDur = b.end - b.start;
            if (aDur < bDur) {
                return 1;
            } else if (aDur > bDur) {
                return -1;
            }
            return 0;
        });
        // now grab top 10
        staticGenerationStore.fetchMetrics = staticGenerationStore.fetchMetrics.slice(0, 10);
    }
}
function createPatchedFetcher(originFetch, { staticGenerationAsyncStorage, requestAsyncStorage }) {
    // Create the patched fetch function. We don't set the type here, as it's
    // verified as the return value of this function.
    const patched = async (input, init)=>{
        var _init_method, _init_next;
        let url;
        try {
            url = new URL(input instanceof Request ? input.url : input);
            url.username = '';
            url.password = '';
        } catch  {
            // Error caused by malformed URL should be handled by native fetch
            url = undefined;
        }
        const fetchUrl = (url == null ? void 0 : url.href) ?? '';
        const fetchStart = Date.now();
        const method = (init == null ? void 0 : (_init_method = init.method) == null ? void 0 : _init_method.toUpperCase()) || 'GET';
        // Do create a new span trace for internal fetches in the
        // non-verbose mode.
        const isInternal = (init == null ? void 0 : (_init_next = init.next) == null ? void 0 : _init_next.internal) === true;
        const hideSpan = process.env.NEXT_OTEL_FETCH_DISABLED === '1';
        return getTracer().trace(isInternal ? NextNodeServerSpan.internalFetch : AppRenderSpan.fetch, {
            hideSpan,
            kind: SpanKind.CLIENT,
            spanName: [
                'fetch',
                method,
                fetchUrl
            ].filter(Boolean).join(' '),
            attributes: {
                'http.url': fetchUrl,
                'http.method': method,
                'net.peer.name': url == null ? void 0 : url.hostname,
                'net.peer.port': (url == null ? void 0 : url.port) || undefined
            }
        }, async ()=>{
            var _getRequestMeta;
            // If this is an internal fetch, we should not do any special treatment.
            if (isInternal) {
                return originFetch(input, init);
            }
            const staticGenerationStore = staticGenerationAsyncStorage.getStore();
            const requestStore = requestAsyncStorage.getStore();
            // If the staticGenerationStore is not available, we can't do any
            // special treatment of fetch, therefore fallback to the original
            // fetch implementation.
            if (!staticGenerationStore) {
                return originFetch(input, init);
            }
            // We should also fallback to the original fetch implementation if we
            // are in draft mode, it does not constitute a static generation.
            if (staticGenerationStore.isDraftMode) {
                return originFetch(input, init);
            }
            const isRequestInput = input && typeof input === 'object' && typeof input.method === 'string';
            const getRequestMeta = (field)=>{
                // If request input is present but init is not, retrieve from input first.
                const value = init == null ? void 0 : init[field];
                return value || (isRequestInput ? input[field] : null);
            };
            let finalRevalidate = undefined;
            const getNextField = (field)=>{
                var _init_next, _init_next1, _input_next;
                return typeof (init == null ? void 0 : (_init_next = init.next) == null ? void 0 : _init_next[field]) !== 'undefined' ? init == null ? void 0 : (_init_next1 = init.next) == null ? void 0 : _init_next1[field] : isRequestInput ? (_input_next = input.next) == null ? void 0 : _input_next[field] : undefined;
            };
            // RequestInit doesn't keep extra fields e.g. next so it's
            // only available if init is used separate
            let currentFetchRevalidate = getNextField('revalidate');
            const tags = validateTags(getNextField('tags') || [], `fetch ${input.toString()}`);
            if (Array.isArray(tags)) {
                if (!staticGenerationStore.tags) {
                    staticGenerationStore.tags = [];
                }
                for (const tag of tags){
                    if (!staticGenerationStore.tags.includes(tag)) {
                        staticGenerationStore.tags.push(tag);
                    }
                }
            }
            const implicitTags = addImplicitTags(staticGenerationStore, requestStore);
            const pageFetchCacheMode = staticGenerationStore.fetchCache;
            const isUsingNoStore = !!staticGenerationStore.isUnstableNoStore;
            let currentFetchCacheConfig = getRequestMeta('cache');
            let cacheReason = '';
            if (typeof currentFetchCacheConfig === 'string' && typeof currentFetchRevalidate !== 'undefined') {
                // when providing fetch with a Request input, it'll automatically set a cache value of 'default'
                // we only want to warn if the user is explicitly setting a cache value
                if (!(isRequestInput && currentFetchCacheConfig === 'default')) {
