def _to_stream_when_changed(self, out):
ctype = self.content_type
if ctype.is_singlepart():
if self._container.body_changed():
charset, encoding, body = encode_body(self)
if charset:
self.charset = charset
self.content_encoding = WithParams(encoding)
else:
body = self._container.read_body()
# RFC allows subparts without headers
if self.headers:
self.headers.to_stream(out)
elif self.is_root():
raise EncodingError("Root message should have headers")
out.write(CRLF)
out.write(body)
else:
self.headers.to_stream(out)
out.write(CRLF)
if ctype.is_multipart():
boundary = ctype.get_boundary_line()
for index, part in enumerate(self.parts):
out.write((CRLF if index != 0 else "") + boundary + CRLF)
part.to_stream(out)
out.write(CRLF + ctype.get_boundary_line(final=True) + CRLF)
elif ctype.is_message_container():
self.enclosed.to_stream(out)
def to_stream(self, stream):
"""Takes a stream and serializes headers
in a mime format"""
for h, v in self.v.iteritems():
try:
h = h.encode('ascii')
except UnicodeDecodeError:
raise EncodingError("Non-ascii header name")
stream.write("{0}: {1}\r\n".format(h, to_mime(h, v)))
def to_stream(self, stream, prepends_only=False):
"""
Takes a stream and serializes headers in a mime format.
"""
i = 0
for h, v in self.iteritems(raw=True):
if prepends_only and i == self.num_prepends:
break
i += 1
try:
h.encode('ascii')
except UnicodeDecodeError:
raise EncodingError("Non-ascii header name")
stream.write("{0}: {1}\r\n".format(h, to_mime(h, v)))