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50 lines
1.2 KiB
50 lines
1.2 KiB
4 years ago
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/*
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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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function getCacheId(request, withContext) {
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return JSON.stringify({
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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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request: request.request
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});
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}
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module.exports = class UnsafeCachePlugin {
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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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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 cacheId = getCacheId(request, this.withContext);
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const cacheEntry = this.cache[cacheId];
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if (cacheEntry) {
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return callback(null, cacheEntry);
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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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resolveContext,
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(err, result) => {
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if (err) return callback(err);
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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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