def _flatten(message):
r"""Flatten a message to bytes.
>>> from pgp_mime.email import encodedMIMEText
>>> message = encodedMIMEText('Hi\nBye')
>>> _flatten(message) # doctest: +ELLIPSIS
b'Content-Type: text/plain; charset="us-ascii"\r\nMIME-Version: ...'
"""
bytesio = _io.BytesIO()
generator = _BytesGenerator(bytesio, policy=_email_policy.SMTP)
generator.flatten(message)
return bytesio.getvalue()
def _flatten(message):
r"""Flatten an email.message.Message to bytes
>>> import rss2email.config
>>> config = rss2email.config.Config()
>>> config.read_dict(rss2email.config.CONFIG)
Here's a 7-bit, base64 version:
>>> message = get_message(
... sender='John <*****@*****.**>', recipient='Ζεύς <*****@*****.**>',
... subject='Homage',
... body="You're great, Ζεύς!\n",
... content_type='plain',
... config=config)
>>> for line in _flatten(message).split(b'\n'):
... print(line) # doctest: +REPORT_UDIFF
b'MIME-Version: 1.0'
b'Content-Type: text/plain; charset="utf-8"'
b'Content-Transfer-Encoding: base64'
b'From: John <*****@*****.**>'
b'To: =?utf-8?b?zpbOtc+Nz4I=?= <*****@*****.**>'
b'Subject: Homage'
b''
b'WW91J3JlIGdyZWF0LCDOls61z43PgiEK'
b''
Here's an 8-bit version:
>>> config.set('DEFAULT', 'use-8bit', str(True))
>>> message = get_message(
... sender='John <*****@*****.**>', recipient='Ζεύς <*****@*****.**>',
... subject='Homage',
... body="You're great, Ζεύς!\n",
... content_type='plain',
... config=config)
>>> for line in _flatten(message).split(b'\n'):
... print(line) # doctest: +REPORT_UDIFF
b'MIME-Version: 1.0'
b'Content-Type: text/plain; charset="utf-8"'
b'From: John <*****@*****.**>'
b'To: =?utf-8?b?zpbOtc+Nz4I=?= <*****@*****.**>'
b'Subject: Homage'
b'Content-Transfer-Encoding: 8bit'
b''
b"You're great, \xce\x96\xce\xb5\xcf\x8d\xcf\x82!"
b''
Here's an 8-bit version in UTF-16:
>>> config.set('DEFAULT', 'encodings', 'US-ASCII, UTF-16-LE')
>>> message = get_message(
... sender='John <*****@*****.**>', recipient='Ζεύς <*****@*****.**>',
... subject='Homage',
... body="You're great, Ζεύς!\n",
... content_type='plain',
... config=config)
>>> for line in _flatten(message).split(b'\n'):
... print(line) # doctest: +REPORT_UDIFF
b'MIME-Version: 1.0'
b'Content-Type: text/plain; charset="utf-16-le"'
b'From: John <*****@*****.**>'
b'To: =?utf-8?b?zpbOtc+Nz4I=?= <*****@*****.**>'
b'Subject: Homage'
b'Content-Transfer-Encoding: 8bit'
b''
b"\x00Y\x00o\x00u\x00'\x00r\x00e\x00 \x00g\x00r\x00e\x00a\x00t\x00,\x00 \x00\x96\x03\xb5\x03\xcd\x03\xc2\x03!\x00\n\x00"
"""
bytesio = _io.BytesIO()
generator = _BytesGenerator(bytesio) # use policies for Python >=3.3
try:
generator.flatten(message)
except UnicodeEncodeError as e:
# HACK: work around deficiencies in BytesGenerator
_LOG.warning(e)
b = message.as_string().encode(str(message.get_charset()))
m = _email.message_from_bytes(b)
if not m:
raise
h = {k:_decode_header(v) for k,v in m.items()}
head = {k:_decode_header(v) for k,v in message.items()}
body = str(m.get_payload(decode=True), str(m.get_charsets()[0]))
