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import codecs
import six
from flanker.mime.message.utils import to_unicode
_ALIASES = {
'sjis': 'shift_jis',
'windows-874': 'cp874',
'koi8-r': 'koi8_r'
}
def convert_to_unicode(charset, value):
if isinstance(value, six.text_type):
return value
charset = _ensure_charset(charset)
value = to_unicode(value, charset)
return value
def _ensure_charset(charset):
charset = charset.lower()
try:
codecs.lookup(charset)
return charset
except LookupError:
pass
charset = _ALIASES.get(charset)
if charset:
return charset
return 'utf-8'
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