                    Log.warn(`fetch for ${fetchUrl} on ${staticGenerationStore.route} specified "cache: ${currentFetchCacheConfig}" and "revalidate: ${currentFetchRevalidate}", only one should be specified.`);
                }
                currentFetchCacheConfig = undefined;
            }
            if (currentFetchCacheConfig === 'force-cache') {
                currentFetchRevalidate = false;
            } else if (currentFetchCacheConfig === 'no-cache' || currentFetchCacheConfig === 'no-store' || pageFetchCacheMode === 'force-no-store' || pageFetchCacheMode === 'only-no-store' || // If no explicit fetch cache mode is set, but dynamic = `force-dynamic` is set,
            // we shouldn't consider caching the fetch. This is because the `dynamic` cache
            // is considered a "top-level" cache mode, whereas something like `fetchCache` is more
            // fine-grained. Top-level modes are responsible for setting reasonable defaults for the
            // other configurations.
            !pageFetchCacheMode && staticGenerationStore.forceDynamic) {
                currentFetchRevalidate = 0;
            }
            if (currentFetchCacheConfig === 'no-cache' || currentFetchCacheConfig === 'no-store') {
                cacheReason = `cache: ${currentFetchCacheConfig}`;
            }
            finalRevalidate = validateRevalidate(currentFetchRevalidate, staticGenerationStore.route);
            const _headers = getRequestMeta('headers');
            const initHeaders = typeof (_headers == null ? void 0 : _headers.get) === 'function' ? _headers : new Headers(_headers || {});
            const hasUnCacheableHeader = initHeaders.get('authorization') || initHeaders.get('cookie');
            const isUnCacheableMethod = ![
                'get',
                'head'
            ].includes(((_getRequestMeta = getRequestMeta('method')) == null ? void 0 : _getRequestMeta.toLowerCase()) || 'get');
            /**
         * We automatically disable fetch caching under the following conditions:
         * - Fetch cache configs are not set. Specifically:
         *    - A page fetch cache mode is not set (export const fetchCache=...)
         *    - A fetch cache mode is not set in the fetch call (fetch(url, { cache: ... }))
         *    - A fetch revalidate value is not set in the fetch call (fetch(url, { revalidate: ... }))
         * - OR the fetch comes after a configuration that triggered dynamic rendering (e.g., reading cookies())
         *   and the fetch was considered uncacheable (e.g., POST method or has authorization headers)
         */ const autoNoCache = // this condition is hit for null/undefined
            // eslint-disable-next-line eqeqeq
            pageFetchCacheMode == undefined && // eslint-disable-next-line eqeqeq
            currentFetchCacheConfig == undefined && // eslint-disable-next-line eqeqeq
            currentFetchRevalidate == undefined || (hasUnCacheableHeader || isUnCacheableMethod) && staticGenerationStore.revalidate === 0;
            switch(pageFetchCacheMode){
                case 'force-no-store':
                    {
                        cacheReason = 'fetchCache = force-no-store';
                        break;
                    }
                case 'only-no-store':
                    {
                        if (currentFetchCacheConfig === 'force-cache' || typeof finalRevalidate !== 'undefined' && (finalRevalidate === false || finalRevalidate > 0)) {
                            throw new Error(`cache: 'force-cache' used on fetch for ${fetchUrl} with 'export const fetchCache = 'only-no-store'`);
                        }
                        cacheReason = 'fetchCache = only-no-store';
                        break;
                    }
                case 'only-cache':
                    {
                        if (currentFetchCacheConfig === 'no-store') {
                            throw new Error(`cache: 'no-store' used on fetch for ${fetchUrl} with 'export const fetchCache = 'only-cache'`);
                        }
                        break;
                    }
                case 'force-cache':
                    {
                        if (typeof currentFetchRevalidate === 'undefined' || currentFetchRevalidate === 0) {
                            cacheReason = 'fetchCache = force-cache';
                            finalRevalidate = false;
                        }
                        break;
                    }
                default:
            }
            if (typeof finalRevalidate === 'undefined') {
                if (pageFetchCacheMode === 'default-cache' && !isUsingNoStore) {
                    finalRevalidate = false;
                    cacheReason = 'fetchCache = default-cache';
                } else if (pageFetchCacheMode === 'default-no-store') {
                    finalRevalidate = 0;
                    cacheReason = 'fetchCache = default-no-store';
                } else if (isUsingNoStore) {
                    finalRevalidate = 0;
                    cacheReason = 'noStore call';
                } else if (autoNoCache) {
                    finalRevalidate = 0;
                    cacheReason = 'auto no cache';
                } else {
                    // TODO: should we consider this case an invariant?
