/usr/lib/python3/dist-packages/twisted/spread/__pycache__
Edit: /usr/lib/python3/dist-packages/twisted/spread/__pycache__/jelly.cpython-310.pyc (32110B)
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S-expression-based persistence of python objects.
It does something very much like L{Pickle}; however, pickle's main goal
seems to be efficiency (both in space and time); jelly's main goals are
security, human readability, and portability to other environments.
This is how Jelly converts various objects to s-expressions.
Boolean::
True --> ['boolean', 'true']
Integer::
1 --> 1
List::
[1, 2] --> ['list', 1, 2]
String::
"hello" --> "hello"
Float::
2.3 --> 2.3
Dictionary::
{'a': 1, 'b': 'c'} --> ['dictionary', ['b', 'c'], ['a', 1]]
Module::
UserString --> ['module', 'UserString']
Class::
UserString.UserString --> ['class', ['module', 'UserString'], 'UserString']
Function::
string.join --> ['function', 'join', ['module', 'string']]
Instance: s is an instance of UserString.UserString, with a __dict__
{'data': 'hello'}::
["UserString.UserString", ['dictionary', ['data', 'hello']]]
Class Method: UserString.UserString.center::
['method', 'center', ['None'], ['class', ['module', 'UserString'],
'UserString']]
Instance Method: s.center, where s is an instance of UserString.UserString::
['method', 'center', ['instance', ['reference', 1, ['class',
['module', 'UserString'], 'UserString']], ['dictionary', ['data', 'd']]],
['dereference', 1]]
The Python 2.x C{sets.Set} and C{sets.ImmutableSet} classes are
serialized to the same thing as the builtin C{set} and C{frozenset}
classes. (This is only relevant if you are communicating with a
version of jelly running on an older version of Python.)
@author: Glyph Lefkowitz
N)reduce) implementer)Version)NotKnown
_Container _Dereference_DictKeyAndValue_InstanceMethod_Tuple) nativeString)deprecatedModuleAttribute)namedAny namedObjectqual)
IJellyable IUnjellyable None class module functions dereferences
persistents references
dictionarys list sets tuples instance frozensetTwisted z'instance_atom is unused within Twisted.ztwisted.spread.jelly
instance_atoms
unpersistablec C s t | tr
| | S dS )a
Given an object, if that object is a type, return a new, blank instance
of that type which has not had C{__init__} called on it. If the object
is not a type, return L{None}.
@param cls: The type (or class) to create an instance of.
@type cls: L{type} or something else that cannot be
instantiated.
@return: a new blank instance or L{None} if C{cls} is not a class or type.
N)
isinstancetype__new__)cls r 6/usr/lib/python3/dist-packages/twisted/spread/jelly.py _createBlank s
r! c s, t | fdd}t d|}|| S )z
Make a new instance of a class without calling its __init__ method.
@param state: A C{dict} used to update C{inst.__dict__} either directly or
via C{__setstate__}, if available.
@return: A new instance of C{cls}.
c s
| _ d S N__dict__)stateinstancer r
defaultSetter
z#_newInstance..defaultSetter __setstate__)r! getattr)r r% r( setterr r& r _newInstance s
r- c C s. t | t}|r t| } t | ts| d} | S )Nutf-8)r r r bytesencode)
classnamepisObjectr r r _maybeClass s
r3 c C t | } |t| < t| dS )at
Set which local class will represent a remote type.
If you have written a Copyable class that you expect your client to be
receiving, write a local "copy" class to represent it, then call::
jellier.setUnjellyableForClass('module.package.Class', MyCopier).
Call this at the module level immediately after its class
definition. MyCopier should be a subclass of RemoteCopy.
The classname may be a special tag returned by
'Copyable.getTypeToCopyFor' rather than an actual classname.
This call is also for cached classes, since there will be no
overlap. The rules are the same.
N)r3 unjellyableRegistryglobalSecurity
allowTypes) classname unjellyabler r r setUnjellyableForClass s r: c C r4 )a
Set the factory to construct a remote instance of a type::
jellier.setUnjellyableFactoryForClass('module.package.Class', MyFactory)
Call this at the module level immediately after its class definition.
