charset.pyc
1 o 2 4�Hc|D � @ s� g d �Z ddlmZ ddlZddlZddlmZ ddlmZ dZ dZ 3 dZ d Z d 4 Z d Zd Zi d e e df�de e df�de e df�de e df�de e df�de e df�de e df�de e df�de e df�de e df�de e df�de e df�d 5 d�de 6 e 7 df�de 8 e 9 df�d e 10 dd f�d e 11 dd f�e 12 ddfe 13 e 14 dfe e 15 d fd ��Zi d!d �d"d �d#d�d$d�d%d�d&d�d'd�d(d�d)d�d*d�d+d�d,d�d-d�d.d�d/d�d0d�d1d�dddd2d d3d 16 d4��Zd5d6dd7�Zdd8d9�Zd:d;� Zd<d=� Zd>d?� ZG d@dA� dA�ZdS )B)�Charset� add_alias� add_charset� add_codec� )�partialN)�errors)�encode_7or8bit� � � � �us-asciiz unknown-8bit� z 17 iso-8859-1z 18 iso-8859-2z 19 iso-8859-3z 20 iso-8859-4z 21 iso-8859-9z iso-8859-10z iso-8859-13z iso-8859-14z iso-8859-15z iso-8859-16z windows-1252�viscii)NNN�big5�gb2312zeuc-jp� iso-2022-jp� shift_jis�utf-8)r zkoi8-rr �latin_1zlatin-1�latin_2zlatin-2�latin_3zlatin-3�latin_4zlatin-4�latin_5zlatin-5�latin_6zlatin-6�latin_7zlatin-7�latin_8zlatin-8�latin_9zks_c_5601-1987zeuc-kr)zlatin-9�latin_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. 22 23 charset is the input character set, and must be the canonical name of a 24 character set. 25 26 Optional header_enc and body_enc is either charset.QP for 27 quoted-printable, charset.BASE64 for base64 encoding, charset.SHORTEST for 28 the shortest of qp or base64 encoding, or None for no encoding. SHORTEST 29 is only valid for header_enc. It describes how message headers and 30 message bodies in the input charset are to be encoded. Default is no 31 encoding. 32 33 Optional output_charset is the character set that the output should be 34 in. Conversions will proceed from input charset, to Unicode, to the 35 output charset when the method Charset.convert() is called. The default 36 is to output in the same character set as the input. 37 38 Both input_charset and output_charset must have Unicode codec entries in 39 the module's charset-to-codec mapping; use add_codec(charset, codecname) 40 to add codecs the module does not know about. See the codecs module's 41 documentation for more information. 42 z!SHORTEST not allowed for body_encN)�SHORTEST� 43 ValueError�CHARSETS)�charset� 44 header_enc�body_enc�output_charset� r, �uC:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.10_3.10.2800.0_x64__qbz5n2kfra8p0\lib\email\charset.pyr m s r c C � |t | < dS )z�Add a character set alias. 45 46 alias is the alias name, e.g. latin-1 47 canonical is the character set's canonical name, e.g. iso-8859-1 48 N)�ALIASES)�alias� canonicalr, r, r- r � � r c C r. )a$ Add a codec that map characters in the given charset to/from Unicode. 49 50 charset is the canonical name of a character set. codecname is the name 51 of a Python codec, as appropriate for the second argument to the unicode() 52 built-in, or to the encode() method of a Unicode string. 53 N)� CODEC_MAP)r( � codecnamer, r, r- r � s r c C s |t kr 54 | �dd�S | �|�S )Nr" �surrogateescape)� UNKNOWN8BIT�encode)�string�codecr, r, r- �_encode� s 55 r: c @ s\ e Zd ZdZefdd�Zdd� Zdd� Zdd � Zd 56 d � Z d d � Z 57 dd� Z dd� Z dd� Z dS )r a@ Map character sets to their email properties. 58 59 This class provides information about the requirements imposed on email 60 for a specific character set. It also provides convenience routines for 61 converting between character sets, given the availability of the 62 applicable codecs. Given a character set, it will do its best to provide 63 information on how to use that character set in an email in an 64 RFC-compliant way. 65 66 Certain character sets must be encoded with quoted-printable or base64 67 when used in email headers or bodies. Certain character sets must be 68 converted outright, and are not allowed in email. Instances of this 69 module expose the following information about a character set: 70 71 input_charset: The initial character set specified. Common aliases 72 are converted to their `official' email names (e.g. latin_1 73 is converted to iso-8859-1). Defaults to 7-bit us-ascii. 74 75 header_encoding: If the character set must be encoded before it can be 76 used in an email header, this attribute will be set to 77 charset.QP (for quoted-printable), charset.BASE64 (for 78 base64 encoding), or charset.SHORTEST for the shortest of 79 QP or BASE64 encoding. Otherwise, it will be None. 80 81 body_encoding: Same as header_encoding, but describes the encoding for the 82 mail message's body, which indeed may be different than the 83 header encoding. charset.SHORTEST is not allowed for 84 body_encoding. 85 86 output_charset: Some character sets must be converted before they can be 87 used in email headers or bodies. If the input_charset is 88 one of them, this attribute will contain the name of the 89 charset output will be converted to. Otherwise, it will 90 be None. 91 92 input_codec: The name of the Python codec used to convert the 93 input_charset to Unicode. If no conversion codec is 94 necessary, this attribute will be None. 95 96 output_codec: The name of the Python codec used to convert Unicode 97 to the output_charset. If no conversion codec is necessary, 98 this attribute will have the same value as the input_codec. 