一个几百行代码做出http/https代理服务器的脚本，启动即可做http https透明代理使用
python proxy.py 8992
使用非阻塞io模式，性能还可以。
可以和浏览器一样保持长连接，代码有点乱，不管那么多了能跑就行
几百行代码做出http/https代理服务器代码片段
*1. * [代码] [Python]代码
#!/usr/bin/python
#-*- coding:utf-8 -*-
import socket, logging
import select, errno
import os
import sys
import traceback
import gzip
from StringIO import StringIO
import Queue
import threading
import time
import thread
import cgi
from cgi import parse_qs
import json
import imp
from os.path import join, getsize
import re
import ssl
##################user config ##################
logger = logging.getLogger("network-server")
#############################################
def getTraceStackMsg():
tb = sys.exc_info()[2]
msg = ''
for i in traceback.format_tb(tb):
msg += i
return msg
def InitLog():
logger.setLevel(logging.DEBUG)
fh = logging.FileHandler("network-server.log")
fh.setLevel(logging.DEBUG)
ch = logging.StreamHandler()
ch.setLevel(logging.ERROR)
formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
ch.setFormatter(formatter)
fh.setFormatter(formatter)
logger.addHandler(fh)
logger.addHandler(ch)
def clearfdpro(epoll_fd, params, fd):
try:
fd_check = int(fd)
except Exception, e:
print "fd error"
sys.exit(1)
try:
#print "pid:%s, close fd:%s" % (os.getpid(), fd)
epoll_fd.unregister(fd)
except Exception, e:
#print str(e)+getTraceStackMsg()
pass
try:
param = params[fd]
try:
addr = param["addr"]
if "next" in param:
print "close sock, %s:%s" % (addr[0], addr[1])
except Exception, e:
pass
param["connections"].shutdown(socket.SHUT_RDWR)
param["connections"].close()
f = param.get("f", None)
if f != None:
f.close()
rc = param.get("rc", None)
if rc != None:
rc.close()
if "read_cache_name" in param:
os.remove(param["read_cache_name"])
except Exception, e:
#print str(e)+getTraceStackMsg()
pass
try:
del params[fd]
#logger.error(getTraceStackMsg())
#logger.error("clear fd:%s" % fd)
except Exception, e:
#print str(e)+getTraceStackMsg()
pass
def clearfd(epoll_fd, params, fd):
try:
param = params[fd]
if "nextfd" in param:
nextfd = param["nextfd"]
next_param = params[nextfd]
del param["nextfd"]
del next_param["nextfd"]
if not "next" in param: #masterfd
clearfdpro(epoll_fd, params, nextfd)
else: # nextfd
if not "writedata" in next_param or len(next_param["writedata"]) == 0:
clearfdpro(epoll_fd, params, nextfd)
else:
next_param["sendandclose"] = "true"
clearfdpro(epoll_fd, params, fd)
except Exception, e:
#print str(e)+getTraceStackMsg()
pass
def FindHostPort(datas):
host_s = -1
host_e = -1
host_str = None
host = ""
port = ""
if not datas.startswith("CONNECT"):
host_s = datas.find("Host:")
if host_s < 0:
host_s = datas.find("host:")
if host_s > 0:
host_e = datas.find("\r\n", host_s)
if host_s > 0 and host_e > 0:
host_str = datas[host_s+5:host_e].strip()
add_list = host_str.split(":")
if len(add_list) == 2:
host = add_list[0]
port = add_list[1]
else:
host = add_list[0]
port = 80
first_seg = datas.find("\r\n")
first_line = datas[0:first_seg]
first_line = first_line.replace(" http://%s" % host_str, " ")
datas = first_line + datas[first_seg:]
else:
first_seg = datas.find("\r\n")
head_e = datas.find("\r\n\r\n")
if first_seg > 0 and head_e > 0:
first_line = datas[0:first_seg]
36a0
com,host_str,http_version = re.split('\s+', first_line)
add_list = host_str.split(":")
if len(add_list) == 2:
host = add_list[0]
port = add_list[1]
else:
host = add_list[0]
port = 443
host_s = 1
host_e = 1
return host_str,host_s,host_e,host,port,datas
def connect_pro(params, param, epoll_fd, datas, fd, cur_time, host, port):
try:
nextfd = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
