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5 s\ Q Q\2 2 s\ 2 sP! )zwPolicy framework for the email package.
Allows fine grained feature control of how the package parses and emits data.
)�header)�charset)�_has_surrogates�Policy�Compat32z
[!-9;-~]+$c �\ � [ O U 2 % f [ Q U 8 02 gP! )z/Header field name contains invalid characters: )�valid_header_name_re�match�
ValueError)�names &�&C:\Python315\\Lib\email\_policybase.py�validate_header_namer s1 � � � %� %�d� +� +��=�d�X� F�H� H� ,� c �P ` `� \ sQ s]s nQsU 1Q ksQ sQ sQ sQ s Qs
Us U 9s ! )� _PolicyBaseaK Policy Object basic framework.
This class is useless unless subclassed. A subclass should define
class attributes with defaults for any values that are to be
managed by the Policy object. The constructor will then allow
non-default values to be set for these attributes at instance
creation time. The instance will be callable, taking these same
attributes keyword arguments, and returning a new instance
identical to the called instance except for those values changed
by the keyword arguments. Instances may be added, yielding new
instances with any non-default values from the right hand
operand overriding those in the left hand operand. That is,
A + B == A(<non-default values of B>)
The repr of an instance can be used to reconstruct the object
if and only if the repr of the values can be used to reconstruct
those values.
c �� :� UO 2 F DW v q#[ V2 % c [ [ U _ V#2 J+ [ QO
V O O 2 2 g P! )zrCreate new Policy, possibly overriding some defaults.
See class docstring for a list of overridable attributes.
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c �� � U O O 2 TTt, tF D v qQ O V2 MJ oooQO U O O QO U2 2 ! t tooh )z{}={!r}z{}({})z, )�__dict__r r r r �join)r r
r �argss & r �__repr__�_PolicyBase.__repr__@ sd � �$(�M�M�$7�$7�$9�<�$9�[�T� �!�!�$�.�$9�
� <����t�~�~� 6� 6�� � �$��H�H��<s � A4c � � U O O U O 2 oU O O 2 F D v q4[ O V#U2 J UO 2 F DZ v q4[
V2 % f/ [ QO V0O O 2 2 g[ O V#U2 J\ U! )z�Return a new instance with specified attributes changed.
The new instance has the same attribute values as the current object,
except for the changes passed in as keyword arguments.
r )
r �__new__r r �objectr r r r r )r r � newpolicy�attrr s &, r �clone�_PolicyBase.cloneE s� � � �N�N�*�*�4�>�>�:� � �=�=�.�.�0�K�D� � � �y�� 6� 1� �8�8�:�K�D��4�&�&� �@�G�G� �n�n� 5� 5�7�8� 8�
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c � � [ V2 % c Q oLQo[ UO U O O U2 2 g)z'{!r} object attribute {!r} is read-onlyz!{!r} object has no attribute {!r})r �AttributeErrorr r r )r r
r �msgs &&& r r �_PolicyBase.__setattr__W s7 � � �4� � �;�C�5�C� �S�Z�Z����(?�(?�� F�G�Gr
c �> � U O Q- UO @ ! )zyNon-default values from right operand override those from left.
The object returned is a new instance of the subclass.
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Controls for how messages are interpreted and formatted.
Most of the classes and many of the methods in the email package accept
Policy objects as parameters. A Policy object contains a set of values and
functions that control how input is interpreted and how output is rendered.
For example, the parameter 'raise_on_defect' controls whether or not an RFC
violation results in an error being raised or not, while 'max_line_length'
controls the maximum length of output lines when a Message is serialized.
Any valid attribute may be overridden when a Policy is created by passing
it as a keyword argument to the constructor. Policy objects are immutable,
but a new Policy object can be created with only certain values changed by
calling the Policy instance with keyword arguments. Policy objects can
also be added, producing a new Policy object in which the non-default
attributes set in the right hand operand overwrite those specified in the
left operand.
