next
Version:
The React Framework
158 lines (157 loc) • 7.22 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
Object.defineProperty(exports, "default", {
enumerable: true,
get: function() {
return ResponseCache;
}
});
0 && __export(require("./types"));
const _batcher = require("../../lib/batcher");
const _scheduler = require("../../lib/scheduler");
const _utils = require("./utils");
_export_star(require("./types"), exports);
function _export_star(from, to) {
Object.keys(from).forEach(function(k) {
if (k !== "default" && !Object.prototype.hasOwnProperty.call(to, k)) {
Object.defineProperty(to, k, {
enumerable: true,
get: function() {
return from[k];
}
});
}
});
return from;
}
class ResponseCache {
constructor(minimalMode){
this.batcher = _batcher.Batcher.create({
// Ensure on-demand revalidate doesn't block normal requests, it should be
// safe to run an on-demand revalidate for the same key as a normal request.
cacheKeyFn: ({ key, isOnDemandRevalidate })=>`${key}-${isOnDemandRevalidate ? '1' : '0'}`,
// We wait to do any async work until after we've added our promise to
// `pendingResponses` to ensure that any any other calls will reuse the
// same promise until we've fully finished our work.
schedulerFn: _scheduler.scheduleOnNextTick
});
// 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;
}
async get(key, responseGenerator, context) {
// If there is no key for the cache, we can't possibly look this up in the
// cache so just return the result of the response generator.
if (!key) {
return responseGenerator({
hasResolved: false,
previousCacheEntry: null
});
}
const { incrementalCache, isOnDemandRevalidate = false, isFallback = false, isRoutePPREnabled = false } = context;
const response = await this.batcher.batch({
key,
isOnDemandRevalidate
}, async (cacheKey, resolve)=>{
var _this_previousCacheItem;
// We keep the previous cache entry around to leverage when the
// incremental cache is disabled in minimal mode.
if (this.minimalMode && ((_this_previousCacheItem = this.previousCacheItem) == null ? void 0 : _this_previousCacheItem.key) === cacheKey && this.previousCacheItem.expiresAt > Date.now()) {
return this.previousCacheItem.entry;
}
// Coerce the kindHint into a given kind for the incremental cache.
const kind = (0, _utils.routeKindToIncrementalCacheKind)(context.routeKind);
let resolved = false;
let cachedResponse = null;
try {
cachedResponse = !this.minimalMode ? await incrementalCache.get(key, {
kind,
isRoutePPREnabled: context.isRoutePPREnabled,
isFallback
}) : null;
if (cachedResponse && !isOnDemandRevalidate) {
resolve(cachedResponse);
resolved = true;
if (!cachedResponse.isStale || context.isPrefetch) {
// The cached value is still valid, so we don't need
// to update it yet.
return null;
}
}
const cacheEntry = await responseGenerator({
hasResolved: resolved,
previousCacheEntry: cachedResponse,
isRevalidating: true
});
// If the cache entry couldn't be generated, we don't want to cache
// the result.
if (!cacheEntry) {
// Unset the previous cache item if it was set.
if (this.minimalMode) this.previousCacheItem = undefined;
return null;
}
const resolveValue = await (0, _utils.fromResponseCacheEntry)({
...cacheEntry,
isMiss: !cachedResponse
});
if (!resolveValue) {
// Unset the previous cache item if it was set.
if (this.minimalMode) this.previousCacheItem = undefined;
return null;
}
// For on-demand revalidate wait to resolve until cache is set.
// Otherwise resolve now.
if (!isOnDemandRevalidate && !resolved) {
resolve(resolveValue);
resolved = true;
}
// We want to persist the result only if it has a cache control value
// defined.
if (resolveValue.cacheControl) {
if (this.minimalMode) {
this.previousCacheItem = {
key: cacheKey,
entry: resolveValue,
expiresAt: Date.now() + 1000
};
} else {
await incrementalCache.set(key, resolveValue.value, {
cacheControl: resolveValue.cacheControl,
isRoutePPREnabled,
isFallback
});
}
}
return resolveValue;
} catch (err) {
// When a path is erroring we automatically re-set the existing cache
// with new revalidate and expire times to prevent non-stop retrying.
if (cachedResponse == null ? void 0 : cachedResponse.cacheControl) {
const newRevalidate = Math.min(Math.max(cachedResponse.cacheControl.revalidate || 3, 3), 30);
const newExpire = cachedResponse.cacheControl.expire === undefined ? undefined : Math.max(newRevalidate + 3, cachedResponse.cacheControl.expire);
await incrementalCache.set(key, cachedResponse.value, {
cacheControl: {
revalidate: newRevalidate,
expire: newExpire
},
isRoutePPREnabled,
isFallback
});
}
// While revalidating in the background we can't reject as we already
// resolved the cache entry so log the error here.
if (resolved) {
console.error(err);
return null;
}
// We haven't resolved yet, so let's throw to indicate an error.
throw err;
}
});
return (0, _utils.toResponseCacheEntry)(response);
}
}
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