sqs http request

sqs-http.js

var _ = require('underscore');
var crypto = require('crypto');

var sign = function (type, queryUrl, parameters) {
    var raw = type + '\n';
    raw += url.parse(queryUrl).host + '\n';
    raw += url.parse(queryUrl).path + '\n';

    var sorted = _.map(parameters, function (v, k) {
        return [k, v];
    }).sort(function (item1, item2) {
        return item1[0].localeCompare(item2[0]);
    });

    raw += _.reduce(sorted, function (memo, pair) {
        return memo + (memo.length ? '&' : '') + pair[0] + '=' + encodeURIComponent(pair[1]);
    }, '');

    var hmac = crypto.createHmac('sha256', SECRET_ACCESS_KEY);
    hmac.update(raw);
    return hmac.digest('base64');
};

var parameters = {
    Action: 'ReceiveMessage',
    AWSAccessKeyId: ACCESS_KEY_ID,
    Version: '2012-11-05',
    Timestamp: new Date().toISOString(),
    SignatureVersion: 2,
    SignatureMethod: 'HmacSHA256'
};
parameters.Signature = sign('GET', this.queueUrl, parameters);
request.get({
    url: this.queueUrl,
    qs: parameters
}, function (err, res) {});