_split(): New implementation of ASCII line splitting which should do a
better job and not be subject to the various weird artifacts (bugs)
reported. This should also do a better job of higher-level syntactic
splits by trying first to split on semis, then commas, then
whitespace.
Use a Timbot-ly binary search for optimal non-ASCII split points for
better packing of header lines. This also lets us remove one
recursion call. Don't pass in firstline, but instead pass in the
actual line length we're shooting for. Also pass in the list of split
characters.
encode(): Pass in the list of split characters so applications can
have some control over what "higher level syntactic breaks" are.
Also,
decode_header(): Transform binascii.Errors which can occur when
decoding a base64 RFC 2047 header with bogus data, into an
email.Errors.HeaderParseError. Closes SF bug #696712.
_handle_multipart(): Ensure that if the preamble exists but does not
end in a newline, a newline is still added. Without this, the
boundary separator will end up on the preamble line, breaking the MIME
structure.
_make_boundary(): Handle differences in the decimal point character
based on the locale.
Charset: Alias __repr__ to __str__ for debugging.
header_encode(): When calling quopriMIME.header_encode(), set
maxlinelen=None so that the lower level function doesn't (also) try to
wrap/fold the line.
_max_append(): Change the comparison so that the new string is
concatenated if it's less than or equal to the max length.
header_encode(): Allow for maxlinelen == None to mean, don't do any
line splitting. This is because this module is mostly used by higher
level abstractions (Header.py) which already ensures line lengths. We
do this in a cheapo way by setting the max_encoding to some insanely
<100k wink> large number.
because the test file, msg_26.txt which has \r\n line endings, was
getting munged by cvs, which knows to do line ending conversions for
text files. But we want \r\n to be preserved on all platforms, so we
cvs admin'd the file to be -kb (binary), which means we have to open
the file in binary mode to preserve these line ends. Hopefully this
will be the end of the thrashing on this issue (but probably not).
Test passes on *nix now, and Tim confirms it passes on Windows. We'll
leave it to Jack to test MacOS.
is passed straight through to the unicode() and ustr.encode() calls.
I think it's the best we can do to address the UnicodeErrors in badly
encoded headers such as is described in SF bug #648119.
file, needed because some binary distros (read RPMs) don't include the
test module in their standard Python package. This eliminates an
external dependency and closes SF bug # 650441.
binary distros (read RPMs) don't include the test module in their
standard Python package. This eliminates an external dependency and
closes SF bug # 650441.
where in lax parsing, the first non-header line after a header block
(e.g. the first line not containing a colon, and not a continuation),
can be treated as the first body line, even without the RFC mandated
blank line separator.
rfc822 had this behavior, and I vaguely remember problems with this,
but can't remember details. In any event, all the tests still pass,
so I guess we'll find out. ;/
This patch works by returning the non-header, non-continuation line
from _parseheader() and using that as the first header line prepended
to fp.read() if given. It's usually None.
We use this approach instead of trying to seek/tell the file-like
object.
multipart/digest isn't a message/rfc822. This is legal, but counter
to recommended practice in RFC 2046, $5.1.5.
The fix is to look at the content type after setting the default
content type. If the maintype is then message or multipart, attach
the parsed subobject, otherwise use set_payload() to set the data of
the other object.
Ben. If s is a byte string, make sure it can be converted to unicode
with the input codec, and from unicode with the output codec, or raise
a UnicodeError exception early. Skip this test (and the unicode->byte
string conversion) when the charset is our faux 8bit raw charset.
must be a Charset instance, not a string. The bug here was that
self._charset wasn't being converted to a Charset instance so later
.append() calls which used the default charset would break.
_split(): If the charset of the chunk is '8bit', return the chunk
unchanged. We can't safely split it, so this is the avenue of least
harm.
8-bit data, we cannot split it safely, so return the original string
unchanged.
_is8bitstring(): Helper function which returns True when we have a
byte string that contains non-ascii characters (i.e. mysterious 8-bit
data).
Also, it fixes a really egregious error in Header.encode() (really
in Header._encode_chunks()) that could cause a header to grow and
grow each time encode() was called if output_codec was different
from input_codec.
Also, fix a typo.
the change in revision 1.11 (test_email.py) in response to SF bug
#609988. We now think that was the wrong fix and that WinZip was the
real culprit there.
get_type(). Also, one of the regular expressions is constant so might
as well make it a module global. And, when splitting up digests,
handle lineseps that are longer than 1 character in length
(e.g. \r\n).
semantics of header chunks using byte and Unicode strings.
Specifically,
append(): When the given string is a byte string, charset (whether
specified explicitly in the argument list or implicitly via the
constructor default) is the encoding of the 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.
__init__(): Use the global USASCII Charset instance when the charset
argument is None. Also, clarification in the docstring.
Also, use True/False where appropriate.
Python 2.1.3. However it's required by the email tests suite, so poke
it into the encodings aliases if it's missing. The is apparently the
approved API for doing so.
Now we can remove the hexversion shortcircuits in the test suite.
encoding flag SHORTEST means to return the shortest encoding between
base64 and qp. This is used for the header_enc for utf-8. SHORTEST
isn't legal for body_enc.
Also some code cleanup:
- use True/False everywhere
- use == instead of `is' in a few places
- added _unicode() and make consistent the "is unicode" checks
- update docstrings
project, and with assistance from Oleg Broytmann. Specifically,
added some new tests to make sure we handle RFC 2231 encoded
parameters correctly. Two new data files were added which contain RFC
2231 encoded parameters.
project, and with assistance from Oleg Broytmann. Specifically,
get_param(), get_params(): Document that these methods may return
parameter values that are either strings, or 3-tuples in the case of
RFC 2231 encoded parameters. The application should be prepared to
deal with such return values.
get_boundary(): Be prepared to deal with RFC 2231 encoded boundary
parameters. It makes little sense to have boundaries that are
anything but ascii, so if we get back a 3-tuple from get_param() we
will decode it into ascii and let any failures percolate up.
get_content_charset(): New method which treats the charset parameter
just like the boundary parameter in get_boundary(). Note that
"get_charset()" was already taken to return the default Charset
object.
get_charsets(): Rewrite to use get_content_charset().
Move the imports of Parser and Message inside the
message_from_string() and message_from_file() functions. This way
just "import email" won't suck in most of the submodules of the
package.
Note: this will break code that relied on "import email" giving you a
bunch of the submodules, but that was never documented and should not
have been relied on.
_handle_text(): Use _isstring() for stringiness test.
_handle_multipart(): Add a test before the ListType test, checking for
stringiness of the payload. String payloads for multitypes means a
message with broken MIME chrome was parsed by a lax parser. Instead
of raising a BoundaryError in those cases, the entire body is assigned
to the message payload (but since the content type is still
multipart/*, the Generator needs to be updated too).
Broytmann in SF patch #600096. Specifically, the former function now
encodes the triplets, while the latter adds optional charset and
language arguments.
2045, section 5.2 states that if the Content-Type: header is
syntactically invalid, the default type should be text/plain.
Implement minimal sanity checking of the header -- it must have
exactly one slash in it. This closes SF patch #597593 by Skip, but in
a different way.
Note that these methods used to raise ValueError for invalid ctypes,
but now they won't.
Barry Warsaw
Tim Peters