B
    CVvg¼  ã               @   sª   d dl Z d dl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 d dlmZmZ G dd	„ d	ejƒZG d
d„ dejƒZG dd„ dƒZG dd„ deƒZdS )é    N)Úsettings)ÚBaseStorageÚMessage)Úsigning)ÚSimpleCookie)Úconstant_time_compareÚsalted_hmac)ÚSafeDataÚ	mark_safec                   s$   e Zd ZdZdZ‡ fdd„Z‡  ZS )ÚMessageEncoderzI
    Compactly serialize instances of the ``Message`` class as JSON.
    Z__json_messagec                sR   t |tƒrFt |jtƒrdnd}| j||j|jg}|jrB| |j¡ |S tƒ  	|¡S )Né   r   )
Ú
isinstancer   Úmessager	   Úmessage_keyÚlevelZ
extra_tagsÚappendÚsuperÚdefault)ÚselfÚobjZis_safedatar   )Ú	__class__© úJ/tmp/pip-install-o3oxmrkh/Django/django/contrib/messages/storage/cookie.pyr      s    
zMessageEncoder.default)Ú__name__Ú
__module__Ú__qualname__Ú__doc__r   r   Ú__classcell__r   r   )r   r   r      s   r   c                   s(   e Zd ZdZdd„ Z‡ fdd„Z‡  ZS )ÚMessageDecoderzE
    Decode JSON that includes serialized ``Message`` instances.
    c                sz   t |tƒrV|rV|d tjkrD|d r4t|d ƒ|d< t|dd … Ž S ‡ fdd„|D ƒS t |tƒrv‡ fdd„| ¡ D ƒS |S )	Nr   r   é   é   c                s   g | ]}ˆ   |¡‘qS r   )Úprocess_messages)Ú.0Úitem)r   r   r   ú
<listcomp>(   s    z3MessageDecoder.process_messages.<locals>.<listcomp>c                s   i | ]\}}ˆ   |¡|“qS r   )r!   )r"   ÚkeyÚvalue)r   r   r   ú
<dictcomp>*   s   z3MessageDecoder.process_messages.<locals>.<dictcomp>)r   Úlistr   r   r
   r   ÚdictÚitems)r   r   r   )r   r   r!   "   s    

zMessageDecoder.process_messagesc                s   t ƒ j|f|Ž}|  |¡S )N)r   Údecoder!   )r   ÚsÚkwargsÚdecoded)r   r   r   r+   .   s    zMessageDecoder.decode)r   r   r   r   r!   r+   r   r   r   )r   r   r      s   r   c               @   s   e Zd Zdd„ Zdd„ ZdS )ÚMessageSerializerc             C   s   t j|dtd� d¡S )N)ú,ú:)Ú
separatorsÚclszlatin-1)ÚjsonÚdumpsr   Úencode)r   r   r   r   r   r5   4   s
    zMessageSerializer.dumpsc             C   s   t j| d¡td�S )Nzlatin-1)r3   )r4   Úloadsr+   r   )r   Údatar   r   r   r7   ;   s    zMessageSerializer.loadsN)r   r   r   r5   r7   r   r   r   r   r/   3   s   r/   c                   sl   e Zd ZdZdZdZdZdZ‡ fdd„Zdd	„ Z	d
d„ Z
ddd„Zdd„ Zddd„Zdd„ Zdd„ Z‡  ZS )ÚCookieStoragez%
    Store messages in a cookie.
    Úmessagesi   Z__messagesnotfinished__zdjango.contrib.messagesc                s"   t ƒ j||Ž tj| jd�| _d S )N)Zsalt)r   Ú__init__r   Zget_cookie_signerÚkey_saltÚsigner)r   Úargsr-   )r   r   r   r;   K   s    zCookieStorage.__init__c             O   sF   | j j | j¡}|  |¡}|o*|d | jk }|r>|s>| ¡  ||fS )a
  
