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import threading
from netlib.http import HttpError
from netlib.http.http1 import HTTP1Protocol
from netlib.tcp import NetLibError
from ..controller import Channel
from ..protocol import KILL, Error
from ..protocol.http_wrappers import HTTPResponse
from ..proxy import Log, Kill
from ..proxy.connection import ServerConnection
from .http import make_connect_request
class RequestReplayThread(threading.Thread):
name = "RequestReplayThread"
def __init__(self, config, flow, masterq, should_exit):
"""
masterqueue can be a queue or None, if no scripthooks should be
processed.
"""
self.config, self.flow = config, flow
if masterq:
self.channel = Channel(masterq, should_exit)
else:
self.channel = None
super(RequestReplayThread, self).__init__()
def run(self):
r = self.flow.request
form_out_backup = r.form_out
try:
self.flow.response = None
# If we have a channel, run script hooks.
if self.channel:
request_reply = self.channel.ask("request", self.flow)
if request_reply is None or request_reply == KILL:
raise Kill()
elif isinstance(request_reply, HTTPResponse):
self.flow.response = request_reply
if not self.flow.response:
# In all modes, we directly connect to the server displayed
if self.config.mode == "upstream":
server_address = self.config.upstream_server.address
server = ServerConnection(server_address)
server.connect()
protocol = HTTP1Protocol(server)
if r.scheme == "https":
connect_request = make_connect_request((r.host, r.port))
server.send(protocol.assemble(connect_request))
resp = protocol.read_response("CONNECT")
if resp.code != 200:
raise HttpError(502, "Upstream server refuses CONNECT request")
server.establish_ssl(
self.config.clientcerts,
sni=self.flow.server_conn.sni
)
r.form_out = "relative"
else:
r.form_out = "absolute"
else:
server_address = (r.host, r.port)
server = ServerConnection(server_address)
server.connect()
protocol = HTTP1Protocol(server)
if r.scheme == "https":
server.establish_ssl(
self.config.clientcerts,
sni=self.flow.server_conn.sni
)
r.form_out = "relative"
server.send(protocol.assemble(r))
self.flow.server_conn = server
self.flow.response = HTTPResponse.from_protocol(
protocol,
r.method,
body_size_limit=self.config.body_size_limit,
)
if self.channel:
response_reply = self.channel.ask("response", self.flow)
if response_reply is None or response_reply == KILL:
raise Kill()
except (HttpError, NetLibError) as v:
self.flow.error = Error(repr(v))
if self.channel:
self.channel.ask("error", self.flow)
except Kill:
# KillSignal should only be raised if there's a channel in the
# first place.
self.channel.tell("log", Log("Connection killed", "info"))
finally:
r.form_out = form_out_backup
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