50行Python代码实现代理服务器
2018-07-20 来源:open-open
这里的代理服务器,是指二级代理服务器。比如:A可以访问B,B可以访问C,A不能直接访问C。这时,如果在B开一个二级代理,就可实现A访问C。现有的工具有CCProxy。
这里就是使用Python简单的实现一个二级代理。
#coding=utf-8 import socket import select import sys import threading import time import logging import os logsDir = "logs" if not os.path.isdir(logsDir): os.mkdir(logsDir) logging.basicConfig(level=logging.DEBUG, format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s', datefmt='%a, %d %b %Y %H:%M:%S', filename='logs/logs.log', filemode='a') #C的IP和端口 to_addr = ('0.0.0.0', 8087) class Proxy: def __init__(self, addr): self.proxy = socket.socket(socket.AF_INET, socket.SOCK_STREAM) self.proxy.bind(addr) self.proxy.listen(10) self.inputs = [self.proxy] self.route = {} def serve_forever(self): logging.info('proxy listen...') while 1: readable, _, _ = select.select(self.inputs, [], []) for self.sock in readable: if self.sock == self.proxy: self.on_join() else: try: data = self.sock.recv(8192) except Exception, e: logging.error(str(e)) self.on_quit() continue if not data: self.on_quit() else: try: self.route[self.sock].send(data) except Exception, e: logging.error(str(e)) self.on_quit() continue def on_join(self): client, addr = self.proxy.accept() logging.info("proxy client " + str(addr) + 'connect') forward = socket.socket(socket.AF_INET, socket.SOCK_STREAM) forward.connect(to_addr) self.inputs += [client, forward] self.route[client] = forward self.route[forward] = client #删除连接 def on_quit(self): ls = [self.sock] if self.sock in self.route: ls.append(self.route[self.sock]) for s in ls: if s in self.inputs: self.inputs.remove(s) if s in self.route: del self.route[s] s.close() if __name__ == "__main__": try: Proxy(('', 8192)).serve_forever() except KeyboardInterrupt: logging.error("KeyboardInterrupt") return
来自:http://blog.csdn.net/junfeng_feng/article/details/42966363
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