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� �[�Rc @ s� d Z d d l Z d d l Z d d l Z d d l Z d d l m Z d d l m Z d d l m Z d d l m Z d d l m Z m Z m Z d d l m Z d d l m Z m Z d d l m Z d d l m Z d d l m Z m Z e j d � Z d � Z d d � Z d e f d � � YZ d e f d � � YZ d e! f d � � YZ" d Z# d e" f d � � YZ$ d e! f d � � YZ% d S( s5 werkzeug.contrib.sessions ~~~~~~~~~~~~~~~~~~~~~~~~~ This module contains some helper classes that help one to add session support to a python WSGI application. For full client-side session storage see :mod:`~werkzeug.contrib.securecookie` which implements a secure, client-side session storage. Application Integration ======================= :: from werkzeug.contrib.sessions import SessionMiddleware, \ FilesystemSessionStore app = SessionMiddleware(app, FilesystemSessionStore()) The current session will then appear in the WSGI environment as `werkzeug.session`. However it's recommended to not use the middleware but the stores directly in the application. However for very simple scripts a middleware for sessions could be sufficient. This module does not implement methods or ways to check if a session is expired. That should be done by a cronjob and storage specific. For example to prune unused filesystem sessions one could check the modified time of the files. It sessions are stored in the database the new() method should add an expiration timestamp for the session. For better flexibility it's recommended to not use the middleware but the store and session object directly in the application dispatching:: session_store = FilesystemSessionStore() def application(environ, start_response): request = Request(environ) sid = request.cookies.get('cookie_name') if sid is None: request.session = session_store.new() else: request.session = session_store.get(sid) response = get_the_response_object(request) if request.session.should_save: session_store.save(request.session) response.set_cookie('cookie_name', request.session.sid) return response(environ, start_response) :copyright: (c) 2014 by the Werkzeug Team, see AUTHORS for more details. :license: BSD, see LICENSE for more details. i����N( t path( t time( t random( t sha1( t dumpt loadt HIGHEST_PROTOCOL( t CallbackDict( t dump_cookiet parse_cookie( t ClosingIterator( t rename( t PY2t text_types ^[a-f0-9]{40}$c C s2 t t d � r t j d � St t � � j d � S( Nt urandomi t ascii( t hasattrt osR R R t encode( ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt _urandomJ s c C s[ | d k r$ t | � j d � } n t d j | t t � � j d � t � g � � j � S( NR t ( t Nonet reprR R t joint strR R t hexdigest( t salt( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt generate_keyP s t ModificationTrackingDictc B s) e Z d Z d � Z d � Z d � Z RS( t modifiedc O s< d � } t | _ t j | d | �t j | | | � d S( Nc S s t | _ d S( N( t TrueR ( t self( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt on_update^ s R ( t FalseR R t __init__t dictt update( R t argst kwargsR ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR" ] s c C sd t � } t j | j � } xB | j D]7 } t | | | � } | | k r% t | | | � q% q% W| S( s Create a flat copy of the dict.( t objectt __new__t __class__t __slots__t getattrt setattr( R t missingt resultt namet val( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt copyd s c C s | j � S( N( R1 ( R ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt __copy__n s ( s modified( t __name__t __module__R* R" R1 R2 ( ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR Z s t Sessionc B s? e Z d Z e j d Z e d � Z d � Z e d � � Z RS( s� Subclass of a dict that keeps track of direct object changes. Changes in mutable structures are not tracked, for those you have to set `modified` to `True` by hand. t sidt newc C s& t j | | � | | _ | | _ d S( N( R R" R6 R7 ( R t dataR6 R7 ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR" y s c C s/ d | j j t j | � | j r' d p* d f S( Ns <%s %s%s>t *R ( R) R3 R# t __repr__t should_save( R ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR: ~ s c C s | j S( s� True if the session should be saved. .. versionchanged:: 0.6 By default the session is now only saved if the session is modified, not if it is new like it was before. ( R ( R ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR; � s ( s sids new( R3 R4 t __doc__R R* R! R" R: t propertyR; ( ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR5 r s t SessionStorec B s\ e Z d Z d d � Z d � Z d d � Z d � Z d � Z d � Z d � Z d � Z RS( s> Baseclass for all session stores. The Werkzeug contrib module does not implement any useful stores besides the filesystem store, application developers are encouraged to create their own stores. :param session_class: The session class to use. Defaults to :class:`Session`. c C s" | d k r t } n | | _ d S( N( R R5 t session_class( R R? ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR" � s c C s t j | � d k S( s& Check if a key has the correct format.N( t _sha1_ret matchR ( R t key( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt is_valid_key� s c C s t | � S( s1 Simple function that generates a new session key.( R ( R R ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR � s c C s | j i | j � t � S( s Generate a new session.