Settable attributes:
raise_on_defect -- If true, then defects should be raised as errors.
Default: False.
linesep -- string containing the value to use as separation
between output lines. Default '\n'.
cte_type -- Type of allowed content transfer encodings
7bit -- ASCII only
8bit -- Content-Transfer-Encoding: 8bit is allowed
Default: 8bit. Also controls the disposition of
(RFC invalid) binary data in headers; see the
documentation of the binary_fold method.
max_line_length -- maximum length of lines, excluding 'linesep',
during serialization. None or 0 means no line
wrapping is done. Default is 78.
mangle_from_ -- a flag that, when True escapes From_ lines in the
body of the message by putting a '>' in front of
them. This is used when the message is being
serialized by a generator. Default: False.
message_factory -- the class to use to create new message objects.
If the value is None, the default is Message.
verify_generated_headers
-- if true, the generator verifies that each header
they are properly folded, so that a parser won't
treat it as multiple headers, start-of-body, or
part of another header.
This is a check against custom Header & fold()
implementations.
r> �8bitc �R � U O % c UgU O V2 P! )a Based on policy, either raise defect or call register_defect.
handle_defect(obj, defect)
defect should be a Defect subclass, but in any case must be an
Exception subclass. obj is the object on which the defect should be
registered if it is not raised. If the raise_on_defect is True, the
defect is raised as an error, otherwise the object and the defect are
passed to register_defect.
This method is intended to be called by parsers that discover defects.
The email package parsers always call it with Defect instances.
)�raise_on_defect�register_defect�r �obj�defects &&&r �
handle_defect�Policy.handle_defect� s# � � � � � ��L� � � �S�)r
c �> � UO O U2 P! )a� Record 'defect' on 'obj'.
Called by handle_defect if raise_on_defect is False. This method is
part of the Policy API so that Policy subclasses can implement custom
defect handling. The default implementation calls the append method of
the defects attribute of obj. The objects used by the email package by
default that get passed to this method will always have a defects
attribute with an append method.
)�defects�appendrW s &&&r rV �Policy.register_defect� s � � � � ���6�"r
c � � P! )a� Return the maximum allowed number of headers named 'name'.
Called when a header is added to a Message object. If the returned
value is not 0 or None, and there are already a number of headers with
the name 'name' equal to the value returned, a ValueError is raised.
Because the default behavior of Message's __setitem__ is to append the
value to the list of headers, it is easy to create duplicate headers
without realizing it. This method allows certain headers to be limited
in the number of instances of that header that may be added to a
Message programmatically. (The limit is not observed by the parser,
which will faithfully produce as many headers as exist in the message
being parsed.)
The default implementation returns None for all header names.
r1 )r r
s &&r �header_max_count�Policy.header_max_count� s � �" r
c � � [ g)a2 Given a list of linesep terminated strings constituting the lines of
a single header, return the (name, value) tuple that should be stored
in the model. The input lines should retain their terminating linesep
characters. The lines passed in by the email package may contain
surrogateescaped binary data.
��NotImplementedError)r � sourceliness &&r �header_source_parse�Policy.header_source_parse� �
� � "�!r
c � � [ g)z�Given the header name and the value provided by the application
program, return the (name, value) that should be stored in the model.
rd �r r
r s &&&r �header_store_parse�Policy.header_store_parse� s
� �
"�!r
c � � [ g)aO Given the header name and the value from the model, return the value
to be returned to the application program that is requesting that
header. The value passed in by the email package may contain
surrogateescaped binary data if the lines were parsed by a BytesParser.
