mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-23 16:17:49 +00:00
144 lines
4.0 KiB
Python
144 lines
4.0 KiB
Python
# Copyright (C) 2010 Aldo Cortesi
|
|
#
|
|
# This program is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
import Queue, threading
|
|
|
|
should_exit = False
|
|
|
|
|
|
class DummyReply:
|
|
"""
|
|
A reply object that does nothing. Useful when we need an object to seem
|
|
like it has a channel, and during testing.
|
|
"""
|
|
def __init__(self):
|
|
self.acked = False
|
|
|
|
def __call__(self, msg=False):
|
|
self.acked = True
|
|
|
|
|
|
class Reply:
|
|
"""
|
|
Messages sent through a channel are decorated with a "reply" attribute.
|
|
This object is used to respond to the message through the return
|
|
channel.
|
|
"""
|
|
def __init__(self, obj):
|
|
self.obj = obj
|
|
self.q = Queue.Queue()
|
|
self.acked = False
|
|
|
|
def __call__(self, msg=None):
|
|
if not self.acked:
|
|
self.acked = True
|
|
if msg is None:
|
|
self.q.put(self.obj)
|
|
else:
|
|
self.q.put(msg)
|
|
|
|
|
|
class Channel:
|
|
def __init__(self, q):
|
|
self.q = q
|
|
|
|
def ask(self, m):
|
|
"""
|
|
Decorate a message with a reply attribute, and send it to the
|
|
master. then wait for a response.
|
|
"""
|
|
m.reply = Reply(m)
|
|
self.q.put(m)
|
|
while not should_exit:
|
|
try:
|
|
# The timeout is here so we can handle a should_exit event.
|
|
g = m.reply.q.get(timeout=0.5)
|
|
except Queue.Empty: # pragma: nocover
|
|
continue
|
|
return g
|
|
|
|
def tell(self, m):
|
|
"""
|
|
Decorate a message with a dummy reply attribute, send it to the
|
|
master, then return immediately.
|
|
"""
|
|
m.reply = DummyReply()
|
|
self.q.put(m)
|
|
|
|
|
|
class Slave(threading.Thread):
|
|
"""
|
|
Slaves get a channel end-point through which they can send messages to
|
|
the master.
|
|
"""
|
|
def __init__(self, channel, server):
|
|
self.channel, self.server = channel, server
|
|
self.server.set_channel(channel)
|
|
threading.Thread.__init__(self)
|
|
|
|
def run(self):
|
|
self.server.serve_forever()
|
|
|
|
|
|
class Master:
|
|
"""
|
|
Masters get and respond to messages from slaves.
|
|
"""
|
|
def __init__(self, server):
|
|
"""
|
|
server may be None if no server is needed.
|
|
"""
|
|
self.server = server
|
|
self.masterq = Queue.Queue()
|
|
|
|
def tick(self, q):
|
|
changed = False
|
|
try:
|
|
# This endless loop runs until the 'Queue.Empty'
|
|
# exception is thrown. If more than one request is in
|
|
# the queue, this speeds up every request by 0.1 seconds,
|
|
# because get_input(..) function is not blocking.
|
|
while True:
|
|
# Small timeout to prevent pegging the CPU
|
|
msg = q.get(timeout=0.01)
|
|
self.handle(msg)
|
|
changed = True
|
|
except Queue.Empty:
|
|
pass
|
|
return changed
|
|
|
|
def run(self):
|
|
global should_exit
|
|
should_exit = False
|
|
self.server.start_slave(Slave, Channel(self.masterq))
|
|
while not should_exit:
|
|
self.tick(self.masterq)
|
|
self.shutdown()
|
|
|
|
def handle(self, msg):
|
|
c = "handle_" + msg.__class__.__name__.lower()
|
|
m = getattr(self, c, None)
|
|
if m:
|
|
m(msg)
|
|
else:
|
|
msg.reply()
|
|
|
|
def shutdown(self):
|
|
global should_exit
|
|
if not should_exit:
|
|
should_exit = True
|
|
if self.server:
|
|
self.server.shutdown()
|