publish muk_session_store - 11.0

6 years ago · d621e2f30d
21 changed files with 1333 additions and 0 deletions
--- a/muk_session_store/LICENSE
+++ b/muk_session_store/LICENSE
@ -0,0 +1,619 @@
                    GNU AFFERO GENERAL PUBLIC LICENSE
                       Version 3, 19 November 2007
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--- a/muk_session_store/init.py
+++ b/muk_session_store/init.py
@ -0,0 +1,21 @@
 ###################################################################################
 #
 #    Copyright (C) 2017 MuK IT GmbH
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as
 #    published by the Free Software Foundation, either version 3 of the
 #    License, or (at your option) any later version.
 #
 #    This program is distributed in the hope that it will be useful,
 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #    GNU Affero General Public License for more details.
 #
 #    You should have received a copy of the GNU Affero General Public License
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 ###################################################################################
 def _patch_system():
    from . import patch
--- a/muk_session_store/manifest.py
+++ b/muk_session_store/manifest.py
@ -0,0 +1,51 @@
 ###################################################################################
 # 
 #    Copyright (C) 2017 MuK IT GmbH
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as
 #    published by the Free Software Foundation, either version 3 of the
 #    License, or (at your option) any later version.
 #
 #    This program is distributed in the hope that it will be useful,
 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #    GNU Affero General Public License for more details.
 #
 #    You should have received a copy of the GNU Affero General Public License
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 ###################################################################################
 {
    "name": "MuK Session Store",
    "summary": """Session Store Options""",
    "version": "11.0.1.0.0",
    "category": "Extra Tools",
    "license": "AGPL-3",
    "website": "http://www.mukit.at",
    'live_test_url': 'https://mukit.at/r/SgN',
    "author": "MuK IT",
    "contributors": [
        "Mathias Markl <mathias.markl@mukit.at>",
    ],
    "depends": [
        "base",
    ],
    "data": [
    ],
    "qweb": [
        "static/src/xml/*.xml",
    ],
    "images": [
        'static/description/banner.png'
    ],
    "external_dependencies": {
        "python": [],
        "bin": [],
    },
    "auto_install": True,
    "application": False,
    "installable": True,
    "post_load": "_patch_system",
 }
--- a/muk_session_store/doc/changelog.rst
+++ b/muk_session_store/doc/changelog.rst
@ -0,0 +1,4 @@
 `1.0.0`
 -------
 - Init version
--- a/muk_session_store/doc/index.rst
+++ b/muk_session_store/doc/index.rst
@ -0,0 +1,161 @@
 =================
 MuK Session Store
 =================
 In a distributed system the filestore based session store of Odoo has the problem that
 unwanted session timeouts occur regularly. This module offers two additional options for
 the Session Store. Sessions can be stored either in a Redis database or directly in
 Postgres. Both options have the advantage that the session information can also be queried
 in a distributed system.
 Requirements
 =============
 The requirements are only required if Redis is used as the session store.
 Redis
 -------------
 A interface to the Redis key-value store for Python. To install Redis please follow the 
 `instructions <https://github.com/andymccurdy/redis-py>`_ or install the library via pip.
 ``pip install redis``
 Installation
 ============
 To install this module, you need to:
 Download the module and add it to your Odoo addons folder. Afterward, log on to
 your Odoo server and go to the Apps menu. Trigger the debug mode and update the
 list by clicking on the "Update Apps List" link. Now install the module by
 clicking on the install button.
 Another way to install this module is via the package management for Python
 (`PyPI <https://pypi.org/project/pip/>`_).
 To install our modules using the package manager make sure
 `odoo-autodiscover <https://pypi.org/project/odoo-autodiscover/>`_ is installed
 correctly. Then open a console and install the module by entering the following
 command:
 ``pip install --extra-index-url https://nexus.mukit.at/repository/odoo/simple <module>``
 The module name consists of the Odoo version and the module name, where
 underscores are replaced by a dash.
