66 lines
2.5 KiB
JavaScript
66 lines
2.5 KiB
JavaScript
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"use strict";
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.MAX_SIZE_FOR_NON_PROCESSED_RESOURCE = exports.getResponse = exports.add = exports.create = exports.shouldCache = void 0;
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const lru_cache_1 = __importDefault(require("lru-cache"));
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const http_cache_semantics_1 = __importDefault(require("http-cache-semantics"));
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const incoming_message_like_1 = __importDefault(require("./incoming-message-like"));
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const requestsCache = new lru_cache_1.default({
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max: 50 * 1024 * 1024,
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length: responseCacheEntry => {
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var _a;
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// NOTE: Length is resource content size.
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// 1 character is 1 bite.
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return ((_a = responseCacheEntry.res.getBody()) === null || _a === void 0 ? void 0 : _a.length) || 0;
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},
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});
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function getCacheKey(requestOptions) {
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// NOTE: We don't use pair <method:url> as a cache key since we cache only GET requests
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return requestOptions.url;
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}
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// NOTE: export for testing purposes
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function shouldCache(ctx) {
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return ctx.serverInfo.cacheRequests && !ctx.isFileProtocol && ctx.reqOpts.method === 'GET' &&
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(ctx.contentInfo.isCSS || ctx.contentInfo.isScript || !ctx.contentInfo.requireProcessing);
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}
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exports.shouldCache = shouldCache;
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function create(reqOptions, res) {
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const cachePolicy = new http_cache_semantics_1.default(reqOptions, res);
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if (!cachePolicy.storable())
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return void 0;
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return {
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key: getCacheKey(reqOptions),
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value: {
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cachePolicy,
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res: incoming_message_like_1.default.createFrom(res),
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hitCount: 0,
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},
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};
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}
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exports.create = create;
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function add(entry) {
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const { key, value } = entry;
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requestsCache.set(key, value, value.cachePolicy.timeToLive());
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}
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exports.add = add;
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function getResponse(reqOptions) {
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const key = getCacheKey(reqOptions);
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const cachedResponse = requestsCache.get(key);
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if (!cachedResponse)
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return void 0;
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const { cachePolicy, res } = cachedResponse;
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if (!cachePolicy.satisfiesWithoutRevalidation(reqOptions))
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return void 0;
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res.headers = cachePolicy.responseHeaders();
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cachedResponse.hitCount++;
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return {
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res,
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hitCount: cachedResponse.hitCount,
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};
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}
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exports.getResponse = getResponse;
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// NOTE: Maximum size for the non processed resource is 5 Mb
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exports.MAX_SIZE_FOR_NON_PROCESSED_RESOURCE = 5 * 1024 * 1024;
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