Install

npm install route-cache

yarn add route-cache

Route-Cache

Blazing fast :bullettrain_side: Express middleware for route caching with a given TTL (in seconds)

Why?

makes hard-working routes super-fast, under heavy-load, see Load Tests
defend against 'thundering herd'
supports various content-types
support for redirects
allows for conditional caching (per request)
works with gzip compression

Install

 npm install route-cache

Test

 npm test

How to use

 var routeCache = require('route-cache');

// cache route for 20 seconds
app.get('/index', routeCache.cacheSeconds(20), function(req, res){
  // do your dirty work here...
  console.log('you will only see this every 20 seconds.');
  res.send('this response will be cached');
});

By default req.originalUrl is used as the cache key so every URL is cached separately.

You can set a custom key by passing a second argument to cacheSeconds.

 routeCache.cacheSeconds(20, 'my-custom-cache-key')

You can set a dynamic key from the req and res objects by passing a function.

 // Cache authenticated and unauthenticated responses separately
routeCache.cacheSeconds(20, function(req, res) {
  return req.originalUrl + '|' + res.locals.signedIn
})

If you return false the response will not be cached.

 // Only cache unauthenticated responses
routeCache.cacheSeconds(20, function(req, res) {
  if (res.locals.signedIn) { return false }

  return req.originalUrl
})

Delete a cached route

 routeCache.removeCache('/index');

Use a distributed cache

 const Redis = require('ioredis')
const IoRedisStore = require('route-cache/ioRedisStore')


const redisClient = new Redis(6379, '127.0.0.1'))
const cacheStore = new IoRedisStore(redisClient)
routeCache.config({cacheStore})

Future plans / todos

client-side Cache-Control

The MIT License (MIT)

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.