optimize: sử dụng redis để cache cho các response từ server
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import { CallHandler, ExecutionContext, NestInterceptor } from '@nestjs/common';
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import { Observable } from 'rxjs';
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import { Cache } from 'cache-manager';
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import { HttpAdapterHost } from '@nestjs/core';
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export declare class CompressCacheInterceptor implements NestInterceptor {
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private cacheManager;
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private readonly httpAdapterHost;
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constructor(cacheManager: Cache, httpAdapterHost: HttpAdapterHost);
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intercept(context: ExecutionContext, next: CallHandler): Promise<Observable<any>>;
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}
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"use strict";
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var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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var desc = Object.getOwnPropertyDescriptor(m, k);
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if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
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desc = { enumerable: true, get: function() { return m[k]; } };
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}
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Object.defineProperty(o, k2, desc);
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}) : (function(o, m, k, k2) {
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if (k2 === undefined) k2 = k;
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o[k2] = m[k];
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}));
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var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
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Object.defineProperty(o, "default", { enumerable: true, value: v });
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}) : function(o, v) {
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o["default"] = v;
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});
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var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
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var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
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if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
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else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
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return c > 3 && r && Object.defineProperty(target, key, r), r;
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};
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var __importStar = (this && this.__importStar) || (function () {
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var ownKeys = function(o) {
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ownKeys = Object.getOwnPropertyNames || function (o) {
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var ar = [];
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for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
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return ar;
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};
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return ownKeys(o);
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};
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return function (mod) {
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if (mod && mod.__esModule) return mod;
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var result = {};
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if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
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__setModuleDefault(result, mod);
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return result;
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};
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})();
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var __metadata = (this && this.__metadata) || function (k, v) {
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if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
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};
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var __param = (this && this.__param) || function (paramIndex, decorator) {
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return function (target, key) { decorator(target, key, paramIndex); }
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.CompressCacheInterceptor = void 0;
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const common_1 = require("@nestjs/common");
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const rxjs_1 = require("rxjs");
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const operators_1 = require("rxjs/operators");
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const cache_manager_1 = require("@nestjs/cache-manager");
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const zlib = __importStar(require("zlib"));
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const util_1 = require("util");
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const core_1 = require("@nestjs/core");
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const gzip = (0, util_1.promisify)(zlib.gzip);
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const gunzip = (0, util_1.promisify)(zlib.gunzip);
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const COMPRESSION_THRESHOLD = 100;
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let CompressCacheInterceptor = class CompressCacheInterceptor {
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constructor(cacheManager, httpAdapterHost) {
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this.cacheManager = cacheManager;
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this.httpAdapterHost = httpAdapterHost;
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}
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async intercept(context, next) {
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const httpAdapter = this.httpAdapterHost.httpAdapter;
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const request = context.getArgByIndex(0);
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const response = context.getArgByIndex(1);
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if (httpAdapter.getRequestMethod(request) !== 'GET') {
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return next.handle();
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}
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const cacheKey = httpAdapter.getRequestUrl(request);
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let cachedData = await this.cacheManager.get(cacheKey);
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if (cachedData) {
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try {
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if (Buffer.isBuffer(cachedData) && cachedData.length > 2 && cachedData[0] === 0x1f && cachedData[1] === 0x8b) {
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const decompressed = await gunzip(cachedData);
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const jsonString = decompressed.toString('utf8');
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httpAdapter.setHeader(response, 'Content-Type', 'application/json');
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httpAdapter.setHeader(response, 'X-Cache', 'HIT (Compressed)');
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return (0, rxjs_1.of)(JSON.parse(jsonString));
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}
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else {
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const jsonString = cachedData.toString();
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httpAdapter.setHeader(response, 'Content-Type', 'application/json');
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httpAdapter.setHeader(response, 'X-Cache', 'HIT (Uncompressed)');
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return (0, rxjs_1.of)(JSON.parse(jsonString));
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}
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}
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catch (e) {
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console.error(`[Cache] Lỗi giải nén dữ liệu cache cho key ${cacheKey}:`, e);
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await this.cacheManager.del(cacheKey);
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}
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}
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httpAdapter.setHeader(response, 'X-Cache', 'MISS');
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return next.handle().pipe((0, operators_1.tap)(async (data) => {
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if (!data)
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return;
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const jsonString = JSON.stringify(data);
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const ttl = 60000;
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if (jsonString.length > COMPRESSION_THRESHOLD) {
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try {
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const compressed = await gzip(Buffer.from(jsonString, 'utf8'));
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await this.cacheManager.set(cacheKey, compressed, ttl);
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}
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catch (e) {
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console.error(`[Cache] Lỗi nén dữ liệu cho key ${cacheKey}:`, e);
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await this.cacheManager.set(cacheKey, jsonString, ttl);
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}
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}
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else {
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await this.cacheManager.set(cacheKey, jsonString, ttl);
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}
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}));
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}
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};
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exports.CompressCacheInterceptor = CompressCacheInterceptor;
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exports.CompressCacheInterceptor = CompressCacheInterceptor = __decorate([
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(0, common_1.Injectable)(),
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__param(0, (0, common_1.Inject)(cache_manager_1.CACHE_MANAGER)),
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__metadata("design:paramtypes", [Object, core_1.HttpAdapterHost])
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], CompressCacheInterceptor);
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//# sourceMappingURL=compress-cache.interceptor.js.map
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@@ -0,0 +1 @@
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