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import threading
import asyncio
import logging
from mitmproxy import addonmanager
from mitmproxy import options
from mitmproxy import controller
from mitmproxy import eventsequence
from mitmproxy import exceptions
from mitmproxy import command
from mitmproxy import http
from mitmproxy import websocket
from mitmproxy import log
from mitmproxy.net import server_spec
from mitmproxy.proxy.protocol import http_replay
from mitmproxy.coretypes import basethread
from . import ctx as mitmproxy_ctx
# Conclusively preventing cross-thread races on proxy shutdown turns out to be
# very hard. We could build a thread sync infrastructure for this, or we could
# wait until we ditch threads and move all the protocols into the async loop.
# Until then, silence non-critical errors.
logging.getLogger('asyncio').setLevel(logging.CRITICAL)
class ServerThread(basethread.BaseThread):
def __init__(self, server):
self.server = server
address = getattr(self.server, "address", None)
super().__init__(
"ServerThread ({})".format(repr(address))
)
def run(self):
self.server.serve_forever()
class Master:
"""
The master handles mitmproxy's main event loop.
"""
def __init__(self, opts):
self.should_exit = threading.Event()
self.channel = controller.Channel(
self,
asyncio.get_event_loop(),
self.should_exit,
)
self.options = opts or options.Options() # type: options.Options
self.commands = command.CommandManager(self)
self.addons = addonmanager.AddonManager(self)
self._server = None
self.first_tick = True
self.waiting_flows = []
self.log = log.Log(self)
mitmproxy_ctx.master = self
mitmproxy_ctx.log = self.log
mitmproxy_ctx.options = self.options
@property
def server(self):
return self._server
@server.setter
def server(self, server):
server.set_channel(self.channel)
self._server = server
def start(self):
self.should_exit.clear()
if self.server:
ServerThread(self.server).start()
async def tick(self):
if self.first_tick:
self.first_tick = False
self.addons.trigger("running")
while True:
if self.should_exit.is_set():
asyncio.get_event_loop().stop()
return
self.addons.trigger("tick")
await asyncio.sleep(0.1)
def run(self):
self.start()
asyncio.ensure_future(self.tick())
loop = asyncio.get_event_loop()
try:
loop.run_forever()
finally:
self.shutdown()
loop.close()
self.addons.trigger("done")
def shutdown(self):
if self.server:
self.server.shutdown()
self.should_exit.set()
def _change_reverse_host(self, f):
"""
When we load flows in reverse proxy mode, we adjust the target host to
the reverse proxy destination for all flows we load. This makes it very
easy to replay saved flows against a different host.
"""
if self.options.mode.startswith("reverse:"):
_, upstream_spec = server_spec.parse_with_mode(self.options.mode)
f.request.host, f.request.port = upstream_spec.address
f.request.scheme = upstream_spec.scheme
async def load_flow(self, f):
"""
Loads a flow and links websocket & handshake flows
"""
if isinstance(f, http.HTTPFlow):
self._change_reverse_host(f)
if 'websocket' in f.metadata:
self.waiting_flows.append(f)
if isinstance(f, websocket.WebSocketFlow):
hf = [hf for hf in self.waiting_flows if hf.id == f.metadata['websocket_handshake']][0]
f.handshake_flow = hf
self.waiting_flows.remove(hf)
self._change_reverse_host(f.handshake_flow)
f.reply = controller.DummyReply()
for e, o in eventsequence.iterate(f):
await self.addons.handle_lifecycle(e, o)
def replay_request(
self,
f: http.HTTPFlow,
block: bool=False
) -> http_replay.RequestReplayThread:
"""
Replay a HTTP request to receive a new response from the server.
Args:
f: The flow to replay.
block: If True, this function will wait for the replay to finish.
This causes a deadlock if activated in the main thread.
Returns:
The thread object doing the replay.
Raises:
exceptions.ReplayException, if the flow is in a state
where it is ineligible for replay.
"""
if f.live:
raise exceptions.ReplayException(
"Can't replay live flow."
)
if f.intercepted:
raise exceptions.ReplayException(
"Can't replay intercepted flow."
)
if not f.request:
raise exceptions.ReplayException(
"Can't replay flow with missing request."
)
if f.request.raw_content is None:
raise exceptions.ReplayException(
"Can't replay flow with missing content."
)
f.backup()
f.request.is_replay = True
f.response = None
f.error = None
if f.request.http_version == "HTTP/2.0": # https://github.com/mitmproxy/mitmproxy/issues/2197
f.request.http_version = "HTTP/1.1"
host = f.request.headers.pop(":authority")
f.request.headers.insert(0, "host", host)
rt = http_replay.RequestReplayThread(self.options, f, self.channel)
rt.start() # pragma: no cover
if block:
rt.join()
return rt
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