                    cacheReason = 'auto cache';
                    finalRevalidate = typeof staticGenerationStore.revalidate === 'boolean' || typeof staticGenerationStore.revalidate === 'undefined' ? false : staticGenerationStore.revalidate;
                }
            } else if (!cacheReason) {
                cacheReason = `revalidate: ${finalRevalidate}`;
            }
            if (// when force static is configured we don't bail from
            // `revalidate: 0` values
            !(staticGenerationStore.forceStatic && finalRevalidate === 0) && // we don't consider autoNoCache to switch to dynamic for ISR
            !autoNoCache && // If the revalidate value isn't currently set or the value is less
            // than the current revalidate value, we should update the revalidate
            // value.
            (typeof staticGenerationStore.revalidate === 'undefined' || typeof finalRevalidate === 'number' && (staticGenerationStore.revalidate === false || typeof staticGenerationStore.revalidate === 'number' && finalRevalidate < staticGenerationStore.revalidate))) {
                // If we were setting the revalidate value to 0, we should try to
                // postpone instead first.
                if (finalRevalidate === 0) {
                    markCurrentScopeAsDynamic(staticGenerationStore, `revalidate: 0 fetch ${input} ${staticGenerationStore.route}`);
                }
                staticGenerationStore.revalidate = finalRevalidate;
            }
            const isCacheableRevalidate = typeof finalRevalidate === 'number' && finalRevalidate > 0 || finalRevalidate === false;
            let cacheKey;
            if (staticGenerationStore.incrementalCache && (isCacheableRevalidate || (requestStore == null ? void 0 : requestStore.serverComponentsHmrCache))) {
                try {
                    cacheKey = await staticGenerationStore.incrementalCache.generateCacheKey(fetchUrl, isRequestInput ? input : init);
                } catch (err) {
                    console.error(`Failed to generate cache key for`, input);
                }
            }
            const fetchIdx = staticGenerationStore.nextFetchId ?? 1;
            staticGenerationStore.nextFetchId = fetchIdx + 1;
            const normalizedRevalidate = typeof finalRevalidate !== 'number' ? CACHE_ONE_YEAR : finalRevalidate;
            const doOriginalFetch = async (isStale, cacheReasonOverride)=>{
                const requestInputFields = [
                    'cache',
                    'credentials',
                    'headers',
                    'integrity',
                    'keepalive',
                    'method',
                    'mode',
                    'redirect',
                    'referrer',
                    'referrerPolicy',
                    'window',
                    'duplex',
                    // don't pass through signal when revalidating
                    ...isStale ? [] : [
                        'signal'
                    ]
                ];
                if (isRequestInput) {
                    const reqInput = input;
                    const reqOptions = {
                        body: reqInput._ogBody || reqInput.body
                    };
                    for (const field of requestInputFields){
                        // @ts-expect-error custom fields
                        reqOptions[field] = reqInput[field];
                    }
                    input = new Request(reqInput.url, reqOptions);
                } else if (init) {
                    const { _ogBody, body, signal, ...otherInput } = init;
                    init = {
                        ...otherInput,
                        body: _ogBody || body,
                        signal: isStale ? undefined : signal
                    };
                }
                // add metadata to init without editing the original
                const clonedInit = {
                    ...init,
                    next: {
                        ...init == null ? void 0 : init.next,
                        fetchType: 'origin',
                        fetchIdx
                    }
                };
                return originFetch(input, clonedInit).then(async (res)=>{
                    if (!isStale) {
                        trackFetchMetric(staticGenerationStore, {
                            start: fetchStart,
                            url: fetchUrl,
                            cacheReason: cacheReasonOverride || cacheReason,
                            cacheStatus: finalRevalidate === 0 || cacheReasonOverride ? 'skip' : 'miss',