nextfd.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
nextfd.settimeout(5)
try:
nextfd.connect((host, int(port)))
except Exception, e:
print "########%s,%s connect fail" % (host,port)
nextfd.setblocking(0)
next_fileno = nextfd.fileno()
print "pid:%s, connect %s:%s fd:%s" % (os.getpid(), host, port, next_fileno)
if next_fileno in params:
print "fileno exist"
sys.exit(1)
if not datas.startswith("CONNECT"):
next_param = {"addr":[host,port],"writelen":0, "connections":nextfd, "time":cur_time, "nextfd":fd}
param["nextfd"] = next_fileno
next_param["writedata"] = datas
next_param["writelen"] = 0
next_param["next"] = "true"
param["read_len"] = 0
param["readdata"] = ""
params[next_fileno] = next_param
epoll_fd.register(next_fileno, select.EPOLLIN | select.EPOLLOUT | select.EPOLLERR | select.EPOLLHUP)
epoll_fd.modify(fd, select.EPOLLIN | select.EPOLLERR | select.EPOLLHUP)
else:
next_param = {"addr":[host,port],"writelen":0, "connections":nextfd, "time":cur_time, "nextfd":fd}
param["nextfd"] = next_fileno
next_param["next"] = "true"
params[next_fileno] = next_param
epoll_fd.register(next_fileno, select.EPOLLIN | select.EPOLLERR | select.EPOLLHUP)
param["read_len"] = 0
param["readdata"] = ""
param["writedata"] = "HTTP/1.1 200 Connection Established\r\nConnection: close\r\n\r\n"
param["writelen"] = 0
param["reuse"] = "true"
epoll_fd.modify(fd, select.EPOLLIN | select.EPOLLOUT | select.EPOLLERR | select.EPOLLHUP)
except socket.error, msg:
clearfd(epoll_fd,params,fd)
def process_datas(process_status, params, param, epoll_fd, datas, read_len, fd, cur_time):
if process_status == "close":
clearfd(epoll_fd,params,fd)
else:
need_connect = False
host_str = None
host_s = -1
host_e = -1
if "reuse" in param and "next" not in param:
if not datas.startswith("CONNECT") and \
not datas.startswith("GET") and \
not datas.startswith("POST") and \
not datas.startswith("PUT"):
del param["reuse"]
else:
host_str,host_s,host_e,host,port,datas = FindHostPort(datas)
host_s = int(host_s)
host_e = int(host_e)
next_fileno = param["nextfd"]
next_param = params[next_fileno]
addr = next_param["addr"]
if host_s > 0 and host_e > 0:
if host != addr[0] or str(port) != str(addr[1]):
print "%s,%s neq %s,%s" % (host,port,addr[0],addr[1])
need_connect = True
del param["nextfd"]
del next_param["nextfd"]
clearfd(epoll_fd,params,next_fileno)
del param["reuse"]
else:
param["read_len"] = read_len
param["readdata"] = datas
return None
if need_connect or not "nextfd" in param:
if host_str == None or not host_s > 0 or not host_e > 0:
host_str,host_s,host_e,host,port,datas = FindHostPort(datas)
host_s = int(host_s)
host_e = int(host_e)
if host_s > 0 and host_e > 0:
if not datas.startswith("CONNECT"):
epoll_fd.modify(fd, select.EPOLLERR | select.EPOLLHUP) # 简单处理，http连接时把读去掉，避免内存攻击
thread.start_new_thread(connect_pro,(params, param, epoll_fd, datas, fd, cur_time, host, port))
else:
param["read_len"] = read_len
param["readdata"] = datas
else:
next_fileno = param["nextfd"]
next_param = params[next_fileno]
if "next" in param:
next_param["reuse"] = "true"
write_data = next_param.get("writedata", "")
write_data += datas
next_param["writedata"] = write_data
param["read_len"] = 0
param["readdata"] = ""
epoll_fd.modify(next_fileno, select.EPOLLIN | select.EPOLLOUT | select.EPOLLERR | select.EPOLLHUP)
if process_status == "close_after_process":
print "close after process"
clearfd(epoll_fd,params,fd)
def run_main(listen_fd):
try:
epoll_fd = select.epoll()
epoll_fd.register(listen_fd.fileno(), select.EPOLLIN | select.EPOLLERR | select.EPOLLHUP)
print "listen_fd:%s" % listen_fd.fileno()
except select.error, msg:
