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� { fc @ s6 d Z d d d g Z d d l Z d d l Z d d l Z d d l Z d d l m Z d d l m Z d Z d Z d Z d d Z d Z d Z e d � Z e d � Z e j d e j e j Be j B� Z e j d � Z e j d � Z e j j Z d � Z e e d d � Z d f d � � YZ d � Z d � Z! d S( s+ Header encoding and decoding functionality.t Headert decode_headert make_headeri����N( t HeaderParseError( t Charsets t u i u iL s us-asciis utf-8s� =\? # literal =? (?P<charset>[^?]*?) # non-greedy up to the next ? is the charset \? # literal ? (?P<encoding>[qb]) # either a "q" or a "b", case insensitive \? # literal ? (?P<encoded>.*?) # non-greedy up to the next ?= is the encoded string \?= # literal ?= (?=[ \t]|$) # whitespace or the end of the string s [\041-\176]+:$s \n[^ \t]+:c C sG t | � } t j | � s( | d f g Sg } d } x | j � D]�} t j | � so | j | d f � qA n t j | � } x�| r>| j d � j � } | r� | r� | d d d k r� | d d t | d f | d <q� | j | d f � n | r1g | d d !D] } | j � ^ q \ } } | d } d } | d k rXt j j | � } nm | d k r�t | � d } | r�| d d | 7} n y t j j | � } Wq�t j k r�t � q�Xn | d k r�| } n | r| d d | k r| d d | | d d f | d <q1| j | | f � n | d d 5q� WqA W| S( s� Decode a message header value without converting charset. Returns a list of (decoded_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. An email.errors.HeaderParseError may be raised when certain decoding error occurs (e.g. a base64 decoding exception). t i i����i i t qt bi s ===i N( t strt ecret searcht Nonet splitlinest appendt splitt popt stript SPACEt lowert emailt quoprimimet header_decodet lent base64mimet decodet binasciit ErrorR ( t headert decodedt dect linet partst unenct st charsett encodingt encodedt paderr( ( s$ /usr/lib64/python2.7/email/header.pyR = sJ #, 'c C sq t d | d | d | � } xO | D]G \ } } | d k rY t | t � rY t | � } n | j | | � q" W| S( s� Create 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. t maxlinelent header_namet continuation_wsN( R R t isinstanceR R ( t decoded_seqR' R( R) t hR" R# ( ( s$ /usr/lib64/python2.7/email/header.pyR y s c B s} e Z d d d d d d d � Z d � Z d � Z d � Z d � Z d d d � Z d � Z d � Z d � Z d d � Z RS( R t strictc C s� | d k r t } n t | t � s3 t | � } n | | _ | | _ t | j d t � � } g | _ | d k r� | j | | | � n | d k r� t } n | d k r� | | _ n | t | � d | _ | | | _ d S( s Create 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. The maximum line length can be specified explicit via maxlinelen. For splitting the first line to a shorter value (to account for the field header which isn't included in s, e.g. `Subject') pass in the name of the field in header_name. The default maxlinelen is 76. continuation_ws must be RFC 2822 compliant folding whitespace (usually either a space or a hard tab) which will be prepended to continuation lines. errors is passed through to the .append() call. s i N( R t USASCIIR* R t _charsett _continuation_wsR t replacet SPACE8t _chunksR t MAXLINELENt _firstlinelent _maxlinelen( t selfR" R# R' R( R) t errorst cws_expanded_len( ( s$ /usr/lib64/python2.7/email/header.pyt __init__� s c C s | j � S( s A synonym for self.encode().( t encode( R7 ( ( s$ /usr/lib64/python2.7/email/header.pyt __str__� s c C s� g } d } x� | j D]� \ } } | } | r~ | d k r_ | d k r{ | j t � d } q{ q~ | d k r~ | j t � q~ n | } | j t | t | � � � q Wt j | � S( s) Helper for the built-in unicode function.s us-asciiN( Ns us-ascii( Ns us-ascii( Ns us-ascii( R R3 R t USPACEt unicodeR t UEMPTYSTRINGt join( R7 t uchunkst lastcsR" R# t nextcs( ( s$ /usr/lib64/python2.7/email/header.pyt __unicode__� s c C s | | j � k S( N( R; ( R7 t other( ( s$ /usr/lib64/python2.7/email/header.pyt __eq__� s c C s | | k S( N( ( R7 RE ( ( s$ /usr/lib64/python2.7/email/header.pyt __ne__� s c C s | d k r | j } n t | t � s6 t | � } n | d k r� t | t � r� | j p] d } t | | | � } | j p~ d } | j | | � q� t | t � r� xT t | t f D]@ } y& | j p� d } | j | | � } PWq� t k r� q� Xq� Wq� n | j j | | f � d S( s> Append a string to the MIME header. Optional charset, if given, should be a Charset instance or the name of a character set (which will be converted to a Charset instance). A value of None (the default) means that the charset given in the constructor is used. s may be a byte string or a Unicode string. If it is a byte string (i.e. isinstance(s, str) is true), then charset is the encoding of that byte string, and a UnicodeError will be raised if the string cannot