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편집 파일: sandbox.cpython-39.pyc
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See https://bugs.python.org/issue13598 for information about why this is necessary. c C s || _ || _d| _d S )Nr )�_args�_kwargs� _last_index��self�args�kwargs� r5 �2/usr/lib/python3.9/site-packages/jinja2/sandbox.py�__init__� s z _MagicFormatMapping.__init__c C sN |dkrD| j }| j d7 _ z | j| W S ty: Y n0 t|�}| j| S )N� r )r0 r. � LookupError�strr/ )r2 �key�idxr5 r5 r6 � __getitem__� s z _MagicFormatMapping.__getitem__c C s t | j�S �N)�iterr/ �r2 r5 r5 r6 �__iter__� s z _MagicFormatMapping.__iter__c C s t | j�S r> )�lenr/ r@ r5 r5 r6 �__len__� s z_MagicFormatMapping.__len__N)�__name__� __module__� __qualname__�__doc__r7 r= rA rC r5 r5 r5 r6 r- ~ s r- c G s$ t | � }t|�tkr tdt ��|S )zWA range that can't generate ranges with a length of more than MAX_RANGE items. zDRange too big. The sandbox blocks ranges larger than MAX_RANGE (%d).)r rB � MAX_RANGE� OverflowError)r3 �rngr5 r5 r6 � safe_range� s ��rK c C s d| _ | S )znMarks a function or method as unsafe. :: @unsafe def delete(self): pass T)�unsafe_callable)�fr5 r5 r6 �unsafe� s rN c C s� t | tj�r|tv r�dS n�t | tj�r<|tv s6|tv r�dS n�t | t�rT|dkr�dS nzt | tjtjtj f�rndS t | tj �r�|t v r�dS nFt td�r�t | tj �r�|tv r�dS n"t td�r�t | tj�r�|tv r�dS |�d�S )a� Test if the attribute given is an internal python attribute. For example this function returns `True` for the `func_code` attribute of python objects. This is useful if the environment method :meth:`~SandboxedEnvironment.is_safe_attribute` is overridden. >>> from jinja2.sandbox import is_internal_attribute >>> is_internal_attribute(str, "mro") True >>> is_internal_attribute(str, "upper") False T�mro� CoroutineType�AsyncGeneratorType�__)� isinstance�types� FunctionType�UNSAFE_FUNCTION_ATTRIBUTES� MethodType�UNSAFE_METHOD_ATTRIBUTES�type�CodeType� TracebackType� FrameType� GeneratorType�UNSAFE_GENERATOR_ATTRIBUTES�hasattrrP �UNSAFE_COROUTINE_ATTRIBUTESrQ �!UNSAFE_ASYNC_GENERATOR_ATTRIBUTES� startswith)�obj�attrr5 r5 r6 �is_internal_attribute� s. �re c C s( t D ] \}}t| |�r||v S qdS )a� This function checks if an attribute on a builtin mutable object (list, dict, set or deque) would modify it if called. It also supports the "user"-versions of the objects (`sets.Set`, `UserDict.*` etc.) and with Python 2.6 onwards the abstract base classes `MutableSet`, `MutableMapping`, and `MutableSequence`. >>> modifies_known_mutable({}, "clear") True >>> modifies_known_mutable({}, "keys") False >>> modifies_known_mutable([], "append") True >>> modifies_known_mutable([], "index") False If called with an unsupported object (such as unicode) `False` is returned. >>> modifies_known_mutable("foo", "upper") False F)� _mutable_specrS )rc rd ZtypespecrN r5 r5 r6 �modifies_known_mutable� s rg c @ s� e Zd ZdZdZejejejej ej ej ej d�Z ejejd�Ze� Ze� Zdd� Zdd� Zd d � Zd d � Zd d� Zdd� Zdd� Zdd� Zdd� Z dd� Z dd� Z dS ) �SandboxedEnvironmenta� The sandboxed environment. It works like the regular environment but tells the compiler to generate sandboxed code. Additionally subclasses of this environment may override