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| Current File : //home/livedhms/lmgt/node_modules/next/dist/server/lib/incremental-cache/index.js |
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
0 && (module.exports = {
CacheHandler: null,
IncrementalCache: null
});
function _export(target, all) {
for(var name in all)Object.defineProperty(target, name, {
enumerable: true,
get: all[name]
});
}
_export(exports, {
CacheHandler: function() {
return CacheHandler;
},
IncrementalCache: function() {
return IncrementalCache;
}
});
const _responsecache = require("../../response-cache");
const _filesystemcache = /*#__PURE__*/ _interop_require_default(require("./file-system-cache"));
const _normalizepagepath = require("../../../shared/lib/page-path/normalize-page-path");
const _constants = require("../../../lib/constants");
const _toroute = require("../to-route");
const _sharedcachecontrolsexternal = require("./shared-cache-controls.external");
const _workunitasyncstorageexternal = require("../../app-render/work-unit-async-storage.external");
const _invarianterror = require("../../../shared/lib/invariant-error");
const _serverutils = require("../../server-utils");
const _workasyncstorageexternal = require("../../app-render/work-async-storage.external");
const _detachedpromise = require("../../../lib/detached-promise");
const _tagsmanifestexternal = require("./tags-manifest.external");
function _interop_require_default(obj) {
return obj && obj.__esModule ? obj : {
default: obj
};
}
class CacheHandler {
// eslint-disable-next-line
constructor(_ctx){}
async get(_cacheKey, _ctx) {
return {};
}
async set(_cacheKey, _data, _ctx) {}
async revalidateTag(_tags, _durations) {}
resetRequestCache() {}
}
class IncrementalCache {
static #_ = this.debug = !!process.env.NEXT_PRIVATE_DEBUG_CACHE;
constructor({ fs, dev, flushToDisk, minimalMode, serverDistDir, requestHeaders, maxMemoryCacheSize, getPrerenderManifest, fetchCacheKeyPrefix, CurCacheHandler, allowedRevalidateHeaderKeys }){
var _this_prerenderManifest_preview, _this_prerenderManifest;
this.locks = new Map();
this.hasCustomCacheHandler = Boolean(CurCacheHandler);
const cacheHandlersSymbol = Symbol.for('@next/cache-handlers');
const _globalThis = globalThis;
if (!CurCacheHandler) {
// if we have a global cache handler available leverage it
const globalCacheHandler = _globalThis[cacheHandlersSymbol];
if (globalCacheHandler == null ? void 0 : globalCacheHandler.FetchCache) {
CurCacheHandler = globalCacheHandler.FetchCache;
if (IncrementalCache.debug) {
console.log('IncrementalCache: using global FetchCache cache handler');
}
} else {
if (fs && serverDistDir) {
if (IncrementalCache.debug) {
console.log('IncrementalCache: using filesystem cache handler');
}
CurCacheHandler = _filesystemcache.default;
}
}
} else if (IncrementalCache.debug) {
console.log('IncrementalCache: using custom cache handler', CurCacheHandler.name);
}
if (process.env.__NEXT_TEST_MAX_ISR_CACHE) {
// Allow cache size to be overridden for testing purposes
maxMemoryCacheSize = parseInt(process.env.__NEXT_TEST_MAX_ISR_CACHE, 10);
}
this.dev = dev;
this.disableForTestmode = process.env.NEXT_PRIVATE_TEST_PROXY === 'true';
// this is a hack to avoid Webpack knowing this is equal to this.minimalMode
// because we replace this.minimalMode to true in production bundles.
