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__pycache__ dir drwxr-xr-x 2024-10-07 16:37 R D
mime dir drwxr-xr-x 2024-10-07 16:37 R D
  __init__.py 1.725 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  _encoded_words.py 8.318 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  _header_value_parser.py 97.508 KB -rw-r--r-- 2024-09-24 13:48 R E G D
  _parseaddr.py 17.191 KB -rw-r--r-- 2024-09-24 13:48 R E G D
  _policybase.py 14.72 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  architecture.rst 9.337 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  base64mime.py 3.475 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  charset.py 16.749 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  contentmanager.py 10.422 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  encoders.py 1.744 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  errors.py 3.562 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  feedparser.py 22.241 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  generator.py 19.507 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  header.py 23.537 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  headerregistry.py 19.753 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  iterators.py 2.085 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  message.py 45.624 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  parser.py 4.925 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  policy.py 10.13 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  quoprimime.py 9.627 KB -rw-r--r-- 2018-12-23 21:37 R E G D
  utils.py 13.571 KB -rw-r--r-- 2018-12-23 21:37 R E G D
REQUEST EXIT
# Copyright (C) 2001-2007 Python Software Foundation # Author: Barry Warsaw # Contact: email-sig@python.org """Basic message object for the email package object model.""" __all__ = ['Message', 'EmailMessage'] import re import uu import quopri from io import BytesIO, StringIO # Intrapackage imports from email import utils from email import errors from email._policybase import Policy, compat32 from email import charset as _charset from email._encoded_words import decode_b Charset = _charset.Charset SEMISPACE = '; ' # Regular expression that matches `special' characters in parameters, the # existence of which force quoting of the parameter value. tspecials = re.compile(r'[ \(\)<>@,;:\\"/\[\]\?=]') def _splitparam(param): # Split header parameters. BAW: this may be too simple. It isn't # strictly RFC 2045 (section 5.1) compliant, but it catches most headers # found in the wild. We may eventually need a full fledged parser. # RDM: we might have a Header here; for now just stringify it. a, sep, b = str(param).partition(';') if not sep: return a.strip(), None return a.strip(), b.strip() def _formatparam(param, value=None, quote=True): """Convenience function to format and return a key=value pair. This will quote the value if needed or if quote is true. If value is a three tuple (charset, language, value), it will be encoded according to RFC2231 rules. If it contains non-ascii characters it will likewise be encoded according to RFC2231 rules, using the utf-8 charset and a null language. """ if value is not None and len(value) > 0: # A tuple is used for RFC 2231 encoded parameter values where items # are (charset, language, value). charset is a string, not a Charset # instance. RFC 2231 encoded values are never quoted, per RFC. if isinstance(value, tuple): # Encode as per RFC 2231 param += '*' value = utils.encode_rfc2231(value[2], value[0], value[1]) return '%s=%s' % (param, value) else: try: value.encode('ascii') except UnicodeEncodeError: param += '*' value = utils.encode_rfc2231(value, 'utf-8', '') return '%s=%s' % (param, value) # BAW: Please check this. I think that if quote is set it should # force quoting even if not necessary. if quote or tspecials.search(value): return '%s="%s"' % (param, utils.quote(value)) else: return '%s=%s' % (param, value) else: return param def _parseparam(s): # RDM This might be a Header, so for now stringify it. s = ';' + str(s) plist = [] while s[:1] == ';': s = s[1:] end = s.find(';') while end > 0 and (s.count('"', 0, end) - s.count('\\"', 0, end)) % 2: end = s.find(';', end + 1) if end < 0: end = len(s) f = s[:end] if '=' in f: i = f.index('=') f = f[:i].strip().lower() + '=' + f[i+1:].strip() plist.append(f.strip()) s = s[end:] return plist def _unquotevalue(value): # This is different than utils.collapse_rfc2231_value() because it doesn't # try to convert the value to a unicode. Message.get_param() and # Message.get_params() are both currently defined to return the tuple in # the face of RFC 2231 parameters. if isinstance(value, tuple): return value[0], value[1], utils.unquote(value[2]) else: return utils.unquote(value) class Message: """Basic message object. A message object is defined as something that has a bunch of RFC 2822 headers and a payload. It may optionally have an envelope header (a.k.a. Unix-From or From_ header). If the message is a container (i.e. a multipart or a message/rfc822), then the payload is a list of Message objects, otherwise it is a string. Message objects implement part of the `mapping' interface, which assumes there is exactly one occurrence of the header per message. Some headers do in fact appear multiple times (e.g. Received) and for those headers, you must use the explicit API to set or get all the headers. Not all of the mapping methods are implemented. """ def __init__(self, policy=compat32): self.policy = policy self._headers = [] self._unixfrom = None self._payload = None self._charset = None # Defaults for multipart messages self.preamble = self.epilogue = None self.defects = [] # Default content type self._default_type = 'text/plain' def __str__(self): """Return the entire formatted message as a string. """ return self.as_string() def as_string(self, unixfrom=False, maxheaderlen=0, policy=None): """Return the entire formatted message as a string. Optional 'unixfrom', when true, means include the Unix From_ envelope header. For backward compatibility reasons, if maxheaderlen is not specified it defaults to 0, so you must override it explicitly if you want a different maxheaderlen. 