if (h == head and body == message.get_payload()):
return b
raise
else:
return bytesio.getvalue()
def _flatten(message):
r"""Flatten an email.message.Message to bytes
>>> import rss2email.config
>>> config = rss2email.config.Config()
>>> config.read_dict(rss2email.config.CONFIG)
Here's a 7-bit, base64 version:
>>> message = get_message(
... sender='John <*****@*****.**>', recipient='Ζεύς <*****@*****.**>',
... subject='Homage',
... body="You're great, Ζεύς!\n",
... content_type='plain',
... config=config)
>>> for line in _flatten(message).split(b'\n'):
... print(line) # doctest: +REPORT_UDIFF
b'MIME-Version: 1.0'
b'Content-Type: text/plain; charset="utf-8"'
b'Content-Transfer-Encoding: base64'
b'From: John <*****@*****.**>'
b'To: =?utf-8?b?zpbOtc+Nz4I=?= <*****@*****.**>'
b'Subject: Homage'
b''
b'WW91J3JlIGdyZWF0LCDOls61z43PgiEK'
b''
Here's an 8-bit version:
>>> config.set('DEFAULT', 'use-8bit', str(True))
>>> message = get_message(
... sender='John <*****@*****.**>', recipient='Ζεύς <*****@*****.**>',
... subject='Homage',
... body="You're great, Ζεύς!\n",
... content_type='plain',
... config=config)
>>> for line in _flatten(message).split(b'\n'):
... print(line) # doctest: +REPORT_UDIFF
b'MIME-Version: 1.0'
b'Content-Type: text/plain; charset="utf-8"'
b'From: John <*****@*****.**>'
b'To: =?utf-8?b?zpbOtc+Nz4I=?= <*****@*****.**>'
b'Subject: Homage'
b'Content-Transfer-Encoding: 8bit'
b''
b"You're great, \xce\x96\xce\xb5\xcf\x8d\xcf\x82!"
b''
Here's an 8-bit version in UTF-16:
>>> config.set('DEFAULT', 'encodings', 'US-ASCII, UTF-16-LE')
>>> message = get_message(
... sender='John <*****@*****.**>', recipient='Ζεύς <*****@*****.**>',
... subject='Homage',
... body="You're great, Ζεύς!\n",
... content_type='plain',
... config=config)
>>> for line in _flatten(message).split(b'\n'):
... print(line) # doctest: +REPORT_UDIFF
b'MIME-Version: 1.0'
b'Content-Type: text/plain; charset="utf-16-le"'
b'From: John <*****@*****.**>'
b'To: =?utf-8?b?zpbOtc+Nz4I=?= <*****@*****.**>'
b'Subject: Homage'
b'Content-Transfer-Encoding: 8bit'
b''
b"\x00Y\x00o\x00u\x00'\x00r\x00e\x00 \x00g\x00r\x00e\x00a\x00t\x00,\x00 \x00\x96\x03\xb5\x03\xcd\x03\xc2\x03!\x00\n\x00"
"""
bytesio = _io.BytesIO()
# TODO: use policies argument instead of policy set in `message`
# see https://docs.python.org/3.5/library/email.generator.html?highlight=bytesgenerator#email.generator.BytesGenerator
generator = _BytesGenerator(bytesio)
try:
generator.flatten(message)
except UnicodeEncodeError as e:
# HACK: work around deficiencies in BytesGenerator
_LOG.warning(e)
b = message.as_string().encode(str(message.get_charset()))
m = _email.message_from_bytes(b)
if not m:
raise
h = {k: _decode_header(v) for k, v in m.items()}
head = {k: _decode_header(v) for k, v in message.items()}
body = str(m.get_payload(decode=True), str(m.get_charsets()[0]))
if (h == head and body == message.get_payload()):
return b
raise
else:
return bytesio.getvalue()