CredentialsProvider class added to support password rotation (#2261)

* A CredentialsProvider class has been added to allow the user to add his own provider for password rotation

* Moved CredentialsProvider to a separate file, added type hints

* Changed username and password to properties

* Added: StaticCredentialProvider, examples, tests
Changed: CredentialsProvider to CredentialProvider
Fixed: calling AUTH only with password

* Changed private members' prefix to __

* fixed linters

* fixed auth test

* fixed credential test

* Raise an error if username or password are passed along with credential_provider

* fixing linters

* fixing test

* Changed dundered to single per side underscore

* Changed Connection class members username and password to properties to enable backward compatibility with changing the members value on existing connection.

* Reverting last commit and adding backward compatibility to 'username' and 'password' inside on_connect function

* Refactored CredentialProvider class

* Fixing tuple type to Tuple

* Fixing optional string members in UsernamePasswordCredentialProvider

* Fixed credential test

* Added credential provider support to AsyncRedis

* linters

* linters

* linters

* linters - black

Co-authored-by: dvora-h <67596500+dvora-h@users.noreply.github.com>
Co-authored-by: dvora-h <dvora.heller@redis.com>

Author: barshaul

CHANGES

@@ -24,6 +24,7 @@
     * ClusterPipeline Doesn't Handle ConnectionError for Dead Hosts (#2225)
     * Remove compatibility code for old versions of Hiredis, drop Packaging dependency
     * The `deprecated` library is no longer a dependency
+    * Added CredentialsProvider class to support password rotation
     * Enable Lock for asyncio cluster mode
 
 * 4.1.3 (Feb 8, 2022)

docs/examples/asyncio_examples.ipynb

@@ -21,11 +21,6 @@
   {
    "cell_type": "code",
    "execution_count": 1,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
    "outputs": [
     {
      "name": "stdout",
@@ -41,27 +36,29 @@
     "connection = redis.Redis()\n",
     "print(f\"Ping successful: {await connection.ping()}\")\n",
     "await connection.close()"
-   ]
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   }
   },
   {
    "cell_type": "markdown",
+   "source": [
+    "If you supply a custom `ConnectionPool` that is supplied to several `Redis` instances, you may want to disconnect the connection pool explicitly. Disconnecting the connection pool simply disconnects all connections hosted in the pool."
+   ],
    "metadata": {
+    "collapsed": false,
     "pycharm": {
      "name": "#%% md\n"
     }
-   },
-   "source": [
-    "If you supply a custom `ConnectionPool` that is supplied to several `Redis` instances, you may want to disconnect the connection pool explicitly. Disconnecting the connection pool simply disconnects all connections hosted in the pool."
-   ]
+   }
   },
   {
    "cell_type": "code",
    "execution_count": 2,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
    "outputs": [],
    "source": [
     "import redis.asyncio as redis\n",
@@ -70,15 +67,16 @@
     "await connection.close()\n",
     "# Or: await connection.close(close_connection_pool=False)\n",
     "await connection.connection_pool.disconnect()"
-   ]
-  },
-  {
-   "cell_type": "markdown",
+   ],
    "metadata": {
+    "collapsed": false,
     "pycharm": {
-     "name": "#%% md\n"
+     "name": "#%%\n"
     }
-   },
+   }
+  },
+  {
+   "cell_type": "markdown",
    "source": [
     "## Transactions (Multi/Exec)\n",
     "\n",
@@ -87,16 +85,17 @@
     "The commands will not be reflected in Redis until execute() is called & awaited.\n",
     "\n",
     "Usually, when performing a bulk operation, taking advantage of a “transaction” (e.g., Multi/Exec) is to be desired, as it will also add a layer of atomicity to your bulk operation."
-   ]
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%% md\n"
+    }
+   }
   },
   {
    "cell_type": "code",
    "execution_count": 3,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
    "outputs": [],
    "source": [
     "import redis.asyncio as redis\n",
@@ -106,25 +105,31 @@
     "    ok1, ok2 = await (pipe.set(\"key1\", \"value1\").set(\"key2\", \"value2\").execute())\n",
     "assert ok1\n",
     "assert ok2"
-   ]
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   }
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
    "source": [
     "## Pub/Sub Mode\n",
     "\n",
     "Subscribing to specific channels:"
-   ]
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%% md\n"
+    }
+   }
   },
   {
    "cell_type": "code",
    "execution_count": 4,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
    "outputs": [
     {
      "name": "stdout",
@@ -165,23 +170,29 @@
     "    await r.publish(\"channel:1\", STOPWORD)\n",
     "\n",
     "    await future"
-   ]
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   }
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
    "source": [
     "Subscribing to channels matching a glob-style pattern:"
-   ]
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%% md\n"
+    }
+   }
   },
   {
    "cell_type": "code",
    "execution_count": 5,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
    "outputs": [
     {
      "name": "stdout",
@@ -223,11 +234,16 @@
     "    await r.publish(\"channel:1\", STOPWORD)\n",
     "\n",
     "    await future"
-   ]
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   }
   },
   {
    "cell_type": "markdown",
-   "metadata": {},
    "source": [
     "## Sentinel Client\n",
     "\n",
@@ -236,16 +252,17 @@
     "Calling aioredis.sentinel.Sentinel.master_for or aioredis.sentinel.Sentinel.slave_for methods will return Redis clients connected to specified services monitored by Sentinel.\n",
     "\n",
     "Sentinel client will detect failover and reconnect Redis clients automatically."
-   ]
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%% md\n"
+    }
+   }
   },
   {
    "cell_type": "code",
    "execution_count": null,
-   "metadata": {
-    "pycharm": {
-     "name": "#%%\n"
-    }
-   },
    "outputs": [],
    "source": [
     "import asyncio\n",
@@ -260,7 +277,13 @@
     "assert ok\n",
     "val = await r.get(\"key\")\n",
     "assert val == b\"value\""
-   ]
+   ],
+   "metadata": {
+    "collapsed": false,
+    "pycharm": {
+     "name": "#%%\n"
+    }
+   }
   }
  ],
  "metadata": {
@@ -284,4 +307,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 1
-}
+}