'policy' is passed to the Generator instance used to serialize the mesasge; if it is not specified the policy associated with the message instance is used. If the message object contains binary data that is not encoded according to RFC standards, the non-compliant data will be replaced by unicode "unknown character" code points. """ from email.generator import Generator policy = self.policy if policy is None else policy fp = StringIO() g = Generator(fp, mangle_from_=False, maxheaderlen=maxheaderlen, policy=policy) g.flatten(self, unixfrom=unixfrom) return fp.getvalue() def __bytes__(self): """Return the entire formatted message as a bytes object. """ return self.as_bytes() def as_bytes(self, unixfrom=False, policy=None): """Return the entire formatted message as a bytes object. Optional 'unixfrom', when true, means include the Unix From_ envelope header. 'policy' is passed to the BytesGenerator instance used to serialize the message; if not specified the policy associated with the message instance is used. """ from email.generator import BytesGenerator policy = self.policy if policy is None else policy fp = BytesIO() g = BytesGenerator(fp, mangle_from_=False, policy=policy) g.flatten(self, unixfrom=unixfrom) return fp.getvalue() def is_multipart(self): """Return True if the message consists of multiple parts.""" return isinstance(self._payload, list) # # Unix From_ line # def set_unixfrom(self, unixfrom): self._unixfrom = unixfrom def get_unixfrom(self): return self._unixfrom # # Payload manipulation. # def attach(self, payload): """Add the given payload to the current payload. The current payload will always be a list of objects after this method is called. If you want to set the payload to a scalar object, use set_payload() instead. """ if self._payload is None: self._payload = [payload] else: try: self._payload.append(payload) except AttributeError: raise TypeError("Attach is not valid on a message with a" " non-multipart payload") def get_payload(self, i=None, decode=False): """Return a reference to the payload. The payload will either be a list object or a string. If you mutate the list object, you modify the message's payload in place. Optional i returns that index into the payload. Optional decode is a flag indicating whether the payload should be decoded or not, according to the Content-Transfer-Encoding header (default is False). When True and the message is not a multipart, the payload will be decoded if this header's value is `quoted-printable' or `base64'. If some other encoding is used, or the header is missing, or if the payload has bogus data (i.e. bogus base64 or uuencoded data), the payload is returned as-is. If the message is a multipart and the decode flag is True, then None is returned. """ # Here is the logic table for this code, based on the email5.0.0 code: # i decode is_multipart result # ------ ------ ------------ ------------------------------ # None True True None # i True True None # None False True _payload (a list) # i False True _payload element i (a Message) # i False False error (not a list) # i True False error (not a list) # None False False _payload # None True False _payload decoded (bytes) # Note that Barry planned to factor out the 'decode' case, but that # isn't so easy now that we handle the 8 bit data, which needs to be # converted in both the decode and non-decode path. if self.is_multipart(): if decode: return None if i is None: return self._payload else: return self._payload[i] # For backward compatibility, Use isinstance and this error message # instead of the more logical is_multipart test. if i is not None and not isinstance(self._payload, list): raise TypeError('Expected list, got %s' % type(self._payload)) payload = self._payload # cte might be a Header, so for now stringify it. cte = str(self.get('content-transfer-encoding', '')).lower() # payload may be bytes here. if isinstance(payload, str): if utils._has_surrogates(payload): bpayload = payload.encode('ascii', 'surrogateescape') if not decode: try: payload = bpayload.decode(self.get_param('charset', 'ascii'), 'replace') except LookupError: payload = bpayload.decode('ascii', 'replace') elif decode: try: bpayload = payload.encode('ascii') except UnicodeError: # This won't happen for RFC compliant messages (messages # containing only ASCII code points in the unicode input). # If it does happen, turn the string into bytes in a way # guaranteed not to fail. bpayload = payload.encode('raw-unicode-escape') if not decode: return payload if cte == 'quoted-printable': return quopri.decodestring(bpayload) elif cte == 'base64': # XXX: this is a bit of a hack; decode_b should probably be factored # out somewhere, but I haven't figured out where yet. value, defects = decode_b(b''.join(bpayload.splitlines())) for defect in defects: self.policy.handle_defect(self, defect) return value elif cte in ('x-uuencode', 'uuencode', 'uue', 'x-uue'): in_file = BytesIO(bpayload) out_file = BytesIO() try: uu.decode(in_file, out_file, quiet=True) return out_file.getvalue() except uu.Error: # Some decoding