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Hapijs brute force mitigation
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'use strict'; | |
/** | |
* Module dependencies. | |
*/ | |
const Hoek = require('hoek'); | |
const Limiter = require('ratelimiter'); | |
const RedisClient = require('../utils/redis'); | |
const ReplyUtil = require('../utils/reply'); | |
const internals = {}; | |
internals.defaults = { | |
namespace: 'hrl', | |
global: { | |
limit: -1, | |
duration: 1 | |
} | |
}; | |
const MILLISECONDS = 1000; | |
exports.register = (server, options, next) => { | |
const settings = Hoek.applyToDefaults(internals.defaults, options); | |
server.ext('onPreAuth', (request, reply) => { | |
const route = request.route; | |
const currentSettings = route.settings.plugins && route.settings.plugins['hapi-rate-limit']; | |
if (currentSettings) { | |
const routeSettings = Hoek.applyToDefaults(settings.global, currentSettings); | |
const id = settings.namespace + ':' + request.info.remoteAddress + ':' + route.path; | |
const limiter = new Limiter({ | |
id: id, | |
db: RedisClient, | |
max: routeSettings.limit, | |
duration: routeSettings.duration * MILLISECONDS | |
}); | |
limiter.get((err, limit) => { | |
if (err) { | |
return reply(err); | |
} | |
request.plugins['hapi-rate-limit'] = {}; | |
request.plugins['hapi-rate-limit'].limit = limit.total; | |
request.plugins['hapi-rate-limit'].remaining = limit.remaining - 1; | |
request.plugins['hapi-rate-limit'].reset = limit.reset; | |
if (limit.remaining <= 0) { | |
const error = ReplyUtil.tooManyRequests(); | |
error.output.headers['X-RateLimit-Limit'] = request.plugins['hapi-rate-limit'].limit; | |
error.output.headers['X-RateLimit-Remaining'] = request.plugins['hapi-rate-limit'].remaining; | |
error.output.headers['X-RateLimit-Reset'] = request.plugins['hapi-rate-limit'].reset; | |
return reply(error); | |
} | |
return reply.continue(); | |
}); | |
} else { | |
return reply.continue(); | |
} | |
}); | |
return next(); | |
}; | |
exports.register.attributes = { | |
name: 'hapi-rate-limit', | |
version: '1.0.0' | |
}; |
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