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jinja2.sandbox
~~~~~~~~~~~~~~
Adds a sandbox layer to Jinja as it was the default behavior in the old
Jinja 1 releases. This sandbox is slightly different from Jinja 1 as the
default behavior is easier to use.
The behavior can be changed by subclassing the environment.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD.
iN( t Environment( t
SecurityError( t string_typest
function_typet method_typet traceback_typet code_typet
frame_typet generator_typet text_typet PY2( t Markup( t update_wrappert format( t Formatteri t func_closuret func_codet func_dictt
func_defaultst func_globalst im_classt im_funct im_selft gi_framet gi_codet cr_framet cr_codet ag_codet ag_framet ignores the sets modulet modules jinja2.sandbox( t deque( t UserDictt DictMixin( t UserList( t Set( t
MutableSett MutableMappingt MutableSequencet addt cleart difference_updatet discardt popt removet symmetric_difference_updatet updatet popitemt
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appendleftt
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| | _ d S( N( t escape( t selfR; ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt __init__t s c C s t | d r! | j | } n` t | d rf | rW t d j | t | n | j } n t j | | t | } t | j | S( Nt __html_format__t __html__s Format specifier {0} given, but {1} does not define __html_format__. A class that defines __html__ must define __html_format__ to work with format specifiers.(
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__module__R= RC ( ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR: s s c G s5 t | } t | t k r1 t d t n | S( sW A range that can't generate ranges with a length of more than
MAX_RANGE items.
s+ range too big, maximum size for range is %d( t ranget lent MAX_RANGEt
OverflowError( t argst rng( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt
safe_range s
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t | _ | S( sn Marks a function or method as unsafe.
::
@unsafe
def delete(self):
pass
( t Truet unsafe_callable( t f( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt unsafe s c C s% t | t r" | t k rt Sn t | t rP | t k sI | t k rt Sn t | t rr | d k rt Sn t | t t t f r t St | t
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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(lambda: None, "func_code")
True
>>> is_internal_attribute((lambda x:x).func_code, 'co_code')
True
>>> is_internal_attribute(str, "upper")
False
t mrot
CoroutineTypet AsyncGeneratorTypet __( t
isinstanceR t UNSAFE_FUNCTION_ATTRIBUTESRP R t UNSAFE_METHOD_ATTRIBUTESRB R R R R t UNSAFE_GENERATOR_ATTRIBUTESR@ t typesRU t UNSAFE_COROUTINE_ATTRIBUTESRV t attrit! UNSAFE_ASYNC_GENERATOR_ATTRIBUTESt
startswith( t objt attr( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt is_internal_attribute s, ! ! c C s4 x- t D]% \ } } t | | r | | k Sq Wt S( s 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
( t
_mutable_specRX t False( Ra Rb t typespecRS ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt modifies_known_mutable s t SandboxedEnvironmentc B s e Z d Z e Z i e j d 6e j d 6e j d 6e j d 6e j
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Z d Z d Z d
Z d Z d Z d Z d Z d Z RS( s 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 +t -t *t /s //s **t %c C s t S( s 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 excuted 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
( Re ( R< t operator( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt intercept_unop& s c O sH t j | | | t | j d <| j j | _ | j j | _ d S( NRI ( R R= RO t globalst default_binop_tablet copyt binop_tablet default_unop_tablet
unop_table( R< RM t kwargs( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR= 8 s
c C s | j d p t | | S( sY 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.
t _( R` Rc ( R< Ra Rb RD ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt is_safe_attribute> s c C s# t | d t p! t | d t S( s 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.
RQ t alters_data( t getattrRe ( R< Ra ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt is_safe_callableG s c C s | j | | | S( s 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
( Rs ( R< t contextRn t leftt right( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt
call_binopP s c C s | j | | S( s 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
( Ru ( R< R| Rn t arg( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt call_unopY s c C s y | | SWn t t f k
r t | t r y t | } Wn t k
rT q Xy t | | } Wn t k
r{ q X| j | } | d k r | S| j
| | | r | S| j | | Sq n X| j d | d | S( s( Subscribe an object from sandboxed code.Ra t nameN(
t TypeErrort LookupErrorRX R t strt ExceptionRz t AttributeErrort wrap_str_formatt NoneRx t unsafe_undefinedt undefined( R< Ra t argumentRb RD t fmt( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt getitemb s&
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rH q XnI X| j | } | d k rl | S| j | | | r | S| j | | S| j d | d | S( s Subscribe an object from sandboxed code and prefer the
attribute. The attribute passed *must* be a bytestring.
Ra R N( Rz R R R R R Rx R R ( R< Ra t attributeRD R ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyRz z s
c C s/ | j d | | j j f d | d | d t S( s1 Return an undefined object for unsafe attributes.s. access to attribute %r of %r object is unsafe.R Ra t exc( R t __class__RG R ( R< Ra R ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR s c s t | t j t j f s+ | j d k r/ d S| j t t sK d St d } t t r t
| j } n t | } | j
f d } t | | S( s( If the given value is a ``str.format`` method, return a new function
that handles sandboxing. This is done at access rather than in
:meth:`call`, so that calls made without ``call`` are also sandboxed.
Note: Python 2 only supports str.format, not str.format_map.
R
c s | | S( N( ( RM Rv ( t f_selft str_typet vformat( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt wrapper s N( RX R\ t
MethodTypet BuiltinMethodTypeRG R t __self__R RB R t SandboxedEscapeFormatterR; t SandboxedFormatterR R ( R< RD t formatterR ( ( R R R s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR s c O s8 | j | s% t d | f n | j | | | S( s# Call an object from sandboxed code.s %r is not safely callable( R{ R t call( t _SandboxedEnvironment__selft _SandboxedEnvironment__contextt _SandboxedEnvironment__objRM Rv ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR s ( RG RH t __doc__RP t sandboxedRn R' t subt mult truedivt floordivt powt modRq t post negRt t frozensett intercepted_binopst intercepted_unopsRo R= Rx R{ R R R Rz R R R ( ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyRh s4
t ImmutableSandboxedEnvironmentc B s e Z d Z d Z RS( s 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 j | | | | s t St | | S( N( Rh Rx Re Rg ( R< Ra Rb RD ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyRx s ( RG RH R Rx ( ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR s ( t formatter_field_name_splitc C s
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field_name( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR s t SandboxedFormatterMixinc B s e Z d Z d Z RS( c C s
| | _ d S( N( t _env( R< t env( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR= s c C s{ t | \ } } | j | | | } xG | D]? \ } } | rX | j j | | } q. | j j | | } q. W| | f S( N( R t get_valueR Rz R ( R< R RM Rv t firstt restRa t is_attrt i( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt get_field s ( RG RH R= R ( ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR s R c B s e Z d Z RS( c C s! t j | | t j | d S( N( R R= R ( R< R ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR= s ( RG RH R= ( ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR s R c B s e Z d Z RS( c C s$ t j | | t j | | d S( N( R R= R: ( R< R R; ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR= s ( RG RH R= ( ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyR s (D R R\ Rn t jinja2.environmentR t jinja2.exceptionsR t jinja2._compatR R R R R R R R R
t jinja2.utilsR t functoolsR Re t
has_formatR@ t stringR RP RK t setRY RZ R[ R] R_ t warningst filterwarningst DeprecationWarningt collectionsR t _mutable_set_typest dictt _mutable_mapping_typest listt _mutable_sequence_typesR R! R" t ImportErrort setsR# R$ R% R& R Rd R: RO RS Rc Rg Rh R t _stringR t objectR R R ( ( ( s2 /usr/lib/python2.7/site-packages/jinja2/sandbox.pyt s @
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