Initial boiler plate project

node_modules/next/dist/esm/server/response-cache/index.js

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+import { RouteKind } from "../future/route-kind";
+import { Batcher } from "../../lib/batcher";
+import { scheduleOnNextTick } from "../../lib/scheduler";
+import { fromResponseCacheEntry, toResponseCacheEntry } from "./utils";
+export * from "./types";
+export default class ResponseCache {
+    constructor(minimalMode){
+        this.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: 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(false, null);
+        const { incrementalCache, isOnDemandRevalidate = 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.
+            let kindHint;
+            if (context.routeKind === RouteKind.APP_PAGE || context.routeKind === RouteKind.APP_ROUTE) {
+                kindHint = "app";
+            } else if (context.routeKind === RouteKind.PAGES) {
+                kindHint = "pages";
+            }
+            let resolved = false;
+            let cachedResponse = null;
+            try {
+                cachedResponse = !this.minimalMode ? await incrementalCache.get(key, {
+                    kindHint
+                }) : null;
+                if (cachedResponse && !isOnDemandRevalidate) {
+                    var _cachedResponse_value;
+                    if (((_cachedResponse_value = cachedResponse.value) == null ? void 0 : _cachedResponse_value.kind) === "FETCH") {
+                        throw new Error(`invariant: unexpected cachedResponse of kind fetch in response cache`);
+                    }
+                    resolve({
+                        ...cachedResponse,
+                        revalidate: cachedResponse.curRevalidate
+                    });
+                    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(resolved, cachedResponse, 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 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;
+                }
+                if (typeof resolveValue.revalidate !== "undefined") {
+                    if (this.minimalMode) {
+                        this.previousCacheItem = {
+                            key: cacheKey,
+                            entry: resolveValue,
+                            expiresAt: Date.now() + 1000
+                        };
+                    } else {
+                        await incrementalCache.set(key, resolveValue.value, {
+                            revalidate: resolveValue.revalidate
+                        });
+                    }
+                }
+                return resolveValue;
+            } catch (err) {
+                // When a getStaticProps path is erroring we automatically re-set the
+                // existing cache under a new expiration to prevent non-stop retrying.
+                if (cachedResponse) {
+                    await incrementalCache.set(key, cachedResponse.value, {
+                        revalidate: Math.min(Math.max(cachedResponse.revalidate || 3, 3), 30)
+                    });
+                }
+                // 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 toResponseCacheEntry(response);
+    }
+}
+
+//# sourceMappingURL=index.js.map