postcss/tasks/get.js

var request = require('request');
var zlib    = require('zlib');

module.exports = function (url, callback) {
    if ( url.match(/^github:/) ) {
        var parts = url.split(':');
        url = 'https://raw.githubusercontent.com/' +
            parts[1] + '/master/' + parts[2];
    }

    request.get({ url: url, headers: {'accept-encoding': 'gzip,deflate'} })
        .on('response', function (res) {
            var chunks = [];
            res.on('data', function (i) {
                chunks.push(i);
            });
            res.on('end', function () {
                var buffer = Buffer.concat(chunks);

                if ( res.headers['content-encoding'] == 'gzip' ) {
                    zlib.gunzip(buffer, function (err, decoded) {
                        callback(decoded.toString());
                    });

                } else if ( res.headers['content-encoding'] == 'deflate' ) {
                    zlib.inflate(buffer, function (err, decoded) {
                        callback(decoded.toString());
                    });

                } else {
                    callback(buffer.toString());
                }
            });
        });
};