koa-api-cache

Supports redis cache koa router response data and auto-clearing.
Only suport request method is GET.

Quick Start

Install

$ npm install koa-api-cache

Redis Client

koa-api-cache can use ioredis redis library to keep its client connections.

Configuration

• redis: redis client.
• prefix: redis key prefix - default 'default'
• expire: redis expire time - unit:second, default '300'
• conditionFunc: set condition to cache the response content.

Usage

If your api interface response this body.

ctx.body = {
  code: 0,
  msg: "SUCCESS",
  data: {}
}

Add cache to the koa router.

const Redis = require("ioredis");
const redis = new Redis({host: "127.0.0.1", port: "6379", db: 10});
const ApiCache = require("koa-api-cache");
const apiCache = new ApiCache({redis, conditionFunc(body) {
  return body.code === 0
}});
const router = require("koa-router")();
router.get("/api/test",apiCache.route({
  prefix: "test",
  expire: 300,
  conditionFunc (body) {
    return body.code === 0;
  }
}), async ctx => {})

If you want to clear cache.

await apiCache.delCache("test");

API Docs

ApiCache.prototype.route({prefix, expire, conditionFunc}) => Promise

• prefix string, redis cache prefix
• expire number, redis ttl
• conditionFunc function, set condition to cache the response content

ApiCache.prototype.delCache(prefix) => Promise

• prefix string, redis cache prefix