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proxy.py
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#!/usr/bin/env python
# encoding: utf-8
__author__ = 'zhanghe'
import os
import sys
import socket
from urlparse import urlparse
import tornado.httpserver
import tornado.ioloop
import tornado.iostream
import tornado.web
import tornado.httpclient
import logging
logging.basicConfig(
level=logging.DEBUG,
format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s',
datefmt='%Y-%m-%d %H:%M:%S',
# 屏幕输出
# stream=sys.stderr,
# 写入文件
filename='tornado_proxy.log',
filemode='w',
)
logger = logging.getLogger('tornado_proxy')
__all__ = ['ProxyHandler', 'run_proxy']
def get_proxy(url):
"""
获取系统代理
"""
url_parsed = urlparse(url, scheme='http')
proxy_key = '%s_proxy' % url_parsed.scheme
logger.debug('proxy_key: %s' % proxy_key)
logger.debug('os.environ.get(proxy_key):%s' % os.environ.get(proxy_key))
return os.environ.get(proxy_key)
def parse_proxy(proxy):
"""
解析代理
"""
proxy_parsed = urlparse(proxy, scheme='http')
logger.debug('proxy_parsed.hostname:%s, proxy_parsed.port:%s\n' % (proxy_parsed.hostname, proxy_parsed.port))
return proxy_parsed.hostname, proxy_parsed.port
def fetch_request(url, callback, **kwargs):
"""
获取请求
:param url:
:param callback:
:param kwargs:
:return:
"""
proxy = get_proxy(url)
if proxy:
logger.debug('Forward request via upstream proxy %s' % proxy)
tornado.httpclient.AsyncHTTPClient.configure(
'tornado.curl_httpclient.CurlAsyncHTTPClient')
host, port = parse_proxy(proxy)
kwargs['proxy_host'] = host
kwargs['proxy_port'] = port
req = tornado.httpclient.HTTPRequest(url, **kwargs)
client = tornado.httpclient.AsyncHTTPClient()
client.fetch(req, callback)
class ProxyHandler(tornado.web.RequestHandler):
"""
代理请求处理类
"""
SUPPORTED_METHODS = ['GET', 'POST', 'CONNECT']
@tornado.web.asynchronous
def get(self):
logger.debug('remote_ip:%s' % self.request.remote_ip) # 请求来源ip（优先获取header头部伪造的代理ip）
logger.debug('Handle %s request to %s' % (self.request.method, self.request.uri))
def handle_response(response):
if (response.error and not
isinstance(response.error, tornado.httpclient.HTTPError)):
self.set_status(500)
self.write('Internal server error:\n' + str(response.error))
else:
self.set_status(response.code)
logger.debug('response.headers:%s' % response.headers)
for header in ('Date', 'Cache-Control', 'Server', 'Content-Type', 'Location'):
v = response.headers.get(header)
if v:
self.set_header(header, v)
v = response.headers.get_list('Set-Cookie')
if v:
for i in v:
self.add_header('Set-Cookie', i)
if response.body:
self.write(response.body)
self.finish()
body = self.request.body
if not body:
body = None
try:
fetch_request(
self.request.uri, handle_response,
method=self.request.method, body=body,
headers=self.request.headers, follow_redirects=False,
allow_nonstandard_methods=True)
except tornado.httpclient.HTTPError as e:
if hasattr(e, 'response') and e.response:
handle_response(e.response)
else:
self.set_status(500)
self.write('Internal server error:\n' + str(e))
self.finish()
@tornado.web.asynchronous
def post(self):
return self.get()
@tornado.web.asynchronous
def connect(self):
logger.debug('Start CONNECT to %s' % self.request.uri)
host, port = self.request.uri.split(':')
client = self.request.connection.stream
def read_from_client(data):
upstream.write(data)
def read_from_upstream(data):
client.write(data)
def client_close(data=None):
if upstream.closed():
return
if data:
upstream.write(data)
upstream.close()
def upstream_close(data=None):
if client.closed():
return
if data:
client.write(data)
client.close()
def start_tunnel():
"""
开启隧道连接
"""
logger.debug('CONNECT tunnel established to %s' % self.request.uri)
client.read_until_close(client_close, read_from_client)
upstream.read_until_close(upstream_close, read_from_upstream)
client.write(b'HTTP/1.0 200 Connection established\r\n\r\n')
def on_proxy_response(data=None):
if data:
first_line = data.splitlines()[0]
http_v, status, text = first_line.split(None, 2)
if int(status) == 200:
logger.debug('Connected to upstream proxy %s' % proxy)
start_tunnel()
return
self.set_status(500)
self.finish()
def start_proxy_tunnel():
"""
开启代理隧道连接
"""
upstream.write('CONNECT %s HTTP/1.1\r\n' % self.request.uri)
upstream.write('Host: %s\r\n' % self.request.uri)
upstream.write('Proxy-Connection: Keep-Alive\r\n\r\n')
upstream.read_until('\r\n\r\n', on_proxy_response)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM, 0)
# 改变源端口
s.bind((config.bind_ip, 0))
upstream = tornado.iostream.IOStream(s)
proxy = get_proxy(self.request.uri)
logger.debug('proxy: %s' % proxy)
if proxy:
proxy_host, proxy_port = parse_proxy(proxy)
logger.debug('proxy_host, proxy_port: %s\t%s' % (proxy_host, proxy_port))
upstream.connect((proxy_host, proxy_port), start_proxy_tunnel)
else:
upstream.connect((host, int(port)), start_tunnel)
def run_proxy(port, start_ioloop=True):
"""
Run proxy on the specified port. If start_ioloop is True (default),
the tornado IOLoop will be started immediately.
"""
app = tornado.web.Application([
(r'.*', ProxyHandler),
])
app.listen(port)
ioloop = tornado.ioloop.IOLoop.instance()
if start_ioloop:
ioloop.start()
def get_local_ip_list():
"""
获取本地ip地址
"""
cmd = "LC_ALL=C ifconfig | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1}'"
# result = os.system(cmd)
result = os.popen(cmd).read()
ip_list = result.strip().split('\n')
return ip_list
def check_ip(ipaddr):
"""
校验IP地址正确性
:param ipaddr:
:return:
"""
addr = ipaddr.strip().split('.') # 切割IP地址为一个列表
if len(addr) != 4: # 切割后列表必须有4个参数
return False
for ip in addr:
if ip < 0 or ip > 255:
return False
return True
def check_local_ip(ip):
"""
检测是否为本地ip
:param ip:
:return:
"""
ip_list = get_local_ip_list()
if ip in ip_list:
return True
else:
return False
def usage():
print '程序示例：\n'
print 'python proxy.py 8888 192.168.1.106\n'
if __name__ == '__main__':
port = 8888
import config
if len(sys.argv) > 2:
port = int(sys.argv[1])
config.bind_ip = str(sys.argv[2])
if check_local_ip(config.bind_ip) is False:
print '[%s]不是本地IP地址' % config.bind_ip
print '可用IP为：\n%s' % get_local_ip_list()
sys.exit(1)
else:
usage()
sys.exit(1)
print ("Starting HTTP proxy on port %d" % port)
try:
run_proxy(port)
except KeyboardInterrupt:
sys.exit(1)