( R? R R ( R ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR7 � s c C s d S( s Save a session.N( ( R t session( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt save� s c C s | j r | j | � n d S( s( Save if a session class wants an update.N( R; RE ( R RD ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt save_if_modified� s c C s d S( s Delete a session.N( ( R RD ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt delete� s c C s | j i | t � S( s� Get a session for this sid or a new session object. This method has to check if the session key is valid and create a new session if that wasn't the case. ( R? R ( R R6 ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt get� s N( R3 R4 R< R R" RC R R7 RE RF RG RH ( ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR> � s s .__wz_sesst FilesystemSessionStorec B sS e Z d Z d d d e d d � Z d � Z d � Z d � Z d � Z d � Z RS( s� Simple example session store that saves sessions on the filesystem. This store works best on POSIX systems and Windows Vista / Windows Server 2008 and newer. .. versionchanged:: 0.6 `renew_missing` was added. Previously this was considered `True`, now the default changed to `False` and it can be explicitly deactivated. :param path: the path to the folder used for storing the sessions. If not provided the default temporary directory is used. :param filename_template: a string template used to give the session a filename. ``%s`` is replaced with the session id. :param session_class: The session class to use. Defaults to :class:`Session`. :param renew_missing: set to `True` if you want the store to give the user a new sid if the session was not yet saved. s werkzeug_%s.sessi� c C s� t j | | � | d k r+ t j � } n | | _ t | t � rg t rg | j t j � p^ d � } n | j t � s� t d t � � | | _ | | _ | | _ d S( Ns utf-8s& filename templates may not end with %s( R> R" R t tempfilet gettempdirR t isinstanceR R R t syst getfilesystemencodingt endswitht _fs_transaction_suffixt AssertionErrort filename_templatet renew_missingt mode( R R RR R? RS RT ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR" � s c C sM t | t � r3 t r3 | j t j � p* d � } n t j | j | j | � S( Ns utf-8( RL R R R RM RN R R RR ( R R6 ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt get_session_filename� s c C s� | j | j � } t j d t d | j � \ } } t j | d � } z t t | � | t � Wd | j � Xy$ t | | � t j | | j � Wn t t f k r� n Xd S( Nt suffixt dirt wb( RU R6 RJ t mkstempRP R R t fdopenR R# R t closeR t chmodRT t IOErrort OSError( R RD t fnt fdt tmpt f( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyRE � s c C s; | j | j � } y t j | � Wn t k r6 n Xd S( N( RU R6 R t unlinkR^ ( R RD R_ ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyRG � s c C s� | j | � s | j � Sy t | j | � d � } Wn* t k ra | j rX | j � Si } n= Xz. y t | � } Wn t k r� i } n XWd | j � X| j | | t � S( Nt rb( RC R7 t openRU R] RS R t ExceptionR[ R? R! ( R R6 Rb R8 ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyRH s c C s� | j j d d � \ } } t j d t j | � t j | � f � } g } xc t j | j � D]O } | j t � rz q_ n | j | � } | d k r_ | j | j d � � q_ q_ W| S( sH Lists all sessions in the store. .. versionadded:: 0.6 s %si s %s(.{5,})%s$N( RR t splitt ret compilet escapeR t listdirR RO RP RA R t appendt group( R t beforet aftert filename_reR. t filenameRA ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt list s N( R3 R4 R< R R! R" RU RE RG RH Rr ( ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyRI � s t SessionMiddlewarec B s8 e Z d Z d d d d d d e d d � Z d � Z RS( s� A simple middleware that puts the session object of a store provided into the WSGI environ. It automatically sets cookies and restores sessions. However a middleware is not the preferred solution because it won't be as fast as sessions managed by the application itself and will put a key into the WSGI environment only relevant for the application which is against the concept of WSGI. The cookie parameters are the same as for the :func:`~dump_cookie` function just prefixed with ``cookie_``. Additionally `max_age` is called `cookie_age` and not `cookie_max_age` because of backwards compatibility. t session_idt /s werkzeug.sessionc C s^ | | _ | | _ | | _ | | _ | | _ | | _ | | _ | | _ | | _ | | _ d S( N( t appt storet cookie_namet cookie_aget cookie_expirest cookie_patht cookie_domaint cookie_securet cookie_httponlyt environ_key( R Rv Rw Rx Ry Rz R{ R| R} R~ R ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyR" : s c s� t | j d d � � } | j � j d � } | d k rK � j j � � n � j j | � � � | � j <d � � � f d � } t � j | | � � � f d � � S( Nt HTTP_COOKIER c sr � j rb � j j � � | j d t � j � j � j � j � j � j � j � j � f � n � | | | � S( Ns Set-Cookie( R; Rw RE Rl R Rx R6 Ry Rz R{ R| R} R~ ( t statust headerst exc_info( R RD t start_response( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt injecting_start_responseR s c s � j j � � S( N( Rw RF ( ( R RD ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt <lambda>\ s ( R RH Rx R Rw R7 R R Rv ( R t environR� t cookieR6 R� ( ( R RD R� sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt __call__I s N( R3 R4 R< R R! R" R� ( ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyRs * s (& R< Rh R RM RJ R R R t hashlibR t pickleR R R t werkzeug.datastructuresR t werkzeug.utilsR R t werkzeug.wsgiR t werkzeug.posixemulationR t werkzeug._compatR R Ri R@ R R R R R5 R' R> RP RI Rs ( ( ( sH /opt/imh-python/lib/python2.7/site-packages/werkzeug/contrib/sessions.pyt <module>5 s. .i
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