http.py 文件源码

def __init__(self, filename, mimetype=None, chunksize=DEFAULT_CHUNK_SIZE,
               resumable=False):
    """Constructor.

    Args:
      filename: string, Name of the file.
      mimetype: string, Mime-type of the file. If None then a mime-type will be
        guessed from the file extension.
      chunksize: int, File will be uploaded in chunks of this many bytes. Only
        used if resumable=True. Pass in a value of -1 if the file is to be
        uploaded in a single chunk. Note that Google App Engine has a 5MB limit
        on request size, so you should never set your chunksize larger than 5MB,
        or to -1.
      resumable: bool, True if this is a resumable upload. False means upload
        in a single request.
    """
    self._filename = filename
    fd = open(self._filename, 'rb')
    if mimetype is None:
      # No mimetype provided, make a guess.
      mimetype, _ = mimetypes.guess_type(filename)
      if mimetype is None:
        # Guess failed, use octet-stream.
        mimetype = 'application/octet-stream'
    super(MediaFileUpload, self).__init__(fd, mimetype, chunksize=chunksize,
                                          resumable=resumable)