ETag and gzip decorators for Bottle.py

from functools import wraps

from gzip import compress

def gzipped():

    def decorator(func):

        @wraps(func)

        def wrapper(*args, **kwds):

            rsp_data = func(*args, **kwds)

            if 'gzip' in request.headers.get('Accept-Encoding', ''):

                response.headers['Content-Encoding'] = 'gzip'

                rsp_data = compress(rsp_data.encode('utf-8'))

            return rsp_data

        return wrapper

    return decorator

from base64 import b64encode

def etagged():

    def decorator(func):

        @wraps(func)

        def wrapper(*args, **kwds):

            rsp_data = func(*args, **kwds)

            etag = '"%s"' % b64encode(

                (hash(rsp_data.encode('utf-8')) + 2**63)

                .to_bytes(8, byteorder='big')).decode()[:11]

            if etag == request.headers.get('If-None-Match', '').lstrip('W/'):

                response.status = 304

                return ''

            response.headers['ETag'] = etag

            return rsp_data

        return wrapper

    return decorator