C{copyFactory} should return an instance or subclass of
L{RemoteCopy}.
Similar to L{setUnjellyableForClass} except it uses a factory instead
of creating an instance.
N)r3 unjellyableFactoryRegistryr6 r7 )r8 copyFactoryr r r setUnjellyableFactoryForClass s r= c C sn |du r| j }|r
d| }t| D ]#}t| |}zt||}W n ty( Y qw |r4t| | | qdS )a
Set all classes in a module derived from C{baseClass} as copiers for
a corresponding remote class.
When you have a hierarchy of Copyable (or Cacheable) classes on one
side, and a mirror structure of Copied (or RemoteCache) classes on the
other, use this to setUnjellyableForClass all your Copieds for the
Copyables.
Each copyTag (the "classname" argument to getTypeToCopyFor, and
what the Copyable's getTypeToCopyFor returns) is formed from
adding a prefix to the Copied's class name. The prefix defaults
to module.__name__. If you wish the copy tag to consist of solely
the classname, pass the empty string ''.
@param module: a module object from which to pull the Copied classes.
(passing sys.modules[__name__] might be useful)
@param baseClass: the base class from which all your Copied classes derive.
@param prefix: the string prefixed to classnames to form the
unjellyableRegistry.
Nz%s.)__name__dirr+
issubclass TypeErrorr: )module baseClassprefixnameloadedyesr r r setUnjellyableForClassTree s
rH c C sP t | dr
| }n| j}|| }|t| jd||g | | |S )zM
Utility method to default to 'normal' state rules in serialization.
__getstate__r. )
hasattrrI r$ prepareextendr __class__r0 jellypreserve)instjellierr% sxpr r r getInstanceState s
rS c C s0 | |d }t| dr| | | S || _| S )zO
Utility method to default to 'normal' state rules in unserialization.
r* )unjellyrJ r* r$ )rP unjellier jellyListr% r r r setInstanceState s
rX c @ s& e Zd ZdZdd ZdefddZdS )
Unpersistablezd
This is an instance of a class that comes back when something couldn't be
unpersisted.
c C s
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Initialize an unpersistable object with a descriptive C{reason} string.
N)reason)selfrZ r r r __init__% s
zUnpersistable.__init__returnc C s dt | j S )NzUnpersistable(%s))reprrZ r[ r r r __repr__+ zUnpersistable.__repr__N)r>
__module__ __qualname____doc__r\ strr` r r r r rY s rY c @ e Zd ZdZdd Zdd ZdS ) Jellyablezc
Inherit from me to Jelly yourself directly with the `getStateFor'
convenience method.
c C s | j S r" r# )r[ rQ r r r getStateFor6 s zJellyable.getStateForc C s< | | }|t| jd|| |g || |S )zH
@see: L{twisted.spread.interfaces.IJellyable.jellyFor}
r. )rK rL r rM r0 rN rh rO )r[ rQ rR r r r jellyFor9 s
zJellyable.jellyForN)r> rb rc rd rh ri r r r r rg / rg c @ rf ) Unjellyablezf
Inherit from me to Unjelly yourself directly with the
C{setStateFor} convenience method.
c C s
|| _ d S r" r# )r[ rV r% r r r setStateForN r) zUnjellyable.setStateForc C s | |d }| || | S )z
Perform the inverse operation of L{Jellyable.jellyFor}.
@see: L{twisted.spread.interfaces.IUnjellyable.unjellyFor}
rT )rU rl )r[ rV rW r% r r r
unjellyForQ s zUnjellyable.unjellyForN)r> rb rc rd rl rm r r r r rk G rj rk c @ sZ e Zd ZdZdd Zdd Zdd Zdd Zd
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Z dd Z
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(Internal) This class manages state for a call to jelly()
c C s. || _ i | _i | _i | _d| _|| _|| _dS )z
Initialize.
rT N)taster preservedcookedcooker_ref_idpersistentStoreinvoker)r[ ro rt ru r r r r\ a s
z_Jellier.__init__c C sR | j t| }t|}| j}| jd | _t||g|dd< t|g| jt|< |S )a
(internal) Backreference an object.