                            status: res.status,
                            method: clonedInit.method || 'GET'
                        });
                    }
                    if (res.status === 200 && staticGenerationStore.incrementalCache && cacheKey && (isCacheableRevalidate || (requestStore == null ? void 0 : requestStore.serverComponentsHmrCache))) {
                        var _requestStore_serverComponentsHmrCache;
                        const bodyBuffer = Buffer.from(await res.arrayBuffer());
                        const cachedFetchData = {
                            headers: Object.fromEntries(res.headers.entries()),
                            body: bodyBuffer.toString('base64'),
                            status: res.status,
                            url: res.url
                        };
                        requestStore == null ? void 0 : (_requestStore_serverComponentsHmrCache = requestStore.serverComponentsHmrCache) == null ? void 0 : _requestStore_serverComponentsHmrCache.set(cacheKey, cachedFetchData);
                        if (isCacheableRevalidate) {
                            try {
                                await staticGenerationStore.incrementalCache.set(cacheKey, {
                                    kind: 'FETCH',
                                    data: cachedFetchData,
                                    revalidate: normalizedRevalidate
                                }, {
                                    fetchCache: true,
                                    revalidate: finalRevalidate,
                                    fetchUrl,
                                    fetchIdx,
                                    tags
                                });
                            } catch (err) {
                                console.warn(`Failed to set fetch cache`, input, err);
                            }
                        }
                        const response = new Response(bodyBuffer, {
                            headers: new Headers(res.headers),
                            status: res.status
                        });
                        Object.defineProperty(response, 'url', {
                            value: res.url
                        });
                        return response;
                    }
                    return res;
                });
            };
            let handleUnlock = ()=>Promise.resolve();
            let cacheReasonOverride;
            let isForegroundRevalidate = false;
            if (cacheKey && staticGenerationStore.incrementalCache) {
                let cachedFetchData;
                if ((requestStore == null ? void 0 : requestStore.isHmrRefresh) && requestStore.serverComponentsHmrCache) {
                    cachedFetchData = requestStore.serverComponentsHmrCache.get(cacheKey);
                }
                if (isCacheableRevalidate && !cachedFetchData) {
                    handleUnlock = await staticGenerationStore.incrementalCache.lock(cacheKey);
                    const entry = staticGenerationStore.isOnDemandRevalidate ? null : await staticGenerationStore.incrementalCache.get(cacheKey, {
                        kindHint: 'fetch',
                        revalidate: finalRevalidate,
                        fetchUrl,
                        fetchIdx,
                        tags,
                        softTags: implicitTags
                    });
                    if (entry) {
                        await handleUnlock();
                    } else {
                        // in dev, incremental cache response will be null in case the browser adds `cache-control: no-cache` in the request headers
                        cacheReasonOverride = 'cache-control: no-cache (hard refresh)';
                    }
                    if ((entry == null ? void 0 : entry.value) && entry.value.kind === 'FETCH') {
                        // when stale and is revalidating we wait for fresh data
                        // so the revalidated entry has the updated data
                        if (staticGenerationStore.isRevalidate && entry.isStale) {
                            isForegroundRevalidate = true;
                        } else {
                            if (entry.isStale) {
                                staticGenerationStore.pendingRevalidates ??= {};
                                if (!staticGenerationStore.pendingRevalidates[cacheKey]) {
                                    staticGenerationStore.pendingRevalidates[cacheKey] = doOriginalFetch(true).catch(console.error).finally(()=>{