The returned value should not contain any surrogateescaped data.
rd rk s &&&r �header_fetch_parse�Policy.header_fetch_parse� s
� � "�!r
c � � [ g)an Given the header name and the value from the model, return a string
containing linesep characters that implement the folding of the header
according to the policy controls. The value passed in by the email
package may contain surrogateescaped binary data if the lines were
parsed by a BytesParser. The returned value should not contain any
surrogateescaped data.
rd rk s &&&r �fold� Policy.fold s
� � "�!r
c � � [ g)a Given the header name and the value from the model, return binary
data containing linesep characters that implement the folding of the
header according to the policy controls. The value passed in by the
email package may contain surrogateescaped binary data.
rd rk s &&&r � fold_binary�Policy.fold_binary ri r
r1 )r r5 r6 r7 r8 rU �linesep�cte_type�max_line_length� mangle_from_�message_factory�verify_generated_headersrZ rV ra �abc�abstractmethodrg rl ro rr ru r9 r: �r< s @r r r y s� �� � �5�n �O��G��H��O��L��O� #� �*�& #��& ���"� �"� ���"� �"� ���"� �"� ��� "� � "� ���"� �"r
)� metaclassc �T ` � \ sQ sQs n QsP sQ sQ sQ sQ s Q s
Q s Q s Q
s
U sP! ) r � z}+
This particular policy is the backward compatibility Policy. It
replicates the behavior of the email package version 5.1.
c � � [ U[ 2 % f U! [ U2 % c( [ O U[
O UQ 5 ! U! )�r � header_name)�
isinstance�strr r �Header�_charset� UNKNOWN8BITrk s &&&r �_sanitize_header�Compat32._sanitize_header* sF � � �%��%�%��L� �5� !� !��=�=���0D�0D�-1�3�
3� �Lr
c � � U] * O Q]2 v q#PO U,UQ* N32 O Q2 oV#O Q2 1! )a +
The name is parsed as everything up to the ':' and returned unmodified.
The value is determined by stripping leading whitespace off the
remainder of the first line joined with all subsequent lines, and
stripping any trailing carriage return or linefeed characters.
�::� NNz
z
)r@ r! �lstrip�rstrip)r rf r
r s && r rg � Compat32.header_source_parse6 sS � � "�!�n�*�*�3��2� ������1��R� �1�2�9�9�)�D���l�l�6�*�+�+r
c � � [ U2 V1! )z.+
The name and value are returned unmodified.
)r rk s &&&r rl �Compat32.header_store_parseB s � � �T�"��}� r
c �& � U O V2 ! )z�+
If the value contains binary data, it is converted into a Header object
using the unknown-8bit charset. Otherwise it is returned unmodified.
)r� rk s &&&r ro �Compat32.header_fetch_parseI s � �
�$�$�T�1�1r
c �* � U O VP Q5 ! )z�+
Headers are folded using the Header folding algorithm, which preserves
existing line breaks in the value, and wraps each resulting line to the
max_line_length. Non-ASCII binary data are CTE encoded using the
unknown-8bit charset.
��sanitize)�_foldrk s &&&r rr �
Compat32.foldP s � � �z�z�$��z�5�5r
c �h � U O VU O Q6H Q5 oUO QQ2 ! )a_ +
Headers are folded using the Header folding algorithm, which preserves
existing line breaks in the value, and wraps each resulting line to the
max_line_length. If cte_type is 7bit, non-ascii binary data is CTE
encoded using the unknown-8bit charset. Otherwise the original source
header is used, with its existing line breaks and/or binary data.
�7bitr� �ascii�surrogateescape)r� rx �encode)r r
r �foldeds &&& r ru �Compat32.fold_binaryZ s1 � � ���D�$�-�-��2G��H���}�}�W�&7�8�8r
c �2 � , oUO Q U* 2 [ U[ 2 % cn [ U2 % cE U% c) [ O
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U O oUO UO U O UQ5 2 UO U O 2 PO U2 ! )z%s: r� )r� )rw �
maxlinelen) r^ r� r� r r r� r� r� ry r� rw r! )r r
r r� �parts�hr� s &&&& r r� �Compat32._foldf s� � ���
� � �V�d�]�#� �e�S� !� !� �u�%�%�� �
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