text.py 文件源码

def decode_text(message):
        """Extracts the text of the message and try to convert it to utf-8. This method
        do not checks if the message is multipart or if the message mime type is plain
        text or html. Maybe you want to use the methods :class:`Text.text` and
        :class:`Text.html`.

        Parameters
        ----------
        message: email.message.Message
            Message to extract its text.

        Returns
        -------
        content: str
            Text of the message encoded to utf-8. If it cannot encode the text to utf-8
            the text will be returned as ascii.

        Raises
        ------
        TypeError
            If the parameter is not an instance of :class:`email.message.Message`.
        """
        def utf8(text):
            try:
                charset = message.get_content_charset()
                if charset:
                    return text.decode(charset).encode('utf-8')
            except LookupError:
                return text
            except (UnicodeDecodeError, UnicodeEncodeError):
                return text
            return text
        try:
            return utf8(Text.decode_content(message))
        except (UnicodeDecodeError, UnicodeEncodeError):
            return message.get_payload().encode('ascii')