logger.error(msg)
params = {}
last_min_time = -1
while True:
epoll_list = epoll_fd.poll()
cur_time = time.time()
for fd, events in epoll_list:
if fd == listen_fd.fileno():
while True:
try:
conn, addr = listen_fd.accept()
conn.setblocking(0)
epoll_fd.register(conn.fileno(), select.EPOLLIN | select.EPOLLERR | select.EPOLLHUP)
conn.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
#conn.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, True)
params[conn.fileno()] = {"addr":addr,"writelen":0, "connections":conn, "time":cur_time}
except socket.error, msg:
break
elif select.EPOLLIN & events:
param = params.get(fd,None)
if param == None:
continue
param["time"] = cur_time
datas = param.get("readdata","")
cur_sock = params[fd]["connections"]
read_len = param.get("read_len", 0)
process_status = "close"
while True:
try:
data = cur_sock.recv(102400)
if not data:
if datas == "":
break
else:
raise Exception("close after process")
else:
datas += data
read_len += len(data)
except socket.error, msg:
if msg.errno == errno.EAGAIN:
process_status = "process"
break
else:
break
except Exception, e:
process_status = "close_after_process"
break
process_datas(process_status, params, param, epoll_fd, datas, read_len, fd, cur_time)
elif select.EPOLLHUP & events or select.EPOLLERR & events:
clearfd(epoll_fd,params,fd)
logger.error("sock: %s error" % fd)
elif select.EPOLLOUT & events:
param = params.get(fd,None)
if param == None:
continue
param["time"] = cur_time
sendLen = param.get("writelen",0)
writedata = param.get("writedata", "")
total_write_len = len(writedata)
cur_sock = param["connections"]
f = param.get("f", None)
totalsenlen = param.get("totalsenlen", None)
if writedata == "":
clearfd(epoll_fd,params,fd)
continue
while True:
try:
sendLen += cur_sock.send(writedata[sendLen:])
if sendLen == total_write_len:
if f != None and totalsenlen != None:
readmorelen = 102400
if readmorelen > totalsenlen:
readmorelen = totalsenlen
morefiledata = ""
if readmorelen > 0:
morefiledata = f.read(readmorelen)
if morefiledata != "":
writedata = morefiledata
sendLen = 0
total_write_len = len(writedata)
totalsenlen -= total_write_len
param["writedata"] = writedata
param["totalsenlen"] = totalsenlen
continue
else:
f.close()
del param["f"]
del param["totalsenlen"]
if not "sendandclose" in param:
param["writedata"] = ""
param["writelen"] = 0
epoll_fd.modify(fd, select.EPOLLIN | select.EPOLLERR | select.EPOLLHUP)
else:
clearfd(epoll_fd,params,fd)
break
except socket.error, msg:
if msg.errno == errno.EAGAIN:
param["writelen"] = sendLen
break
clearfd(epoll_fd,params,fd)
break
else:
continue
#check time out
if cur_time - last_min_time > 20:
last_min_time = cur_time
objs = params.items()
for (key_fd,value) in objs:
fd_time = value.get("time", 0)
del_time = cur_time - fd_time
if del_time > 20:
clearfd(epoll_fd,params,key_fd)
elif fd_time < last_min_time:
last_min_time = fd_time
if __name__ == "__main__":
reload(sys)
sys.setdefaultencoding('utf8')
InitLog()
port = int(sys.argv[1])
try:
listen_fd = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
except socket.error, msg:
logger.error("create socket failed")
try:
listen_fd.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
except socket.error, msg:
logger.error("setsocketopt SO_REUSEADDR failed")
try:
listen_fd.bind(('', port))
except socket.error, msg:
logger.error("bind failed")
try:
listen_fd.listen(10240)
listen_fd.setblocking(0)
except socket.error, msg:
logger.error(msg)
child_num = 19
c = 0
while c < child_num:
c = c + 1
newpid = os.fork()
if newpid == 0:
run_main(listen_fd)
run_main(listen_fd) 
