rate-limiter's Introduction

Rate-limiter

Rate limiter enables IP address based rate limiting for HTTP(s) requests.

HTTP methods supported:
GET
HEAD
POST
PUT
DELETE
ALL - includes all the supported methods mentioned above

Rate limiter allows you to:

Add a new limit for a given path and HTTP method:
var limiter = new RateLimiter();
limiter.addLimit('/test-path/', 'GET', 2, 500);
where,
'/test-path/' is the path
'GET' is the HTTP method the limit applies to
2 is the request count allowed per given period
500 is the time period for the request in seconds
Remove Limit:
limiter.removeLimit('/test-path/', 'GET');
where,
'/test-path/' is the path set on a limit
'GET' is the HTTP method associated with the path
Reset IP address access counter for the given IP address:
limiter.resetIpAddressAccessCounter('/test-path', 'GET', '127.0.0.1');
where,
'/test-path/' is the path set on a limit
'GET' is the HTTP method associated with the path
'127.0.0.1' is the IP address for which the counter will be reset
Process a request and execute callback if the limit is not reached, else drop the request:
var sampleReq = {'url': '/test-path/', 'method': 'GET', 'socket': {'remoteAddress': '127.0.0.1'}};
var sampleRes = {'writeHead': writeHead, 'end': end};
limiter.processRequest(sampleReq, sampleRes, callback);
where,
sampleReq is the request object sampleRes is the response object
callback is called with request and response if the limit is not reached