使tinyHttpPoxy支持二級代理

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使tinyHttpPoxy支持二級代理

分类： Python 2011-04-09 09:02 211人阅读 评论(1) 收藏 举报

tinyHttpPoxy是一個簡單的Http代理程式，但是有一個不足的地方是
不支持二級代理，改寫了一下，最主要是增加
self.headers['Proxy-Authorization'] = 'Basic bGs6MjAwMg=='

#!/bin/sh -
"exec" "python" "-O" "$0" "$@"

__doc__ = """Tiny HTTP Proxy.

This module implements GET, HEAD, POST, PUT and DELETE methods
on BaseHTTPServer, and behaves as an HTTP proxy. The CONNECT
method is also implemented experimentally, but has not been
tested yet.

Any help will be greatly appreciated. SUZUKI Hisao
"""

__version__ = "0.2.1"

import BaseHTTPServer, select, socket, SocketServer, urlparse
import base64

class ProxyHandler (BaseHTTPServer.BaseHTTPRequestHandler):
__base = BaseHTTPServer.BaseHTTPRequestHandler
__base_handle = __base.handle

server_version = "TinyHTTPProxy/" + __version__
rbufsize = 0 # self.rfile Be unbuffered

def handle(self):
(ip, port) = self.client_address
if hasattr(self, 'allowed_clients') and ip not in self.allowed_clients:
self.raw_requestline = self.rfile.readline()
if self.parse_request(): self.send_error(403)
else:
self.__base_handle()

def _connect_to(self, netloc, soc):
i = netloc.find(':')
if i >= 0:
host_port = netloc[:i], int(netloc[i+1:])
else:
host_port = netloc, 80
print "/t" "connect to %s:%d" % host_port
soc.settimeout(5)
try: soc.connect(host_port)
except socket.error, arg:
#try: msg = arg[1]
#except: msg = arg
#self.send_error(404, msg)
self.send_error(404, 'url timeout')
return 0
return 1

def do_CONNECT(self):
soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
try:
if self._connect_to(self.path, soc):
self.log_request(200)
self.wfile.write(self.protocol_version +
" 200 Connection established/r/n")
self.wfile.write("Proxy-agent: %s/r/n" % self.version_string())
self.wfile.write("/r/n")
self._read_write(soc, 300)
finally:
print "/t" "bye"
soc.close()
self.connection.close()

def do_GET(self):
(scm, netloc, path, params, query, fragment) = urlparse.urlparse(
self.path, 'http')
print "cmd:", self.raw_requestline
#print 'self.path = ', self.path
#print 'Values: ', (scm, netloc, path, params, query, fragment)
if scm != 'http' or fragment or not netloc:
self.send_error(400, "bad url %s" % self.path)
return
soc = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
fid = None
try:
#if self._connect_to(netloc, soc):
if self._connect_to('172.17.5.53:80', soc):
self.log_request()
getStr = "%s %s %s/r/n" % (
self.command,
urlparse.urlunparse((scm, netloc, path, params, query, '')),
self.request_version)
print "A:", scm, netloc, path,params,query
soc.send(getStr)
print "getStr: ", getStr
###
self.headers['Proxy-Authorization'] = 'Basic bGs6MjAwMg=='
self.headers['Connection'] = 'close'
del self.headers['Proxy-Connection']
for key_val in self.headers.items():
s = "%s: %s/r/n" % key_val
print "s:", s
soc.send(s)
soc.send("/r/n")
if path == '/mt':
f = '.'+path+'/'+query
if f != '/mt/':
print "f:", f
fid = open(f,'wb+')
self._read_write(soc,cache=fid)
finally:
#print "/t" "bye"
soc.close()
if fid: fid.close()
self.connection.close()

def _read_write(self, soc, max_idling=20,cache=None):
''' todo: need more checking to make sure not garbage downloaded
more checking to avoid download duplicate
'''
iw = [self.connection, soc]
ow = []
header_pos = -1; # data pos for end of http header
header_buffer = ''
count = 0
#print "count = ", count
while 1:
count += 1
#print "count = ", count
(ins, _, exs) = select.select(iw, ow, iw, 3)
if exs:
#print "break"
break
if ins:
for i in ins:
if i is soc:
out = self.connection
data = i.recv(81920)
#print "OK: ", data
else:
out = soc
data = i.recv(81920)
print "OK: ", data
#print "OK: ", data
#data = data.decode('big5').encode('utf-8')
#print data
if data:
out.send(data)
if cache:
if header_pos == -1:
header_buffer += data
header_pos = header_buffer.find('/r/n/r/n')
if header_pos == -1:
header_buffer = header_buffer[-3:]
else:
data = header_buffer[header_pos+4:]
if header_pos != -1:
cache.write(data)

count = 0
else:
print "/t" "idle", count
if count == max_idling:
print "max_idling", max_idling
break

do_HEAD = do_GET
do_POST = do_GET
do_PUT = do_GET
do_DELETE=do_GET

class ThreadingHTTPServer (SocketServer.ThreadingMixIn,
BaseHTTPServer.HTTPServer): pass

if __name__ == '__main__':
from sys import argv
if argv[1:] and argv[1] in ('-h', '--help'):
print argv[0], "[port [allowed_client_name ...]]"
else:
if argv[2:]:
allowed = []
for name in argv[2:]:
client = socket.gethostbyname(name)
allowed.append(client)
print "Accept: %s (%s)" % (client, name)
ProxyHandler.allowed_clients = allowed
del argv[2:]
else:
print "Any clients will be served..."
BaseHTTPServer.test(ProxyHandler, ThreadingHTTPServer)

 

 

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