Notes on this method for the hapless future maintainer: If I've already
gone through the prepare/preserve cycle on the specified object (it is
being referenced after the serializer is "done with" it, e.g. this
reference is NOT circular), the copy-in-place of aList is relevant,
since the list being modified is the actual, pre-existing jelly
expression that was returned for that object. If not, it's technically
superfluous, since the value in self.preserved didn't need to be set,
but the invariant that self.preserved[id(object)] is a list is
convenient because that means we don't have to test and create it or
not create it here, creating fewer code-paths. that's why
self.preserved is always set to a list.
Sorry that this code is so hard to follow, but Python objects are
tricky to persist correctly. -glyph
rT N)rp idcopyrs reference_atomdereference_atomrq )r[ objectaListnewListrefidr r r _cookp s
z_Jellier._cookc C s g | j t|< || jt|< g S )a]
(internal) Create a list for persisting an object to. This will allow
backreferences to be made internal to the object. (circular
references).
The reason this needs to happen is that we don't generate an ID for
every object, so we won't necessarily know which ID the object will
have in the future. When it is 'cooked' ( see _cook ), it will be
assigned an ID, and the temporary placeholder list created here will be
modified in-place to create an expression that gives this object an ID:
[reference id# [object-jelly]].
)rp rv rr )r[ rz r r r rK s z_Jellier.preparec C sD t || jv r|| jt | d< | jt | }|S || jt |< |S )zQ
(internal) Mark an object's persistent list for later referral.
)rv rq rp )r[ rz sexpr r r rO s z_Jellier.preservec C s> t |}|| jv r| j| S || jv r | | | j| S d S r" )rv rq rp r~ )r[ objobjIdr r r
_checkMutable s
z_Jellier._checkMutablec
C s t |tr| |}|r|S || S t|}| jt|dr|t t
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rH|j}|j}|j}d|j| || |gS |tu rSd|dgS t |td r]dgS t |t jrmd|jd |j gS t |t jrxd|jgS |tu rd |rd
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d } | j=r| =|| } | d ur|6t> |6| n/| j?|jr|6|
t@|dr|A } n|jB} |6| | n | Cdt|j | | D||S tEd| d| )Nr. s method unicodeUTF-8r r .r boolean true falsez2Currently can't jelly datetime objects with tzinfo datetime c S g | ]}t |qS r re .0xr r r
z"_Jellier.jelly.. timec S r r r r r r r r r datec S r r r r r r r r timedeltac S r r r r r r r r
r r rI z$instance of class %s deemed insecurez Type not allowed for object: )Fr rg r ri r ro
isTypeAllowedr r0 r/ intfloattypes
MethodType__self____func__rM r> rN re FunctionTyperb rc
ModuleTypebooldatetimetzinfoNotImplementedErrorjoinyearmonthdayhourminutesecond microsecondtimedate timedeltadaysseconds microsecondsr@ decimalDecimal
jelly_decimalrK listrL _jellyIterable list_atomtuple
tuple_atom DictTypesappenddictionary_atomitemssetset_atom frozensetfrozenset_atomrt persistent_atomisClassAllowedrJ rI r$
unpersistablerO
InsecureJelly)
r[ r preRefobjTypeaSelfaFuncaClassrR keyval className
persistentr% r r r rN s
z_Jellier.jellyc c s" |V |D ]}| |V qdS )a
Jelly an iterable object.
@param atom: the identifier atom of the object.
@type atom: C{str}
@param obj: any iterable object.
@type obj: C{iterable}
@return: a generator of jellied data.
@rtype: C{generator}
N)rN )r[ atomr itemr r r r < s
z_Jellier._jellyIterablec C s0 | \}}}tdd |}|r| }d||gS )z
Jelly a decimal object.
@param d: a decimal object to serialize.
@type d: C{decimal.Decimal}
@return: jelly for the decimal object.
