feat: add support for rediss protocol in url

Author: calebboyd

README.md

@@ -240,7 +240,7 @@ using unix sockets if possible to increase throughput.
 | 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:]//[[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:][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)). |
 | 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

@@ -32,7 +32,11 @@ module.exports = function createClient (port_arg, host_arg, options) {
                 options.password = parsed.auth.split(':')[1];
             }
             if (parsed.protocol && 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!');
+                if (parsed.protocol === 'rediss:') {
+                    options.tls = options.tls || {};
+                } else {
+                    console.warn('node_redis: WARNING: You passed "' + parsed.protocol.substring(0, parsed.protocol.length - 1) + '" as protocol instead of the "redis" protocol!');
+                }
             }
             if (parsed.pathname && parsed.pathname !== '/') {
                 options.db = parsed.pathname.substr(1);

test/tls.spec.js

@@ -108,6 +108,29 @@ describe('TLS connection tests', function () {
             client.get('foo', helper.isString('bar', done));
         });
 
+        describe('using rediss as url protocol', function (done) {
+            var tls = require('tls')
+            var tlsConnect = tls.connect
+            beforeEach(function () {
+                tls.connect = function (options) {
+                    options = utils.clone(options)
+                    options.ca = tls_options.ca;
+                    return tlsConnect.call(tls, options);
+                }
+            })
+            afterEach(function () {
+                tls.connect = tlsConnect;
+            })
+            it('connect with tls when rediss is used as the protocol', function (done) {
+                if (skip) this.skip();
+                client = redis.createClient('rediss://localhost:' + tls_port);
+                // verify connection is using TCP, not UNIX socket
+                assert(client.stream.encrypted);
+                client.set('foo', 'bar');
+                client.get('foo', helper.isString('bar', done));
+            });
+        })
+
         it('fails to connect because the cert is not correct', function (done) {
             if (skip) this.skip();
             var faulty_cert = utils.clone(tls_options);