 **Module:** 
 ``odoo<version>-addon-<module_name>``
 **Example:**
 ``sudo -H pip3 install --extra-index-url https://nexus.mukit.at/repository/odoo/simple odoo11-addon-muk-utils``
 Once the installation has been successfully completed, the app is already in the
 correct folder. Log on to your Odoo server and go to the Apps menu. Trigger the 
 debug mode and update the list by clicking on the "Update Apps List" link. Now
 install the module by clicking on the install button.
 The biggest advantage of this variant is that you can now also update the app
 using the "pip" command. To do this, enter the following command in your console:
 ``pip install --upgrade --extra-index-url https://nexus.mukit.at/repository/odoo/simple <module>``
 When the process is finished, restart your server and update the application in 
 Odoo. The steps are the same as for the installation only the button has changed
 from "Install" to "Upgrade".
 You can also view available Apps directly in our `repository <https://nexus.mukit.at/#browse/browse:odoo>`_
 and find a more detailed installation guide on our `website <https://mukit.at/page/open-source>`_.
 For modules licensed under OPL-1, you will receive access data when you purchase
 the module. If the modules were not purchased directly from
 `MuK IT <https://www.mukit.at/>`_ please contact our support (support@mukit.at)
 with a confirmation of purchase to receive the corresponding access data.
 Upgrade
 ============
 To upgrade this module, you need to:
 Download the module and add it to your Odoo addons folder. Restart the server
 and log on to your Odoo server. Select the Apps menu and upgrade the module by
 clicking on the upgrade button.
 If you installed the module using the "pip" command, you can also update the
 module in the same way. Just type the following command into the console:
 ``pip install --upgrade --extra-index-url https://nexus.mukit.at/repository/odoo/simple <module>``
 When the process is finished, restart your server and update the application in 
 Odoo, just like you would normally.
 Configuration
 =============
 Since this module need to be activated even if no database is selected it should
 be loaded right at the server start. This can be done by editing the configuration
 file or passing a load parameter to the start script.
 Parameter: ``--load=web,muk_session_store``
 The following fields can be modified in the config file:
 **Store:** 
 * session_store_database
 * session_store_redis
 **Postgres:** 
 * session_store_dbname
 **Redis:** 
 * session_store_prefix
 * session_store_host
 * session_store_port
 * session_store_dbindex
 * session_store_pass
 Usage
 =============
 After setting the parameters, the session store is used automatically.
 Credits
 =======
 Contributors
 ------------
 * Mathias Markl <mathias.markl@mukit.at>
 Images
 ------------
 Some pictures are based on or inspired by the icon set of Font Awesome:
 * `Font Awesome <https://fontawesome.com>`_
 Projects
 ------------
 Parts of the module are based on or inspired by:
 * `Session DB <https://github.com/odoo/odoo-extra>`_
 * `PSQL Session Store <https://github.com/it-projects-llc/misc-addons>`_
 * `Redis Session Store <https://github.com/Smile-SA/odoo_addons>`_
 Author & Maintainer
 -------------------
 This module is maintained by the `MuK IT GmbH <https://www.mukit.at/>`_.
 MuK IT is an Austrian company specialized in customizing and extending Odoo.
 We develop custom solutions for your individual needs to help you focus on
 your strength and expertise to grow your business.
 If you want to get in touch please contact us via mail
 (sale@mukit.at) or visit our website (https://mukit.at).
--- a/muk_session_store/patch/init.py
+++ b/muk_session_store/patch/init.py
@ -0,0 +1,20 @@
 ###################################################################################
 #
 #    Copyright (C) 2018 MuK IT GmbH
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as
 #    published by the Free Software Foundation, either version 3 of the
 #    License, or (at your option) any later version.
 #
 #    This program is distributed in the hope that it will be useful,
 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #    GNU Affero General Public License for more details.
 #
 #    You should have received a copy of the GNU Affero General Public License
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 ###################################################################################
 from . import http
--- a/muk_session_store/patch/http.py
+++ b/muk_session_store/patch/http.py
@ -0,0 +1,87 @@
 ###################################################################################
 #
 #    Copyright (C) 2018 MuK IT GmbH
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as
 #    published by the Free Software Foundation, either version 3 of the
 #    License, or (at your option) any later version.
 #
 #    This program is distributed in the hope that it will be useful,
 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #    GNU Affero General Public License for more details.
