【更新】python寫的sogou代理全網加速器，特別適合於教育網（稍改動）

源代碼出處：http://xiaoxia.org/2011/11/14/update-sogou-proxy-program-with-https-support/

給力的小蝦後來又更新了，解決了https問題，實在是膜拜啊…

有人藉此用C語言寫了一個運行於Windows下的小exe，也非常厲害！地址：

http://hi.baidu.com/yxleimeng/blog/item/364a53fb7ef96579034f5613.html

遺憾的是沒有Linux和Mac OS X版本。所以咱還是果斷只能稍微修改下，把python的版本CUI界面弄得人性化一點，然後放在自己的Windows、Ubuntu和Mac OS X下自動啓動。配合Google Chrome的Proxy SwitchySharp實在是太爽了。

#!usr/bin/env python
# -*- coding:gb2312 -*-

print "sogou代理全網加速器"
print
print "源代碼來自：xiaoxia.org"
print

from threading import Thread, Lock
from struct import unpack
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
from httplib import HTTPResponse
from SocketServer import ThreadingMixIn 
import socket, os, select
import time, sys, random
import threading

# Minimize Memory Usage
threading.stack_size(128*1024)
  
x_sogou_auth = "9CD285F1E7ADB0BD403C22AD1D545F40/30/853edc6d49ba4e27"
proxy_host = "h0.edu.bj.ie.sogou.com"
proxy_port = 80
BufferSize = 8192
RemoteTimeout = 15
local_ip = socket.gethostbyname(socket.gethostname())#獲得本地ip
local_port = 8083 #設定本地代理地址

def calc_sogou_hash(t, host):
    s = (t + host + 'SogouExplorerProxy').encode('ascii')
    code = len(s)
    dwords = int(len(s)/4)
    rest = len(s) % 4
    v = unpack(str(dwords) + 'i'+str(rest)+'s', s)
    for vv in v:
        if(type(vv)==type('i')):
            break
        a = (vv & 0xFFFF)
        b = (vv >> 16)
        code += a
        code = code ^ (((code<<5)^b) << 0xb)
        # To avoid overflows
        code &= 0xffffffff
        code += code >> 0xb 
    if rest == 3:
        code += ord(s[len(s)-2]) * 256 + ord(s[len(s)-3])
        code = code ^ ((code ^ (ord(s[len(s)-1])*4)) << 0x10)
        code &= 0xffffffff
        code += code >> 0xb
    elif rest == 2:
        code += ord(s[len(s)-1]) * 256 + ord(s[len(s)-2])
        code ^= code << 0xb
        code &= 0xffffffff
        code += code >> 0x11
    elif rest == 1:
        code += ord(s[len(s)-1])
        code ^= code << 0xa
        code &= 0xffffffff
        code += code >> 0x1
    code ^= code * 8
    code &= 0xffffffff
    code += code >> 5
    code ^= code << 4
    code = code & 0xffffffff
    code += code >> 0x11
    code ^= code << 0x19
    code = code & 0xffffffff
    code += code >> 6
    code = code & 0xffffffff
    return hex(code)[2:].rstrip('L').zfill(8)

class Handler(BaseHTTPRequestHandler):
    remote = None

    # Ignore Connection Failure
    def handle(self):
        try:  
            BaseHTTPRequestHandler.handle(self)
        except socket.error: pass
    def finish(self):
        try:
            BaseHTTPRequestHandler.finish(self)
        except socket.error: pass

    # CONNECT Data Transfer
    def transfer(self, a, b):
        fdset = [a, b]
        while True:
            r,w,e = select.select(fdset, [], [])
            if a in r:
                data = a.recv(BufferSize)
                if not data: break
                b.sendall(data)
            if b in r:
                data = b.recv(BufferSize)
                if not data: break
                a.sendall(data)

    def sogouProxy(self):
        if self.remote is None or self.lastHost != self.headers["Host"]:
            self.remote = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            self.remote.settimeout(RemoteTimeout)
            self.remote.connect((proxy_host, proxy_port))
        self.remote.sendall(self.requestline.encode('ascii') + b"\r\n")
        # Add Sogou Verification Tags
        self.headers["X-Sogou-Auth"] = x_sogou_auth
        t = hex(int(time.time()))[2:].rstrip('L').zfill(8)
        self.headers["X-Sogou-Tag"] = calc_sogou_hash(t, self.headers['Host'])
        self.headers["X-Sogou-Timestamp"] = t
        headerstr = str(self.headers).replace("\r\n", "\n").replace("\n", "\r\n")
        self.remote.sendall(headerstr.encode('ascii') + b"\r\n")
        # Send Post data
        if self.command == 'POST':
            self.remote.sendall(self.rfile.read(int(self.headers['Content-Length'])))
        response = HTTPResponse(self.remote, method=self.command)
        response.begin()

        # Reply to the browser
        status = "HTTP/1.1 " + str(response.status) + " " + response.reason
        self.wfile.write(status.encode('ascii') + b'\r\n')
        hlist = []
        for line in response.msg.headers: # Fixed multiple values of a same name
            if 'TRANSFER-ENCODING' not in line.upper():
                hlist.append(line)
        self.wfile.write("".join(hlist) + b'\r\n')

        if self.command == "CONNECT" and response.status == 200:
            return self.transfer(self.remote, self.connection)
        else:
            while True:
                response_data = response.read(BufferSize)
                if not response_data: break
                self.wfile.write(response_data)

    do_POST = do_GET = do_CONNECT = sogouProxy
  
class ThreadingHTTPServer(ThreadingMixIn, HTTPServer):
    address_family = socket.AF_INET6

server_address = ("", local_port)
server = ThreadingHTTPServer(server_address, Handler)

print("請選擇您的當下網絡環境:\n\
      1. CERNET 教育網\n\
      2. CTCNET 電信\n\
      3. CNCNET 聯通\n\
      4. DXT    電信通\n\
      輸入數字，如果直接回車則默認選擇教育網: \n\n")
i = raw_input()
if i == 1:
    proxy_host = 'h' + str(random.randint(0,5)) + '.edu.bj.ie.sogou.com'
elif i == 2:
    proxy_host = 'h' + str(random.randint(0,3)) + '.ctc.bj.ie.sogou.com'
elif i == 3:
    proxy_host = 'h' + str(random.randint(0,3)) + '.cnc.bj.ie.sogou.com'
elif i == 4:
    proxy_host = 'h' + str(random.randint(0,10)) + '.dxt.bj.ie.sogou.com'
elif len(i) == 0:
    proxy_host = 'h' + str(random.randint(0,5)) + '.edu.bj.ie.sogou.com'

print("正通過" + proxy_host + "進行代理，請設置代理地址爲：")
print local_ip
print "若是本機，則可設置爲\n127.0.0.1"
print "端口爲："
print local_port

try:
    server.serve_forever()
except: 
    os._exit(1)