check if request IP come from Cloudflare
npm install @cylution/is-cloudflare-iplittle module to validate ip come from Cloudflare
typescript
import { CloudflareIP } from '@cylution/is-cloudflare-ip'
// js
// const { CloudflareIP } = require('@cylution/ip-cloudflare-ip')/**
* Cloudflare ip list
* IPv4: https://www.cloudflare.com/ips-v4
* IPv6: https://www.cloudflare.com/ips-v6
*/
const cloudflareIP = new CloudflareIP({
v4: [], // initial cidr ipv4 list
v6: [], // initial cidr ipv6 list
})
await cloudflareIP.update() // update latest list from Cloudflare
/**
* use cached list Sep, 06 2021
* const cloudflareIP = new CloudflareIP()
*/
// P/S: list demo stolen from https://www.npmjs.com/package/cloudflare-ip
// validate should detect ip v4 or v6
cloudflareIP.validate('103.21.244.0') // true
cloudflareIP.validate('2400:cb00:0000::0000') // true
cloudflareIP.validate('noop') // false
cloudflareIP.validate('127.0.0.1') // false
// v4 only
cloudflareIP.validateV4('103.21.244.0') // true
cloudflareIP.validateV4('2400:cb00:0000::0000') // false
// v6 only
cloudflareIP.validateV6('103.21.244.0') // false
cloudflareIP.validateV6('2400:cb00:0000::0000') // true
`Methods
update(interval?: number, onError?: Function) - Update subnet list
*
do fetch list after a specified number of milliseconds (using setTimeout). Must greater than 0
* onError: (error) => void` call if update list faileddestroyInterval() - destroy interval update
validate(ip: string) check if IP (both v4/v6) is valid and come from Cloudflare
validateV4(ipV4: string) check if IP is V4 and come from Cloudflare
validateV6(ipV6: string) check if IP is V6 and come from Cloudflare