 #
 #    You should have received a copy of the GNU Affero General Public License
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 ###################################################################################
 import random
 import logging
 from odoo import http, tools
 from odoo.tools.func import lazy_property
 from odoo.addons.muk_utils.tools.patch import monkey_patch
 from odoo.addons.muk_session_store.store import postgres
 from odoo.addons.muk_session_store.store import redis
 _logger = logging.getLogger(__name__)
 try:
    import redis
 except ImportError:
    if tools.config.get('session_store_redis'):
        _logger.warning("The Python library redis is not installed.")
    redis = False
 def get_session_store_database():
    return tools.config.get('session_store_dbname', 'session_store')
@monkey_patch(http)
 def db_monodb(httprequest=None):
    if tools.config.get('session_store_database'):
        httprequest = httprequest or request.httprequest
        dbs = http.db_list(True, httprequest)
        store = get_session_store_database()
        db_session = httprequest.session.db
        if db_session in dbs:
            return db_session
        if store in dbs: 
            dbs.remove(store)
        if len(dbs) == 1:
            return dbs[0]
        return None
    else:
        db_monodb.super(httprequest)
@monkey_patch(http)
 def db_filter(dbs, httprequest=None):
    dbs = db_filter.super(dbs, httprequest=httprequest)
    store = get_session_store_database()
    if store in dbs: 
        dbs.remove(store)
    return dbs
@monkey_patch(http)
 def session_gc(session_store):
    if tools.config.get('session_store_database'):
        if random.random() < 0.001:
            session_store.clean()
    elif tools.config.get('session_store_redis'):
        pass
    else:
        session_gc.super(session_store)
 class Root(http.Root):
    @lazy_property
    def session_store(self):
        if tools.config.get('session_store_database'):
            return postgres.PostgresSessionStore(session_class=http.OpenERPSession)
        elif tools.config.get('session_store_redis') and redis:
            return redis.RedisSessionStore(session_class=http.OpenERPSession)
        return super(Root, self).session_store
 http.root = Root()
--- a/muk_session_store/static/description/banner.png
+++ b/muk_session_store/static/description/banner.png
--- a/muk_session_store/static/description/icon.png
+++ b/muk_session_store/static/description/icon.png
--- a/muk_session_store/static/description/icon.svg
+++ b/muk_session_store/static/description/icon.svg
@ -0,0 +1 @@
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--- a/muk_session_store/static/description/index.html
+++ b/muk_session_store/static/description/index.html
@ -0,0 +1,134 @@
 <section class="oe_container">
 	<div class="oe_row oe_spaced">
 		<h2 class="oe_slogan">MuK Session Store</h2>
 		<h3 class="oe_slogan">Session Store Options</h3>
 		<h4 class="oe_slogan" style="font-size: 23px;">MuK IT GmbH -
 			www.mukit.at</h4>
 	</div>
 </section>
 <section class="oe_container">
 	<div class="oe_row oe_spaced">
 		<div style="max-width: 84%; margin: 16px 8%;">
 			<h3 class="oe_slogan">Overview</h3>
 			<p class="oe_mt32">In a distributed system the filestore based
 				session store of Odoo has the problem that unwanted session timeouts
 				occur regularly. This module offers two additional options for the
 				Session Store. Sessions can be stored either in a Redis database or
 				directly in Postgres. Both options have the advantage that the
 				session information can also be queried in a distributed system.</p>
 			<p>Since this module need to be activated even if no database is
 				selected it should be loaded right at the server start. This can be
 				done by editing the configuration file or passing a load parameter
 				to the start script.</p>
 			<p>
 				Parameter:
 				<code>--load=web,muk_session_store</code>
 			</p>
 		</div>
 	</div>
 </section>
 <section class="oe_container oe_dark">
 	<div class="oe_row oe_spaced">
 		<h3 class="oe_slogan">Our Services</h3>
 		<div
 			style="display: flex; padding-top: 20px; justify-content: space-between;">
 			<div style="flex-basis: 18%;">
 				<a href="https://mukit.at/r/MQ5" target="_blank">
 					<div
