datastructures.py 文件源码

def __init__(self, stream=None, filename=None, name=None,
                 content_type=None, content_length=None,
                 headers=None):
        self.name = name
        self.stream = stream or _empty_stream

        # if no filename is provided we can attempt to get the filename
        # from the stream object passed.  There we have to be careful to
        # skip things like <fdopen>, <stderr> etc.  Python marks these
        # special filenames with angular brackets.
        if filename is None:
            filename = getattr(stream, 'name', None)
            s = make_literal_wrapper(filename)
            if filename and filename[0] == s('<') and filename[-1] == s('>'):
                filename = None

            # On Python 3 we want to make sure the filename is always unicode.
            # This might not be if the name attribute is bytes due to the
            # file being opened from the bytes API.
            if not PY2 and isinstance(filename, bytes):
                filename = filename.decode(get_filesystem_encoding(),
                                           'replace')

        self.filename = filename
        if headers is None:
            headers = Headers()
        self.headers = headers
        if content_type is not None:
            headers['Content-Type'] = content_type
        if content_length is not None:
            headers['Content-Length'] = str(content_length)