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a �c D � @ s� d dl mZ d dl mZ d dl mZ d dlmZ d dlmZ g d�Zd dlm Z d dl m Z d d l m Z d d lmZ d Zd Zd ZdZdZdZdZeedfeedfeedfeedfeedfeedfeedfeedfeedfeedfeedfeedfdeedfeedfeddfeddfeddfeedfeedfd�Zddddddddddd d d d d d d d d d d!d"d#dd$�Zd%d&dd'�Zd2d(d)�Zd*d+� Zd,d-� Z d.d/� Z G d0d1� d1e �Z dS )3� )�unicode_literals)�division)�absolute_import)�str)�next)�Charset� add_alias� add_charset� add_codec)�partial)�email)�errors)�encode_7or8bit� � � � �us-asciiz unknown-8bit� N)NNN� iso-2022-jp�utf-8)� iso-8859-1� iso-8859-2� iso-8859-3� iso-8859-4� iso-8859-9� iso-8859-10� iso-8859-13� iso-8859-14� iso-8859-15� iso-8859-16z windows-1252Zvisciir �big5�gb2312�euc-jp� shift_jisr zkoi8-rr r r r r r r r r r r zks_c_5601-1987r# zeuc-kr)�latin_1zlatin-1Zlatin_2zlatin-2Zlatin_3zlatin-3Zlatin_4zlatin-4Zlatin_5zlatin-5Zlatin_6zlatin-6Zlatin_7zlatin-7Zlatin_8zlatin-8Zlatin_9zlatin-9Zlatin_10zlatin-10�cp949�euc_jp�euc_kr�ascii� eucgb2312_cn�big5_tw)r" r! r c C s" |t krtd��|||ft| < dS )a> Add character set properties to the global registry. charset is the input character set, and must be the canonical name of a character set. Optional header_enc and body_enc is either Charset.QP for quoted-printable, Charset.BASE64 for base64 encoding, Charset.SHORTEST for the shortest of qp or base64 encoding, or None for no encoding. SHORTEST is only valid for header_enc. It describes how message headers and message bodies in the input charset are to be encoded. Default is no encoding. Optional output_charset is the character set that the output should be in. Conversions will proceed from input charset, to Unicode, to the output charset when the method Charset.convert() is called. The default is to output in the same character set as the input. Both input_charset and output_charset must have Unicode codec entries in the module's charset-to-codec mapping; use add_codec(charset, codecname) to add codecs the module does not know about. See the codecs module's documentation for more information. z!SHORTEST not allowed for body_encN)�SHORTEST� ValueError�CHARSETS)�charsetZ header_encZbody_enc�output_charset� r1 �B/usr/lib/python3.9/site-packages/future/backports/email/charset.pyr n s r c C s |t | < dS )z�Add a character set alias. alias is the alias name, e.g. latin-1 canonical is the character set's canonical name, e.g. iso-8859-1 N)�ALIASES)�aliasZ canonicalr1 r1 r2 r � s r c C s |t | < dS )a$ Add a codec that map characters in the given charset to/from Unicode. charset is the canonical name of a character set. codecname is the name of a Python codec, as appropriate for the second argument to the unicode() built-in, or to the encode() method of a Unicode string. N)� CODEC_MAP)r/ Z codecnamer1 r1 r2 r � s r c C s* t | �} |tkr | �dd�S | �|�S d S )Nr) �surrogateescape)r � UNKNOWN8BIT�encode)�string�codecr1 r1 r2 �_encode� s r; c @ sh e Zd ZdZefdd�Zdd� ZeZdd� Zdd � Z d d � Z d d � Z dd� Z dd� Z dd� Zdd� ZdS )r a@ Map character sets to their email properties. This class provides information about the requirements imposed on email for a specific character set. It also provides convenience routines for converting between character sets, given the availability of the applicable codecs. Given a character set, it will do its best to provide information on how to use that character set in an email in an RFC-compliant way. Certain character sets must be encoded with quoted-printable or base64 when used in email headers or bodies. Certain character sets must be converted outright, and are not allowed in email. Instances of this module expose the following information about a character set: input_charset: The initial character set specified. Common aliases are converted to their `official' email names (e.g. latin_1 is converted to iso-8859-1). Defaults to 7-bit us-ascii. header_encoding: If the character set must be encoded before it can be used in an email header, this attribute will be set to Charset.QP (for quoted-printable), Charset.BASE64 (for base64 encoding), or Charset.SHORTEST for the shortest of QP or BASE64 encoding. Otherwise, it will be None. body_encoding: Same as header_encoding, but describes the encoding for the mail message's body, which indeed may be different than the header encoding. Charset.SHORTEST is not allowed for body_encoding. output_charset: Some character sets must be converted before they can be used in email headers or bodies. If the input_charset is one of them, this attribute will contain the name of the charset output will be converted to. Otherwise, it will be