const minimalModeKey = 'minimalMode';
this[minimalModeKey] = minimalMode;
this.requestHeaders = requestHeaders;
this.allowedRevalidateHeaderKeys = allowedRevalidateHeaderKeys;
this.prerenderManifest = getPrerenderManifest();
this.cacheControls = new _sharedcachecontrolsexternal.SharedCacheControls(this.prerenderManifest);
this.fetchCacheKeyPrefix = fetchCacheKeyPrefix;
let revalidatedTags = [];
if (requestHeaders[_constants.PRERENDER_REVALIDATE_HEADER] === ((_this_prerenderManifest = this.prerenderManifest) == null ? void 0 : (_this_prerenderManifest_preview = _this_prerenderManifest.preview) == null ? void 0 : _this_prerenderManifest_preview.previewModeId)) {
this.isOnDemandRevalidate = true;
}
if (minimalMode) {
var _this_prerenderManifest_preview1, _this_prerenderManifest1;
revalidatedTags = this.revalidatedTags = (0, _serverutils.getPreviouslyRevalidatedTags)(requestHeaders, (_this_prerenderManifest1 = this.prerenderManifest) == null ? void 0 : (_this_prerenderManifest_preview1 = _this_prerenderManifest1.preview) == null ? void 0 : _this_prerenderManifest_preview1.previewModeId);
}
if (CurCacheHandler) {
this.cacheHandler = new CurCacheHandler({
dev,
fs,
flushToDisk,
serverDistDir,
revalidatedTags,
maxMemoryCacheSize,
_requestHeaders: requestHeaders,
fetchCacheKeyPrefix
});
}
}
calculateRevalidate(pathname, fromTime, dev, isFallback) {
// in development we don't have a prerender-manifest
// and default to always revalidating to allow easier debugging
if (dev) return Math.floor(performance.timeOrigin + performance.now() - 1000);
const cacheControl = this.cacheControls.get((0, _toroute.toRoute)(pathname));
// if an entry isn't present in routes we fallback to a default
// of revalidating after 1 second unless it's a fallback request.
const initialRevalidateSeconds = cacheControl ? cacheControl.revalidate : isFallback ? false : 1;
const revalidateAfter = typeof initialRevalidateSeconds === 'number' ? initialRevalidateSeconds * 1000 + fromTime : initialRevalidateSeconds;
return revalidateAfter;
}
_getPathname(pathname, fetchCache) {
return fetchCache ? pathname : (0, _normalizepagepath.normalizePagePath)(pathname);
}
resetRequestCache() {
var _this_cacheHandler_resetRequestCache, _this_cacheHandler;
(_this_cacheHandler = this.cacheHandler) == null ? void 0 : (_this_cacheHandler_resetRequestCache = _this_cacheHandler.resetRequestCache) == null ? void 0 : _this_cacheHandler_resetRequestCache.call(_this_cacheHandler);
}
async lock(cacheKey) {
// Wait for any existing lock on this cache key to be released
// This implements a simple queue-based locking mechanism
while(true){
const lock = this.locks.get(cacheKey);
if (IncrementalCache.debug) {
console.log('IncrementalCache: lock get', cacheKey, !!lock);
}
// If no lock exists, we can proceed to acquire it
if (!lock) break;
// Wait for the existing lock to be released before trying again
await lock;
}
// Create a new detached promise that will represent this lock
// The resolve function (unlock) will be returned to the caller
const { resolve, promise } = new _detachedpromise.DetachedPromise();
if (IncrementalCache.debug) {
console.log('IncrementalCache: successfully locked', cacheKey);
}
// Store the lock promise in the locks map
this.locks.set(cacheKey, promise);
return ()=>{
// Resolve the promise to release the lock.
resolve();
// Remove the lock from the map once it's released so that future gets
// can acquire the lock.
this.locks.delete(cacheKey);
};
}
async revalidateTag(tags, durations) {
var _this_cacheHandler;
return (_this_cacheHandler = this.cacheHandler) == null ? void 0 : _this_cacheHandler.revalidateTag(tags, durations);
}
// x-ref: https://github.com/facebook/react/blob/2655c9354d8e1c54ba888444220f63e836925caa/packages/react/src/ReactFetch.js#L23
async generateCacheKey(url, init = {}) {
// this should be bumped anytime a fix is made to cache entries
// that should bust the cache
const MAIN_KEY_PREFIX = 'v3';
const bodyChunks = [];
const encoder = new TextEncoder();
const decoder = new TextDecoder();
if (init.body) {
// handle Uint8Array body
if (init.body instanceof Uint8Array) {
bodyChunks.push(decoder.decode(init.body));
init._ogBody = init.body;
} else if (typeof init.body.getReader === 'function') {
const readableBody = init.body;
const chunks = [];
try {
await readableBody.pipeTo(new WritableStream({
write (chunk) {
if (typeof chunk === 'string') {
chunks.push(encoder.encode(chunk));
bodyChunks.push(chunk);
} else {
chunks.push(chunk);
bodyChunks.push(decoder.decode(chunk, {
stream: true
}));
}
}
}));
// Flush the decoder.