@rtype: C{list}
c S s | d | S )N
r )leftrightr r r X s z(_Jellier.jelly_decimal.. decimal)as_tupler )r[ dsigngutsexponentvaluer r r r M s
z_Jellier.jelly_decimalNc C s8 |du rg }| t t|tr|d}| | |S )z
(internal) Returns an sexp: (unpersistable "reason"). Utility method
for making note that a particular object could not be serialized.
Nr. )r unpersistable_atomr re r0 )r[ rZ rR r r r r ] s
z_Jellier.unpersistabler" )
r> rb rc rd r\ r~ rK rO r rN r r r r r r r rn \ s rn c @ s e Zd Zdd Zdd Zdd Zdd Zd d
Zd d Zd
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dd Zdd Zdd Zd d Zd d Zd!d" Zd#d$ Zd%d& Zd'd( Zd)d* Zd+d, Zd-d. Zd/d0 Zd1d2 Zd3d4 Z d5d6 Z d7d8 Z d9d: Z d;S )<
_Unjellierc C s" || _ || _i | _g | _|| _d S r" )ro persistentLoad
references
postCallbacksru )r[ ro r ru r r r r\ l s
z_Unjellier.__init__c C s | |}| jD ]}| q|S r" )rU r )r[ r omr r r unjellyFulls s
z_Unjellier.unjellyFullc C s t |dr | j|j |S )z
If the given object has support for the C{postUnjelly} hook, set it up
to be called at the end of deserialization.
@param unjellied: an object that has already been unjellied.
@return: C{unjellied}
postUnjelly)rJ r r r )r[ unjelliedr r r _maybePostUnjellyy s
z _Unjellier._maybePostUnjellyc C s& t |tur|S |d }| j|st|t|}|d ur/tt|d|}| || |S t
|}|d urD| || |d S t |}t| d| d }|d ur\||dd S |
d}d|d d } | j| s{td| d| d t|}
| j|
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| | |
|d S ) Nr rm rT z _unjelly_%sr zModule z not allowed (in type z).zClass %s not allowed.)r r ro r r r5 getr+ r! r r; rU r splitr isModuleAllowedr r _genericUnjelly) r[ r jelTypeBytesregClassmethod
regFactory jelTypeTextthunk nameSplitmodNameclzr r r rU s4
z_Unjellier.unjellyc C s | t|| |S )a
Unjelly a type for which no specific unjellier is registered, but which
is nonetheless allowed.
@param cls: the class of the instance we are unjellying.
@type cls: L{type}
@param state: The jellied representation of the object's state; its
C{__dict__} unless it has a C{__setstate__} that takes something
else.
@type state: L{list}
@return: the new, unjellied instance.
)r r- rU )r[ r r% r r r r s z_Unjellier._genericUnjellyc C s d S r" r r[ expr r r
_unjelly_None s z_Unjellier._unjelly_Nonec C s t |d dS )Nr r r r r r r _unjelly_unicode ra z_Unjellier._unjelly_unicodec C sD |d }|d }|dk rd}nd}t | d }t |||fS )z*
Unjelly decimal objects.
r rT )r r r )r[ r r r r r r r r _unjelly_decimal s z_Unjellier._unjelly_decimalc C s |d dv sJ |d dkS )Nr )r r r r r r r r _unjelly_boolean s z_Unjellier._unjelly_booleanc C s t j tt|d S Nr )r mapr r r r r r _unjelly_datetime z _Unjellier._unjelly_datetimec C t jtt|d S r )r r r r r r r r r
_unjelly_date r z_Unjellier._unjelly_datec C r r )r r r r r r r r r
_unjelly_time r z_Unjellier._unjelly_timec C s( t t|d \}}}tj|||dS )Nr )r r r )r r r r r )r[ r r r r r r r _unjelly_timedelta s z _Unjellier._unjelly_timedeltac C s, | |}t|tr||| |||< |S r" )rU r r addDependant)r[ r locjelr r r r unjellyInto s
z_Unjellier.unjellyIntoc C s6 |d }| j |}|d ur|S t|}|| j |< |S r )r r r )r[ lstr} r derr r r _unjelly_dereference s
z _Unjellier._unjelly_dereferencec C sf |d }|d }| |}| j|}|d u r || j|< |S t|tr/|| || j|< |S J d)Nr rT z!Multiple references with same ID!)rU r r r r resolveDependants)r[ r r} r r refr r r _unjelly_reference s
z _Unjellier._unjelly_referencec C sN t tt|}d}|D ]}t| |||| tr d}q |r#t|S t|S )NrT r )r rangelenr r r r r
)r[ r lfinishedelemr r r _unjelly_tuple s z_Unjellier._unjelly_tuplec C s0 t tt|}|D ] }| |||| q
|S r" )r r
r r )r[ r r r r r r
_unjelly_list s z_Unjellier._unjelly_listc C sT t tt|}d}|D ]}| |||| }t|tr d}q |s&t||S ||S )z
Helper method to unjelly set or frozenset.