                                        staticGenerationStore.pendingRevalidates ??= {};
                                        delete staticGenerationStore.pendingRevalidates[cacheKey || ''];
                                    });
                                }
                            }
                            cachedFetchData = entry.value.data;
                        }
                    }
                }
                if (cachedFetchData) {
                    trackFetchMetric(staticGenerationStore, {
                        start: fetchStart,
                        url: fetchUrl,
                        cacheReason,
                        cacheStatus: 'hit',
                        status: cachedFetchData.status || 200,
                        method: (init == null ? void 0 : init.method) || 'GET'
                    });
                    const response = new Response(Buffer.from(cachedFetchData.body, 'base64'), {
                        headers: cachedFetchData.headers,
                        status: cachedFetchData.status
                    });
                    Object.defineProperty(response, 'url', {
                        value: cachedFetchData.url
                    });
                    return response;
                }
            }
            if (staticGenerationStore.isStaticGeneration && init && typeof init === 'object') {
                const { cache } = init;
                // Delete `cache` property as Cloudflare Workers will throw an error
                if (isEdgeRuntime) delete init.cache;
                if (cache === 'no-store') {
                    // If enabled, we should bail out of static generation.
                    markCurrentScopeAsDynamic(staticGenerationStore, `no-store fetch ${input} ${staticGenerationStore.route}`);
                }
                const hasNextConfig = 'next' in init;
                const { next = {} } = init;
                if (typeof next.revalidate === 'number' && (typeof staticGenerationStore.revalidate === 'undefined' || typeof staticGenerationStore.revalidate === 'number' && next.revalidate < staticGenerationStore.revalidate)) {
                    if (next.revalidate === 0) {
                        // If enabled, we should bail out of static generation.
                        markCurrentScopeAsDynamic(staticGenerationStore, `revalidate: 0 fetch ${input} ${staticGenerationStore.route}`);
                    }
                    if (!staticGenerationStore.forceStatic || next.revalidate !== 0) {
                        staticGenerationStore.revalidate = next.revalidate;
                    }
                }
                if (hasNextConfig) delete init.next;
            }
            // if we are revalidating the whole page via time or on-demand and
            // the fetch cache entry is stale we should still de-dupe the
            // origin hit if it's a cache-able entry
            if (cacheKey && isForegroundRevalidate) {
                staticGenerationStore.pendingRevalidates ??= {};
                const pendingRevalidate = staticGenerationStore.pendingRevalidates[cacheKey];
                if (pendingRevalidate) {
                    const res = await pendingRevalidate;
                    return res.clone();
                }
                return staticGenerationStore.pendingRevalidates[cacheKey] = doOriginalFetch(true, cacheReasonOverride).finally(async ()=>{
                    staticGenerationStore.pendingRevalidates ??= {};
                    delete staticGenerationStore.pendingRevalidates[cacheKey || ''];
                    await handleUnlock();
                });
            } else {
                return doOriginalFetch(false, cacheReasonOverride).finally(handleUnlock);
            }
        });
    };
    // Attach the necessary properties to the patched fetch function.
    patched.__nextPatched = true;
    patched.__nextGetStaticStore = ()=>staticGenerationAsyncStorage;
    patched._nextOriginalFetch = originFetch;
    return patched;
}
// we patch fetch to collect cache information used for
// determining if a page is static or not
export function patchFetch(options) {
    // If we've already patched fetch, we should not patch it again.
    if (isPatchedFetch(globalThis.fetch)) return;
    // Grab the original fetch function. We'll attach this so we can use it in
    // the patched fetch function.
    const original = createDedupeFetch(globalThis.fetch);
    // Set the global fetch to the patched fetch.
    globalThis.fetch = createPatchedFetcher(original, options);
}

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