None. input_codec: The name of the Python codec used to convert the input_charset to Unicode. If no conversion codec is necessary, this attribute will be None. output_codec: The name of the Python codec used to convert Unicode to the output_charset. If no conversion codec is necessary, this attribute will have the same value as the input_codec. c C s� z$t |t�r|�d� n t|d�}W n ty@ t�|��Y n0 |�� }t�||�| _ t �| j t t d f�\}}}|s|| j }|| _ || _t�||�| _t�| j | j �| _t�| j| j�| _d S )Nr) )� isinstancer r8 � UnicodeErrorr Z CharsetError�lowerr3 �get� input_charsetr. r, �BASE64�header_encoding� body_encodingr0 r5 Z input_codec� output_codec)�selfr@ ZhencZbenc�convr1 r1 r2 �__init__� s, � ��zCharset.__init__c C s | j �� S �N)r@ r> �rE r1 r1 r2 �__str__� s zCharset.__str__c C s t | �t |��� kS rH )r r> �rE �otherr1 r1 r2 �__eq__� s zCharset.__eq__c C s | � |� S rH )rM rK r1 r1 r2 �__ne__� s zCharset.__ne__c C s$ | j tkrdS | j tkr dS tS dS )aP Return the content-transfer-encoding used for body encoding. This is either the string `quoted-printable' or `base64' depending on the encoding used, or it is a function in which case you should call the function with a single argument, the Message object being encoded. The function should then set the Content-Transfer-Encoding header itself to whatever is appropriate. Returns "quoted-printable" if self.body_encoding is QP. Returns "base64" if self.body_encoding is BASE64. Returns conversion function otherwise. zquoted-printable�base64N)rC �QPrA r rI r1 r1 r2 �get_body_encoding� s zCharset.get_body_encodingc C s | j p | jS )z�Return the output character set. This is self.output_charset if that is not None, otherwise it is self.input_charset. )r0 r@ rI r1 r1 r2 �get_output_charset s zCharset.get_output_charsetc C s6 | j pd}t||�}| �|�}|du r*|S |�||�S )a� Header-encode a string by converting it first to bytes. The type of encoding (base64 or quoted-printable) will be based on this charset's `header_encoding`. :param string: A unicode string for the header. It must be possible to encode this string to bytes using the character set's output codec. :return: The encoded string, with RFC 2047 chrome. r N)rD r; � _get_encoder� header_encode)rE r9 r: � header_bytes�encoder_moduler1 r1 r2 rT s zCharset.header_encodec C s | j pd}t||�}| �|�}t|j|d�}| �� }t|�t }g } g } t|�| } |D ]�} | � | � t � | �} |� t| |��}|| krX| � � | s�| s�| � d� n.| r�dnd}t � | �}t||�}| � ||�� | g} t|�| } qXt � | �}t||�}| � ||�� | S )af Header-encode a string by converting it first to bytes. This is similar to `header_encode()` except that the string is fit into maximum line lengths as given by the argument. :param string: A unicode string for the header. It must be possible to encode this string to bytes using the character set's output codec. :param maxlengths: Maximum line length iterator. Each element returned from this iterator will provide the next maximum line length. This parameter is used as an argument to built-in next() and should never be exhausted. The maximum line lengths should not count the RFC 2047 chrome. These line lengths are only a hint; the splitter does the best it can. :return: Lines of encoded strings, each with RFC 2047 chrome. r )r/ N� r )rD r; rS r rT rR �len�RFC2047_CHROME_LENr �append� EMPTYSTRING�join� header_length�pop)rE r9 Z maxlengthsr: rU rV �encoderr/ Zextra�linesZ current_line�maxlen� characterZ this_line�length� separatorZ joined_liner1 r1 r2 �header_encode_lines/ s6 zCharset.header_encode_linesc C s` | j tkrtjS | j tkr tjS | j tkrXtj�|�}tj�|�}||k rPtjS tjS nd S d S rH )rB rA r � base64mimerP � quoprimimer, r] )rE rU Zlen64Zlenqpr1 r1 r2 rS m s zCharset._get_encoderc C s� |s|S | j tu r4t|t�r(|�| j�}tj�|�S | j t u rjt|t�rT|�| j�}|� d�}tj �|�S t|t�r�|�| j�� d�}|S dS )av Body-encode a string by converting it first to bytes. The type of encoding (base64 or quoted-printable) will be based on self.body_encoding. If body_encoding is None, we assume the output charset is a 7bit encoding, so re-encoding the decoded string using the ascii codec produces the correct string version of the content. �latin1r) N) rC rA r< r r8 r0 r rf � body_encoderP �decoderg )rE r9 r1 r1 r2 ri | s zCharset.body_encodeN)�__name__� __module__� __qualname__�__doc__�DEFAULT_CHARSETrG rJ �__repr__rM rN rQ rR rT re rS ri r1 r1 r1 r2 r � s + !>r )NNN) Z __future__r r r Zfuture.builtinsr r �__all__� functoolsr Zfuture.backportsr Zfuture.backports.emailr Z future.backports.email.encodersr rP rA r, rY ro r7 r[ r. r3 r5 r r r r; �objectr r1 r1 r1 r2 �<module> s� � � �
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