http: allow createServer() to return a HTTPS server

This commit allows the http module to create a HTTPS server
if TLS options are passed to createServer() or the Server()
constructor.

doc/api/http.markdown

@@ -57,9 +57,11 @@ A collection of all the standard HTTP response status codes, and the
 short description of each.  For example, `http.STATUS_CODES[404] === 'Not
 Found'`.
 
-## http.createServer([requestListener])
+## http.createServer([options][, requestListener])
 
-Returns a new instance of [http.Server](#http_class_http_server).
+Returns a new instance of [http.Server](#http_class_http_server). If an `options` object containing valid TLS
+arguments is passed, then a HTTPS server will be returned based on the
+options.
 
 The `requestListener` is a function which is automatically
 added to the `'request'` event.

lib/_http_server.js

@@ -213,8 +213,25 @@ ServerResponse.prototype.writeHeader = function() {
 };
 
 
-function Server(requestListener) {
-  if (!(this instanceof Server)) return new Server(requestListener);
+var TLS_ARGS = ['pfx', 'key', 'passphrase', 'cert', 'ca', 'crl', 'ciphers',
+                'handshakeTimeout', 'honorCipherOrder', 'requestCert',
+                'rejectUnauthorized', 'NPNProtocols', 'SNICallback',
+                'sessionIdContext', 'secureProtocol', 'secureOptions'];
+
+function Server(options, requestListener) {
+  if (util.isObject(options)) {
+    // Only return an HTTPS server if valid TLS args are passed
+    for (var i = 0; i < TLS_ARGS.length; i++) {
+      if (options.hasOwnProperty(TLS_ARGS[i]))
+        return new require('https').Server(options, requestListener);
+    }
+  } else {
+    requestListener = options;
+  }
+
+  if (!(this instanceof Server))
+    return new Server(requestListener);
+
   net.Server.call(this, { allowHalfOpen: true });
 
   if (requestListener) {

lib/http.js

@@ -39,8 +39,8 @@ exports.get = function(options, cb) {
 exports._connectionListener = server._connectionListener;
 const Server = exports.Server = server.Server;
 
-exports.createServer = function(requestListener) {
-  return new Server(requestListener);
+exports.createServer = function(options, requestListener) {
+  return new Server(options, requestListener);
 };
 
 

test/parallel/test-http-server.js

@@ -46,6 +46,7 @@ var server = http.createServer(function(req, res) {
   }, 1);
 
 });
+assert(server instanceof http.Server);
 server.listen(common.PORT);
 
 server.httpAllowHalfOpen = true;
@@ -93,6 +94,9 @@ server.on('listening', function() {
   });
 });
 
+assert(http.createServer() instanceof http.Server);
+assert(http.createServer({foo: 1}) instanceof http.Server);
+
 process.on('exit', function() {
   assert.equal(4, request_number);
   assert.equal(4, requests_sent);

test/simple/test-https-from-http.js

@@ -0,0 +1,69 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+if (!process.versions.openssl) {
+  console.error('Skipping because node compiled without OpenSSL.');
+  process.exit(0);
+}
+
+var common = require('../common');
+var assert = require('assert');
+var fs = require('fs');
+var http = require('http');
+var https = require('https');
+
+var options = {
+  key: fs.readFileSync(common.fixturesDir + '/keys/agent1-key.pem'),
+  cert: fs.readFileSync(common.fixturesDir + '/keys/agent1-cert.pem')
+};
+
+var reqCount = 0;
+var body = 'test';
+
+var server = http.createServer(options, function(req, res) {
+  reqCount++;
+  res.writeHead(200, {'content-type': 'text/plain'});
+  res.end(body);
+});
+
+assert(server instanceof https.Server);
+
+server.listen(common.PORT, function() {
+  https.get({
+    port: common.PORT,
+    rejectUnauthorized: false
+  }, function(res) {
+    var data = '';
+
+    res.on('data', function(chunk) {
+      data += chunk.toString();
+    });
+
+    res.on('end', function() {
+      assert.equal(data, body);
+      server.close();
+    });
+  });
+});
+
+process.on('exit', function() {
+  assert.equal(1, reqCount);
+});