"""
In mitmproxy, protocols are implemented as a set of layers, which are composed on top each other.
The first layer is usually the proxy mode, e.g. transparent proxy or normal HTTP proxy. Next,
various protocol layers are stacked on top of each other - imagine WebSockets on top of an HTTP
Upgrade request. An actual mitmproxy connection may look as follows (outermost layer first):

    Transparent HTTP proxy, no TLS:
      - TransparentProxy
      - Http1Layer
      - HttpLayer

    Regular proxy, CONNECT request with WebSockets over SSL:
      - ReverseProxy
      - Http1Layer
      - HttpLayer
      - TLSLayer
      - WebsocketLayer (or TCPLayer)

Every layer acts as a read-only context for its inner layers (see :py:class:`Layer`). To communicate
with an outer layer, a layer can use functions provided in the context. The next layer is always
determined by a call to :py:meth:`.next_layer() <libmproxy.proxy.RootContext.next_layer>`,
which is provided by the root context.

Another subtle design goal of this architecture is that upstream connections should be established
as late as possible; this makes server replay without any outgoing connections possible.
"""

from __future__ import (absolute_import, print_function, division)
from .base import Layer, ServerConnectionMixin, Kill
from .http import Http1Layer, UpstreamConnectLayer, Http2Layer
from .tls import TlsLayer, is_tls_record_magic
from .rawtcp import RawTCPLayer

__all__ = [
    "Layer", "ServerConnectionMixin", "Kill",
    "Http1Layer", "UpstreamConnectLayer", "Http2Layer",
    "TlsLayer", "is_tls_record_magic",
    "RawTCPLayer"
]