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a p�h8 � @ s� d Z ddlZddlZddlmZ ddlmZ ddlmZ ddlmZ ddl m Z dd l m Z dd l m Z dd lmZ G d d � d e j�ZG dd� dee�ZG dd� de�ZG dd� de�Ze� ZG dd� de�ZdS )z� flask.sessions ~~~~~~~~~~~~~~ Implements cookie based sessions based on itsdangerous. :copyright: 2010 Pallets :license: BSD-3-Clause � N)�datetime)� BadSignature)�URLSafeTimedSerializer)� CallbackDict� )�collections_abc)�is_ip)� total_seconds)�TaggedJSONSerializerc @ s6 e Zd ZdZedd� �Zejdd� �ZdZdZdZ dS )� SessionMixinz3Expands a basic dictionary with session attributes.c C s | � dd�S )z3This reflects the ``'_permanent'`` key in the dict.� _permanentF)�get��self� r �~/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/flask/sessions.py� permanent s zSessionMixin.permanentc C s t |�| d< d S )Nr )�bool)r �valuer r r r ! s FTN) �__name__� __module__� __qualname__�__doc__�propertyr �setter�new�modified�accessedr r r r r s r c sR e Zd ZdZdZdZd � fdd� Z� fdd�Zd � fdd � Zd� fd d � Z � Z S )�SecureCookieSessiona Base class for sessions based on signed cookies. This session backend will set the :attr:`modified` and :attr:`accessed` attributes. It cannot reliably track whether a session is new (vs. empty), so :attr:`new` remains hard coded to ``False``. FNc s dd� }t t| ��||� d S )Nc S s d| _ d| _d S �NT)r r r r r r � on_updateL s z/SecureCookieSession.__init__.<locals>.on_update)�superr �__init__)r �initialr �� __class__r r r" K s z SecureCookieSession.__init__c s d| _ tt| ��|�S r )r r! r � __getitem__)r �keyr$ r r r& R s z SecureCookieSession.__getitem__c s d| _ tt| ��||�S r )r r! r r �r r' �defaultr$ r r r V s zSecureCookieSession.getc s d| _ tt| ��||�S r )r r! r � setdefaultr( r$ r r r* Z s z SecureCookieSession.setdefault)N)N)N) r r r r r r r" r& r r* � __classcell__r r r$ r r 5 s r c @ s6 e Zd ZdZdd� Ze Z Z Z Z Z Z Z [dS )� NullSessionz�Class used to generate nicer error messages if sessions are not available. Will still allow read-only access to the empty session but fail on setting. c O s t d��d S )Nz�The session is unavailable because no secret key was set. Set the secret_key on the application to something unique and secret.)� RuntimeError)r �args�kwargsr r r �_faile s �zNullSession._failN) r r r r r0 � __setitem__� __delitem__�clear�pop�popitem�updater* r r r r r, _ s r, c @ sp e Zd ZdZeZdZdd� Zdd� Zdd� Z d d � Z d d � Z d d� Z dd� Z dd� Zdd� Zdd� Zdd� ZdS )�SessionInterfacea� The basic interface you have to implement in order to replace the default session interface which uses werkzeug's securecookie implementation. The only methods you have to implement are :meth:`open_session` and :meth:`save_session`, the others have useful defaults which you don't need to change. The session object returned by the :meth:`open_session` method has to provide a dictionary like interface plus the properties and methods from the :class:`SessionMixin`. We recommend just subclassing a dict and adding that mixin:: class Session(dict, SessionMixin): pass If :meth:`open_session` returns ``None`` Flask will call into :meth:`make_null_session` to create a session that acts as replacement if the session support cannot work because some requirement is not fulfilled. The default :class:`NullSession` class that is created will complain that the secret key was not set. To replace the session interface on an application all you have to do is to assign :attr:`flask.Flask.session_interface`:: app = Flask(__name__) app.session_interface = MySessionInterface() .. versionadded:: 0.8 Fc C s | � � S )a� Creates a null session which acts as a replacement object if the real session support could not be loaded due to a configuration error. This mainly aids the user experience because the job of the null session is to still support lookup without complaining but modifications are answered with a helpful error message of what failed. This creates an instance of :attr:`null_session_class` by default. )�null_session_class�r �appr r r �make_null_session� s z"SessionInterface.make_null_sessionc C s t || j�S )z�Checks if a given object is a null session. Null sessions are not asked to be saved. This checks if the object is an instance of :attr:`null_session_class` by default. )� isinstancer8 )r �objr r r �is_null_session� s z SessionInterface.is_null_sessionc C s� |j d }|dur |r|S dS |j d }|s:d|j d< dS |�dd�d �d�}d|vrxt�d j|d �� d|j d< dS t|�}|r�t�d � | �|�d kr�|s�d| }||j d< |S ) aM Returns the domain that should be set for the session cookie. Uses ``SESSION_COOKIE_DOMAIN`` if it is configured, otherwise falls back to detecting the domain based on ``SERVER_NAME``. Once detected (or if not set at all), ``SESSION_COOKIE_DOMAIN`` is updated to avoid re-running the logic. ZSESSION_COOKIE_DOMAINNZ SERVER_NAMEF�:r r �.z�"{rv}" is not a valid cookie domain, it must contain a ".". Add an entry to your hosts file, for example "{rv}.localdomain", and use that instead.)