99 c C s� zt |t�r |�d� nt|d�}W n ty t�|��w |�� }t�||�| _ t 100 �| j t t d f�\}}}|s<| j }|| _ || _t�||�| _t�| j | j �| _t�| j| j�| _d S )Nr" )� 101 isinstance�strr7 � UnicodeErrorr � CharsetError�lowerr/ �get� input_charsetr' r% �BASE64�header_encoding� body_encodingr+ r3 � input_codec� output_codec)�selfrA �henc�benc�convr, r, r- �__init__� s0 102 103 � 104 � 105 �� 106 �zCharset.__init__c C s 107 | j �� S �N)rA r? �rG r, r, r- �__repr__� s 108 zCharset.__repr__c C s t | �t |��� kS rL )r< r? )rG �otherr, r, r- �__eq__� s zCharset.__eq__c C s. | j tksJ �| j tkrdS | j tkrdS tS )aP Return the content-transfer-encoding used for body encoding. 109 110 This is either the string `quoted-printable' or `base64' depending on 111 the encoding used, or it is a function in which case you should call 112 the function with a single argument, the Message object being 113 encoded. The function should then set the Content-Transfer-Encoding 114 header itself to whatever is appropriate. 115 116 Returns "quoted-printable" if self.body_encoding is QP. 117 Returns "base64" if self.body_encoding is BASE64. 118 Returns conversion function otherwise. 119 zquoted-printable�base64)rD r% �QPrB r rM r, r, r- �get_body_encoding� s 120 121 zCharset.get_body_encodingc C s | j p| jS )z�Return the output character set. 122 123 This is self.output_charset if that is not None, otherwise it is 124 self.input_charset. 125 )r+ rA rM r, r, r- �get_output_charset r2 zCharset.get_output_charsetc C s6 | j pd}t||�}| �|�}|du r|S |�||�S )a� Header-encode a string by converting it first to bytes. 126 127 The type of encoding (base64 or quoted-printable) will be based on 128 this charset's `header_encoding`. 129 130 :param string: A unicode string for the header. It must be possible 131 to encode this string to bytes using the character set's 132 output codec. 133 :return: The encoded string, with RFC 2047 chrome. 134 r N)rF r: � _get_encoder� header_encode)rG r8 r9 � header_bytes�encoder_moduler, r, r- rV s 135 136 137 zCharset.header_encodec C s | j pd}t||�}| �|�}t|j|d�}| �� }t|�t }g } g } 138 t|�| } |D ]F} | 139 � | � t 140 � | 141 �} |� t| |��}|| krr| 142 � � | sR| 143 sR| � d� n| rVdnd}t 144 � | 145 �}t||�}| � ||�� | g} 146 t|�| } q,t 147 � | 148 �}t||�}| � ||�� | S )af Header-encode a string by converting it first to bytes. 149 150 This is similar to `header_encode()` except that the string is fit 151 into maximum line lengths as given by the argument. 152 153 :param string: A unicode string for the header. It must be possible 154 to encode this string to bytes using the character set's 155 output codec. 156 :param maxlengths: Maximum line length iterator. Each element 157 returned from this iterator will provide the next maximum line 158 length. This parameter is used as an argument to built-in next() 159 and should never be exhausted. The maximum line lengths should 160 not count the RFC 2047 chrome. These line lengths are only a 161 hint; the splitter does the best it can. 162 :return: Lines of encoded strings, each with RFC 2047 chrome. 163 r )r( N� r )rF r: rU r rV rT �len�RFC2047_CHROME_LEN�next�append� EMPTYSTRING�join� header_length�pop)rG r8 � 164 maxlengthsr9 rW rX �encoderr( �extra�lines� current_line�maxlen� character� this_line�length� separator� joined_liner, r, r- �header_encode_lines* s8 165 166 167 168 169 170 171 � 172 173 zCharset.header_encode_linesc C sZ | j tkrtjS | j tkrtjS | j tkr+tj�|�}tj�|�}||k r(tjS tjS d S rL )rC rB �email� 174 base64mimerR � 175 quoprimimer% r` )rG rW �len64�lenqpr, r, r- rU h s 176 177 178 zCharset._get_encoderc C s� |s|S | j tu rt|t�r|�| j�}tj�|�S | j t u r5t|t�r*|�| j�}|� 179 d�}tj �|�S t|t�rC|�| j�� 180 d�}|S )av Body-encode a string by converting it first to bytes. 181 182 The type of encoding (base64 or quoted-printable) will be based on 183 self.body_encoding. If body_encoding is None, we assume the 184 output charset is a 7bit encoding, so re-encoding the decoded 185 string using the ascii codec produces the correct string version 186 of the content. 187 �latin1r" ) rD rB r; r< r7 r+ rn ro � body_encoderR �decoderp )rG r8 r, r, r- rt w s 188 189 190 191 192 193 zCharset.body_encodeN)�__name__� 194 __module__� __qualname__�__doc__�DEFAULT_CHARSETrK rN rP rS rT rV rm rU rt r, r, r, r- r � s +!> r )�__all__� functoolsr �email.base64mimern �email.quoprimimer �email.encodersr rR rB r% r[ rz r6 r^ r' r/ r3 r r r r: r r, r, r, r- �<module> s� 195 � 196 � 197 � 198 � 199 200 � 201 � 202 � 203 � 204 � 205 � 206 � 207 �� 208 � 209 � 210 � 211 �� �������� � 212 � � � ������ � 213