emptygif

Empty gif for nodejs

Usage example

var emptygif = require('emptygif');
var express = require('express');

app.use(emptygif.emptyGif([{path:'/erreport', maxAge: 0}]))

// OR
app.get('/tracking_pixel.gif', function(req, res, next) {
	
	process.nextTick(function() {
		// do tracking stuff
	});
	
	emptygif.sendEmptyGif(req, res, {
		'Content-Type' : 'image/gif',
		'Content-Length' : emptygif.emptyGifBufferLength,
		'Cache-Control' : 'public, max-age=0' // or specify expiry to make sure it will call everytime
	});
});

methods

emptyGif(configs)

• configs Array of objects. Each object contain path, maxAge and callback. Path can be string or RegExp. maxAge is optional, default 86400000ms. Callback is for doing something with request such as statistics. For example:

  [{path: '/img/empty.gif', maxAge : 86400000, callback: function(req) { /* view counting code */}}]

Returns

• function(req, res, next) middleware

sendEmptyGif(req, res, headers)

• req Request object
• res Response object
• headers Headers associated with this image.

Property

emptyGifBufferLength

The length of the image in case it is needed for customed headers for sendEmptyGif