Express Bouncer

Installation

$ npm install express-bouncer

Quick Start

// Creates a new instance of our bouncer (args optional)
var bouncer = require ("express-bouncer")(500, 900000);

// Add white-listed addresses (optional)
bouncer.whitelist.push ("127.0.0.1");

// In case we want to supply our own error (optional)
bouncer.blocked = function (req, res, next, remaining)
{
	res.send (429, "Too many requests have been made, " +
		"please wait " + remaining / 1000 + " seconds");
};

// Route we wish to protect with bouncer middleware
app.post ("/login", bouncer.block, function (req, res)
{
	if (LoginFailed)
	{
		// Login failed
	}

	else
	{
		bouncer.reset (req);
		// Login succeeded
	}
});

// Clear all logged addresses
// (Usually never really used)
bouncer.addresses = { };

Documentation

Constructor

express-bouncer ([min], [max], [free])

• min The minimum number of milliseconds the user can be forced to wait. (default: 500 ms)
• max The maximum number of milliseconds the user can be forced to wait. (default: 10 min)
• free The number of attempts a user can make before being forced to wait. (default: 2)

Functions

• reset Resets the wait time between attempts for the specified request.
• block Middleware that will block requests which are occurring too often.

Properties

• addresses A list of logged IP addresses. Cleared by overriding with new object.
• whitelist A list of white-listed IP addresses. These addresses will never be blocked.
• blocked Function to be called when a request has been blocked. (see quick start)

Author

• Email: [email protected]
• Home: dave.krutsko.net
• GitHub: github.com/dkrutsko