@param lst: the content of the set.
@type lst: C{list}
@param containerType: the type of C{set} to use.
TF)r r
r r r r r )r[ r
containerTyper r r datar r r _unjellySetOrFrozenset s
z!_Unjellier._unjellySetOrFrozensetc C | |tS )z7
Unjelly set using the C{set} builtin.
)r r r[ r r r r _unjelly_set z_Unjellier._unjelly_setc C r )zC
Unjelly frozenset using the C{frozenset} builtin.
)r r r r r r _unjelly_frozenset" r z _Unjellier._unjelly_frozensetc C s: i }|D ]\}}t |}| |d| | |d| q|S )Nr rT )r r )r[ r r kvkvdr r r _unjelly_dictionary( s z _Unjellier._unjelly_dictionaryc C sL t |d }t|tkrtd| j|s td|t|i i d}|S )Nr z5Attempted to unjelly a module with a non-string name.z"Attempted to unjelly module named r )r r re r ro r
__import__)r[ rest
moduleNamemodr r r _unjelly_module0 s z_Unjellier._unjelly_modulec C s t |d }|t d}t d|d d }| j|s$td| t|}t|}|tur8td||f | j|sFtdt | |S )Nr r r zmodule %s not allowedz6class %r unjellied to something that isn't a class: %rzclass not allowed: %s)
r r r ro r r r r r r )r[ r! cnameclistr klausr r r r _unjelly_class9 s z_Unjellier._unjelly_classc C sT t |d }|t d}t d|d d }| j|s$td| t|}|S )Nr r r zModule not allowed: %s)r r r ro r r r
)r[ r! fnamemodSplitr functionr r r _unjelly_functionJ s z _Unjellier._unjelly_functionc C s" | j r
| |d | }|S tdS )Nr z Persistent callback not found)r rY )r[ r! ploadr r r _unjelly_persistentT s z _Unjellier._unjelly_persistentc C s0 t jdtddd | |d }| ||d S )z
(internal) Unjelly an instance.
Called to handle the deprecated I{instance} token.
@param rest: The s-expression representing the instance.
@return: The unjellied instance.
ztUnjelly support for the instance atom is deprecated since Twisted 15.0.0. Upgrade peer for modern instance support. r )categoryfilenamelinenorT )warnings
warn_explicitDeprecationWarningrU r )r[ r! r r r r _unjelly_instance[ s
z _Unjellier._unjelly_instancec C s t d|d S )NzUnpersistable data: r )rY )r[ r! r r r _unjelly_unpersistablep s z!_Unjellier._unjelly_unpersistablec C s |d }| |d }| |d }t|tstd||jv rJ|du r+t||}|S t|tr8t|||}|S tj |j| |g|gd R }|S t
d)z.
