How to use compression with Sanic responses and requests using gzip

compress_middleware.py

def compress_requests_and_responses(app):
    import gzip

    @app.middleware('response')
    async def compress_response(request, response):
        uncompressed_body_length = len(response.body)
        wants_gzip = 'gzip' in request.headers['Accept-Encoding']
        if (uncompressed_body_length > 0) and wants_gzip:
            compressed_body = gzip.compress(response.body)
            compressed_body_length = len(compressed_body)
            if compressed_body_length < uncompressed_body_length:
                response.body = compressed_body
                response.headers["Content-Encoding"] = "gzip"
                response.headers["Vary"] = "Accept-Encoding"
                response.headers["Content-Length"] = compressed_body_length

    @app.middleware('request')
    async def compress_request(request):
        if "Content-Encoding" in request.headers:
            if request.headers["Content-Encoding"] == "gzip":
                request.body = gzip.decompress(request.body)

Use like this:
from compress_middleware import compress_requests_and_responses
compress_requests_and_responses(app)