nest-api-cache
Version:
使用redis实现nestjs接口层面的缓存
61 lines (60 loc) • 2.88 kB
JavaScript
;
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
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;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.NestApiCacheInterceptor = void 0;
const common_1 = require("@nestjs/common");
const rxjs_1 = require("rxjs");
const operators_1 = require("rxjs/operators");
const constants_1 = require("../../constants");
const redis_cache_service_1 = require("./../../services/redis-cache/redis-cache.service");
/**
* @Author: 水痕
* @Date: 2021-03-08 13:04:56
* @LastEditors: 水痕
* @Description: 定义redis缓存接口的中间件。提高接口访问速度
* @param {*}
* @return {*}
*/
let NestApiCacheInterceptor = class NestApiCacheInterceptor {
constructor(redisCacheService) {
this.redisCacheService = redisCacheService;
}
async intercept(context, next) {
const request = context.switchToHttp().getRequest();
// 反射的方法获取接口是否需要缓存
const isCacheApi = Reflect.getMetadata(constants_1.REDIS_CACHE_KEY, context.getHandler()) || Reflect.getMetadata(constants_1.REDIS_CACHE_KEY, context.getClass());
const redisEXSecond = Reflect.getMetadata(constants_1.REDIS_CACHE_EX_SECOND_KEY, context.getHandler()) || Reflect.getMetadata(constants_1.REDIS_CACHE_EX_SECOND_KEY, context.getClass());
if (isCacheApi) {
const redisKey = this.redisCacheKey(request.method, request.url);
const redisData = await this.redisCacheService.get(redisKey);
if (redisData) {
return rxjs_1.of(redisData);
}
else {
return next.handle().pipe(operators_1.map(data => {
this.redisCacheService.set(redisKey, data, redisEXSecond);
return data;
}));
}
}
else {
return next.handle();
}
}
redisCacheKey(method, url) {
return `${method}:${url}`;
}
};
NestApiCacheInterceptor = __decorate([
common_1.Injectable(),
__metadata("design:paramtypes", [redis_cache_service_1.RedisCacheService])
], NestApiCacheInterceptor);
exports.NestApiCacheInterceptor = NestApiCacheInterceptor;