Nf&^dZgdZddlZddlZddlZddlZddlmZddlm Z e j Z dZ dZ dZd Zd Zd Zd Ze d Ze dZejdejejzZejdZejdZejjZdZ ddZGddZGddZ Gdde!Z"dS)z+Header encoding and decoding functionality.)Header decode_header make_headerN)HeaderParseError)charset   z Nz us-asciizutf-8ai =\? # literal =? (?P[^?]*?) # non-greedy up to the next ? is the charset \? # literal ? (?P[qQbB]) # either a "q" or a "b", case insensitive \? # literal ? (?P.*?) # non-greedy up to the next ?= is the encoded string \?= # literal ?= z[\041-\176]+:$z \n[^ \t]+:ct|drd|jDSt|s|dfgSg}|D]}t|}d}|r|d}|r|}d}|r||ddf|r{|d }|d }|d}||||f|ƌg} t|D]_\} } | dkrT| drL|| dz dr;|| dz d r| | dz `t| D]} || =g} |D]\}}}|| ||f |d kr7tj|}| ||f]|d kr~t!|d z}|r|d dd |z z } tj|}| ||f#t&j$rt+d wxYwt-d|zg}dx}}| D]h\}}t/|t0rt3|d}||}|}1||kr|||f|}|}S||t4|zz }c||z }i|||f|S)a;Decode a message header value without converting charset. Returns a list of (string, charset) pairs containing each of the decoded parts of the header. Charset is None for non-encoded parts of the header, otherwise a lower-case string containing the name of the character set specified in the encoded string. header may be a string that may or may not contain RFC2047 encoded words, or it may be a Header object. An email.errors.HeaderParseError may be raised when certain decoding error occurs (e.g. a base64 decoding exception). _chunkscvg|]6\}}tj|t|t|f7S)_charset_encodestr).0stringrs #/usr/lib/python3.11/email/header.py z!decode_header..MsJ;;;'!&#g,,77WF;;;NTrFqbz===zBase64 decoding errorzUnexpected encoding: zraw-unicode-escape)hasattrrecresearch splitlinessplitpoplstripappendlower enumerateisspacereversedemail quoprimime header_decodelen base64mimedecodebinasciiErrorrAssertionError isinstancerbytesBSPACE)headerwordslinepartsfirst unencodedrencodingencodeddroplistnwd decoded_wordsencoded_stringwordpaderr collapsed last_word last_charsets rrr=svy!!;;;+1>;;; ; ;;v    E!!##;; 4   ; ! I %,,..  6 it4555 ;))A,,,,.. 99Q<<--//))A,, gx9::: ;H%  !!1 Q331Q43E!A#JqM3eAaCjm.C.C.E.E3 OOAaC h   !HH M-2EE)'    .'!: ; ; ; ; __#11.AAD  $ 1 1 1 1 __((1,F 5% V "44 6'..~>>$$dG_5555> @ @ @&'>??? @ !!88!CDD DI##I &   g dC  5344D  I"LL  $ $   i6 7 7 7I"LL  ! $ &II  II i./// s JJ&ct|||}|D]A\}}|$t|tst|}|||B|S)aCreate a Header from a sequence of pairs as returned by decode_header() decode_header() takes a header value string and returns a sequence of pairs of the format (decoded_string, charset) where charset is the string name of the character set. This function takes one of those sequence of pairs and returns a Header instance. Optional maxlinelen, header_name, and continuation_ws are as in the Header constructor. ) maxlinelen header_namecontinuation_ws)rr4Charsetr&) decoded_seqrKrLrMhsrs rrrsp *+. 0 0 0A! 7  z'7'C'C g&&G G HrcDeZdZ d dZdZdZddZdZdd Zd Z dS)rNr strictc"|t}n$t|tst|}||_||_g|_||||||t}||_| d|_ dSt|dz|_ dS)aDCreate a MIME-compliant header that can contain many character sets. Optional s is the initial header value. If None, the initial header value is not set. You can later append to the header with .append() method calls. s may be a byte string or a Unicode string, but see the .append() documentation for semantics. Optional charset serves two purposes: it has the same meaning as the charset argument to the .append() method. It also sets the default character set for all subsequent .append() calls that omit the charset argument. If charset is not provided in the constructor, the us-ascii charset is used both as s's initial charset and as the default for subsequent .append() calls. 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