Marc Mintel
5397309103
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115 lines
3.2 KiB
Plaintext
115 lines
3.2 KiB
Plaintext
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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/** @typedef {import("./Resolver")} Resolver */
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/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
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/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
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/** @typedef {import("./Resolver").ResolveContextYield} ResolveContextYield */
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/** @typedef {{ [k: string]: undefined | ResolveRequest | ResolveRequest[] }} Cache */
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/**
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* @param {string} type type of cache
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* @param {ResolveRequest} request request
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* @param {boolean} withContext cache with context?
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* @returns {string} cache id
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*/
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function getCacheId(type, request, withContext) {
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return JSON.stringify({
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type,
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context: withContext ? request.context : "",
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path: request.path,
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query: request.query,
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fragment: request.fragment,
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request: request.request,
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});
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}
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module.exports = class UnsafeCachePlugin {
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/**
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* @param {string | ResolveStepHook} source source
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* @param {(request: ResolveRequest) => boolean} filterPredicate filterPredicate
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* @param {Cache} cache cache
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* @param {boolean} withContext withContext
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* @param {string | ResolveStepHook} target target
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*/
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constructor(source, filterPredicate, cache, withContext, target) {
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this.source = source;
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this.filterPredicate = filterPredicate;
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this.withContext = withContext;
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this.cache = cache;
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this.target = target;
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}
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/**
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* @param {Resolver} resolver the resolver
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* @returns {void}
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*/
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apply(resolver) {
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const target = resolver.ensureHook(this.target);
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resolver
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.getHook(this.source)
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.tapAsync("UnsafeCachePlugin", (request, resolveContext, callback) => {
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if (!this.filterPredicate(request)) return callback();
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const isYield = typeof resolveContext.yield === "function";
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const cacheId = getCacheId(
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isYield ? "yield" : "default",
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request,
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this.withContext,
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);
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const cacheEntry = this.cache[cacheId];
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if (cacheEntry) {
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if (isYield) {
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const yield_ =
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/** @type {ResolveContextYield} */
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(resolveContext.yield);
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if (Array.isArray(cacheEntry)) {
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for (const result of cacheEntry) yield_(result);
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} else {
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yield_(cacheEntry);
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}
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return callback(null, null);
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}
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return callback(null, /** @type {ResolveRequest} */ (cacheEntry));
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}
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/** @type {ResolveContextYield | undefined} */
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let yieldFn;
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/** @type {ResolveContextYield | undefined} */
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let yield_;
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/** @type {ResolveRequest[]} */
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const yieldResult = [];
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if (isYield) {
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yieldFn = resolveContext.yield;
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yield_ = (result) => {
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yieldResult.push(result);
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};
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}
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resolver.doResolve(
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target,
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request,
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null,
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yield_ ? { ...resolveContext, yield: yield_ } : resolveContext,
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(err, result) => {
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if (err) return callback(err);
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if (isYield) {
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if (result) yieldResult.push(result);
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for (const result of yieldResult) {
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/** @type {ResolveContextYield} */
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(yieldFn)(result);
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}
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this.cache[cacheId] = yieldResult;
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return callback(null, null);
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}
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if (result) return callback(null, (this.cache[cacheId] = result));
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callback();
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},
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);
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});
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}
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};
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