steplix-cache
v0.0.5
Published
Steplix Cache is a Node.js cache helper.
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Cache
steplix-cache is a Node.js cache helper.
Index
Download & Install
NPM
For use with redis
npm install steplix-cache redis
For use with memory cache
npm install steplix-cache memory-cache
Source code
$ git clone https://gitlab.com/comodinx/cache.git
$ cd cache
$ npm install
How is it used?
Configure
| Environment variable | Value | Default value |
|:--------------------------|:--------------|:--------------|
| CACHE_ENABLED | true/false | true
|
| CACHE_TYPE | memory/redis | 'memory'
|
Only for Redis
| Environment variable | Default value | Value | |:--------------------------|:--------------|:--------------| | CACHE_HOST | redis host | localhost | | CACHE_PORT | redis port | 6379 |
Only for API cache middleware
| Environment variable | Value | Default value |
|:--------------------------|:--------------------------|:------------------|
| CACHE_MIDDLEWARE_DURATION | number unit | '1 hour'
|
| CACHE_HEADER_CONTROL | cache control header name | 'cache-control'
|
const cache = require('steplix-cache');
// Simple usage
await cache.put('foo', 'bar');
const foo = await cache.get('foo');
console.log(foo);
// Expiration time usage
await cache.put('cash', 'yes', 100);
const cash = await cache.get('cash');
console.log('I have cash? ' + cash);
setTimeout(() => {
const cash = await cache.get('cash');
console.log('I have cash? ' + cash);
}, 200);
// Print on console:
//
// bar
// I have cash? yes
// I have cash? undefined
Middleware
Inspirated on apicache
API response caching middleware for Express/Node.
Simple usage
const { apicache } = require('steplix-cache');
const express = require('express');
const app = express();
const port = 3000;
app.use(apicache('1 hour'));
app.get('/', (req, res) => {
res.send({ foo: 'bar' });
});
app.listen(port, () => {
console.log(`Example app listening at http://localhost:${port}`);
});
Or at a specific endpoint.
const { apicache } = require('steplix-cache');
const express = require('express');
const app = express();
const port = 3000;
app.get('/', apicache('1 hour'), (req, res) => {
res.send({ foo: 'bar' });
});
app.listen(port, () => {
console.log(`Example app listening at http://localhost:${port}`);
});
Time format
{number} {unit time}
| Available unit time |
|:--------------------|
| m / ms
|
| minute / minutes
|
| hour / hours
|
| day / days
|
| week / weeks
|
| month / months
|
Available options
{
enabled: process.env.CACHE_ENABLED, // if false or undefined, turns off caching globally (useful on dev)
defaultDuration: process.env.CACHE_MIDDLEWARE_DURATION || '1 hour', // should be either a number (in ms) or a string, defaults to '1 hour'
headerCacheControl: process.env.CACHE_HEADER_CONTROL || 'cache-control', // should be either a string, defaults to 'cache-control'
respectCacheControl: process.env.CACHE_RESPECT_HEADER_CONTROL, // should be either a boolean (true | 1), defaults to false
cacheKey: req.originalUrl || req.url, // should be either a strong or a function (in function case, return a string custom key), defaults to req.originalUrl || req.url
statusCode: { // list of status codes that should never be cached
include: [],
exclude: []
},
headerBlacklist: [] // list of headers that should never be cached
}
Other ways of use
Use apicache
with custom options
app.get('/', apicache(), (req, res) => /* ... */);
// OR
app.get('/', apicache('2 hours', 'my-custom-cache-key'), (req, res) => /* ... */);
// OR
app.get(
'/',
apicache({
duration: '2 hours'
cacheKey: 'my-custom-cache-key'
}),
(req, res) => /* ... */
);
For only cache success responses, use apicache.ok
(status code between 200 - 299)
app.get('/', apicache.ok(), (req, res) => /* ... */);
// OR
app.get('/', apicache.ok('2 hours', 'my-custom-cache-key'), (req, res) => /* ... */);
// OR
app.get(
'/',
apicache.ok({
duration: '2 hours'
cacheKey: 'my-custom-cache-key'
}),
(req, res) => /* ... */
);
For only cache success responses, use apicache.ok
(status code between 200 - 299)
app.get('/', apicache.ok(), (req, res) => /* ... */);
// OR
app.get('/', apicache.ok('2 hours', 'my-custom-cache-key'), (req, res) => /* ... */);
// OR
app.get(
'/',
apicache.ok({
duration: '2 hours'
cacheKey: 'my-custom-cache-key'
}),
(req, res) => /* ... */
);
Tests
In order to see more concrete examples, I INVITE YOU TO LOOK AT THE TESTS :)
Run the unit tests
npm test