 						style="width: 75px; height: 75px; border-radius: 100%; margin: auto;">
 						<img src="service_implementation.png"
 							style="width: 100%; border-radius: 100%;">
 					</div>
 					<h3 class="oe_slogan"
 						style="text-align: center; font-size: 14px; width: 100%; margin: 0; margin-top: 14px; color: #000 !important; margin-top: 5px; opacity: 1 !important; line-height: 17px;">
 						Odoo <br>Implementation
 					</h3>
 				</a>
 			</div>
 			<div style="flex-basis: 18%;">
 				<a href="https://mukit.at/r/u7c" target="_blank">
 					<div
 						style="width: 75px; height: 75px; border-radius: 100%; margin: auto;">
 						<img src="service_integration.png"
 							style="width: 100%; border-radius: 100%;">
 					</div>
 					<h3 class="oe_slogan"
 						style="text-align: center; font-size: 14px; width: 100%; margin: 0; margin-top: 14px; color: #000 !important; margin-top: 5px; opacity: 1 !important; line-height: 17px;">
 						Odoo <br>Integration
 					</h3>
 				</a>
 			</div>
 			<div style="flex-basis: 18%;">
 				<a href="https://mukit.at/r/xDJ" target="_blank">
 					<div
 						style="width: 75px; height: 75px; border-radius: 100%; margin: auto;">
 						<img src="service_customization.png"
 							style="width: 100%; border-radius: 100%;">
 					</div>
 					<h3 class="oe_slogan"
 						style="text-align: center; font-size: 14px; width: 100%; margin: 0; margin-top: 14px; color: #000 !important; margin-top: 5px; opacity: 1 !important; line-height: 17px;">
 						Odoo <br>Customization
 					</h3>
 				</a>
 			</div>
 			<div style="flex-basis: 18%;">
 				<a href="	https://mukit.at/r/J3A" target="_blank">
 					<div
 						style="width: 75px; height: 75px; border-radius: 100%; margin: auto;">
 						<img src="service_development.png"
 							style="width: 100%; border-radius: 100%;">
 					</div>
 					<h3 class="oe_slogan"
 						style="text-align: center; font-size: 14px; width: 100%; margin: 0; margin-top: 14px; color: #000 !important; margin-top: 5px; opacity: 1 !important; line-height: 17px;">
 						Odoo <br>Development
 					</h3>
 				</a>
 			</div>
 			<div style="flex-basis: 18%;">
 				<a href="	https://mukit.at/r/R1v" target="_blank">
 					<div
 						style="width: 75px; height: 75px; border-radius: 100%; margin: auto;">
 						<img src="service_support.png"
 							style="width: 100%; border-radius: 100%;">
 					</div>
 					<h3 class="oe_slogan"
 						style="text-align: center; font-size: 14px; width: 100%; margin: 0; margin-top: 14px; color: #000 !important; margin-top: 5px; opacity: 1 !important; line-height: 17px;">
 						Odoo <br>Support
 					</h3>
 				</a>
 			</div>
 		</div>
 	</div>
 </section>
 <section class="oe_container" style="padding: 32px 0;">
 	<div class="oe_row oe_spaced" style="margin: auto;">
 		<div class="oe_demo oe_picture oe_screenshot">
 			<a href="https://mukit.at/r/SgN" target="_blank"> <img
 				src="preview.png">
 			</a>
 		</div>
 	</div>
 </section>
 <section class="oe_container oe_dark">
 	<h3 class="oe_slogan">Help and Support</h3>
 	<h5 class="oe_slogan" style="font-size: 20px;">Feel free to
 		contact us, if you need any help with your Odoo integration or
 		addiontal features.</h5>
 	<div class="oe_slogan">
 		<a class="btn btn-primary btn-lg mt8" href="https://mukit.at"
 			target="_blank"> <i class="fa fa-globe"></i> Website
 		</a> <a class="btn btn-primary btn-lg mt8" href="mailto:sale@mukit.at">
 			<i class="fa fa-envelope"></i> Contact Us
 		</a> <a class="btn btn-primary btn-lg mt8"
 			href="https://github.com/muk-it" target="_blank"> <i
 			class="fa fa-github"></i> Issues
 		</a>
 	</div>
 	<img src="logo.png"
 		style="width: 200px; margin-bottom: 20px; display: block;"
 		class="mx-auto center-block">
 </section>
--- a/muk_session_store/static/description/logo.png
+++ b/muk_session_store/static/description/logo.png
--- a/muk_session_store/static/description/preview.png
+++ b/muk_session_store/static/description/preview.png
--- a/muk_session_store/static/description/service_customization.png
+++ b/muk_session_store/static/description/service_customization.png
--- a/muk_session_store/static/description/service_development.png
+++ b/muk_session_store/static/description/service_development.png
--- a/muk_session_store/static/description/service_implementation.png