the methods that tell the runtime what attributes or functions are safe to access. If the template tries to access insecure code a :exc:`SecurityError` is raised. However also other exceptions may occur during the rendering so the caller has to ensure that all exceptions are caught. T)�+�-�*�/z//z**�%)ri rj c C s dS )a� Called during template compilation with the name of a unary operator to check if it should be intercepted at runtime. If this method returns `True`, :meth:`call_unop` is executed for this unary operator. The default implementation of :meth:`call_unop` will use the :attr:`unop_table` dictionary to perform the operator with the same logic as the builtin one. The following unary operators are interceptable: ``+`` and ``-`` Intercepted calls are always slower than the native operator call, so make sure only to intercept the ones you are interested in. .. versionadded:: 2.6 Fr5 )r2 �operatorr5 r5 r6 �intercept_unop8 s z#SandboxedEnvironment.intercept_unopc O s> t j| g|�R i |�� t| jd< | j�� | _| j�� | _d S )N�range) r r7 rK �globals�default_binop_table�copy� binop_table�default_unop_table� unop_tabler1 r5 r5 r6 r7 I s z SandboxedEnvironment.__init__c C s |� d�pt||� S )aY The sandboxed environment will call this method to check if the attribute of an object is safe to access. Per default all attributes starting with an underscore are considered private as well as the special attributes of internal python objects as returned by the :func:`is_internal_attribute` function. �_)rb re �r2 rc rd �valuer5 r5 r6 �is_safe_attributeO s z&SandboxedEnvironment.is_safe_attributec C s t |dd�pt |dd� S )a Check if an object is safely callable. Per default a function is considered safe unless the `unsafe_callable` attribute exists and is True. Override this method to alter the behavior, but this won't affect the `unsafe` decorator from this module. rL FZ alters_data)�getattr)r2 rc r5 r5 r6 �is_safe_callableX s �z%SandboxedEnvironment.is_safe_callablec C s | j | ||�S )z�For intercepted binary operator calls (:meth:`intercepted_binops`) this function is executed instead of the builtin operator. This can be used to fine tune the behavior of certain operators. .. versionadded:: 2.6 )rt )r2 �contextrn �left�rightr5 r5 r6 � call_binopb s z SandboxedEnvironment.call_binopc C s | j | |�S )z�For intercepted unary operator calls (:meth:`intercepted_unops`) this function is executed instead of the builtin operator. This can be used to fine tune the behavior of certain operators. .. versionadded:: 2.6 )rv )r2 r} rn �argr5 r5 r6 � call_unopk s z SandboxedEnvironment.call_unopc C s� z || W S t tfy� t|t�r�z t|�}W n tyD Y nd0 zt||�}W n tyf Y nB0 | �|�}|dur�| Y S | � |||�r�| Y S | � ||� Y S Y n0 | j ||d�S )z(Subscribe an object from sandboxed code.N�rc �name) � TypeErrorr9 rS r r: � Exceptionr{ �AttributeError�wrap_str_formatrz �unsafe_undefined� undefined)r2 rc �argumentrd ry �fmtr5 r5 r6 �getitemt s& z SandboxedEnvironment.getitemc C s� zt ||�}W n8 tyF z|| W Y S ttfy@ Y n0 Y n60 | �|�}|dur^|S | �|||�rp|S | �||�S | j||d�S )z�Subscribe an object from sandboxed code and prefer the attribute. The attribute passed *must* be