bodyChunks.push(decoder.decode());
// Create a new buffer with all the chunks.
const length = chunks.reduce((total, arr)=>total + arr.length, 0);
const arrayBuffer = new Uint8Array(length);
// Push each of the chunks into the new array buffer.
let offset = 0;
for (const chunk of chunks){
arrayBuffer.set(chunk, offset);
offset += chunk.length;
}
;
init._ogBody = arrayBuffer;
} catch (err) {
console.error('Problem reading body', err);
}
} else if (typeof init.body.keys === 'function') {
const formData = init.body;
init._ogBody = init.body;
for (const key of new Set([
...formData.keys()
])){
const values = formData.getAll(key);
bodyChunks.push(`${key}=${(await Promise.all(values.map(async (val)=>{
if (typeof val === 'string') {
return val;
} else {
return await val.text();
}
}))).join(',')}`);
}
// handle blob body
} else if (typeof init.body.arrayBuffer === 'function') {
const blob = init.body;
const arrayBuffer = await blob.arrayBuffer();
bodyChunks.push(await blob.text());
init._ogBody = new Blob([
arrayBuffer
], {
type: blob.type
});
} else if (typeof init.body === 'string') {
bodyChunks.push(init.body);
init._ogBody = init.body;
}
}
const headers = typeof (init.headers || {}).keys === 'function' ? Object.fromEntries(init.headers) : Object.assign({}, init.headers);
// w3c trace context headers can break request caching and deduplication
// so we remove them from the cache key
if ('traceparent' in headers) delete headers['traceparent'];
if ('tracestate' in headers) delete headers['tracestate'];
const cacheString = JSON.stringify([
MAIN_KEY_PREFIX,
this.fetchCacheKeyPrefix || '',
url,
init.method,
headers,
init.mode,
init.redirect,
init.credentials,
init.referrer,
init.referrerPolicy,
init.integrity,
init.cache,
bodyChunks
]);
if (process.env.NEXT_RUNTIME === 'edge') {
function bufferToHex(buffer) {
return Array.prototype.map.call(new Uint8Array(buffer), (b)=>b.toString(16).padStart(2, '0')).join('');
}
const buffer = encoder.encode(cacheString);
return bufferToHex(await crypto.subtle.digest('SHA-256', buffer));
} else {
const crypto1 = require('crypto');
return crypto1.createHash('sha256').update(cacheString).digest('hex');
}
}
async get(cacheKey, ctx) {
var _this_cacheHandler, _cacheData_value;
// Unlike other caches if we have a resume data cache, we use it even if
// testmode would normally disable it or if requestHeaders say 'no-cache'.
if (ctx.kind === _responsecache.IncrementalCacheKind.FETCH) {
const workUnitStore = _workunitasyncstorageexternal.workUnitAsyncStorage.getStore();
const resumeDataCache = workUnitStore ? (0, _workunitasyncstorageexternal.getRenderResumeDataCache)(workUnitStore) : null;
if (resumeDataCache) {
const memoryCacheData = resumeDataCache.fetch.get(cacheKey);
if ((memoryCacheData == null ? void 0 : memoryCacheData.kind) === _responsecache.CachedRouteKind.FETCH) {
if (IncrementalCache.debug) {
console.log('IncrementalCache: rdc:hit', cacheKey);
}
return {
isStale: false,
value: memoryCacheData
};
} else if (IncrementalCache.debug) {
console.log('IncrementalCache: rdc:miss', cacheKey);
}
} else {
if (IncrementalCache.debug) {
console.log('IncrementalCache: rdc:no-resume-data');
}
}
}
// we don't leverage the prerender cache in dev mode
// so that getStaticProps is always called for easier debugging
if (this.disableForTestmode || this.dev && (ctx.kind !== _responsecache.IncrementalCacheKind.FETCH || this.requestHeaders['cache-control'] === 'no-cache')) {
return null;
}
cacheKey = this._getPathname(cacheKey, ctx.kind === _responsecache.IncrementalCacheKind.FETCH);
const cacheData = await ((_this_cacheHandler = this.cacheHandler) == null ? void 0 : _this_cacheHandler.get(cacheKey, ctx));
if (ctx.kind === _responsecache.IncrementalCacheKind.FETCH) {
var _cacheData_value1;
if (!cacheData) {
return null;
}
