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from __future__ import (absolute_import, print_function, division)
import traceback
import sys
import socket
from netlib import tcp
from netlib.http.http1 import HTTP1Protocol
from netlib.tcp import NetLibError
from ..exceptions import ProtocolException, ServerException
from ..protocol import Kill
from ..models import ClientConnection, make_error_response
from .modes import HttpUpstreamProxy, HttpProxy, ReverseProxy, TransparentProxy, Socks5Proxy
from .root_context import RootContext, Log
class DummyServer:
bound = False
def __init__(self, config):
self.config = config
def start_slave(self, *args):
pass
def shutdown(self):
pass
class ProxyServer(tcp.TCPServer):
allow_reuse_address = True
bound = True
def __init__(self, config):
"""
Raises ProxyServerError if there's a startup problem.
"""
self.config = config
try:
super(ProxyServer, self).__init__((config.host, config.port))
except socket.error as e:
raise ServerException('Error starting proxy server: ' + repr(e), e)
self.channel = None
def start_slave(self, klass, channel):
slave = klass(channel, self)
slave.start()
def set_channel(self, channel):
self.channel = channel
def handle_client_connection(self, conn, client_address):
h = ConnectionHandler(
conn,
client_address,
self.config,
self.channel
)
h.handle()
class ConnectionHandler(object):
def __init__(self, client_conn, client_address, config, channel):
self.config = config
"""@type: libmproxy.proxy.config.ProxyConfig"""
self.client_conn = ClientConnection(
client_conn,
client_address,
None)
"""@type: libmproxy.proxy.connection.ClientConnection"""
self.channel = channel
"""@type: libmproxy.controller.Channel"""
def _create_root_layer(self):
root_context = RootContext(
self.client_conn,
self.config,
self.channel
)
mode = self.config.mode
if mode == "upstream":
return HttpUpstreamProxy(
root_context,
self.config.upstream_server.address
)
elif mode == "transparent":
return TransparentProxy(root_context)
elif mode == "reverse":
server_tls = self.config.upstream_server.scheme == "https"
return ReverseProxy(
root_context,
self.config.upstream_server.address,
server_tls
)
elif mode == "socks5":
return Socks5Proxy(root_context)
elif mode == "regular":
return HttpProxy(root_context)
elif callable(mode): # pragma: nocover
return mode(root_context)
else: # pragma: nocover
raise ValueError("Unknown proxy mode: %s" % mode)
def handle(self):
self.log("clientconnect", "info")
root_layer = self._create_root_layer()
root_layer = self.channel.ask("clientconnect", root_layer)
if root_layer == Kill:
def root_layer():
raise Kill()
try:
root_layer()
except Kill:
self.log("Connection killed", "info")
except ProtocolException as e:
self.log(e, "info")
# If an error propagates to the topmost level,
# we send an HTTP error response, which is both
# understandable by HTTP clients and humans.
try:
error_response = make_error_response(502, repr(e))
self.client_conn.send(HTTP1Protocol().assemble(error_response))
except NetLibError:
pass
except Exception:
self.log(traceback.format_exc(), "error")
print(traceback.format_exc(), file=sys.stderr)
print("mitmproxy has crashed!", file=sys.stderr)
print("Please lodge a bug report at: https://github.com/mitmproxy/mitmproxy", file=sys.stderr)
self.log("clientdisconnect", "info")
self.channel.tell("clientdisconnect", root_layer)
self.client_conn.finish()
def log(self, msg, level):
msg = "{}: {}".format(repr(self.client_conn.address), msg)
self.channel.tell("log", Log(msg, level))
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