be decoded with that charset. If s is a Unicode string, then charset is a hint specifying the character set of the characters in the string. In this case, when producing an RFC 2822 compliant header using RFC 2047 rules, the Unicode string will be encoded using the following charsets in order: us-ascii, the charset hint, utf-8. The first character set not to provoke a UnicodeError is used. Optional `errors' is passed as the third argument to any unicode() or ustr.encode() call. t 8bits us-asciiN( R R/ R* R R t input_codecR> t output_codecR; R. t UTF8t UnicodeErrorR3 R ( R7 R" R# R8 t incodect ustrt outcodec( ( s$ /usr/lib64/python2.7/email/header.pyR � s( c C s0 | j | � } | j | t � } | j | � } | | k rI | | f g S| d k rb | | f g S| d k r� | j | | | | � S| t | � k r� | } | j | | t � } | j | | t � } n t | | | � \ } } | j | � } | j | t � } | | f g } | | j | | | j | � S( NRH s us-ascii( t to_splittablet from_splittablet Truet encoded_header_lent _split_asciiR t Falset _binsplitt _splitR6 ( R7 R" R# R' t splitcharst splittableR% t elent splitpntt firstt lastt fsplittablet fencodedt chunk( ( s$ /usr/lib64/python2.7/email/header.pyRW s$ c C s8 t | | | j | j | � } t | | g t | � � S( N( RT R6 R0 t zipR ( R7 R" R# t firstlenRX t chunks( ( s$ /usr/lib64/python2.7/email/header.pyRT N s c C s� g } x� | D]� \ } } | s% q n | d k s@ | j d k rI | } n | j | � } | rz | d j d � rz d } n d } t | | | | � q Wt | j } | j | � S( Ni����R R ( R t header_encodingt header_encodet endswitht _max_appendt NLR0 R@ ( R7 t newchunksR' Rc R R# R" t extrat joiner( ( s$ /usr/lib64/python2.7/email/header.pyt _encode_chunksS s s ;, c C s� g } | j } d } x~ | j D]s \ } } | | d } | | j d � k rW | } n | | j | | | | � 7} | d \ } } | j | � } q W| j | | � } t j | � r� t d j | � � � n | S( s� Encode a message header into an RFC-compliant format. There are many issues involved in converting a given string for use in an email header. Only certain character sets are readable in most email clients, and as header strings can only contain a subset of 7-bit ASCII, care must be taken to properly convert and encode (with Base64 or quoted-printable) header strings. In addition, there is a 75-character length limit on any given encoded header field, so line-wrapping must be performed, even with double-byte character sets. This method will do its best to convert the string to the correct character set used in email, and encode and line wrap it safely with the appropriate scheme for that character set. If the given charset is not known or an error occurs during conversion, this function will return the header untouched. Optional splitchars is a string containing characters to split long ASCII lines on, in rough support of RFC 2822's `highest level syntactic breaks'. This doesn't affect RFC 2047 encoded lines. i i R i����s8 header value appears to contain an embedded header: {!r}( R5 R3 RS RW Rl t _embeded_headerR R t format( R7 RX Ri R' t lastlenR" R# t targetlent lastchunkt lastcharsett value( ( s$ /usr/lib64/python2.7/email/header.pyR; v s N( t __name__t __module__R R: R< RD RF RG R RW RT Rl R; ( ( ( s$ /usr/lib64/python2.7/email/header.pyR � s 3 7 . #c C s| g } | } xi| j � D][} | j � } t | � | k rV | j | � | } q n x4 | D] } | | k r] Pq] q] W| j | � | } q t j d | � } | d k r� | } n d } | d } t | � } t | j d t � � } g } d } x]| j | � D]L} | t d t | � d � | } t | � } | } | d k r�| r�t | � d k r�t j | d � r�| j | � | | 7} q| | | k r:| r�| j | j | � | � n | | k r| d k rt | | | | d � } | j | d � | d g } n | g } | t | d � } | } q| j | � | | 7} qW| r | j | j | � � q q W| S( Ns %s\s*s ;,R R s i i i����( R t lstripR R t ret compileR1 R2 R t maxt fcret matchR@ RT t extend( R" Rb t restlenR) RX t linest maxlenR t cht cret eolRk t joinlent wslent thist linelent partt curlent partlent onfirstlinet subl( ( s$ /usr/lib64/python2.7/email/header.pyRT � s^ ! % c C s� d } t | � } xf | | k rz | | d d ?} | j | | t � } | j | � } | | k rm | } q | d } q W| j | | t � } | j | | t � } | | f S( Ni i ( R RQ RR RS RU ( RY R# R' t it jt mR` t chunklenR\ R] ( ( s$ /usr/lib64/python2.7/email/header.pyRV � s (" t __doc__t __all__Rw R t email.quoprimimeR t email.base64mimet email.errorsR t email.charsetR Rh R R= R2 R? R4 R. RK Rx t VERBOSEt IGNORECASEt MULTILINER Rz Rm R Rg R R R R RT RV ( ( ( s$ /usr/lib64/python2.7/email/header.pyt <module> s: < � F
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