koa2-url-cache

Koa 2 middleware for cache response data.

1. regular match url. path-to-regexp
2. cache data in redis.

Install

npm install koa2-url-cache --save

Get start

const config = {
  redis: {
    host: '121.196.203.34',
    port: 6379,
    password: '',
    db: 0,
  },
  urls: {
    '/api/user/:name': {
      ttl: 30, // seconds
    }
  }
}
app.use(cache(config));

refresh

Delete cache manual, qury url add parameter refresh=1

demo

/api/user/list?refresh=1

Config

redis

node_redis

prefix [optional]

1. Default 'page'
2. prefix is redis prefix key to storage cache data.

disable [optional]

1. Default false
2. Diasble cache for all routes

loggerLevel [optional]

1. Default 'info'
2. Power by winston

http code 200

only cache http code==200 error

addHeaders {Object} [optional]

Add all key-value to response headers.

  addHeaders: {
    "Access-Control-Allow-Origin": "http://localhost:8080",
    "Access-Control-Allow-Methods": "POST, GET, OPTIONS",
    "Access-Control-Allow-Headers": "*"
  }

urls {Object}

• key is match by path-to-regexp
  • ttl {integer} expire in ttl. seconds。no cache ,set ttl = null
  • addHeaders {Object}. It will cover the top level addHeaders

    '/api/user': {
      ttl: '30', // seconds
      addHeaders: { // custom headers
        'x-power':'lx'
      }
    },

example:

1. /foo/:bar
2. /:foo/:bar?
3. /:foo(\d+) more: path-to-regexp ...