(internal) Unjelly a method.
r rT r z"Method found with non-class class.NFzinstance method changed) rU r r r r$ r+ r r r r rA )r[ r! im_nameim_selfim_classimr r r _unjelly_methods s&
z_Unjellier._unjelly_methodN) r> rb rc r\ r r rU r r r r r r r r r r r r r r r r r r r$ r( r, r. r6 r7 r< r r r r r k s<
r c @ s e Zd ZdZdS )r z
This exception will be raised when a jelly is deemed `insecure'; e.g. it
contains a type, class, or module disallowed by the specified `taster'
N)r> rb rc rd r r r r r s r c @ s( e Zd ZdZdd Zdd Zdd ZdS ) DummySecurityOptionsz{
DummySecurityOptions() -> insecure security options
Dummy security options -- this class will allow anything.
c C dS )z
DummySecurityOptions.isModuleAllowed(moduleName) -> boolean
returns 1 if a module by that name is allowed, 0 otherwise
rT r r[ r" r r r r z$DummySecurityOptions.isModuleAllowedc C r> )z
DummySecurityOptions.isClassAllowed(class) -> boolean
Assumes the module has already been allowed. Returns 1 if the given
class is allowed, 0 otherwise.
rT r r[ klassr r r r s z#DummySecurityOptions.isClassAllowedc C r> )z
DummySecurityOptions.isTypeAllowed(typeName) -> boolean
Returns 1 if the given type is allowed, 0 otherwise.
rT r r[ typeNamer r r r r@ z"DummySecurityOptions.isTypeAllowedN)r> rb rc rd r r r r r r r r= s
r= c @ sX e Zd ZdZg dZdd Zdd Zdd Zd d
Zd d Z d
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This will by default disallow everything, except for 'none'.
)
dictionaryr r reference dereferencer r long_intlongdictc C sv i ddddddddddddddd dd
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ddddddddd| _ i | _i | _dS )z/
SecurityOptions() initialize.
r rT s boolr s strings strs ints floatr r r r s NoneTyper r r r N) allowedTypesallowedModulesallowedClassesr_ r r r r\ sF
zSecurityOptions.__init__c C s | j | j dS )zz
Allow all `basic' types. (Dictionary and list. Int, string, and float
are implicitly allowed.)
N)r7
basicTypesr_ r r r allowBasicTypes s z SecurityOptions.allowBasicTypesc G s> |D ]}t |tr|d}t |tst|}d| j|< qdS )zg
SecurityOptions.allowTypes(typeString): Allow a particular type, by its
name.
r. rT N)r re r0 r/ r rL )r[ r typr r r r7 s
zSecurityOptions.allowTypesc G sJ | | dddd |D ]}| t| | |j d| j|< qdS )a
SecurityOptions.allowInstances(klass, klass, ...): allow instances
of the specified classes
This will also allow the 'instance', 'class' (renamed 'classobj' in
Python 2.3), and 'module' types, as well as basic types.
r' classclassobjrB rT N)rP r7 r allowModulesrb rN )r[ classesrB r r r allowInstancesOf s z SecurityOptions.allowInstancesOfc G s@ |D ]}t |tjkr|j}t|ts|d}d| j|< qdS )z
SecurityOptions.allowModules(module, module, ...): allow modules by
name. This will also allow the 'module' type.
r. rT N)r r r r> r r/ r0 rM )r[ modulesrB r r r rT s
z SecurityOptions.allowModulesc C s t |ts
|d}|| jv S )z
SecurityOptions.isModuleAllowed(moduleName) -> boolean
returns 1 if a module by that name is allowed, 0 otherwise
r. )r r/ r0 rM r? r r r r s
z SecurityOptions.isModuleAllowedc C s
|| j v S )z
SecurityOptions.isClassAllowed(class) -> boolean
Assumes the module has already been allowed. Returns 1 if the given
class is allowed, 0 otherwise.
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SecurityOptions.isTypeAllowed(typeName) -> boolean
Returns 1 if the given type is allowed, 0 otherwise.
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Serialize to s-expression.
Returns a list which is the serialized representation of an object. An
optional 'taster' argument takes a SecurityOptions and will mark any
insecure objects as unpersistable rather than serializing them.
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Unserialize from s-expression.
Takes a list that was the result from a call to jelly() and unserializes
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of SecurityOptions, will cause an InsecureJelly exception to be raised if a
disallowed type, module, or class attempted to unserialize.
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