a bytestring. Nr� )r{ r� r� r9 r� rz r� r� )r2 rc � attributery r� r5 r5 r6 r{ � s z SandboxedEnvironment.getattrc C s | j d||jjf ||td�S )z1Return an undefined object for unsafe attributes.z.access to attribute %r of %r object is unsafe.)r� rc �exc)r� � __class__rD r )r2 rc r� r5 r5 r6 r� � s ��z%SandboxedEnvironment.unsafe_undefinedc s� t |tjtjf�r |jdvr dS |j� t � t�s4dS t� ��|jdk�t � t�r`t | � j d�}nt | �}|j �� ���fdd�}t ||�S )a If the given value is a ``str.format`` or ``str.format_map`` method, return a new function than handles sandboxing. This is done at access rather than in :meth:`call`, so that calls made without ``call`` are also sandboxed. )�format� format_mapNr� )�escapec sL �r<|rt d��t| �dkr0t dt| �� d���| d }d} ��� | |��S )Nz'format_map() takes no keyword argumentsr z)format_map() takes exactly one argument (z given)r r5 )r� rB )r3 r4 �Zf_selfZ is_format_mapZstr_type�vformatr5 r6 �wrapper� s �z5SandboxedEnvironment.wrap_str_format.<locals>.wrapper)rS rT rW �BuiltinMethodTyperD �__self__r: rY r �SandboxedEscapeFormatterr� �SandboxedFormatterr� r )r2 ry � formatterr� r5 r� r6 r� � s" �� z$SandboxedEnvironment.wrap_str_formatc O s0 | � |�std|f ��|j|g|�R i |��S )z#Call an object from sandboxed code.z%r is not safely callable)r| r �call)Z_SandboxedEnvironment__selfZ _SandboxedEnvironment__contextZ_SandboxedEnvironment__objr3 r4 r5 r5 r6 r� � s zSandboxedEnvironment.callN) rD rE rF rG Z sandboxedrn r �sub�mul�truediv�floordiv�pow�modrr �pos�negru � frozensetZintercepted_binopsZintercepted_unopsro r7 rz r| r� r� r� r{ r� r� r� r5 r5 r5 r6 rh � s0 � $rh c @ s e Zd ZdZdd� ZdS )� ImmutableSandboxedEnvironmentz�Works exactly like the regular `SandboxedEnvironment` but does not permit modifications on the builtin mutable objects `list`, `set`, and `dict` by using the :func:`modifies_known_mutable` function. c C s t �| |||�sdS t||� S )NF)rh rz rg rx r5 r5 r6 rz � s z/ImmutableSandboxedEnvironment.is_safe_attributeN)rD rE rF rG rz r5 r5 r5 r6 r� � s r� )�formatter_field_name_splitc C s | � � S r> )Z_formatter_field_name_split)� field_namer5 r5 r6 r� � s r� c @ s e Zd Zdd� Zdd� ZdS )�SandboxedFormatterMixinc C s || _ d S r> )�_env�r2 �envr5 r5 r6 r7 � s z SandboxedFormatterMixin.__init__c C sR t |�\}}| �|||�}|D ]*\}}|r:| j�||�}q | j�||�}q ||fS r> )r� Z get_valuer� r{ r� ) r2 r� r3 r4 �first�restrc Zis_attr�ir5 r5 r6 � get_field� s z!SandboxedFormatterMixin.get_fieldN)rD rE rF r7 r� r5 r5 r5 r6 r� � s r� c @ s e Zd Zdd� ZdS )r� c C s t �| |� t�| � d S r> )r� r7 r r� r5 r5 r6 r7 � s zSandboxedFormatter.__init__N�rD rE rF r7 r5 r5 r5 r6 r� � s r� c @ s e Zd Zdd� ZdS )r� c C s t �| |� t�| |� d S r> )r� r7 r )r2 r� r� r5 r5 r6 r7 s z!SandboxedEscapeFormatter.__init__Nr� r5 r5 r5 r6 r� s r� )>rG rn rT �warnings� collectionsr � functoolsr �stringr Z markupsafer r Z_compatr r r r Z environmentr � exceptionsr rH rV �setrX r^ r` ra �filterwarnings�DeprecationWarningrD Z_mutable_set_types�dictZ_mutable_mapping_types�listZ_mutable_sequence_typesr r r � ImportErrorZsetsr � MutableSet�MutableMapping�MutableSequencer� rf �Mappingr- rK rN re rg rh r� Z_stringr� �objectr� r� r� r5 r5 r5 r6 �<module> s� � �� � ����+ % _