mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-27 02:24:18 +00:00
122 lines
4.3 KiB
Python
122 lines
4.3 KiB
Python
from __future__ import (absolute_import, print_function, division)
|
|
|
|
from netlib.http.http1 import HTTP1Protocol
|
|
from netlib.http.http2 import HTTP2Protocol
|
|
|
|
from ..protocol import (
|
|
RawTCPLayer, TlsLayer, Http1Layer, Http2Layer, is_tls_record_magic, ServerConnectionMixin
|
|
)
|
|
from .modes import HttpProxy, HttpUpstreamProxy, ReverseProxy
|
|
|
|
|
|
class RootContext(object):
|
|
"""
|
|
The outermost context provided to the root layer.
|
|
As a consequence, every layer has access to methods and attributes defined here.
|
|
|
|
Attributes:
|
|
client_conn:
|
|
The :py:class:`client connection <libmproxy.models.ClientConnection>`.
|
|
channel:
|
|
A :py:class:`~libmproxy.controller.Channel` to communicate with the FlowMaster.
|
|
Provides :py:meth:`.ask() <libmproxy.controller.Channel.ask>` and
|
|
:py:meth:`.tell() <libmproxy.controller.Channel.tell>` methods.
|
|
config:
|
|
The :py:class:`proxy server's configuration <libmproxy.proxy.ProxyConfig>`
|
|
"""
|
|
|
|
def __init__(self, client_conn, config, channel):
|
|
self.client_conn = client_conn
|
|
self.channel = channel
|
|
self.config = config
|
|
|
|
def next_layer(self, top_layer):
|
|
"""
|
|
This function determines the next layer in the protocol stack.
|
|
|
|
Arguments:
|
|
top_layer: the current innermost layer.
|
|
|
|
Returns:
|
|
The next layer
|
|
"""
|
|
|
|
# 1. Check for --ignore.
|
|
if self.config.check_ignore(top_layer.server_conn.address):
|
|
return RawTCPLayer(top_layer, logging=False)
|
|
|
|
d = top_layer.client_conn.rfile.peek(3)
|
|
client_tls = is_tls_record_magic(d)
|
|
|
|
# 2. Always insert a TLS layer, even if there's neither client nor server tls.
|
|
# An inline script may upgrade from http to https,
|
|
# in which case we need some form of TLS layer.
|
|
if isinstance(top_layer, ReverseProxy):
|
|
return TlsLayer(top_layer, client_tls, top_layer.server_tls)
|
|
if isinstance(top_layer, ServerConnectionMixin):
|
|
return TlsLayer(top_layer, client_tls, client_tls)
|
|
|
|
# 3. In Http Proxy mode and Upstream Proxy mode, the next layer is fixed.
|
|
if isinstance(top_layer, TlsLayer):
|
|
if isinstance(top_layer.ctx, HttpProxy):
|
|
return Http1Layer(top_layer, "regular")
|
|
if isinstance(top_layer.ctx, HttpUpstreamProxy):
|
|
return Http1Layer(top_layer, "upstream")
|
|
|
|
# 4. Check for other TLS cases (e.g. after CONNECT).
|
|
if client_tls:
|
|
return TlsLayer(top_layer, True, True)
|
|
|
|
# 4. Check for --tcp
|
|
if self.config.check_tcp(top_layer.server_conn.address):
|
|
return RawTCPLayer(top_layer)
|
|
|
|
# 5. Check for TLS ALPN (HTTP1/HTTP2)
|
|
if isinstance(top_layer, TlsLayer):
|
|
alpn = top_layer.client_conn.get_alpn_proto_negotiated()
|
|
if alpn == HTTP2Protocol.ALPN_PROTO_H2:
|
|
return Http2Layer(top_layer, 'transparent')
|
|
if alpn == HTTP1Protocol.ALPN_PROTO_HTTP1:
|
|
return Http1Layer(top_layer, 'transparent')
|
|
|
|
# 6. Assume HTTP1 by default
|
|
return Http1Layer(top_layer, 'transparent')
|
|
|
|
# In a future version, we want to implement TCP passthrough as the last fallback,
|
|
# but we don't have the UI part ready for that.
|
|
#
|
|
# d = top_layer.client_conn.rfile.peek(3)
|
|
# is_ascii = (
|
|
# len(d) == 3 and
|
|
# # better be safe here and don't expect uppercase...
|
|
# all(x in string.ascii_letters for x in d)
|
|
# )
|
|
# # TODO: This could block if there are not enough bytes available?
|
|
# d = top_layer.client_conn.rfile.peek(len(HTTP2Protocol.CLIENT_CONNECTION_PREFACE))
|
|
# is_http2_magic = (d == HTTP2Protocol.CLIENT_CONNECTION_PREFACE)
|
|
|
|
def log(self, msg, level, subs=()):
|
|
"""
|
|
Send a log message to the master.
|
|
"""
|
|
|
|
full_msg = [
|
|
"{}: {}".format(repr(self.client_conn.address), msg)
|
|
]
|
|
for i in subs:
|
|
full_msg.append(" -> " + i)
|
|
full_msg = "\n".join(full_msg)
|
|
self.channel.tell("log", Log(full_msg, level))
|
|
|
|
@property
|
|
def layers(self):
|
|
return []
|
|
|
|
def __repr__(self):
|
|
return "RootContext"
|
|
|
|
|
|
class Log(object):
|
|
def __init__(self, msg, level="info"):
|
|
self.msg = msg
|
|
self.level = level |