Merge PR OCA#2754 into 17.0

Signed-off-by sbidoul

session_db/README.rst

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+====================
+Store sessions in DB
+====================
+
+.. 
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! This file is generated by oca-gen-addon-readme !!
+   !! changes will be overwritten.                   !!
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+   !! source digest: sha256:0e92dd612d4d3860e95f5c06e6b9ea02c10fc402034c328effb4a9ac44b9cb73
+   !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+
+.. |badge1| image:: https://img.shields.io/badge/maturity-Beta-yellow.png
+    :target: https://odoo-community.org/page/development-status
+    :alt: Beta
+.. |badge2| image:: https://img.shields.io/badge/licence-LGPL--3-blue.png
+    :target: http://www.gnu.org/licenses/lgpl-3.0-standalone.html
+    :alt: License: LGPL-3
+.. |badge3| image:: https://img.shields.io/badge/github-OCA%2Fserver--tools-lightgray.png?logo=github
+    :target: https://github.com/OCA/server-tools/tree/17.0/session_db
+    :alt: OCA/server-tools
+.. |badge4| image:: https://img.shields.io/badge/weblate-Translate%20me-F47D42.png
+    :target: https://translation.odoo-community.org/projects/server-tools-17-0/server-tools-17-0-session_db
+    :alt: Translate me on Weblate
+.. |badge5| image:: https://img.shields.io/badge/runboat-Try%20me-875A7B.png
+    :target: https://runboat.odoo-community.org/builds?repo=OCA/server-tools&target_branch=17.0
+    :alt: Try me on Runboat
+
+|badge1| |badge2| |badge3| |badge4| |badge5|
+
+Store sessions in a database instead of the filesystem. This simplifies
+the configuration of horizontally scalable deployments, by avoiding the
+need for a distributed filesystem to store the Odoo sessions.
+
+**Table of contents**
+
+.. contents::
+   :local:
+
+Usage
+=====
+
+Set this module in the server wide modules.
+
+Set a ``SESSION_DB_URI`` environment variable as a full postgresql
+connection string, like ``postgres://user:passwd@server/db`` or ``db``.
+
+It is recommended to use a dedicated database for this module, and
+possibly a dedicated postgres user for additional security.
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues <https://github.com/OCA/server-tools/issues>`_.
+In case of trouble, please check there if your issue has already been reported.
+If you spotted it first, help us to smash it by providing a detailed and welcomed
+`feedback <https://github.com/OCA/server-tools/issues/new?body=module:%20session_db%0Aversion:%2017.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+
+Do not contact contributors directly about support or help with technical issues.
+
+Credits
+=======
+
+Authors
+-------
+
+* Odoo SA
+* ACSONE SA/NV
+
+Maintainers
+-----------
+
+This module is maintained by the OCA.
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+.. |maintainer-sbidoul| image:: https://github.com/sbidoul.png?size=40px
+    :target: https://github.com/sbidoul
+    :alt: sbidoul
+
+Current `maintainer <https://odoo-community.org/page/maintainer-role>`__:
+
+|maintainer-sbidoul| 
+
+This module is part of the `OCA/server-tools <https://github.com/OCA/server-tools/tree/17.0/session_db>`_ project on GitHub.
+
+You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.

session_db/__init__.py

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+from . import pg_session_store

session_db/__manifest__.py

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+{
+    "name": "Store sessions in DB",
+    "version": "17.0.1.0.0",
+    "author": "Odoo SA,ACSONE SA/NV,Odoo Community Association (OCA)",
+    "license": "LGPL-3",
+    "website": "https://github.com/OCA/server-tools",
+    "maintainers": ["sbidoul"],
+}

session_db/i18n/session_db.pot

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+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 16.0\n"
+"Report-Msgid-Bugs-To: \n"
+"Last-Translator: \n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"