if (((_cacheData_value1 = cacheData.value) == null ? void 0 : _cacheData_value1.kind) !== _responsecache.CachedRouteKind.FETCH) {
var _cacheData_value2;
throw Object.defineProperty(new _invarianterror.InvariantError(`Expected cached value for cache key ${JSON.stringify(cacheKey)} to be a "FETCH" kind, got ${JSON.stringify((_cacheData_value2 = cacheData.value) == null ? void 0 : _cacheData_value2.kind)} instead.`), "__NEXT_ERROR_CODE", {
value: "E653",
enumerable: false,
configurable: true
});
}
const workStore = _workasyncstorageexternal.workAsyncStorage.getStore();
const combinedTags = [
...ctx.tags || [],
...ctx.softTags || []
];
// if a tag was revalidated we don't return stale data
if (combinedTags.some((tag)=>{
var _this_revalidatedTags, _workStore_pendingRevalidatedTags;
return ((_this_revalidatedTags = this.revalidatedTags) == null ? void 0 : _this_revalidatedTags.includes(tag)) || (workStore == null ? void 0 : (_workStore_pendingRevalidatedTags = workStore.pendingRevalidatedTags) == null ? void 0 : _workStore_pendingRevalidatedTags.some((item)=>item.tag === tag));
})) {
if (IncrementalCache.debug) {
console.log('IncrementalCache: expired tag', cacheKey);
}
return null;
}
// As we're able to get the cache entry for this fetch, and the prerender
// resume data cache (RDC) is available, it must have been populated by a
// previous fetch, but was not yet present in the in-memory cache. This
// could be the case when performing multiple renders in parallel during
// build time where we de-duplicate the fetch calls.
//
// We add it to the RDC so that the next fetch call will be able to use it
// and it won't have to reach into the fetch cache implementation.
const workUnitStore = _workunitasyncstorageexternal.workUnitAsyncStorage.getStore();
if (workUnitStore) {
const prerenderResumeDataCache = (0, _workunitasyncstorageexternal.getPrerenderResumeDataCache)(workUnitStore);
if (prerenderResumeDataCache) {
if (IncrementalCache.debug) {
console.log('IncrementalCache: rdc:set', cacheKey);
}
prerenderResumeDataCache.fetch.set(cacheKey, cacheData.value);
}
}
const revalidate = ctx.revalidate || cacheData.value.revalidate;
const age = (performance.timeOrigin + performance.now() - (cacheData.lastModified || 0)) / 1000;
let isStale = age > revalidate;
const data = cacheData.value.data;
if ((0, _tagsmanifestexternal.areTagsExpired)(combinedTags, cacheData.lastModified)) {
return null;
} else if ((0, _tagsmanifestexternal.areTagsStale)(combinedTags, cacheData.lastModified)) {
isStale = true;
}
return {
isStale,
value: {
kind: _responsecache.CachedRouteKind.FETCH,
data,
revalidate
}
};
} else if ((cacheData == null ? void 0 : (_cacheData_value = cacheData.value) == null ? void 0 : _cacheData_value.kind) === _responsecache.CachedRouteKind.FETCH) {
throw Object.defineProperty(new _invarianterror.InvariantError(`Expected cached value for cache key ${JSON.stringify(cacheKey)} not to be a ${JSON.stringify(ctx.kind)} kind, got "FETCH" instead.`), "__NEXT_ERROR_CODE", {
value: "E652",
enumerable: false,
configurable: true
});
}
let entry = null;
const cacheControl = this.cacheControls.get((0, _toroute.toRoute)(cacheKey));
let isStale;
let revalidateAfter;
if ((cacheData == null ? void 0 : cacheData.lastModified) === -1) {
isStale = -1;
revalidateAfter = -1 * _constants.CACHE_ONE_YEAR;
} else {
var _cacheData_value3, _cacheData_value4;
const now = performance.timeOrigin + performance.now();
const lastModified = (cacheData == null ? void 0 : cacheData.lastModified) || now;
revalidateAfter = this.calculateRevalidate(cacheKey, lastModified, this.dev ?? false, ctx.isFallback);
isStale = revalidateAfter !== false && revalidateAfter < now ? true : undefined;
// If the stale time couldn't be determined based on the revalidation
// time, we check if the tags are expired or stale.