+++ b/muk_session_store/static/description/service_implementation.png
--- a/muk_session_store/static/description/service_integration.png
+++ b/muk_session_store/static/description/service_integration.png
--- a/muk_session_store/static/description/service_support.png
+++ b/muk_session_store/static/description/service_support.png
--- a/muk_session_store/store/init.py
+++ b/muk_session_store/store/init.py
@ -0,0 +1,21 @@
 ###################################################################################
 #
 #    Copyright (C) 2017 MuK IT GmbH
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as
 #    published by the Free Software Foundation, either version 3 of the
 #    License, or (at your option) any later version.
 #
 #    This program is distributed in the hope that it will be useful,
 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #    GNU Affero General Public License for more details.
 #
 #    You should have received a copy of the GNU Affero General Public License
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 ###################################################################################
 from . import postgres
 from . import redis
--- a/muk_session_store/store/postgres.py
+++ b/muk_session_store/store/postgres.py
@ -0,0 +1,121 @@
 ###################################################################################
 #
 #    Copyright (C) 2017 MuK IT GmbH
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as
 #    published by the Free Software Foundation, either version 3 of the
 #    License, or (at your option) any later version.
 #
 #    This program is distributed in the hope that it will be useful,
 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #    GNU Affero General Public License for more details.
 #
 #    You should have received a copy of the GNU Affero General Public License
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 ###################################################################################
 import json
 import logging
 import psycopg2
 import functools
 from contextlib import closing
 from werkzeug.contrib.sessions import SessionStore
 from odoo.sql_db import db_connect
 from odoo.tools import config
 _logger = logging.getLogger(__name__)
 def ensure_cursor(func):
    @functools.wraps(func)
    def wrapper(self, *args, **kwargs):
        for attempts in range(1, 6):
            try:
                return func(self, *args, **kwargs)
            except psycopg2.InterfaceError as error:
                _logger.info("SessionStore connection failed! (%s/5)" % attempts)
                if attempts < 5:
                    self._open_connection()
                else:
                    raise error
    return wrapper
 class PostgresSessionStore(SessionStore):
    def __init__(self, *args, **kwargs):
        super(PostgresSessionStore, self).__init__(*args, **kwargs)
        self.dbname = config.get('session_store_dbname', 'session_store')
        self._open_connection()
        self._setup_db()
    def _create_database(self):
        with closing(db_connect("postgres").cursor()) as cursor:
            cursor.autocommit(True)
            cursor.execute("""
                CREATE DATABASE {dbname} 
                ENCODING 'unicode'
                TEMPLATE 'template0';
            """.format(dbname=self.dbname))
        self._setup_db()
    def _open_connection(self, create_db=True):
        try:
            connection = db_connect(self.dbname, allow_uri=True)
            self.cursor = connection.cursor()
            self.cursor.autocommit(True)
        except:
            if not create_db:
                raise
            self._create_database()
            return self._open_connection(create_db=False)
    @ensure_cursor
    def _setup_db(self):
        self.cursor.execute("""
            CREATE TABLE IF NOT EXISTS sessions (
                sid varchar PRIMARY KEY,
                write_date timestamp without time zone NOT NULL,
                payload text NOT NULL
            );
        """)
    @ensure_cursor
    def save(self, session):
        self.cursor.execute("""
            INSERT INTO sessions (sid, write_date, payload)
            VALUES (%(sid)s, now() at time zone 'UTC', %(payload)s)
            ON CONFLICT (sid)
