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This function is equivalent to base64.decodestring and it's retained only for backward compatibility. It used to remove the last \\n of the decoded string, if it had any (see issue 7143). """ if not s: return s return base64.decodestring(s) def fix_eols(s): """Replace all line-ending characters with \\r\\n.""" # Fix newlines with no preceding carriage return s = re.sub(r'(?', name) return '%s%s%s <%s>' % (quotes, name, quotes, address) return address def getaddresses(fieldvalues): """Return a list of (REALNAME, EMAIL) for each fieldvalue.""" all = COMMASPACE.join(fieldvalues) a = _AddressList(all) return a.addresslist ecre = re.compile(r''' =\? # literal =? (?P[^?]*?) # non-greedy up to the next ? is the charset \? # literal ? (?P[qb]) # either a "q" or a "b", case insensitive \? # literal ? (?P.*?) # non-greedy up to the next ?= is the atom \?= # literal ?= ''', re.VERBOSE | re.IGNORECASE) def formatdate(timeval=None, localtime=False, usegmt=False): """Returns a date string as specified by RFC 2822, e.g.: Fri, 09 Nov 2001 01:08:47 -0000 Optional timeval if given is a floating point time value as accepted by gmtime() and localtime(), otherwise the current time is used. Optional localtime is a flag that when True, interprets timeval, and returns a date relative to the local timezone instead of UTC, properly taking daylight savings time into account. Optional argument usegmt means that the timezone is written out as an ascii string, not numeric one (so "GMT" instead of "+0000"). This is needed for HTTP, and is only used when localtime==False. """ # Note: we cannot use strftime() because that honors the locale and RFC # 2822 requires that day and month names be the English abbreviations. if timeval is None: timeval = time.time() if localtime: now = time.localtime(timeval) # Calculate timezone offset, based on whether the local zone has # daylight savings time, and whether DST is in effect. if time.daylight and now[-1]: offset = time.altzone else: offset = time.timezone hours, minutes = divmod(abs(offset), 3600) # Remember offset is in seconds west of UTC, but the timezone is in # minutes east of UTC, so the signs differ. if offset > 0: sign = '-' else: sign = '+' zone = '%s%02d%02d' % (sign, hours, minutes // 60) else: now = time.gmtime(timeval) # Timezone offset is always -0000 if usegmt: zone = 'GMT' else: zone = '-0000' return '%s, %02d %s %04d %02d:%02d:%02d %s' % ( ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'][now[6]], now[2], ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'][now[1] - 1], now[0], now[3], now[4], now[5], zone) def make_msgid(idstring=None): """Returns a string suitable for RFC 2822 compliant Message-ID, e.g: <142480216486.20800.16526388040877946887@nightshade.la.mastaler.com> Optional idstring if given is a string used to strengthen the uniqueness of the message id. """ timeval = int(time.time()*100) pid = os.getpid() randint = random.getrandbits(64) if idstring is None: idstring = '' else: idstring = '.' + idstring idhost = socket.getfqdn() msgid = '<%d.%d.%d%s@%s>' % (timeval, pid, randint, idstring, idhost) return msgid # These functions are in the standalone mimelib version only because they've # subsequently been fixed in the latest Python versions. We use this to worm # around broken older Pythons. def parsedate(data): if not data: return None return _parsedate(data) def parsedate_tz(data): if not data: return None return _parsedate_tz(data) def parseaddr(addr): """ Parse addr into its constituent realname and email address parts. Return a tuple of realname and email address, unless the parse fails, in which case return a 2-tuple of ('', ''). """ addrs = _AddressList(addr).addresslist if not addrs: return '', '' return addrs[0] # rfc822.unquote() doesn't properly de-backslash-ify in Python pre-2.3. def unquote(str): """Remove quotes from a string.""" if len(str) > 1: if str.startswith('"') and str.endswith('"'): return str[1:-1].replace('\\\\', '\\').replace('\\"', '"') if str.startswith('<') and str.endswith('>'): return str[1:-1] return str # RFC2231-related functions - parameter encoding and decoding def decode_rfc2231(s): """Decode string according to RFC 2231""" parts = s.split(TICK, 2) if len(parts) <= 2: return None, None, s return parts def encode_rfc2231(s, charset=None, language=None): """Encode string according to RFC 2231. If neither charset nor language is given, then s is returned as-is. If charset is given but not language, the string is encoded using the empty string for language. """ import urllib s = urllib.quote(s, safe='') if charset is None and language is None: return s if language is None: language = '' return "%s'%s'%s" % (charset, language, s) rfc2231_continuation = re.compile(r'^(?P\w+)\*((?P[0-9]+)\*?)?$') def decode_params(params): """Decode parameters list according to RFC 2231. params is a sequence of 2-tuples containing (param name, string value). """ # Copy params so we don't mess with the original params = params[:] new_params = [] # Map parameter's name to a list of continuations. The values are a # 3-tuple of the continuation number, the string value, and a flag # specifying whether a particular segment is %-encoded. rfc2231_params = {} name, value = params.pop(0) new_params.append((name, value)) while params: name, value = params.pop(0) if name.endswith('*'): encoded = True else: encoded = False value = unquote(value) mo = rfc2231_continuation.match(name) if mo: name, num = mo.group('name', 'num') if num is not None: num = int(num) rfc2231_params.setdefault(name, []).append((num, value, encoded)) else: new_params.append((name, '"%s"' % quote(value))) if rfc2231_params: for name, continuations in rfc2231_params.items(): value = [] extended = False # Sort by number continuations.sort() # And now append all values in numerical order, converting # %-encodings for the encoded segments. If any of the # continuation names ends in a *, then the entire string, after # decoding segments and concatenating, must have the charset and # language specifiers at the beginning of the string. for num, s, encoded in continuations: if encoded: s = urllib.unquote(s) extended = True value.append(s) value = quote(EMPTYSTRING.join(value)) if extended: charset, language, value = decode_rfc2231(value) new_params.append((name, (charset, language, '"%s"' % value))) else: new_params.append((name, '"%s"' % value)) return new_params def collapse_rfc2231_value(value, errors='replace', fallback_charset='us-ascii'): if isinstance(value, tuple): rawval = unquote(value[2]) charset = value[0] or 'us-ascii' try: return unicode(rawval, charset, errors) except LookupError: # XXX charset is unknown to Python. return unicode(rawval, fallback_charset, errors) else: return unquote(value)