gallery.py 文件源码

def thumbs(request, crop=True):
    """
    Return an image/jpeg image that's a thumbnail of the encoded request.
    """
    encoded = request.match_info['encoded']

    cached_thumb = os.path.join(args.cache, encoded)
    if not os.path.isfile(cached_thumb):
        try:
            __, w_x_h, path = decode(CIPHER_KEY, encoded).split(':', 3)
        except (binascii.Error, UnicodeDecodeError, ValueError):
            return web.HTTPNotFound()

        # WISHLIST add as extra context to the aiohttp.access logger
        logger.info('Decoded as %s %s', path, w_x_h)
        abspath = args.STORAGE_DIR + path
        try:
            im = Image.open(abspath)
        except (FileNotFoundError, IsADirectoryError):
            return web.HTTPNotFound()

        thumb_dimension = [int(x) for x in w_x_h.split('x')]
        with open(cached_thumb, 'wb') as fh:
            if crop:
                cropped_im = crop_1(im)
                cropped_im.thumbnail(thumb_dimension)
                cropped_im.save(fh, 'jpeg')
            else:
                im.thumbnail(thumb_dimension)
                im.save(fh, 'jpeg')

    with open(cached_thumb, 'rb') as fh:
        return web.Response(
            status=200, body=fh.read(), content_type='image/jpeg',
            headers={
                'Cache-Control': 'max-age=86400',
            })