�rvz�The session cookie domain is an IP address. This may not work as intended in some browsers. Add an entry to your hosts file, for example "localhost.localdomain", and use that instead.�/)�config�rsplit�lstrip�warnings�warn�formatr �get_cookie_path)r r: rA �ipr r r �get_cookie_domain� s2 �� � z"SessionInterface.get_cookie_domainc C s |j d p|j d S )a Returns the path for which the cookie should be valid. The default implementation uses the value from the ``SESSION_COOKIE_PATH`` config var if it's set, and falls back to ``APPLICATION_ROOT`` or uses ``/`` if it's ``None``. ZSESSION_COOKIE_PATHZAPPLICATION_ROOT�rC r9 r r r rI � s z SessionInterface.get_cookie_pathc C s |j d S )z�Returns True if the session cookie should be httponly. This currently just returns the value of the ``SESSION_COOKIE_HTTPONLY`` config var. ZSESSION_COOKIE_HTTPONLYrL r9 r r r �get_cookie_httponly� s z$SessionInterface.get_cookie_httponlyc C s |j d S )z�Returns True if the cookie should be secure. This currently just returns the value of the ``SESSION_COOKIE_SECURE`` setting. ZSESSION_COOKIE_SECURErL r9 r r r �get_cookie_secure� s z"SessionInterface.get_cookie_securec C s |j d S )z�Return ``'Strict'`` or ``'Lax'`` if the cookie should use the ``SameSite`` attribute. This currently just returns the value of the :data:`SESSION_COOKIE_SAMESITE` setting. ZSESSION_COOKIE_SAMESITErL r9 r r r �get_cookie_samesite� s z$SessionInterface.get_cookie_samesitec C s |j rt�� |j S dS )a A helper method that returns an expiration date for the session or ``None`` if the session is linked to the browser session. The default implementation returns now + the permanent session lifetime configured on the application. N)r r �utcnow�permanent_session_lifetime�r r: �sessionr r r �get_expiration_time s z$SessionInterface.get_expiration_timec C s |j p|jo|jd S )a� Used by session backends to determine if a ``Set-Cookie`` header should be set for this session cookie for this response. If the session has been modified, the cookie is set. If the session is permanent and the ``SESSION_REFRESH_EACH_REQUEST`` config is true, the cookie is always set. This check is usually skipped if the session was deleted. .. versionadded:: 0.11 Z SESSION_REFRESH_EACH_REQUEST)r r rC rR r r r �should_set_cookie s �z"SessionInterface.should_set_cookiec C s t � �dS )a% This method has to be implemented and must either return ``None`` in case the loading failed because of a configuration error or an instance of a session object which implements a dictionary like interface + the methods and attributes on :class:`SessionMixin`. N��NotImplementedError)r r: �requestr r r � open_session s z SessionInterface.open_sessionc C s t � �dS )z�This is called for actual sessions returned by :meth:`open_session` at the end of the request. This is still called during a request context so if you absolutely need access to the request you can do that. NrV )r r: rS �responser r r � save_session' s z SessionInterface.save_sessionN)r r r r r, r8 Z pickle_basedr; r> rK rI rM rN rO rT rU rY r[ r r r r r7 p s ! : r7 c @ sB e Zd ZdZdZeej�ZdZ e Z e Z dd� Zdd� Zdd � Zd S ) � SecureCookieSessionInterfacezuThe default session interface that stores sessions in signed cookies through the :mod:`itsdangerous` module. zcookie-session�hmacc C s0 |j s d S t| j| jd�}t|j | j| j|d�S )N)�key_derivation� digest_method)�salt� serializer� signer_kwargs)Z secret_key�dictr^ r_ r r` ra )r r: rb r r r �get_signing_serializerF s ��z3SecureCookieSessionInterface.get_signing_serializerc C st | � |�}|d u rd S |j�|j�}|s0| �� S t|j�}z|j||d�}| �|�W S tyn | �� Y S 0 d S )N)�max_age) rd �cookiesr �session_cookie_name� session_classr rQ �loadsr )r r: rX �s�valre �datar r r rY S s z)SecureCookieSessionInterface.open_sessionc C s� | � |�}| �|�}|s4|jr0|j|j||d� d S |jrF|j�d� | �||�sVd S | � |�}| � |�}| � |�}| � ||�} | � |��t|��} |j|j| | |||||d� d S )N)�domain�path�Cookie)�expires�httponlyrm rn �secure�samesite)rK rI r Z delete_cookierg r �vary�addrU rM rN rO rT rd �dumpsrc � set_cookie) r r: rS rZ rm rn rq rr rs rp rk r r r r[ a s6 � �z)SecureCookieSessionInterface.save_sessionN)r r r r r` � staticmethod�hashlib�sha1r_ r^ �session_json_serializerra r rh rd rY r[ r r r r r\ 3 s r\ )r ry rF r Z itsdangerousr r Zwerkzeug.datastructuresr �_compatr Zhelpersr r Zjson.tagr �MutableMappingr r r, �objectr7 r{ r\ r r r r �<module> s" * A
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