Python twisted TLS, get raw packets data

Question

Is it possible using a Python twisted web server to access the raw bytes of TLS Handshake packets for further processing, such as counting ja3 for client-hello?

I tried use call dataReceived method but its impossible by web server.

I think need redefine custom class for TLSMemoryBIOProtocol, but I can't call constructor for it.

class CustomTLSMemoryBIOProtocol(tls.TLSMemoryBIOProtocol):
    def __init__(self, factory, wrappedProtocol, _connectWrapped=True, client_hello = b""):
        super().__init__(factory, wrappedProtocol, _connectWrapped=True)
        self.client_hello = client_hello

    
    def dataReceived(self, bytes):
        if len(bytes) > 5 and bytes[:3] == b'\x16\x03\x01' and bytes[5] == 1:
            print("CustomTLSMemoryBIOProtocol dataReceived")
            self.client_hello = bytes
        super().dataReceived(bytes)

It's my current code:

def get_https_endpoint():
    ssl_context = ssl.DefaultOpenSSLContextFactory(
        "services/web/certs/key.pem", "services/web/certs/cert.pem"
    )
    https_factory = server.Site(IndexResource())

    return reactor.listenSSL(
        config["service"]["port"]["https"], https_factory, ssl_context
    )