        Retrieve a list of messages from the messages cookie. If the
        not_finished sentinel value is found at the end of the message list,
        remove it and return a result indicating that not all messages were
        retrieved by this storage.
        éÿÿÿÿ)ÚrequestZCOOKIESÚgetÚcookie_nameÚ_decodeÚnot_finishedÚpop)r   r>   r-   r8   r:   Zall_retrievedr   r   r   Ú_getO   s    
zCookieStorage._getc             C   sH   |r.|j | j|tjtjpdtjp"dtjd� n|j| jtjtjd� dS )zz
        Either set the cookie with the encoded data if there is any data to
        store, or delete the cookie.
        N)ÚdomainÚsecureÚhttponlyÚsamesite)rG   rJ   )Ú
set_cookierB   r   ZSESSION_COOKIE_DOMAINZSESSION_COOKIE_SECUREZSESSION_COOKIE_HTTPONLYZSESSION_COOKIE_SAMESITEZdelete_cookie)r   Úencoded_dataÚresponser   r   r   Ú_update_cookie^   s    zCookieStorage._update_cookieTc       	         sŠ   g }|   |¡}| jrztƒ ‰ ‡ fdd„}xR|rx||ƒ| jkrx|rP| | d¡¡ n| d| ¡ ¡ | j || jg |d�}q(W |  ||¡ |S )aT  
        Store the messages to a cookie and return a list of any messages which
        could not be stored.

        If the encoded data is larger than ``max_cookie_size``, remove
        messages until the data fits (these are the messages which are
        returned), and add the not_finished sentinel value to indicate as much.
        c                s   t ˆ  | ¡d ƒS )Nr   )ÚlenÚvalue_encode)Úval)Úcookier   r   Ústored_length‚   s    z+CookieStorage._store.<locals>.stored_lengthr   )Úencode_empty)Ú_encodeÚmax_cookie_sizer   r   rE   ÚinsertrD   rN   )	r   r:   rM   Zremove_oldestr>   r-   Zunstored_messagesrL   rS   r   )rR   r   Ú_storer   s    	
zCookieStorage._storec             C   s   d}t ||ƒ ¡ S )zê
        # RemovedInDjango40Warning: pre-Django 3.1 hashes will be invalid.
        Create an HMAC/SHA1 hash based on the value and the project setting's
        SECRET_KEY, modified to make it unique for the present purpose.
        zdjango.contrib.messages)r   Ú	hexdigest)r   r&   r<   r   r   r   Ú_legacy_hash�   s    	zCookieStorage._legacy_hashFc             C   s   |s|r| j j|tdd�S dS )a  
        Return an encoded version of the messages list which can be stored as
        plain text.

        Since the data will be retrieved from the client-side, the encoded data
        also contains a hash to ensure that the data was not tampered with.
        T)Ú
serializerÚcompressN)r=   Zsign_objectr/   )r   r:   rT   r   r   r   rU   ›   s    zCookieStorage._encodec          	   C   s”   |sdS y| j j|td�S  tjk
r8   |  |¡}Y n( tjtj	fk
r^   | j  
|¡}Y nX |rŠytj|td�S  tj	k
rˆ   Y nX d| _dS )zÄ
        Safely decode an encoded text stream back into a list of messages.

        If the encoded text stream contained an invalid hash or was in an
        invalid format, return None.
        N)r[   )r3   T)r=   Zunsign_objectr/   r   ZBadSignatureÚ_legacy_decodeÚbinasciiÚErrorr4   ÚJSONDecodeErrorZunsignr7   r   Úused)r   r8   r.   r   r   r   rC   ¦   s    zCookieStorage._decodec             C   s8   |  dd¡}t|ƒdkr4|\}}t||  |¡ƒr4|S d S )Nú$r   r    )ÚsplitrO   r   rZ   )r   r8   ÚbitsZhash_r&   r   r   r   r]   È   s    zCookieStorage._legacy_decode)T)F)r   r   r   r   rB   rV   rD   r<   r;   rF   rN   rX   rZ   rU   rC   r]   r   r   r   )r   r   r9   ?   s   

"r9   )r^   r4   Zdjango.confr   Z$django.contrib.messages.storage.baser   r   Zdjango.corer   Zdjango.httpr   Zdjango.utils.cryptor   r   Zdjango.utils.safestringr	   r
   ÚJSONEncoderr   ÚJSONDecoderr   r/   r9   r   r   r   r   Ú<module>   s   