            DO UPDATE SET payload = %(payload)s, write_date = now() at time zone 'UTC';
        """, dict(sid=session.sid, payload=json.dumps(dict(session))))
    @ensure_cursor
    def delete(self, session):
        self.cursor.execute("DELETE FROM sessions WHERE sid=%s;", [session.sid])
    @ensure_cursor
    def get(self, sid):
        if not self.is_valid_key(sid):
            return self.new()
        self.cursor.execute("UPDATE sessions SET write_date = now() at time zone 'UTC' WHERE sid=%s;", [sid])
        self.cursor.execute("SELECT payload FROM sessions WHERE sid=%s;", [sid])
        try:
            return self.session_class(json.loads(self.cursor.fetchone()[0]), sid, False)
        except Exception:
            return self.session_class({}, sid, False)
    @ensure_cursor
    def list(self):
        self.cursor.execute("SELECT sid FROM sessions;")
        return [record[0] for record in self.cursor.fetchall()]
    @ensure_cursor
    def clean(self):
        self.cursor.execute("""
            DELETE FROM sessions 
            WHERE now() at time zone 'UTC' - write_date > '7 days';
        """)
--- a/muk_session_store/store/redis.py
+++ b/muk_session_store/store/redis.py
@ -0,0 +1,93 @@
 import json
 ###################################################################################
 #
 #    Copyright (C) 2017 MuK IT GmbH
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU Affero General Public License as
 #    published by the Free Software Foundation, either version 3 of the
 #    License, or (at your option) any later version.
 #
 #    This program is distributed in the hope that it will be useful,
 #    but WITHOUT ANY WARRANTY; without even the implied warranty of
 #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 #    GNU Affero General Public License for more details.
 #
 #    You should have received a copy of the GNU Affero General Public License
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 ###################################################################################
 import pickle
 import logging
 import functools
 from werkzeug.contrib.sessions import SessionStore
 from odoo.tools import config
 _logger = logging.getLogger(__name__)
 try:
    import redis
 except ImportError:
    pass
 SESSION_TIMEOUT = 60 * 60 * 24 * 7
 def ensure_server(func):
    @functools.wraps(func)
    def wrapper(self, *args, **kwargs):
        for attempts in range(1, 6):
            try:
                return func(self, *args, **kwargs)
            except redis.ConnectionError as error:
                _logger.info("SessionStore connection failed! (%s/5)" % attempts)
                if attempts >= 5:
                    raise error
    return wrapper
 class RedisSessionStore(SessionStore):
    def __init__(self, *args, **kwargs):
        super(RedisSessionStore, self).__init__(*args, **kwargs)
        self.prefix = config.get('session_store_prefix', '')
        self.server = redis.Redis(
            host=config.get('session_store_host', 'localhost'),
            port=int(config.get('session_store_port', 6379)),
            db=int(config.get('session_store_dbindex', 1)),
            password=config.get('session_store_pass', None)
        )
        self._check_server()
    def _encode_session_key(self, kex):
        return key.encode('utf-8') if isinstance(key, str) else key
    def _get_session_key(self, sid):
        return self._encode_session_key(self.key_prefix + sid)
    @ensure_server
    def _check_server(self):
        self.server.ping()
    @ensure_server
    def save(self, session):
        key = self._get_session_key(session.sid)
        payload = pickle.dumps(dict(session), pickle.HIGHEST_PROTOCOL)
        self.server.setex(name=key, value=payload, time=SESSION_TIMEOUT)
    @ensure_server
    def delete(self, session):
        self.server.delete(self._get_session_key(session.sid))
    @ensure_server
    def get(self, sid):
        if not self.is_valid_key(sid):
            return self.new()
        key = self._get_session_key(sid)
        payload = self.server.get(key)
        if payload:
            self.server.setex(name=key, value=payload, time=SESSION_TIMEOUT)
            return self.session_class(pickle.loads(payload), sid, False)
        else:
            return self.session_class({}, sid, False)