koa-redis-cache

koa-redis-cache

How to use ?

const cache = require('koa-redis-cache')
const Koa = require('koa')
const app = new Koa()
 
const options = {
  expire: 60,
  routes: ['/index']
}
 
app.use(cache(options))

options

• prefix
  • type: String or Function
  • redis key prefix, default is koa-redis-cache:
  • If a function is supplied, its signature should be function(ctx) {} and it should return a string to use as the redis key prefix
• expire
  • type: Number
  • redis expire time (second), default is 30 * 60 (30 min)
• passParam
  • type: String
  • if the passParam is existed in query string, not get from cache
• maxLength
  • type: Number
  • max length of the body to cache
• routes
  • type: Array
  • the routes to cache, default is ['(.*)']
  • It could be ['/api/(.*)', '/view/:id'], see path-to-regexp
• exclude
  • type: Array
  • the routes to exclude, default is []
  • It could be ['/api/(.*)', '/view/:id'], see path-to-regexp
• onerror
  • type: Function
  • callback function for error, default is function() {}
• redis
  • type: Object
  • redis options
• redis.port
  • type: Number
• redis.host
  • type: String
• redis.options
  • type: Object
  • see node_redis

set different expire for each route

const cache = require('koa-redis-cache')
const Koa = require('koa')
const app = new Koa()
 
const options = {
  routes: [{
    path: '/index',
    expire: 60
  }, {
    path: '/user',
    expire: 5
  }]
}
 
app.use(cache(options))

notes

• koa-redis-cache will set a custom http header X-Koa-Redis-Cache: true when the response is from cache

License

MIT