Adding initial code for SES support. Will now test.

lib/engines/SES.js

@@ -0,0 +1,100 @@
+var http = require('http');
+var https = require('https');
+var crypto = require('crypto');
+
+//Taken shamelessly from the [MDN](https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Date)
+function ISODateString(d){
+	function pad(n){return n<10 ? '0'+n : n}
+ 	return d.getUTCFullYear()+'-'
+		+ pad(d.getUTCMonth()+1)+'-'
+		+ pad(d.getUTCDate())+'T'
+		+ pad(d.getUTCHours())+':'
+		+ pad(d.getUTCMinutes())+':'
+		+ pad(d.getUTCSeconds())+'Z'
+}
+
+//Extracts the hostname from a given URL
+function getHostname(url) {
+	return url.replace(/^https?:\/\/([^\/]*)\/.*$/, "$1");
+}
+
+//Custom keyValPair construction that ignores "special" config keys
+function buildKeyValPairs(config) {
+	var keyValPairs = [];
+	for(var key in config) {
+		if(key != "ServiceUrl" && key != "AWSSecretKey") {
+			keyValPairs.push((key + "=" + config[key]));
+		}
+	}
+	return keyValPairs.join("&");
+}
+
+//Following the SES.pm signature implementation since Amazon's documentation sucks
+function buildV2Signature(config) {
+	var sha256 = crypto.createHash('sha256');
+	sha256.update(
+		"POST\n" +
+		getHostname(config.ServiceUrl) +
+		"\n/\n" +
+		buildKeyValPairs(config) +
+		config.AWSSecretKey
+	);
+	return sha256.digest('base64');
+}
+
+//Adds the callback to the response handler's scope
+function buildResponseHandler(callback) {
+	return function(response) {
+		var body = "";
+		console.log(response);
+		//Re-assembles response data
+		response.on('data', function(d) {
+			body += d;
+		});
+		//Performs error handling and executes callback, if it exists
+		response.on('close', function(err) {
+			if(err instanceof Error) {
+				return callback && callback(err, null);
+			}
+			if(response.statusCode != 200) {
+				return callback &&
+					callback(new Error('Email failed: ' + response.statusCode + '\n' + body), null);
+			}
+			return callback && callback(null, body);
+		});
+	};
+}
+
+//Constructs the email to be send and sends it to Amazon SES
+exports.send = function(emailMessage, config, callback) {
+	var email = "";
+	var path = "/?";
+	var hostname = "";
+	//Check if required config settings set
+	if(!config.AWSAccessKeyID || !config.AWSSecretKey) {
+		return callback(new Error("Missing AWS Credentials"));
+	}
+	//Set defaults if necessary
+	config.ServiceUrl = config.ServiceUrl || "https://email.us-east-1.amazonaws.com";
+	config.Timestamp = config.Timestamp || ISODateString(new Date());
+	//Build Email
+	emailMessage.prepareVariables();
+	email = emailMessage.generateHeaders() + "\r\n\r\n" + emailMessage.generateBody();
+	//Unchangeable configuration settings for SES
+	config.Version = '2010-12-01';
+	config.SignatureVersion = '2';
+	config.SignatureMethod = 'HmacSHA256';
+	config.Action = 'SendRawEmail';
+	config['RawMessage.Data'] = email;
+	config.Signature = buildV2Signature(config);
+	//Construct the http/https request object
+	path += buildKeyValPairs(config);
+	hostname = getHostname(config.ServiceUrl);
+	var reqObj = {hostname: hostname, path: path};
+	//Execute the request on the correct protocol
+	if(/^https:/.test(config.ServiceUrl) {
+		https.get(reqObj, buildResponseHandler(callback));
+	} else {
+		http.get(reqObj, buildResponseHandler(callback));
+	}
+};