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a k�h�/ � @ s� d Z ddlZddlZddlmZ ddlmZ ddlmZ ddl m Z ddl m Z ddl mZ G d d � d e�Zd d � Zd d� ZdZdZdZdZdZdZdZdZdZdd� Z da e d� dZ G dd � d ej ej �Z!e!� Z"e"�#� e"�$d � d d � Z%d d!� Z&dS )"z� Banana -- s-exp based protocol. Future Plans: This module is almost entirely stable. The same caveat applies to it as applies to L{twisted.spread.jelly}, however. Read its future plans for more details. @author: Glyph Lefkowitz � N)�BytesIO)�protocol)�styles)�log)� iterbytes)�fullyQualifiedNamec @ s e Zd ZdS )� BananaErrorN)�__name__� __module__� __qualname__� r r ��/root/rpmbuild/BUILDROOT/imh-python39-modules-3.9.7-92.el8.x86_64/opt/imh-python/lib/python3.9/site-packages/twisted/spread/banana.pyr s r c C sH | dkr|d� d S | dks$J d��| rD|t | d@ f�� | d? } q$d S )Nr � z!can only encode positive integers� � )�bytes)�integer�streamr r r �int2b128 s r c C s6 d}d}t | �D ] }t|�}||| 7 }|dK }q|S )z� Convert an integer represented as a base 128 string into an L{int}. @param st: The integer encoded in a byte string. @type st: L{bytes} @return: The integer value extracted from the byte string. @rtype: L{int} � r r )r �ord)�st�e�i�char�nr r r �b1282int) s r � �� �� �� �� �� �� �� �c C s | a dS )ak Set the limit on the prefix length for all Banana connections established after this call. The prefix length limit determines how many bytes of prefix a banana decoder will allow before rejecting a potential object as too large. @type limit: L{int} @param limit: The number of bytes of prefix for banana to allow when decoding. N)� _PREFIX_LIMIT)�limitr r r �setPrefixLimitK s r' �@ i c @ s� e Zd ZdZddgZdZeZdd� Zdd� Z d d � Z d d � Z d d� Z dd� Z dZdd� Zdd� Zddddddd d d d d d!d"d#d$d%d&d'd(d)d*d+d,d-d.d/d0d1d2d3d4d5� Zi Ze�� D ]\ZZeee< q�d<d6d7�Zd8d9� Zd:d;� ZdS )=�Bananaz� L{Banana} implements the I{Banana} s-expression protocol, client and server. @ivar knownDialects: These are the profiles supported by this Banana implementation. @type knownDialects: L{list} of L{bytes} � pb� noneNc C s< || _ d|d d | _d| _d| _d|d d | _dS )zt Set the prefix limit for decoding done by this protocol instance. @see: L{setPrefixLimit} � r r i �i���N)� prefixLimit�_smallestLongInt� _smallestInt� _largestInt�_largestLongInt)�selfr& r r r r' r s zBanana.setPrefixLimitc C s dS )zPSurrogate for connectionMade Called after protocol negotiation. Nr �r2 r r r �connectionReady~ s zBanana.connectionReadyc C s || _ | �� d S �N)�currentDialectr4 )r2 �dialectr r r �_selectDialect� s zBanana._selectDialectc C s� | j r| �|� nr| jrZ|D ]&}|| jv r | �|� | �|� q�q t�d� | j� � n*|| jv rp| �|� nt�d� | j� � d S )NzSThe client doesn't speak any of the protocols offered by the server: disconnecting.zYThe client selected a protocol the server didn't suggest and doesn't know: disconnecting.) r6 �expressionReceived�isClient� knownDialects� sendEncodedr8 r �msg� transportZloseConnection)r2 �objZ serverVerr r r �callExpressionReceived� s$ � �z Banana.callExpressionReceivedc C s& | � t� d | _| js"| �| j� d S r5 )r' r% r6 r: r< r; r3 r r r �connectionMade� s zBanana.connectionMadec C s, | j }|r |d d �|� n | �|� d S )N���r )� listStack�appendr@ )r2 �item�lr r r �gotItem� s zBanana.gotItem� c