session_db/pg_session_store.py

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+# Copyright (c) Odoo SA 2017
+# @author Nicolas Seinlet
+# Copyright (c) ACSONE SA 2022
+# @author Stéphane Bidoul
+import json
+import logging
+import os
+
+import psycopg2
+
+import odoo
+from odoo import http
+from odoo.tools._vendor import sessions
+from odoo.tools.func import lazy_property
+
+_logger = logging.getLogger(__name__)
+
+lock = None
+if odoo.evented:
+    import gevent.lock
+
+    lock = gevent.lock.RLock()
+elif odoo.tools.config["workers"] == 0:
+    import threading
+
+    lock = threading.RLock()
+
+
+def with_lock(func):
+    def wrapper(*args, **kwargs):
+        try:
+            if lock is not None:
+                lock.acquire()
+            return func(*args, **kwargs)
+        finally:
+            if lock is not None:
+                lock.release()
+
+    return wrapper
+
+
+def with_cursor(func):
+    def wrapper(self, *args, **kwargs):
+        tries = 0
+        while True:
+            tries += 1
+            try:
+                self._ensure_connection()
+                return func(self, *args, **kwargs)
+            except (psycopg2.InterfaceError, psycopg2.OperationalError):
+                self._close_connection()
+                if tries > 4:
+                    _logger.warning(
+                        "session_db operation try %s/5 failed, aborting", tries
+                    )
+                    raise
+                _logger.info("session_db operation try %s/5 failed, retrying", tries)
+
+    return wrapper
+
+
+class PGSessionStore(sessions.SessionStore):
+    def __init__(self, uri, session_class=None):
+        super().__init__(session_class)
+        self._uri = uri
+        self._cr = None
+        self._open_connection()
+        self._setup_db()
+
+    def __del__(self):
+        self._close_connection()
+
+    @with_lock
+    def _ensure_connection(self):
+        if self._cr is None:
+            self._open_connection()
+
+    @with_lock
+    def _open_connection(self):
+        self._close_connection()
+        cnx = odoo.sql_db.db_connect(self._uri, allow_uri=True)
+        self._cr = cnx.cursor()
+        self._cr._cnx.autocommit = True
+
+    @with_lock
+    def _close_connection(self):
+        """Return cursor to the pool."""
+        if self._cr is not None:
+            try:
+                self._cr.close()
+            except Exception:  # pylint: disable=except-pass
+                pass
+            self._cr = None
+
+    @with_lock
+    @with_cursor
+    def _setup_db(self):
+        self._cr.execute(
+            """
+                CREATE TABLE IF NOT EXISTS http_sessions (
+                    sid varchar PRIMARY KEY,
+                    write_date timestamp without time zone NOT NULL,
+                    payload text NOT NULL
+                )
+            """
+        )
+
+    @with_lock
+    @with_cursor
+    def save(self, session):
+        payload = json.dumps(dict(session))
+        self._cr.execute(
+            """
+                INSERT INTO http_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=payload),
+        )
+
+    @with_lock
+    @with_cursor
+    def delete(self, session):
+        self._cr.execute("DELETE FROM http_sessions WHERE sid=%s", (session.sid,))
+
+    @with_lock
+    @with_cursor
+    def get(self, sid):
+        self._cr.execute("SELECT payload FROM http_sessions WHERE sid=%s", (sid,))
+        try:
+            data = json.loads(self._cr.fetchone()[0])
+        except Exception:
+            return self.new()
+
+        return self.session_class(data, sid, False)
+
+    # This method is not part of the Session interface but is called nevertheless,
+    # so let's get it from FilesystemSessionStore.
+    rotate = http.FilesystemSessionStore.rotate
+
+    @with_lock
+    @with_cursor
+    def vacuum(self, max_lifetime=http.SESSION_LIFETIME):
+        self._cr.execute(
+            "DELETE FROM http_sessions "
+            "WHERE now() at time zone 'UTC' - write_date > %s",
+            (f"{max_lifetime} seconds",),
+        )
+
+
+_original_session_store = http.root.__class__.session_store
+
+
+@lazy_property
+def session_store(self):
+    session_db_uri = os.environ.get("SESSION_DB_URI")
+    if session_db_uri:
+        _logger.debug("HTTP sessions stored in: db")
+        return PGSessionStore(session_db_uri, session_class=http.Session)
+    return _original_session_store.__get__(self, self.__class__)
+
+
+# Monkey patch of standard methods
+_logger.debug("Monkey patching session store")
+http.root.__class__.session_store = session_store
+# Reset the lazy property cache
+vars(http.root).pop("session_store", None)

session_db/pyproject.toml

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+[build-system]
+requires = ["whool"]
+build-backend = "whool.buildapi"

session_db/readme/DESCRIPTION.md

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+Store sessions in a database instead of the filesystem. This simplifies
+the configuration of horizontally scalable deployments, by avoiding the
+need for a distributed filesystem to store the Odoo sessions.

session_db/readme/USAGE.md

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+Set this module in the server wide modules.
+
+Set a `SESSION_DB_URI` environment variable as a full postgresql
+connection string, like `postgres://user:passwd@server/db` or `db`.
+
+It is recommended to use a dedicated database for this module, and
+possibly a dedicated postgres user for additional security.