docs: add note about rediss usage

Author: calebboyd

README.md

@@ -234,13 +234,15 @@ arguments. `createClient()` returns a `RedisClient` object. Otherwise,
 __Tip:__ If the Redis server runs on the same machine as the client consider
 using unix sockets if possible to increase throughput.
 
+__Note:__ Using `'rediss://...` for the protocol in a `redis_url` will enable a TLS socket connection. However, additional TLS options will need to be passed in `options`, if required.
+
 #### `options` object properties
 | Property  | Default   | Description |
 |-----------|-----------|-------------|
 | host      | 127.0.0.1 | IP address of the Redis server |
 | port      | 6379      | Port of the Redis server |
 | path      | null      | The UNIX socket string of the Redis server |
-| url       | null      | The URL of the Redis server. Format: `[redis:][rediss:]//[[user][:password@]][host][:port][/db-number][?db=db-number[&password=bar[&option=value]]]` (More info avaliable at [IANA](http://www.iana.org/assignments/uri-schemes/prov/redis)). |
+| url       | null      | The URL of the Redis server. Format: `[redis[s]:]//[[user][:password@]][host][:port][/db-number][?db=db-number[&password=bar[&option=value]]]` (More info avaliable at [IANA](http://www.iana.org/assignments/uri-schemes/prov/redis)). |
 | parser    | javascript | __Deprecated__ Use either the built-in JS parser [`javascript`]() or the native [`hiredis`]() parser. __Note__ `node_redis` < 2.6 uses hiredis as default if installed. This changed in v.2.6.0. |
 | string_numbers | null | Set to `true`, `node_redis` will return Redis number values as Strings instead of javascript Numbers. Useful if you need to handle big numbers (above `Number.MAX_SAFE_INTEGER === 2^53`). Hiredis is incapable of this behavior, so setting this option to `true` will result in the built-in javascript parser being used no matter the value of the `parser` option. |
 | return_buffers | false | If set to `true`, then all replies will be sent to callbacks as Buffers instead of Strings. |

lib/createClient.js

@@ -31,10 +31,10 @@ module.exports = function createClient (port_arg, host_arg, options) {
             if (parsed.auth) {
                 options.password = parsed.auth.split(':')[1];
             }
-            if (parsed.protocol && parsed.protocol !== 'redis:') {
+            if (parsed.protocol) {
                 if (parsed.protocol === 'rediss:') {
                     options.tls = options.tls || {};
-                } else {
+                } else if (parsed.protocol !== 'redis:') {
                     console.warn('node_redis: WARNING: You passed "' + parsed.protocol.substring(0, parsed.protocol.length - 1) + '" as protocol instead of the "redis" protocol!');
                 }
             }

test/tls.spec.js

@@ -7,6 +7,7 @@ var helper = require('./helper');
 var path = require('path');
 var redis = config.redis;
 var utils = require('../lib/utils');
+var tls = require('tls');
 
 var tls_options = {
     servername: 'redis.js.org',
@@ -90,12 +91,12 @@ describe('TLS connection tests', function () {
 
         it('connect with host and port provided in the tls object', function (done) {
             if (skip) this.skip();
-            var tls = utils.clone(tls_options);
-            tls.port = tls_port;
-            tls.host = 'localhost';
+            var tls_opts = utils.clone(tls_options);
+            tls_opts.port = tls_port;
+            tls_opts.host = 'localhost';
             client = redis.createClient({
                 connect_timeout: 1000,
-                tls: tls
+                tls: tls_opts
             });
 
             // verify connection is using TCP, not UNIX socket
@@ -109,17 +110,16 @@ describe('TLS connection tests', function () {
         });
 
         describe('using rediss as url protocol', function (done) {
-            var tls = require('tls')
-            var tlsConnect = tls.connect
+            var tls_connect = tls.connect
             beforeEach(function () {
                 tls.connect = function (options) {
                     options = utils.clone(options)
                     options.ca = tls_options.ca;
-                    return tlsConnect.call(tls, options);
+                    return tls_connect.call(tls, options);
                 }
             })
             afterEach(function () {
-                tls.connect = tlsConnect;
+                tls.connect = tls_connect;
             })
             it('connect with tls when rediss is used as the protocol', function (done) {
                 if (skip) this.skip();