C s� | j | }| j}| j}|�r�| j |ks@J d�t| j �t|����|| _ d}t|�D ]}|tkrb q�|d }qR|| jkr�td| jf ��d S |d |� }|||d � }||d d � } t |�| jkr�td| jf ��|t k�r t |�}|t kr�td��|� |g f� | }�nz|tk�rdt |�}|t k�r0td��t | �|k�r\| |d � }|| d |� � nd S �n"|tk�r�| }t |�}||� �n |tk�r�| }t |�}||� n�|tk�r�| }t |�}|| � n�|tk�r�| }t |� }||� n�|tk�r0| }t |�}| j| } | jdk�r || � ntd | ����nV|tk�rxt | �d k�rr| d d � }|t�d | d d � �d � nd S ntd |����|rt |d d �|d d kr|�� d } || � �q�qd| _ d S )NzThis ain't right: {} {}r r z1Security precaution: more than %d bytes of prefixz9Security precaution: longer than %d bytes worth of prefixz#Security precaution: List too long.z%Security precaution: String too long.r* z Invalid item for pb protocol � �!dzInvalid Type Byte rB rH )�bufferrC rG �format�reprr � HIGH_BIT_SETr- r �len�LISTr � SIZE_LIMITrD �STRING�INT�LONGINT�LONGNEG�NEG�VOCAB�incomingVocabularyr6 �NotImplementedError�FLOAT�struct�unpack�pop) r2 �chunkrK rC rG �pos�ch�numZtypebyte�restrE r r r � dataReceived� s� � �� �� zBanana.dataReceivedc C s t � �dS )z=Called when an expression (list, string, or int) is received.N)rY )r2 �lstr r r r9 s zBanana.expressionReceivedr r, � � � � r rI � � � � � � � � � � � � � � � � � � � � � � � ) s Nones classs dereferences references dictionarys functions instances lists modules persistents tuples unpersistables copys caches cacheds remotes locals lcaches versions logins passwords challenges logged_ins not_logged_ins cachemessages messages answers errors decrefs decaches uncachec C s$ g | _ t�| j�| _d| _|| _d S )Nr )rC �copy�outgoingVocabulary�outgoingSymbolsZoutgoingSymbolCountr: )r2 r: r r r �__init__4 s zBanana.__init__c C s, t � }| �||j� |�� }| j�|� dS )a Send the encoded representation of the given object: @param obj: An object to encode and send. @raise BananaError: If the given object is not an instance of one of the types supported by Banana. @return: L{None} N)r �_encode�write�getvaluer> )r2 r? � encodeStream�valuer r r r< : s zBanana.sendEncodedc C s� t |ttf�r\t|�tkr,tdt|�f ��tt|�|� |t� |D ]}| �||� qF�n\t |t �r�|| j k sz|| j kr�td|f ��|| j k r�t| |� |t � nN|dk r�t| |� |t� n0|| jkr�t||� |t� nt||� |t� n�t |t��r |t� |t�d|�� n�t |t��r�| jdk�r`|| jv �r`| j| }t||� |t� n>t|�tk�r�tdt|�f ��tt|�|� |t� ||� ntd�t t |��|���d S )Nz#list/tuple is too long to send (%d)z int is too large to send (%d)r rJ r* z$byte string is too long to send (%d)z#Banana cannot send {} objects: {!r}) � isinstance�list�tuplerO rQ r r rP r� �intr. r1 r/ rU rV r0 rS rT �floatrZ r[ �packr r6 r� rW rR rL r �type)r2 r? r� �elemZsymbolIDr r r r� J sR � ��zBanana._encode)r )r r r �__doc__r; r- rQ Z sizeLimitr' r4 r8 r@ rA rG rK rc r9 r� rX �items�k�vr� r< r� r r r r r) a sf S�% r) r+ c C s t � }|t_t�| � |�� S )zEncode a list s-expression.)r �_ir> r< r� )rd r� r r r �encode� s r� c C s: g }|j t_zt�| � W dt_t`n dt_t`0 |d S )z) Decode a banana-encoded string. rH r )rD r� r9 rc rK )r rF r r r �decode� s �r� )'r� r� r[ �ior Ztwisted.internetr Ztwisted.persistedr Ztwisted.pythonr Ztwisted.python.compatr Ztwisted.python.reflectr � Exceptionr r r rP rS rR rV rZ rT rU rW rN r' r% rQ �ProtocolZ Ephemeralr) r� rA r8 r� r� r r r r �<module> s@
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