if (isStale === undefined && ((cacheData == null ? void 0 : (_cacheData_value3 = cacheData.value) == null ? void 0 : _cacheData_value3.kind) === _responsecache.CachedRouteKind.APP_PAGE || (cacheData == null ? void 0 : (_cacheData_value4 = cacheData.value) == null ? void 0 : _cacheData_value4.kind) === _responsecache.CachedRouteKind.APP_ROUTE)) {
var _cacheData_value_headers;
const tagsHeader = (_cacheData_value_headers = cacheData.value.headers) == null ? void 0 : _cacheData_value_headers[_constants.NEXT_CACHE_TAGS_HEADER];
if (typeof tagsHeader === 'string') {
const cacheTags = tagsHeader.split(',');
if (cacheTags.length > 0) {
if ((0, _tagsmanifestexternal.areTagsExpired)(cacheTags, lastModified)) {
isStale = -1;
} else if ((0, _tagsmanifestexternal.areTagsStale)(cacheTags, lastModified)) {
isStale = true;
}
}
}
}
}
if (cacheData) {
entry = {
isStale,
cacheControl,
revalidateAfter,
value: cacheData.value
};
}
if (!cacheData && this.prerenderManifest.notFoundRoutes.includes(cacheKey)) {
// for the first hit after starting the server the cache
// may not have a way to save notFound: true so if
// the prerender-manifest marks this as notFound then we
// return that entry and trigger a cache set to give it a
// chance to update in-memory entries
entry = {
isStale,
value: null,
cacheControl,
revalidateAfter
};
this.set(cacheKey, entry.value, {
...ctx,
cacheControl
});
}
return entry;
}
async set(pathname, data, ctx) {
// Even if we otherwise disable caching for testMode or if no fetchCache is
// configured we still always stash results in the resume data cache if one
// exists. This is because this is a transient in memory cache that
// populates caches ahead of a dynamic render in dev mode to allow the RSC
// debug info to have the right environment associated to it.
if ((data == null ? void 0 : data.kind) === _responsecache.CachedRouteKind.FETCH) {
const workUnitStore = _workunitasyncstorageexternal.workUnitAsyncStorage.getStore();
const prerenderResumeDataCache = workUnitStore ? (0, _workunitasyncstorageexternal.getPrerenderResumeDataCache)(workUnitStore) : null;
if (prerenderResumeDataCache) {
if (IncrementalCache.debug) {
console.log('IncrementalCache: rdc:set', pathname);
}
prerenderResumeDataCache.fetch.set(pathname, data);
}
}
if (this.disableForTestmode || this.dev && !ctx.fetchCache) return;
pathname = this._getPathname(pathname, ctx.fetchCache);
// FetchCache has upper limit of 2MB per-entry currently
const itemSize = JSON.stringify(data).length;
if (ctx.fetchCache && itemSize > 2 * 1024 * 1024 && // We ignore the size limit when custom cache handler is being used, as it
// might not have this limit
!this.hasCustomCacheHandler && // We also ignore the size limit when it's an implicit build-time-only
// caching that the user isn't even aware of.
!ctx.isImplicitBuildTimeCache) {
const warningText = `Failed to set Next.js data cache for ${ctx.fetchUrl || pathname}, items over 2MB can not be cached (${itemSize} bytes)`;
if (this.dev) {
throw Object.defineProperty(new Error(warningText), "__NEXT_ERROR_CODE", {
value: "E394",
enumerable: false,
configurable: true
});
}
console.warn(warningText);
return;
}
try {
var _this_cacheHandler;
if (!ctx.fetchCache && ctx.cacheControl) {
this.cacheControls.set((0, _toroute.toRoute)(pathname), ctx.cacheControl);
}
await ((_this_cacheHandler = this.cacheHandler) == null ? void 0 : _this_cacheHandler.set(pathname, data, ctx));
} catch (error) {
console.warn('Failed to update prerender cache for', pathname, error);
}
}
}
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