problem return bpayload if isinstance(payload, str): return bpayload return payload def set_payload(self, payload, charset=None): """Set the payload to the given value. Optional charset sets the message's default character set. See set_charset() for details. """ if hasattr(payload, 'encode'): if charset is None: self._payload = payload return if not isinstance(charset, Charset): charset = Charset(charset) payload = payload.encode(charset.output_charset) if hasattr(payload, 'decode'): self._payload = payload.decode('ascii', 'surrogateescape') else: self._payload = payload if charset is not None: self.set_charset(charset) def set_charset(self, charset): """Set the charset of the payload to a given character set. charset can be a Charset instance, a string naming a character set, or None. If it is a string it will be converted to a Charset instance. If charset is None, the charset parameter will be removed from the Content-Type field. Anything else will generate a TypeError. The message will be assumed to be of type text/* encoded with charset.input_charset. It will be converted to charset.output_charset and encoded properly, if needed, when generating the plain text representation of the message. MIME headers (MIME-Version, Content-Type, Content-Transfer-Encoding) will be added as needed. """ if charset is None: self.del_param('charset') self._charset = None return if not isinstance(charset, Charset): charset = Charset(charset) self._charset = charset if 'MIME-Version' not in self: self.add_header('MIME-Version', '1.0') if 'Content-Type' not in self: self.add_header('Content-Type', 'text/plain', charset=charset.get_output_charset()) else: self.set_param('charset', charset.get_output_charset()) if charset != charset.get_output_charset(): self._payload = charset.body_encode(self._payload) if 'Content-Transfer-Encoding' not in self: cte = charset.get_body_encoding() try: cte(self) except TypeError: # This 'if' is for backward compatibility, it allows unicode # through even though that won't work correctly if the # message is serialized. payload = self._payload if payload: try: payload = payload.encode('ascii', 'surrogateescape') except UnicodeError: payload = payload.encode(charset.output_charset) self._payload = charset.body_encode(payload) self.add_header('Content-Transfer-Encoding', cte) def get_charset(self): """Return the Charset instance associated with the message's payload. """ return self._charset # # MAPPING INTERFACE (partial) # def __len__(self): """Return the total number of headers, including duplicates.""" return len(self._headers) def __getitem__(self, name): """Get a header value. Return None if the header is missing instead of raising an exception. Note that if the header appeared multiple times, exactly which occurrence gets returned is undefined. Use get_all() to get all the values matching a header field name. """ return self.get(name) def __setitem__(self, name, val): """Set the value of a header. Note: this does not overwrite an existing header with the same field name. Use __delitem__() first to delete any existing headers. """ max_count = self.policy.header_max_count(name) if max_count: lname = name.lower() found = 0 for k, v in self._headers: if k.lower() == lname: found += 1 if found >= max_count: raise ValueError("There may be at most {} {} headers " "in a message".format(max_count, name)) self._headers.append(self.policy.header_store_parse(name, val)) def __delitem__(self, name): """Delete all occurrences of a header, if present. Does not raise an exception if the header is missing. """ name = name.lower() newheaders = [] for k, v in self._headers: if k.lower() != name: newheaders.append((k, v)) self._headers = newheaders def __contains__(self, name): return name.lower() in [k.lower() for k, v in self._headers] def __iter__(self): for field, value in self._headers: yield field def keys(self): """Return a list of all the message's header field names. These will be sorted in the order they appeared in the original message, or were added to the message, and may contain duplicates. Any fields deleted and re-inserted are always appended to the header list. """ return [k for k, v in self._headers] def values(self): """Return a list of all the message's header values. These will be sorted in the order they appeared in the original message, or were added to the message, and may contain duplicates. Any fields deleted and re-inserted are always appended to the header list. """ return [self.policy.header_fetch_parse(k, v) for k, v in self._headers] def items(self): """Get all the message's header fields and values. These will be sorted in the order they appeared in the original message, or were added to the message, and may contain duplicates. Any fields deleted and re-inserted are always appended to the header list. """ return [(k, self.policy.header_fetch_parse(k, v)) for k, v in self._headers] def get(self, name, failobj=None): """Get a header value. Like __getitem__() but return failobj instead of None when the field is missing. """ name = name.lower() for k, v in self._headers: if k.lower() == name: return self.policy.header_fetch_parse(k, v) return failobj # # "Internal" methods (public API, but only intended for use by a parser # or generator, not normal application code. # def set_raw(self, name, value): """Store name and value in the model without modification. This is an "internal" API, intended only for use by a parser. """ self._headers.append((name, value)) def raw_items(self): """Return the (name, value) header pairs without modification. This is an "internal" API, intended only for use by a generator. """ return